/* ==========================================================================
   DESIGN SYSTEM - CSS Variables
   Modern color palette with dark slate + emerald accent theme.
   Using Inter font for clean, professional typography.
   ========================================================================== */
:root {
  /* Typography */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  /* Color Palette — Dark Slate & Emerald */
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;

  --color-primary: #059669; /* Emerald-600 */
  --color-primary-hover: #047857; /* Emerald-700 */
  --color-primary-light: #d1fae5; /* Emerald-100 */
  --color-primary-50: #ecfdf5;

  --color-accent: #0f172a; /* Slate-900 — calculator header */
  --color-accent-light: #1e293b; /* Slate-800 */

  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  --color-footer-bg: #0f172a;
  --color-footer-text: #cbd5e1;

  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max: 1100px;
  --header-height: 64px;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

#main-content {
  flex: 1;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.logo:hover { text-decoration: none; }

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #10b981);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
}

.logo-text { display: flex; flex-direction: column; }

.logo-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.logo-name sup {
  font-size: 0.55rem;
  vertical-align: super;
  color: var(--color-text-muted);
}

.logo-tagline {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.search-form {
  flex: 1;
  max-width: 440px;
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 3px 3px 3px var(--space-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  overflow: hidden;
}

.search-form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background: var(--color-surface);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  color: var(--color-text);
  padding: var(--space-xs) 0;
}

.search-input::placeholder { color: var(--color-text-muted); }

.search-button {
  background: var(--color-primary);
  border: none;
  color: #fff;
  border-radius: var(--radius-full);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  margin-left: var(--space-xs);
  flex-shrink: 0;
}

.search-button:hover { background: var(--color-primary-hover); transform: scale(1.05); }
.search-button:active { transform: scale(0.95); }
.search-btn-svg { width: 15px; height: 15px; stroke-width: 2.5; }

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.header-nav a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.header-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-50);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  transition: color var(--transition-fast);
  align-items: center;
  justify-content: center;
}

.menu-toggle:hover { color: var(--color-primary); }
.menu-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary-light);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   SHARED SECTION STYLES
   ========================================================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h1,
.section-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-header h1 {
  font-size: 2.25rem;
}

.section-number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  margin-right: var(--space-sm);
  vertical-align: middle;
  letter-spacing: 0.05em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

.alt-bg {
  background: var(--color-surface);
}

/* ==========================================================================
   1. HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: var(--space-4xl) 0 var(--space-3xl);
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #064e3b 100%);
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(16, 185, 129, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 30% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-content h2 {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, #ffffff 0%, #a7f3d0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-intro {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-xl);
  max-width: 560px;
}

.hero-intro strong { color: #6ee7b7; }
.hero-intro em { color: #a7f3d0; font-style: normal; font-weight: 600; }

.hero-benefits {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm) var(--space-lg);
  margin-bottom: var(--space-xl);
}

.hero-benefits li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
}

.benefit-icon {
  font-size: 1.1rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-cta {
  padding: 12px 28px;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none !important;
  transition: all var(--transition-base);
}

.hero-cta.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-primary);
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.4);
}

.hero-cta.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(5, 150, 105, 0.5);
}

.hero-cta.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
}

.hero-cta.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Hero Clock Widget */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.live-clock-widget {
  text-align: center;
}

.hero-clock-svg {
  width: 220px;
  height: 220px;
  filter: drop-shadow(0 8px 32px rgba(0, 0, 0, 0.4));
}

.clock-face {
  fill: none;
  stroke: rgba(255, 255, 255, 0.15);
  stroke-width: 2;
}

.clock-inner {
  fill: rgba(15, 23, 42, 0.8);
  stroke: rgba(16, 185, 129, 0.3);
  stroke-width: 1.5;
}

.clock-markers line {
  stroke: rgba(255, 255, 255, 0.4);
  stroke-width: 1.5;
}

.clock-markers line.major {
  stroke: rgba(255, 255, 255, 0.7);
  stroke-width: 2.5;
}

