/* ============================================
   OHM LOUNGE — Portfolio Case Study
   Designer: Richard B. Jamison
   ============================================ */

*, ::before, ::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 62.5%; scroll-behavior: smooth; }
body {
  font-family: 'Rubik', sans-serif;
  background: #080808;
  color: #fff;
  font-size: 1.6rem;
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; }

:root {
  --gold: #c8a96e;
  --gold-light: #e2c98a;
  --dark: #080808;
  --dark-2: #101010;
  --dark-3: #181818;
  --dark-4: #222222;
  --text-muted: #777;
  --border: rgba(255,255,255,0.07);
}

.container {
  max-width: 134rem;
  margin: 0 auto;
  padding: 0 4rem;
}

/* ============ NAV ============ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  padding: 2.8rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.4s ease;
}
.site-nav.scrolled {
  padding: 1.8rem 4rem;
  background: rgba(8,8,8,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.9rem;
  letter-spacing: 0.05em;
  color: var(--gold);
}
.nav-back {
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 0.9rem 2.2rem;
  transition: all 0.3s;
}
.nav-back:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ============ HERO ============ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 72rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center 30%;
  transform: scale(1.06);
  transition: transform 10s ease;
  filter: brightness(0.38);
}
.hero:hover .hero-bg { transform: scale(1.0); }

.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(8,8,8,0.15) 0%,
    rgba(8,8,8,0.35) 50%,
    rgba(8,8,8,1) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 2rem;
}
.hero-eyebrow {
  font-size: 1.1rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2.8rem;
  opacity: 0;
  animation: fadeUp 1s 0.3s forwards;
}
.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(7rem, 13vw, 16rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 0.9;
  margin-bottom: 2.4rem;
  opacity: 0;
  animation: fadeUp 1s 0.5s forwards;
}
.hero-title span {
  display: block;
  color: var(--gold);
}
.hero-subtitle {
  font-size: 1.7rem;
  font-weight: 300;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: fadeUp 1s 0.7s forwards;
}
.hero-divider {
  width: 6rem;
  height: 1px;
  background: var(--gold);
  margin: 2.4rem auto;
  opacity: 0;
  animation: fadeUp 1s 0.9s forwards;
}
.hero-meta {
  font-size: 1.2rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 7rem;
  opacity: 0;
  animation: fadeUp 1s 1.1s forwards;
}
.hero-scroll-cue {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  animation: fadeUp 1s 1.4s forwards;
}
.hero-scroll-cue span {
  font-size: 1rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}
.scroll-line {
  width: 1px;
  height: 5.6rem;
  background: linear-gradient(to bottom, rgba(200,169,110,0.7), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.5; transform: scaleY(1); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(0.85); transform-origin: top; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(2.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ OVERVIEW ============ */
.overview {
  padding: 12rem 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.overview::before {
  content: 'OHM';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Playfair Display', serif;
  font-size: 28rem;
  font-weight: 700;
  color: rgba(255,255,255,0.015);
  pointer-events: none;
  letter-spacing: -0.05em;
  white-space: nowrap;
}
.overview-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10rem;
  align-items: center;
  position: relative;
}
.overview-label {
  font-size: 1rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2rem;
  display: block;
}
.overview-heading {
  font-family: 'Playfair Display', serif;
  font-size: 5rem;
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 3rem;
}
.overview-body {
  font-size: 1.7rem;
  line-height: 1.9;
  color: rgba(255,255,255,0.6);
  margin-bottom: 1.8rem;
}
.overview-role {
  display: inline-block;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  border-top: 1px solid var(--gold);
  padding-top: 1.2rem;
  margin-top: 1.2rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}
.stat-box {
  background: var(--dark-2);
  border: 1px solid var(--border);
  padding: 3.6rem 3.2rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}
.stat-box:hover { border-color: rgba(200,169,110,0.3); }
.stat-box::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 4rem;
  height: 2px;
  background: var(--gold);
  transition: width 0.4s ease;
}
.stat-box:hover::after { width: 100%; }
.stat-number {
  font-family: 'Playfair Display', serif;
  font-size: 6.4rem;
  color: var(--gold);
  line-height: 1;
  display: block;
  margin-bottom: 0.8rem;
}
.stat-label {
  font-size: 1.1rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ============ SECTION HEADER ============ */
.section-header {
  text-align: center;
  margin-bottom: 7rem;
}
.section-tag {
  display: inline-block;
  font-size: 1rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.8rem;
}
.section-tag::before, .section-tag::after {
  content: '—';
  margin: 0 1rem;
  opacity: 0.5;
}
.section-heading {
  font-family: 'Playfair Display', serif;
  font-size: 5.6rem;
  font-weight: 400;
  line-height: 1;
}
.section-subhead {
  font-size: 1.5rem;
  color: var(--text-muted);
  margin-top: 1.6rem;
  letter-spacing: 0.05em;
}

/* ============ TRANSFORMATION ============ */
.transformation {
  padding: 12rem 0;
  border-bottom: 1px solid var(--border);
}
.tab-row {
  display: flex;
  justify-content: center;
  margin-bottom: 5rem;
  gap: 0;
}
.tab-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1.2rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  padding: 1.4rem 4.8rem;
  cursor: pointer;
  transition: all 0.3s;
}
.tab-btn:first-child { border-right: none; }
.tab-btn.active {
  background: var(--gold);
  color: #000;
  border-color: var(--gold);
  font-weight: 500;
}
.tab-btn:not(.active):hover {
  color: var(--gold);
  border-color: rgba(200,169,110,0.4);
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 24rem;
  gap: 0.5rem;
}
.photo-grid.hidden { display: none; }

