/* ===== DARK ACADEMIA DESIGN SYSTEM ===== */

/* Import Google Fonts for Dark Academia aesthetic */
@import url('https://fonts.googleapis.com/css2?family=Crimson+Text:ital,wght@0,400;0,600;1,400;1,600&family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500;1,600;1,700&display=swap');

/* ===== CSS VARIABLES - DARK ACADEMIA PALETTE ===== */
:root {
  /* Primary Dark Academia Colors */
  --da-midnight: #0f0f23;
  --da-charcoal: #1a1a2e;
  --da-slate: #16213e;
  --da-deep-blue: #0f4c75;
  --da-navy: #1e2a4a;
  
  /* Accent Colors */
  --da-gold: #d4af37;
  --da-brass: #b5973f;
  --da-amber: #ffbf00;
  --da-cognac: #8b4513;
  --da-burgundy: #800020;
  
  /* Text Colors */
  --da-text-primary: #f8f9fa;
  --da-text-secondary: #e9ecef;
  --da-text-muted: #adb5bd;
  --da-text-accent: #d4af37;
  
  /* Background Colors */
  --da-bg-primary: #0f0f23;
  --da-bg-secondary: #1a1a2e;
  --da-bg-tertiary: #16213e;
  --da-bg-card: rgba(26, 26, 46, 0.8);
  --da-bg-overlay: rgba(15, 15, 35, 0.95);
  
  /* Border Colors */
  --da-border-light: rgba(212, 175, 55, 0.2);
  --da-border-medium: rgba(212, 175, 55, 0.4);
  --da-border-heavy: rgba(212, 175, 55, 0.6);
  
  /* Shadows */
  --da-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --da-shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --da-shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
  --da-shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.6);
  
  /* Typography Scale */
  --da-text-xs: 0.75rem;
  --da-text-sm: 0.875rem;
  --da-text-base: 1rem;
  --da-text-lg: 1.125rem;
  --da-text-xl: 1.25rem;
  --da-text-2xl: 1.5rem;
  --da-text-3xl: 1.875rem;
  --da-text-4xl: 2.25rem;
  --da-text-5xl: 3rem;
  --da-text-6xl: 3.75rem;
  --da-text-7xl: 4.5rem;
  --da-text-8xl: 6rem;
  
  /* Spacing Scale */
  --da-space-1: 0.25rem;
  --da-space-2: 0.5rem;
  --da-space-3: 0.75rem;
  --da-space-4: 1rem;
  --da-space-5: 1.25rem;
  --da-space-6: 1.5rem;
  --da-space-8: 2rem;
  --da-space-10: 2.5rem;
  --da-space-12: 3rem;
  --da-space-16: 4rem;
  --da-space-20: 5rem;
  --da-space-24: 6rem;
  --da-space-32: 8rem;
  
  /* Border Radius */
  --da-radius-sm: 0.125rem;
  --da-radius-md: 0.375rem;
  --da-radius-lg: 0.5rem;
  --da-radius-xl: 0.75rem;
  --da-radius-2xl: 1rem;
  --da-radius-full: 9999px;
  
  /* Transitions */
  --da-transition-fast: 150ms ease-in-out;
  --da-transition-medium: 250ms ease-in-out;
  --da-transition-slow: 350ms ease-in-out;
  
  /* Z-Index Scale */
  --da-z-dropdown: 1000;
  --da-z-sticky: 1020;
  --da-z-fixed: 1030;
  --da-z-modal-backdrop: 1040;
  --da-z-modal: 1050;
  --da-z-popover: 1060;
  --da-z-tooltip: 1070;
}

/* ===== TYPOGRAPHY SYSTEM ===== */
.da-font-serif {
  font-family: 'Playfair Display', 'Crimson Text', Georgia, serif;
}

.da-font-serif-body {
  font-family: 'Crimson Text', Georgia, serif;
}

.da-font-sans {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Heading Styles */
.da-heading-1 {
  font-family: 'Playfair Display', serif;
  font-size: var(--da-text-8xl);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--da-text-primary);
}