.clock-numbers text {
  fill: rgba(255, 255, 255, 0.7);
  font-family: var(--font-primary);
  font-size: 9px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: central;
}

.clock-numbers text.inner-num {
  fill: rgba(110, 231, 183, 0.6);
  font-size: 7px;
  font-weight: 500;
}

.clock-hand {
  stroke-linecap: round;
}

.hour-hand {
  stroke: #ffffff;
  stroke-width: 3.5;
}

.minute-hand {
  stroke: #d1fae5;
  stroke-width: 2.5;
}

.second-hand {
  stroke: #10b981;
  stroke-width: 1;
  transition: none;
}

.clock-center {
  fill: #10b981;
}

.clock-digital {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.clock-mil {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: #6ee7b7;
  letter-spacing: 0.05em;
}

.clock-std {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

/* ==========================================================================
   2. CONVERTER SECTION
   ========================================================================== */
.converter-section {
  padding: var(--space-3xl) 0;
}

.calculator-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  max-width: 560px;
}

.calculator-header {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md) var(--space-lg);
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  letter-spacing: 0.01em;
}

.calculator-header svg { opacity: 0.8; }

.calculator-body {
  padding: var(--space-xl);
}

.converter-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.converter-tab {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-primary);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.converter-tab.active {
  background: var(--color-primary);
  color: #fff;
}

.converter-tab:hover:not(.active) {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.converter-panel {
  display: none;
  margin-bottom: var(--space-lg);
  padding-top: var(--space-sm);
}

.converter-panel.active {
  display: block;
}

.input-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  text-align: center;
  font-weight: 500;
}

.time-input-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.time-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-right: var(--space-xs);
}

.time-field {
  width: 56px;
  height: 42px;
  padding: var(--space-sm);
  font-size: 1.1rem;
  font-family: var(--font-mono);
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.time-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.time-field-wide {
  width: 90px;
}

.time-colon {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-text-secondary);
}

.ampm-select {
  height: 42px;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
  font-family: var(--font-primary);
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: var(--color-bg);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.ampm-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.button-row {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.calc-btn {
  flex: 1;
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9rem;
  font-family: var(--font-primary);
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.answer-section {
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.answer-label {
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.answer-table { width: 100%; border-collapse: collapse; }
.answer-table tr + tr { border-top: 1px solid var(--color-primary-light); }
.answer-table td { padding: var(--space-sm) 0; font-size: 0.9375rem; vertical-align: middle; }
.answer-key { color: var(--color-text-secondary); font-weight: 500; width: 45%; }
.answer-value { font-weight: 700; color: var(--color-text); font-family: var(--font-mono); font-size: 1rem; text-align: right; }

.calculator-meta {
  padding: var(--space-md) var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg);
}

.converter-how {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ==========================================================================
   3. EXAMPLE CONVERSIONS
   ========================================================================== */
.examples-section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-md);
}

.example-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.example-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-50), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.example-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.example-card:hover::before { opacity: 1; }

.example-card.animate-flash {
  animation: cardFlash 0.6s ease;
}

@keyframes cardFlash {
  0% { transform: scale(1); }
  30% { transform: scale(1.06); box-shadow: 0 0 0 4px var(--color-primary-light); }
  100% { transform: scale(1); }
}

.ex-mil {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  position: relative;
}

.ex-arrow {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: var(--space-xs) 0;
  position: relative;
}

.ex-std {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  position: relative;
}

.ex-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  position: relative;
}

/* ==========================================================================
   4. MILITARY TIME CHART (SEARCHABLE)
   ========================================================================== */
.chart-section {
  padding: var(--space-3xl) 0;
}

.chart-search-wrapper {
  position: relative;
  max-width: 400px;
  margin: 0 auto var(--space-lg);
}

.chart-search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  font-size: 0.9rem;
  font-family: var(--font-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chart-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.chart-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
}

.chart-table-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.military-chart {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.military-chart th {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: none;
}

