/* ============================================
   ISU Antwerp Clone — Modern CSS
   ============================================ */

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

:root {
  --black: #0a0a0a;
  --white: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --gray-800: #262626;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: var(--font-sans);
  background: var(--black);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 2rem;
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  padding: 1rem 2rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

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

.logo-text {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.tagline {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gray-400);
  font-weight: 300;
}

/* Nav Toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 200;
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 1.5px;
  background: var(--white);
  transition: var(--transition);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ============================================
   MOBILE NAV
   ============================================ */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-slow);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav ul {
  list-style: none;
  text-align: center;
}

.mobile-nav li {
  margin: 1.5rem 0;
  transform: translateY(30px);
  opacity: 0;
  transition: var(--transition);
}

.mobile-nav.open li {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav.open li:nth-child(1) { transition-delay: 0.1s; }
.mobile-nav.open li:nth-child(2) { transition-delay: 0.15s; }
.mobile-nav.open li:nth-child(3) { transition-delay: 0.2s; }
.mobile-nav.open li:nth-child(4) { transition-delay: 0.25s; }
.mobile-nav.open li:nth-child(5) { transition-delay: 0.3s; }
.mobile-nav.open li:nth-child(6) { transition-delay: 0.35s; }

.mobile-nav a {
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  font-weight: 300;
  transition: var(--transition);
  position: relative;
}

.mobile-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--white);
  transition: var(--transition);
  transform: translateX(-50%);
}

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

.mobile-nav .nav-cta {
  display: inline-block;
  border: 1px solid var(--white);
  padding: 0.8rem 2rem;
  margin-top: 1rem;
}

.mobile-nav .nav-cta:hover {
  background: var(--white);
  color: var(--black);
}

/* ============================================
   SIDE NAV (Desktop)
   ============================================ */
.side-nav {
  position: fixed;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
}

.side-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-end;
}

.side-nav a {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--gray-400);
  transition: var(--transition);
  font-weight: 400;
  position: relative;
}

.side-nav a::before {
  content: '';
  position: absolute;
  right: -12px;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gray-600);
  transition: var(--transition);
  transform: translateY(-50%);
}

.side-nav a:hover,
.side-nav a.active {
  color: var(--white);
}

.side-nav a:hover::before,
.side-nav a.active::before {
  background: var(--white);
}

.side-nav .nav-cta {
  border: 1px solid var(--gray-600);
  padding: 0.4rem 1rem;
  margin-top: 0.5rem;
}

.side-nav .nav-cta:hover {
  border-color: var(--white);
}

.side-nav .nav-cta::before {
  display: none;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(40, 40, 40, 0.4) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(30, 30, 30, 0.3) 0%, transparent 50%),
    linear-gradient(180deg, #0d0d0d 0%, #1a1a1a 50%, #0a0a0a 100%);
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 100px,
    rgba(255,255,255,0.015) 100px,
    rgba(255,255,255,0.015) 101px
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  animation: fadeInUp 1.2s var(--transition) forwards;
}

.hero-title {
  margin-bottom: 1rem;
}

.hero-title-line {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(5rem, 15vw, 12rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1;
}

.hero-subtitle {
  display: block;
  font-size: clamp(1rem, 3vw, 1.8rem);
  letter-spacing: 0.8em;
  font-weight: 300;
  color: var(--gray-400);
  margin-top: 0.5rem;
}

.hero-tagline {
  font-size: 0.75rem;
  letter-spacing: 0.5em;
  color: var(--gray-400);
  margin-bottom: 3rem;
  font-weight: 300;
}

.hero-cta {
  display: inline-block;
  border: 1px solid var(--gray-600);
  padding: 1rem 3rem;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  transition: var(--transition);
  font-weight: 400;
}

.hero-cta:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: fadeInUp 1.2s 0.5s var(--transition) both;
}

.scroll-indicator span {
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--gray-600);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gray-600), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   INTRO SECTION
   ============================================ */
.intro-section {
  background: var(--white);
  color: var(--black);
}

.intro-content {
  max-width: 700px;
  margin: 0 auto;
}

.intro-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-weight: 300;
  color: var(--gray-600);
}

.intro-content p:first-child {
  font-size: 1.3rem;
  color: var(--black);
  font-weight: 400;
  line-height: 1.7;
}

/* ============================================
   PRICES SECTION
   ============================================ */
.prices-section {
  background: var(--black);
}

.prices-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--gray-800);
}

.price-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.8rem 2rem;
  border-bottom: 1px solid var(--gray-800);
  transition: var(--transition);
  position: relative;
}

