/* ============================================
   DIGITAL MUSEUM - MAIN STYLES
   ============================================ */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #c9a227;
  --accent-hover: #d4af37;
  --text-light: #f5f5f5;
  --text-muted: #a0a0a0;
  --bg-dark: #0f0f1a;
  --bg-card: #1e1e3a;
  --border: #2a2a4a;
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #0f0f1a 100%);
  --gradient-gold: linear-gradient(135deg, #c9a227 0%, #d4af37 50%, #c9a227 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 30, 58, 0.9) 0%, rgba(15, 15, 26, 0.95) 100%);
  
  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --section-padding: 100px;
  --container-max: 1400px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s ease;
  --transition-slow: 0.6s ease;
  
  /* Shadows */
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 20px 60px rgba(201, 162, 39, 0.2);
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

.lenis.lenis-scrolling iframe {
  pointer-events: none;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

.section-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--text-light);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--gradient-gold);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 600px;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header .section-title::after {
  left: 50%;
  transform: translateX(-50%);
}

.section-header .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-medium);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(20px);
  padding: 15px 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 45px;
  height: 45px;
  background: var(--gradient-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
}

.logo-text span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 35px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  position: relative;
  padding: 5px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-medium);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 2px;
  background: var(--text-light);
  transition: all var(--transition-fast);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--transition-medium);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-gold);
  color: var(--primary);
  border: 2px solid transparent;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text-light);
  border: 2px solid var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--text-light);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--primary);
  padding: 80px 0 30px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 50px;
  margin-bottom: 50px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 25px;
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-3px);
}

.footer-column h4 {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 10px;
}

.footer-column h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column ul li a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.footer-column ul li a:hover {
  color: var(--accent);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-bottom-links {
  display: flex;
  gap: 30px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-bottom-links a:hover {
  color: var(--accent);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-gradient {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-card {
  background: rgba(30, 30, 58, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .nav-links {
    gap: 25px;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 350px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    padding: 100px 40px;
    gap: 25px;
    transition: right var(--transition-medium);
    z-index: 999;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links a {
    font-size: 1.1rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   LOADING SCREEN
   ============================================ */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

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

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 20px;
}

.loading-text {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--accent);
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-gold);
  z-index: 1001;
  transform-origin: left;
}