.military-chart td {
  padding: var(--space-sm) var(--space-lg);
  text-align: center;
  font-size: 0.875rem;
  vertical-align: top;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
}

.military-chart td:nth-child(odd) {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-primary);
}

.military-chart tbody tr:hover {
  background: var(--color-primary-50);
}

.military-chart tbody tr:last-child td {
  border-bottom: none;
}

.military-chart tbody tr.highlight {
  background: var(--color-primary-light) !important;
  font-weight: 700;
}

.military-chart tbody tr.hidden-row {
  display: none;
}

.chart-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-md);
}

/* ==========================================================================
   5 & 6. GUIDE SECTIONS (Mil→Std, Std→Mil)
   ========================================================================== */
.guide-section {
  padding: var(--space-3xl) 0;
}

/* Step Diagram */
.step-diagram {
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
}

.step-track {
  position: relative;
}

.step-card {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  animation: stepSlideIn 0.3s ease;
}

.step-card.active {
  display: block;
}

@keyframes stepSlideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--space-md);
}

.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.step-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.step-card code {
  background: var(--color-primary-50);
  color: var(--color-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  font-weight: 600;
}

.step-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-lg);
  gap: var(--space-md);
}

.step-indicator {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.step-nav .calc-btn {
  flex: 0;
  min-width: 120px;
}

.step-nav .calc-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* Guide Extras (2-col) */
.guide-extras {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.guide-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-light);
}

.guide-card ul {
  margin: 0;
  padding-left: var(--space-lg);
}

.guide-card li {
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.guide-card li::marker { color: var(--color-primary); }

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.mini-table th {
  background: var(--color-primary-50);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary-light);
}

.mini-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* Period Cards */
.period-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.period-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.period-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.period-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.period-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.period-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.period-card code {
  background: var(--color-primary-50);
  color: var(--color-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  font-weight: 600;
}

/* Quiz Widget */
.quiz-widget {
  max-width: 500px;
  margin: 0 auto;
  background: var(--color-bg);
  border: 2px solid var(--color-primary-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.quiz-widget h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

.quiz-prompt {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.quiz-question {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  font-family: var(--font-mono);
}

.quiz-input-row {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.quiz-input-row .calc-btn { flex: 0; min-width: 100px; }

.quiz-feedback {
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 1.4em;
  transition: color var(--transition-fast);
}

.quiz-feedback.correct { color: var(--color-primary); }
.quiz-feedback.incorrect { color: var(--color-danger); }

/* ==========================================================================
   7. FORMULA SECTION
   ========================================================================== */
.formula-section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.formula-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.formula-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--color-primary-50);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.formula-badge.accent {
  background: #fef3c7;
  color: #92400e;
}

.formula-equation {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  text-align: center;
  margin-bottom: var(--space-md);
}

.formula-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.formula-example {
  background: var(--color-primary-50);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text);
}

.formula-example span {
  font-weight: 600;
  color: var(--color-primary);
}

.formula-example code {
  font-family: var(--font-mono);
  background: rgba(5, 150, 105, 0.1);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Live Formula Calculator */
.formula-live {
  max-width: 500px;
  margin: 0 auto;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.formula-live h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
}

.formula-live-row {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.formula-live-row .calc-btn { flex: 0; }

.formula-steps {
  text-align: left;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.formula-steps .fs-step {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
  animation: fadeIn 0.3s ease;
}

.formula-steps .fs-step:last-child { border-bottom: none; }

.formula-steps .fs-result {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.1rem;
  font-family: var(--font-mono);
}

/* ==========================================================================
   8. HOW TO READ MILITARY TIME
   ========================================================================== */
.read-section {
  padding: var(--space-3xl) 0;
}

.read-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.read-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.read-card.full-width {
  grid-column: 1 / -1;
}

.read-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.read-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.read-card ul {
  padding-left: var(--space-lg);
}

.read-card li {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.read-card li::marker { color: var(--color-primary); }

/* Digit Breakdown Visual */
.digit-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs) var(--space-md);
  max-width: 200px;
  margin: 0 auto;
  text-align: center;
}