.price-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: var(--gray-800);
  transition: var(--transition);
  z-index: -1;
}

.price-item:hover::before {
  width: 100%;
}

.price-item:nth-child(odd) {
  border-right: 1px solid var(--gray-800);
}

.price-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--gray-400);
  font-weight: 400;
}

.price-value {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.price-item.featured {
  background: var(--gray-800);
}

.prices-note {
  margin-top: 2rem;
  font-size: 0.7rem;
  color: var(--gray-600);
  letter-spacing: 0.1em;
}

/* ============================================
   COLLECTIONS SECTION
   ============================================ */
.collections-section {
  background: var(--white);
  color: var(--black);
  flex-direction: column;
  padding: 8rem 0;
}

.collections-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 2rem;
}

.collections-header h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.collections-tabs {
  display: flex;
  gap: 0.5rem;
}

.collection-tab {
  width: 36px;
  height: 36px;
  border: 1px solid var(--gray-200);
  background: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  transition: var(--transition);
  color: var(--gray-600);
}

.collection-tab.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.collection-tab:hover:not(.active) {
  border-color: var(--black);
}

.collection-info {
  margin-bottom: 3rem;
  max-width: 600px;
}

.collection-info h5 {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  font-weight: 500;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.fragment-list {
  margin: 0 0 1.5rem 1.2rem;
}

.fragment-list li {
  font-size: 0.85rem;
  color: var(--gray-600);
  margin-bottom: 0.3rem;
  font-weight: 300;
}

.collection-info p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--gray-600);
  font-weight: 300;
}

/* Gallery Grid */
.gallery-grid {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.gallery-grid.active {
  display: grid;
}

.gallery-item {
  aspect-ratio: 1;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.gallery-item.large {
  grid-column: span 2;
  aspect-ratio: 2/1;
}

.gallery-placeholder {
  width: 100%;
  height: 100%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--gray-400);
  transition: var(--transition);
}

.gallery-placeholder.alt {
  background: var(--gray-200);
}

.gallery-item:hover .gallery-placeholder {
  background: var(--gray-800);
  color: var(--white);
}

.gallery-item:hover {
  transform: scale(1.02);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
  background: var(--black);
  padding: 8rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
}

.contact-info h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 3rem;
}

.contact-block {
  margin-bottom: 2rem;
}

.contact-block h4 {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gray-600);
  margin-bottom: 0.5rem;
  font-weight: 400;
}

.contact-block p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--gray-400);
}

.contact-address {
  font-size: 1rem !important;
  letter-spacing: 0.1em;
  line-height: 1.8 !important;
  color: var(--white) !important;
}

.contact-note {
  font-size: 0.75rem !important;
  margin-top: 0.5rem;
  font-style: italic;
}

.contact-block a {
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

.contact-block a:hover {
  border-bottom-color: var(--white);
}

.social-links {
  display: flex;
  gap: 2rem;
}

.social-links a {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--gray-400);
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--white);
}

.opening-hours h4 {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hours-grid {
  border-top: 1px solid var(--gray-800);
  margin-bottom: 3rem;
}

.hours-row {
  display: flex;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-800);
  font-size: 0.85rem;
}

.hours-row .day {
  letter-spacing: 0.15em;
  color: var(--gray-400);
  font-weight: 400;
}

.hours-row .time {
  letter-spacing: 0.1em;
}

.hours-row.closed .time {
  color: var(--gray-600);
}

.reservation-btn {
  display: inline-block;
  border: 1px solid var(--gray-600);
  padding: 1rem 3rem;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  transition: var(--transition);
}

.reservation-btn:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--black);
  border-top: 1px solid var(--gray-800);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-inner p {
  font-size: 0.7rem;
  color: var(--gray-600);
  letter-spacing: 0.1em;
}

.footer-credit a {
  transition: var(--transition);
}

.footer-credit a:hover {
  color: var(--white);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .side-nav {
    display: none;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }

  .tagline {
    display: none;
  }

  .hero-title-line {
    font-size: 4rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    letter-spacing: 0.5em;
  }

  .prices-grid {
    grid-template-columns: 1fr;
  }

  .price-item:nth-child(odd) {
    border-right: none;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-item.large {
    grid-column: span 2;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title-line {
    font-size: 3rem;
  }

  .hero-cta {
    padding: 0.8rem 2rem;
    font-size: 0.65rem;
  }

  .price-item {
    padding: 1.2rem 1rem;
  }

  .price-label {
    font-size: 0.65rem;
  }

  .price-value {
    font-size: 0.95rem;
  }
}