.da-heading-2 {
  font-family: 'Playfair Display', serif;
  font-size: var(--da-text-6xl);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--da-text-primary);
}

.da-heading-3 {
  font-family: 'Playfair Display', serif;
  font-size: var(--da-text-4xl);
  font-weight: 600;
  line-height: 1.25;
  color: var(--da-text-primary);
}

.da-heading-4 {
  font-family: 'Playfair Display', serif;
  font-size: var(--da-text-2xl);
  font-weight: 500;
  line-height: 1.3;
  color: var(--da-text-primary);
}

.da-heading-5 {
  font-family: 'Inter', sans-serif;
  font-size: var(--da-text-lg);
  font-weight: 600;
  line-height: 1.4;
  color: var(--da-text-primary);
}

/* Body Text Styles */
.da-body-large {
  font-family: 'Crimson Text', serif;
  font-size: var(--da-text-xl);
  line-height: 1.6;
  color: var(--da-text-secondary);
}

.da-body-regular {
  font-family: 'Inter', sans-serif;
  font-size: var(--da-text-base);
  line-height: 1.6;
  color: var(--da-text-secondary);
}

.da-body-small {
  font-family: 'Inter', sans-serif;
  font-size: var(--da-text-sm);
  line-height: 1.5;
  color: var(--da-text-muted);
}

/* Accent Text */
.da-text-accent {
  color: var(--da-text-accent);
}

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

/* ===== BUTTON SYSTEM ===== */
.da-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--da-space-3) var(--da-space-6);
  border: none;
  border-radius: var(--da-radius-md);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--da-transition-medium);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.da-btn:focus {
  outline: 2px solid var(--da-gold);
  outline-offset: 2px;
}

.da-btn-primary {
  background: linear-gradient(135deg, var(--da-gold), var(--da-brass));
  color: var(--da-midnight);
  border: 1px solid var(--da-gold);
}

.da-btn-primary:hover {
  background: linear-gradient(135deg, var(--da-brass), var(--da-gold));
  transform: translateY(-1px);
  box-shadow: var(--da-shadow-md);
}

.da-btn-secondary {
  background: transparent;
  color: var(--da-text-primary);
  border: 1px solid var(--da-border-medium);
}

.da-btn-secondary:hover {
  background: var(--da-bg-tertiary);
  border-color: var(--da-border-heavy);
}

.da-btn-ghost {
  background: transparent;
  color: var(--da-text-accent);
  border: 1px solid transparent;
}

.da-btn-ghost:hover {
  background: rgba(212, 175, 55, 0.1);
  border-color: var(--da-border-light);
}

/* Button Sizes */
.da-btn-sm {
  padding: var(--da-space-2) var(--da-space-4);
  font-size: var(--da-text-sm);
}

.da-btn-lg {
  padding: var(--da-space-4) var(--da-space-8);
  font-size: var(--da-text-lg);
}

.da-btn-xl {
  padding: var(--da-space-6) var(--da-space-12);
  font-size: var(--da-text-xl);
}

/* ===== CARD SYSTEM ===== */
.da-card {
  background: var(--da-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--da-border-light);
  border-radius: var(--da-radius-xl);
  padding: var(--da-space-6);
  transition: all var(--da-transition-medium);
  position: relative;
}

.da-card:hover {
  border-color: var(--da-border-medium);
  box-shadow: var(--da-shadow-lg);
  transform: translateY(-2px);
}

.da-card-elevated {
  box-shadow: var(--da-shadow-md);
}

.da-card-elevated:hover {
  box-shadow: var(--da-shadow-xl);
}

/* ===== NAVIGATION SYSTEM ===== */
.da-nav {
  background: var(--da-bg-overlay);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--da-border-light);
}

.da-nav-link {
  color: var(--da-text-secondary);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  transition: color var(--da-transition-fast);
  position: relative;
}