.digit-box {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  display: block;
}

.digit-box.hour {
  background: var(--color-primary-50);
  color: var(--color-primary);
  border: 2px solid var(--color-primary-light);
}

.digit-box.minute {
  background: #eff6ff;
  color: #2563eb;
  border: 2px solid #bfdbfe;
}

.digit-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

/* Pronunciation Guide */
.pronunciation-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.pron-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.pron-item:hover {
  background: var(--color-primary-50);
}

.pron-time {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-primary);
  min-width: 48px;
}

.pron-say {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ==========================================================================
   9. DETAILED EXAMPLES (ACCORDION)
   ========================================================================== */
.detailed-examples-section {
  padding: var(--space-3xl) 0;
}

.accordion {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.accordion-item.open {
  border-color: var(--color-primary-light);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  color: var(--color-text);
  transition: background var(--transition-fast);
  gap: var(--space-md);
}

.accordion-trigger:hover {
  background: var(--color-primary-50);
}

.acc-mil {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
  min-width: 52px;
}

.acc-std {
  font-weight: 600;
  flex: 1;
  text-align: left;
}

.acc-q {
  flex: 1;
  text-align: left;
  font-weight: 600;
}

.acc-toggle {
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.accordion-item.open .acc-toggle {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
  background: var(--color-bg);
}

.accordion-item.open .accordion-content {
  max-height: 300px;
  padding: var(--space-md) var(--space-lg);
}

.accordion-content p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ==========================================================================
   10. WHY MILITARY TIME IS USED
   ========================================================================== */
.why-section {
  padding: var(--space-3xl) 0;
}

.reason-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.reason-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.reason-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.reason-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.reason-card:hover::after {
  transform: scaleX(1);
}

.reason-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.reason-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.reason-card p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   11. WHO USES MILITARY TIME
   ========================================================================== */
.who-section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.user-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-md);
}

.user-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.user-card:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.user-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.user-card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.user-card p {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  display: none;
}

.user-card:hover p {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* ==========================================================================
   12. COMPARISON SECTION
   ========================================================================== */
.comparison-section {
  padding: var(--space-3xl) 0;
}

.comparison-table-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-2xl);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.comparison-table th {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
}

.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.85rem;
  color: var(--color-text);
}

.comparison-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
}

.comparison-table tbody tr:hover {
  background: var(--color-primary-50);
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

/* Comparison Bar Chart */
.comparison-visual {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.comp-bar-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.comp-bar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.comp-bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.comp-bar {
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  width: 0;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.comp-bar.military {
  background: linear-gradient(90deg, var(--color-primary), #10b981);
}

.comp-bar.standard {
  background: linear-gradient(90deg, #64748b, #94a3b8);
}

.comp-bar.animated {
  width: var(--bar-width);
}

.comp-bar span {
  white-space: nowrap;
}

/* ==========================================================================
   13. COMMON CONVERSION TABLE
   ========================================================================== */
.common-table-section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.common-table-wrapper {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 500px;
  margin: 0 auto;
}

.common-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.common-table th {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md);
  font-weight: 600;
  font-size: 0.8125rem;
}

.common-table td {
  padding: var(--space-md);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.875rem;
}

.common-table td:first-child { font-weight: 500; }

.common-table td:nth-child(2) {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.common-table td:last-child {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-primary);
}

.common-table tbody tr {
  cursor: pointer;
  transition: background var(--transition-fast);
}

.common-table tbody tr:hover {
  background: var(--color-primary-50);
}

.common-table tbody tr:last-child td {
  border-bottom: none;
}

/* ==========================================================================
   14. FAQ SECTION
   ========================================================================== */
.faq-section {
  padding: var(--space-3xl) 0;
}

