/* ============================================================
   時空遺產・私人古蹟重建與歷史資產主權總署
   Chronos Heritage & Historical Sovereignty Authority
   
   Design System: Neoclassicism + Archaeological Precision Aesthetics
   Color Palette: Papal Crimson, Imperial Gold, Parchment White, Obsidian Black
   Typography: Classical Serif + Latin Calligraphy Elements
   ============================================================ */

/* ============================================================
   1. ROOT VARIABLES & COLOR SYSTEM
   ============================================================ */

:root {
  /* Primary Colors */
  --color-crimson: #7B001C;        /* 教皇紅 - Authority & History */
  --color-gold: #C5A059;            /* 帝國古金 - Heritage & Prestige */
  --color-parchment: #F5E6BE;       /* 羊皮紙白 - Historical Depth */
  --color-obsidian: #1A1A1B;        /* 深淵黑曜石 - Time & Eternity */
  
  /* Secondary Colors */
  --color-dark-gold: #8B7355;       /* Darker gold for accents */
  --color-light-parchment: #FAF3E0; /* Lighter parchment for backgrounds */
  --color-deep-crimson: #5A0015;    /* Deeper crimson for hover states */
  --color-silver: #D4AF9F;          /* Silver-gold for subtle highlights */
  
  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-gray-light: #E8E8E8;
  --color-gray-medium: #999999;
  --color-gray-dark: #333333;
  
  /* Typography */
  --font-serif: 'Playfair Display', 'Garamond', serif;
  --font-body: 'Lora', 'Georgia', serif;
  --font-calligraphy: 'Tangerine', 'Brush Script MT', cursive;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 5rem;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-gold: 0 0 20px rgba(197, 160, 89, 0.3);
  --shadow-crimson: 0 0 20px rgba(123, 0, 28, 0.2);
  
  /* Border Radius */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  
  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* ============================================================
   2. GLOBAL STYLES
   ============================================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-obsidian);
  color: var(--color-parchment);
  line-height: 1.6;
  letter-spacing: 0.3px;
  overflow-x: hidden;
}

/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
  color: var(--color-gold);
}

h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 2px;
}

h2 {
  font-size: 2.5rem;
  line-height: 1.3;
  letter-spacing: 1.5px;
}

h3 {
  font-size: 1.8rem;
  letter-spacing: 1px;
}

h4 {
  font-size: 1.4rem;
  letter-spacing: 0.8px;
}

h5 {
  font-size: 1.1rem;
  letter-spacing: 0.5px;
}

h6 {
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}

p {
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.8;
}

.lead {
  font-size: 1.3rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-silver);
}

.subtitle {
  font-family: var(--font-calligraphy);
  font-size: 1.8rem;
  color: var(--color-gold);
  font-weight: 400;
  margin-bottom: var(--spacing-md);
}

small {
  font-size: 0.85rem;
  color: var(--color-gray-medium);
}

/* ============================================================
   4. LINKS & ANCHORS
   ============================================================ */

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: all var(--transition-normal);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-silver);
  border-bottom-color: var(--color-gold);
}

/* ============================================================
   5. BUTTONS
   ============================================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  background-color: transparent;
  color: var(--color-gold);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--color-gold);
  z-index: -1;
  transition: left var(--transition-normal);
}

.btn:hover {
  color: var(--color-obsidian);
  box-shadow: var(--shadow-gold);
}

.btn:hover::before {
  left: 0;
}

.btn-primary {
  background-color: var(--color-crimson);
  border-color: var(--color-crimson);
  color: var(--color-parchment);
}

.btn-primary::before {
  background-color: var(--color-crimson);
}

.btn-primary:hover {
  color: var(--color-parchment);
  background-color: var(--color-deep-crimson);
  border-color: var(--color-deep-crimson);
  box-shadow: var(--shadow-crimson);
}

.btn-gold {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-obsidian);
}

.btn-gold::before {
  background-color: var(--color-obsidian);
}

.btn-gold:hover {
  color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: 1.1rem;
  letter-spacing: 1.2px;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.85rem;
  letter-spacing: 0.8px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Wax Seal Button Effect */
.btn-seal {
  border-radius: 50%;
  width: 60px;
  height: 60px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3), 0 4px 8px rgba(0, 0, 0, 0.2);
  position: relative;
}

.btn-seal:active {
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
  transform: translateY(2px);
}

/* ============================================================
   6. NAVIGATION
   ============================================================ */