.da-nav-link:hover {
  color: var(--da-text-accent);
}

.da-nav-link.active {
  color: var(--da-text-accent);
}

.da-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--da-gold);
}

/* ===== FORM SYSTEM ===== */
.da-form-group {
  margin-bottom: var(--da-space-6);
}

.da-label {
  display: block;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  color: var(--da-text-primary);
  margin-bottom: var(--da-space-2);
}

.da-input {
  width: 100%;
  padding: var(--da-space-3);
  background: var(--da-bg-tertiary);
  border: 1px solid var(--da-border-light);
  border-radius: var(--da-radius-md);
  color: var(--da-text-primary);
  font-family: 'Inter', sans-serif;
  transition: all var(--da-transition-fast);
}

.da-input:focus {
  outline: none;
  border-color: var(--da-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

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

.da-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23d4af37' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

/* ===== UTILITY CLASSES ===== */
.da-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--da-space-4);
}

.da-container-fluid {
  width: 100%;
  padding: 0 var(--da-space-4);
}

.da-text-center { text-align: center; }
.da-text-left { text-align: left; }
.da-text-right { text-align: right; }

.da-flex { display: flex; }
.da-flex-col { flex-direction: column; }
.da-items-center { align-items: center; }
.da-justify-center { justify-content: center; }
.da-justify-between { justify-content: space-between; }
.da-gap-4 { gap: var(--da-space-4); }
.da-gap-6 { gap: var(--da-space-6); }
.da-gap-8 { gap: var(--da-space-8); }

.da-grid { display: grid; }
.da-grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.da-grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.da-grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.da-w-full { width: 100%; }
.da-h-screen { height: 100vh; }
.da-min-h-screen { min-height: 100vh; }

.da-relative { position: relative; }
.da-absolute { position: absolute; }
.da-fixed { position: fixed; }
.da-sticky { position: sticky; }

.da-hidden { display: none; }
.da-block { display: block; }
.da-inline-block { display: inline-block; }

/* Spacing utilities */
.da-p-4 { padding: var(--da-space-4); }
.da-p-6 { padding: var(--da-space-6); }
.da-p-8 { padding: var(--da-space-8); }
.da-py-4 { padding-top: var(--da-space-4); padding-bottom: var(--da-space-4); }
.da-py-8 { padding-top: var(--da-space-8); padding-bottom: var(--da-space-8); }
.da-py-12 { padding-top: var(--da-space-12); padding-bottom: var(--da-space-12); }
.da-py-20 { padding-top: var(--da-space-20); padding-bottom: var(--da-space-20); }

.da-mt-4 { margin-top: var(--da-space-4); }
.da-mt-6 { margin-top: var(--da-space-6); }
.da-mt-8 { margin-top: var(--da-space-8); }
.da-mb-4 { margin-bottom: var(--da-space-4); }
.da-mb-6 { margin-bottom: var(--da-space-6); }
.da-mb-8 { margin-bottom: var(--da-space-8); }

/* ===== ANIMATIONS ===== */
@keyframes da-fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes da-slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes da-scale-in {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.da-animate-fade-in {
  animation: da-fade-in 0.6s ease-out;
}

.da-animate-slide-up {
  animation: da-slide-up 0.5s ease-out;
}

.da-animate-scale-in {
  animation: da-scale-in 0.4s ease-out;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .da-heading-1 { font-size: var(--da-text-5xl); }
  .da-heading-2 { font-size: var(--da-text-4xl); }
  .da-heading-3 { font-size: var(--da-text-3xl); }
  
  .da-grid-cols-2, .da-grid-cols-3, .da-grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .da-container {
    padding: 0 var(--da-space-2);
  }
}

@media (max-width: 640px) {
  .da-btn-xl {
    padding: var(--da-space-4) var(--da-space-6);
    font-size: var(--da-text-lg);
  }
}

/* ===== PARALLAX SUPPORT ===== */
.da-parallax {
  position: relative;
  overflow: hidden;
}

.da-parallax-element {
  transition: transform 0.1s linear;
  will-change: transform;
}

/* ===== SCROLL EFFECTS ===== */
.da-scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.da-scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}