.faq-accordion {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

/* ==========================================================================
   15. RELATED TOOLS
   ========================================================================== */
.tools-section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.tool-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-decoration: none !important;
  transition: all var(--transition-base);
  color: var(--color-text) !important;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.tool-icon {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.tool-card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.tool-card p {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   16. META / CITATION SECTION
   ========================================================================== */
.meta-section {
  padding: var(--space-3xl) 0;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.meta-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.meta-card h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
}

.meta-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.meta-card .cite-date {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
#site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: auto;
}

.footer-inner { width: 100%; }

.footer-links {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-footer {
  display: inline-flex !important;
  align-items: center;
  gap: var(--space-sm);
  padding: 0 !important;
  text-decoration: none !important;
  margin-bottom: var(--space-sm);
}

.logo-footer:hover { text-decoration: none !important; }
.logo-footer .logo-name { color: #fff; }
.logo-footer .logo-tagline { color: var(--color-text-muted); }

.footer-tagline-text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.footer-socials {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.social-link {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-footer-text) !important;
  transition: all var(--transition-fast) !important;
  padding: 0 !important;
}

.social-link:hover {
  background: var(--color-primary) !important;
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.social-link svg { transition: transform var(--transition-fast); }
.social-link:hover svg { transform: scale(1.1); }

.footer-col h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
}

.footer-col a {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-footer-text);
  text-decoration: none;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover { color: #fff; text-decoration: none; }

.footer-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-btn {
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-xs);
  padding: 10px 18px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-primary);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.footer-btn:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
  transform: translateY(-1px);
}

.footer-btn:active { transform: translateY(0); }

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
}

.footer-copyright { color: var(--color-footer-text); }
.footer-rights { color: var(--color-text-muted); }

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 768px) {
  :root { --container-max: 100%; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }

  .hero-content h1 { font-size: 2rem; }
  .hero-intro { max-width: 100%; }
  .hero-benefits { grid-template-columns: 1fr; justify-items: center; }
  .hero-ctas { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-clock-svg { width: 180px; height: 180px; }

  .calculator-card { max-width: 100%; }

  .example-grid { grid-template-columns: repeat(3, 1fr); }
  .period-cards { grid-template-columns: 1fr 1fr; }
  .reason-grid { grid-template-columns: 1fr 1fr; }
  .user-grid { grid-template-columns: repeat(3, 1fr); }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .read-grid { grid-template-columns: 1fr; }
  .guide-extras { grid-template-columns: 1fr; }
  .meta-grid { grid-template-columns: 1fr; }

  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .menu-toggle { display: flex; }

  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-sm);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .header-nav.active { display: flex; }

  .section-header h2 { font-size: 1.4rem; }
  .comparison-table { font-size: 0.8rem; }
  .comparison-table th,
  .comparison-table td { padding: var(--space-sm); }
}

@media (max-width: 480px) {
  .header-inner { flex-wrap: wrap; gap: var(--space-sm); }
  .search-form { order: 3; flex: 1 1 100%; max-width: 100%; }

  #site-header { height: auto; padding: var(--space-sm) 0; }
  .hero-section { padding: var(--space-2xl) 0; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-clock-svg { width: 150px; height: 150px; }

  .example-grid { grid-template-columns: repeat(2, 1fr); }
  .period-cards { grid-template-columns: 1fr; }
  .reason-grid { grid-template-columns: 1fr; }
  .user-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: 1fr; }
  .formula-grid { grid-template-columns: 1fr; }

  .section-header h2 { font-size: 1.2rem; }

  .military-chart th,
  .military-chart td { padding: var(--space-sm); font-size: 0.75rem; }

  .button-row { flex-direction: column; }

  .step-nav { flex-wrap: wrap; justify-content: center; }

  .quiz-input-row { flex-direction: column; align-items: center; }
  .quiz-input-row .calc-btn { width: 100%; }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
}

/* ==========================================================================
   COOKIE CONSENT & PREFERENCES MODAL
   ========================================================================== */
.cookie-consent-banner {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-lg);
  z-index: 1000;
  animation: cookieSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

@keyframes cookieSlideUp {
  from { transform: translateY(100px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.cookie-consent-text {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.cookie-consent-text a {
  color: var(--color-primary);
  font-weight: 600;
}