.navbar {
  background-color: var(--color-obsidian);
  border-bottom: 2px solid var(--color-gold);
  padding: var(--spacing-sm) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.navbar-brand {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-gold) !important;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all var(--transition-normal);
}

.navbar-brand:hover {
  color: var(--color-silver) !important;
  text-shadow: 0 0 10px rgba(197, 160, 89, 0.5);
}

.nav-link {
  color: var(--color-parchment) !important;
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  margin: 0 var(--spacing-md);
  position: relative;
  transition: all var(--transition-normal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-gold);
  transition: width var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-gold) !important;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-gold) !important;
}

.nav-link.active::after {
  width: 100%;
}

/* ============================================================
   7. HERO SECTION
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-obsidian) 0%, #2a2a2c 50%, var(--color-obsidian) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(123, 0, 28, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(197, 160, 89, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
  padding: var(--spacing-2xl);
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 4px 20px rgba(123, 0, 28, 0.3);
  animation: fadeInDown 1s ease-out;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--color-silver);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
  line-height: 1.8;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-cta {
  margin-top: var(--spacing-2xl);
  animation: fadeInUp 1s ease-out 0.4s both;
}

/* ============================================================
   8. SECTIONS & CONTAINERS
   ============================================================ */

.section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
}

.section-dark {
  background-color: var(--color-obsidian);
  color: var(--color-parchment);
}

.section-light {
  background-color: var(--color-light-parchment);
  color: var(--color-obsidian);
}

.section-light h1, .section-light h2, .section-light h3,
.section-light h4, .section-light h5, .section-light h6 {
  color: var(--color-crimson);
}

.section-light a {
  color: var(--color-crimson);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  position: relative;
  padding-bottom: var(--spacing-lg);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

/* ============================================================
   9. CARDS
   ============================================================ */

.card {
  background-color: rgba(26, 26, 27, 0.8);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(197, 160, 89, 0.1), transparent);
  transition: left var(--transition-slow);
  pointer-events: none;
}

.card:hover {
  border-color: var(--color-silver);
  box-shadow: var(--shadow-gold);
  transform: translateY(-5px);
}

.card:hover::before {
  left: 100%;
}

.card-title {
  color: var(--color-gold);
  font-size: 1.3rem;
  margin-bottom: var(--spacing-md);
}

.card-text {
  color: var(--color-parchment);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ============================================================
   10. FORMS
   ============================================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-md);
  color: var(--color-parchment);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.form-control::placeholder {
  color: var(--color-gray-medium);
}

.form-control:focus {
  outline: none;
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-silver);
  box-shadow: 0 0 10px rgba(197, 160, 89, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-check {
  margin-bottom: var(--spacing-md);
}

.form-check-input {
  accent-color: var(--color-gold);
  cursor: pointer;
}

.form-check-label {
  color: var(--color-parchment);
  cursor: pointer;
  margin-left: var(--spacing-sm);
}

/* ============================================================
   11. GRID & LAYOUT
   ============================================================ */

.row {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.row.row-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.row.row-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.row.row-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.col {
  flex: 1;
}

/* ============================================================
   12. ANIMATIONS
   ============================================================ */

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(197, 160, 89, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(197, 160, 89, 0.6);
  }
}

@keyframes crackEffect {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

/* ============================================================
   13. UTILITY CLASSES
   ============================================================ */

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-gold {
  color: var(--color-gold);
}

.text-crimson {
  color: var(--color-crimson);
}

.text-parchment {
  color: var(--color-parchment);
}

.text-silver {
  color: var(--color-silver);
}

.text-muted {
  color: var(--color-gray-medium);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.hidden {
  display: none;
}

.visible {
  display: block;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

/* ============================================================
   14. FOOTER
   ============================================================ */

footer {
  background-color: var(--color-obsidian);
  border-top: 2px solid var(--color-gold);
  padding: var(--spacing-2xl) var(--spacing-lg);
  color: var(--color-parchment);
  font-size: 0.9rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: var(--color-gold);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--color-silver);
}

.footer-section a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-gold);
  color: var(--color-gray-medium);
}

/* ============================================================
   15. RESPONSIVE DESIGN
   ============================================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  h3 {
    font-size: 1.4rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .row.row-2,
  .row.row-3,
  .row.row-4 {
    grid-template-columns: 1fr;
  }
  
  .navbar {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .nav-link {
    margin: var(--spacing-sm) 0;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.3rem;
  }
  
  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
  }
  
  .section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
}