.cookie-consent-buttons {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.cookie-consent-buttons button {
  flex: 1;
  min-width: 90px;
  padding: 8px 16px;
  font-size: 0.8125rem;
}

.cookie-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  animation: cookieFadeIn 0.2s ease;
}

@keyframes cookieFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.cookie-modal-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 500px;
  overflow: hidden;
  animation: cookieScaleUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cookieScaleUp {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.cookie-modal-header {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cookie-modal-header h2 { font-size: 1rem; font-weight: 600; }

.cookie-modal-close-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition-fast);
}

.cookie-modal-close-btn:hover { color: #fff; }

.cookie-modal-body {
  padding: var(--space-lg);
  max-height: 380px;
  overflow-y: auto;
}

.cookie-modal-intro {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.cookie-modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg);
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

.cookie-modal-footer button { padding: 8px 16px; font-size: 0.8125rem; }

.switch-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.switch-container:last-of-type { border-bottom: none; }

.switch-info { flex: 1; padding-right: var(--space-md); }
.switch-title { font-weight: 600; color: var(--color-text); font-size: 0.9rem; margin-bottom: 2px; }
.switch-desc { font-size: 0.75rem; color: var(--color-text-secondary); line-height: 1.4; }

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--color-border);
  transition: 0.2s ease;
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.2s ease;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

input:checked + .toggle-slider { background-color: var(--color-primary); }
input:checked + .toggle-slider:before { transform: translateX(20px); }
input:disabled + .toggle-slider { background-color: var(--color-border-light); cursor: not-allowed; opacity: 0.6; }

@media (max-width: 480px) {
  .cookie-consent-banner {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
    max-width: none;
  }
}

/* ==========================================================================
   SCROLL REVEAL ANIMATION
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   SUB-PAGES STYLING (Contact, legal, blog, etc.)
   ========================================================================== */
.subpage-header {
  text-align: center;
  padding: var(--space-xl) 0 var(--space-2xl);
}
.subpage-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}
.subpage-header p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Legal Content Section */
.legal-container {
  max-width: 800px;
  margin: 0 auto var(--space-4xl);
}
.legal-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
}
.legal-card h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-primary-light);
}
.legal-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.legal-card ul, .legal-card ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}
.legal-card li {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

/* Contact Form Page */
.contact-container {
  max-width: 600px;
  margin: 0 auto var(--space-4xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
}
.form-group {
  margin-bottom: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.95rem;
  font-family: var(--font-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  background: var(--color-surface);
}
.form-group textarea {
  resize: vertical;
  min-height: 150px;
}
.contact-submit-btn {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
}
.form-message {
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  margin-top: var(--space-md);
  display: none;
}
.form-message.success {
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-light);
  color: var(--color-primary);
}
.form-message.error {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: var(--color-danger);
}

/* Blogs Page Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-4xl);
}
.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}
.blog-image-placeholder {
  height: 180px;
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 3rem;
  position: relative;
}
.blog-image-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, transparent 20%, rgba(0,0,0,0.3) 100%);
}
.blog-card-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.blog-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--color-primary-50);
  color: var(--color-primary);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}
.blog-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}
.blog-card h2 a {
  color: var(--color-text);
  text-decoration: none;
}
.blog-card h2 a:hover {
  color: var(--color-primary);
}
.blog-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  flex: 1;
}
.blog-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-md);
}
.blog-author {
  font-weight: 600;
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .legal-card {
    padding: var(--space-xl);
  }
  .contact-container {
    padding: var(--space-xl);
  }
}

/* ==========================================================================
   LANGUAGE SWITCHER STYLES
   ========================================================================== */
.lang-switcher-wrapper {
  display: flex;
  align-items: center;
  margin-left: var(--space-md);
}

.lang-select {
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-family: var(--font-primary);
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.lang-select:focus,
.lang-select:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* RTL Layout support */
[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] body {
  direction: rtl;
}

/* Fix direction for inputs/numbers in RTL to keep them standard */
[dir="rtl"] input,
[dir="rtl"] select,
[dir="rtl"] .clock-mil,
[dir="rtl"] .clock-std,
[dir="rtl"] .time-field,
[dir="rtl"] .ex-mil,
[dir="rtl"] .ex-std,
[dir="rtl"] .answer-value,
[dir="rtl"] .common-table td:last-child,
[dir="rtl"] .answer-table td:last-child {
  direction: ltr;
  text-align: left;
}

@media (max-width: 768px) {
  .lang-switcher-wrapper {
    margin-left: 0;
    margin-top: var(--space-sm);
    width: 100%;
  }
  .lang-select {
    width: 100%;
  }
}

/* ==========================================================================
   NEW HOMEPAGE SECTIONS - Interactive Elements
   ========================================================================== */

/* --- Content Section Base --- */
.content-section {
  padding: var(--space-3xl) 0;
}
.content-section.alt-bg {
  background-color: var(--color-border-light);
}
.content-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  margin-top: var(--space-xl);
}
.content-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

/* --- 24-Hour Timeline Widget --- */
.timeline-widget {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}
.timeline-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
  text-align: center;
}
.timeline-svg {
  width: 100%;
  height: auto;
}
.timeline-bar {
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.timeline-am {
  fill: var(--color-primary-light);
  stroke: var(--color-primary);
  stroke-width: 1.5;
}
.timeline-pm {
  fill: #dbeafe;
  stroke: #3b82f6;
  stroke-width: 1.5;
}
.timeline-bar-label {
  font-size: 11px;
  fill: var(--color-text);
  text-anchor: middle;
  dominant-baseline: central;
  font-weight: 600;
  pointer-events: none;
}
.timeline-key-label {
  font-size: 13px;
  font-weight: 700;
  fill: var(--color-text);
  font-family: var(--font-mono);
}
.timeline-key-sublabel {
  font-size: 10px;
  fill: var(--color-text-secondary);
}
.timeline-hour-marker {
  cursor: pointer;
  transition: all var(--transition-fast);
}
.timeline-hour-marker:hover {
  opacity: 0.7;
}
.timeline-tooltip {
  position: absolute;
  background: var(--color-accent);
  color: white;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  pointer-events: none;
  white-space: nowrap;
  z-index: 10;
  box-shadow: var(--shadow-lg);
}

/* --- Interactive Circular Clock Diagram --- */
.clock-diagram-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}
.clock-diagram-widget {
  width: 320px;
  height: 320px;
  flex-shrink: 0;
}
.clock-diagram-svg {
  width: 100%;
  height: 100%;
}
.cd-ring {
  fill: none;
  stroke-width: 2;
}
.cd-outer-ring {
  stroke: var(--color-primary);
  fill: var(--color-primary-50);
}
.cd-inner-ring {
  stroke: #3b82f6;
  fill: #eff6ff;
}
.cd-center-circle {
  fill: var(--color-accent);
}
.cd-center-label {
  fill: white;
  font-size: 13px;
  text-anchor: middle;
  font-weight: 500;
}
.cd-hour-text {
  font-size: 11px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: central;
  cursor: pointer;
  transition: all var(--transition-fast);
  pointer-events: all;
}
.cd-hour-text.outer {
  fill: var(--color-primary-hover);
}
.cd-hour-text.inner {
  fill: #2563eb;
}
.cd-hour-text:hover,
.cd-hour-text.active {
  font-size: 14px;
  font-weight: 800;
}
.cd-hour-bg {
  fill: transparent;
  cursor: pointer;
}
.cd-hour-bg:hover {
  fill: rgba(5, 150, 105, 0.1);
}
.clock-diagram-legend {
  text-align: left;
}
.cd-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}
.cd-legend-dot {
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  display: inline-block;
}
.cd-outer-dot {
  background: var(--color-primary-light);
  border: 2px solid var(--color-primary);
}
.cd-inner-dot {
  background: #dbeafe;
  border: 2px solid #3b82f6;
}
.cd-legend-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* --- Animated Step Flow Diagram --- */
.step-flow {
  margin-top: var(--space-xl);
}
.step-flow-track {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding-bottom: var(--space-md);
}
.step-flow-card {
  flex: 1;
  min-width: 200px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  transition: all var(--transition-smooth);
  opacity: 0;
  transform: translateY(20px);
}
.step-flow-card.animated {
  opacity: 1;
  transform: translateY(0);
}
.step-flow-card:nth-child(1).animated { transition-delay: 0ms; }
.step-flow-card:nth-child(3).animated { transition-delay: 200ms; }
.step-flow-card:nth-child(5).animated { transition-delay: 400ms; }
.step-flow-card:nth-child(7).animated { transition-delay: 600ms; }
.step-flow-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}
.step-flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}
.step-flow-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}
.step-flow-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}
.step-flow-formula {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary-50);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary-hover);
}
.step-flow-arrow {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  font-weight: 700;
  padding: 0 var(--space-sm);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}
.step-flow-arrow.animated {
  opacity: 1;
}

/* --- Decision Tree Flowchart --- */
.decision-tree {
  margin-top: var(--space-xl);
  text-align: center;
}
.dt-start {
  margin-bottom: var(--space-lg);
}
.dt-node {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: default;
}
.dt-question {
  background: var(--color-accent);
  color: white;
  box-shadow: var(--shadow-md);
}
.dt-node-icon {
  font-size: 1.25rem;
}
.dt-branches {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-md);
  position: relative;
}
.dt-branches::before {
  content: '';
  position: absolute;
  top: -var(--space-md);
  left: 25%;
  right: 25%;
  height: 2px;
  background: var(--color-border);
}
.dt-branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}
.dt-option {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
}
.dt-option:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.dt-option.active {
  border-color: var(--color-primary);
  background: var(--color-primary-50);
}
.dt-range {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}
.dt-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}
.dt-answer {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-size: 0.875rem;
  line-height: 1.6;
  text-align: left;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all var(--transition-smooth);
}
.dt-branch.active .dt-answer {
  max-height: 200px;
  opacity: 1;
  margin-top: var(--space-sm);
}

/* --- Try-It Mini Calculator Widgets --- */
.try-it-widget {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.try-it-widget h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  text-align: center;
}
.try-it-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.try-it-result {
  margin-top: var(--space-md);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  min-height: 2rem;
}

/* --- Conversion Cards Grid --- */
.conversion-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}
.conversion-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.conversion-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #3b82f6);
  transform: scaleX(0);
  transition: transform var(--transition-smooth);
}
.conversion-card:hover::before {
  transform: scaleX(1);
}
.conversion-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.conversion-card.clicked {
  animation: cardClick 0.4s ease;
}
@keyframes cardClick {
  0% { transform: scale(1); }
  50% { transform: scale(0.95); background: var(--color-primary-50); }
  100% { transform: scale(1); }
}
.cc-military {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
}
.cc-arrow {
  color: var(--color-text-muted);
  margin: var(--space-xs) 0;
}
.cc-standard {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}
.cc-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  font-family: var(--font-mono);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .content-two-col {
    grid-template-columns: 1fr;
  }
  .clock-diagram-wrapper {
    flex-direction: column;
  }
  .clock-diagram-widget {
    width: 260px;
    height: 260px;
  }
  .step-flow-track {
    flex-direction: column;
    align-items: center;
  }
  .step-flow-card {
    min-width: unset;
    width: 100%;
  }
  .step-flow-arrow {
    transform: rotate(90deg);
    padding: var(--space-xs) 0;
  }
  .dt-branches {
    grid-template-columns: repeat(2, 1fr);
  }
  .conversion-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .dt-branches {
    grid-template-columns: 1fr;
  }
  .conversion-cards-grid {
    grid-template-columns: 1fr 1fr;
  }
}