.photo-item {
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background: var(--dark-3);
}
.photo-item:nth-child(6n+1) { grid-row: span 2; }
.photo-item:nth-child(9n+4) { grid-column: span 2; }

.photo-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.7s ease, filter 0.4s;
  filter: brightness(0.8) saturate(0.9);
}
.photo-item:hover img {
  transform: scale(1.1);
  filter: brightness(1) saturate(1.1);
}
.photo-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent 50%);
  opacity: 0;
  transition: opacity 0.35s;
  display: flex;
  align-items: flex-end;
  padding: 1.8rem;
}
.photo-item:hover .photo-overlay { opacity: 1; }
.photo-num-label {
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
}

/* ============ EVENTS ============ */
.events-section {
  padding: 12rem 0;
  background: var(--dark-2);
  border-bottom: 1px solid var(--border);
}
.events-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.event-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--dark-3);
  aspect-ratio: 3/2;
}
.event-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.7s ease, filter 0.4s;
  filter: brightness(0.65) saturate(0.8);
}
.event-card:hover img {
  transform: scale(1.08);
  filter: brightness(0.85) saturate(1);
}
.event-info {
  position: absolute; inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2.8rem;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.88) 0%,
    rgba(0,0,0,0.3) 50%,
    transparent 100%
  );
}
.event-type {
  font-size: 0.95rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.7rem;
  transform: translateY(0.8rem);
  opacity: 0;
  transition: all 0.35s ease;
}
.event-card:hover .event-type {
  transform: translateY(0);
  opacity: 1;
}
.event-name {
  font-family: 'Playfair Display', serif;
  font-size: 2.4rem;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.6rem;
}
.event-date {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.1em;
}

/* Upload placeholder card */
.event-upload {
  border: 2px dashed rgba(200,169,110,0.2);
  background: rgba(200,169,110,0.02);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 3rem;
  aspect-ratio: 3/2;
  cursor: default;
  transition: border-color 0.3s;
}
.event-upload:hover { border-color: rgba(200,169,110,0.4); }
.upload-icon {
  font-size: 3.2rem;
  color: rgba(200,169,110,0.3);
  margin-bottom: 1.6rem;
  display: block;
  line-height: 1;
}
.upload-label {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.1em;
  margin-bottom: 0.6rem;
  opacity: 0.7;
}
.upload-sub {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============ LIGHTBOX ============ */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.96);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.lightbox.open {
  opacity: 1;
  pointer-events: all;
}
.lb-img {
  max-width: 88vw;
  max-height: 82vh;
  object-fit: contain;
  width: auto;
  height: auto;
  display: block;
  transition: opacity 0.25s;
}
.lb-close {
  position: absolute;
  top: 2.4rem; right: 3.2rem;
  background: none; border: none;
  color: rgba(255,255,255,0.5);
  font-size: 3.6rem;
  cursor: pointer;
  transition: color 0.2s;
  line-height: 1;
}
.lb-close:hover { color: var(--gold); }
.lb-prev, .lb-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: rgba(255,255,255,0.5);
  font-size: 3.2rem;
  padding: 1.4rem 1.8rem;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1;
}
.lb-prev { left: 2.4rem; }
.lb-next { right: 2.4rem; }
.lb-prev:hover, .lb-next:hover {
  color: var(--gold);
  border-color: rgba(200,169,110,0.4);
  background: rgba(200,169,110,0.05);
}
.lb-caption {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  white-space: nowrap;
}
.lb-counter {
  position: absolute;
  bottom: 3rem;
  right: 4rem;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.25);
}

/* ============ FOOTER ============ */
.site-footer {
  padding: 10rem 0 6rem;
  text-align: center;
  position: relative;
}
.footer-venue {
  font-family: 'Playfair Display', serif;
  font-size: 5.6rem;
  font-weight: 400;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 1.4rem;
}
.footer-tagline {
  font-size: 1.4rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}
.footer-dates {
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
  margin-bottom: 5rem;
}
.footer-divider {
  width: 8rem;
  height: 1px;
  background: var(--border);
  margin: 0 auto 4rem;
}
.footer-back-btn {
  display: inline-block;
  font-size: 1.1rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 1.4rem 3.6rem;
  transition: all 0.3s;
}
.footer-back-btn:hover {
  color: var(--gold);
  border-color: rgba(200,169,110,0.5);
}
.footer-credit {
  margin-top: 6rem;
  font-size: 1.1rem;
  color: rgba(255,255,255,0.12);
  letter-spacing: 0.1em;
}

/* ============ SCROLL REVEAL ============ */
.reveal {
  opacity: 0;
  transform: translateY(3.2rem);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1200px) {
  .photo-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
  .overview-inner { grid-template-columns: 1fr; gap: 6rem; }
  .events-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading { font-size: 4.4rem; }
}
@media (max-width: 768px) {
  .container { padding: 0 2.4rem; }
  .hero-title { font-size: clamp(5.5rem, 16vw, 10rem); }
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 18rem;
  }
  .photo-item:nth-child(6n+1) { grid-row: span 1; }
  .photo-item:nth-child(9n+4) { grid-column: span 1; }
  .events-grid { grid-template-columns: 1fr; }
  .site-nav { padding: 1.6rem 2.4rem; }
  .site-nav.scrolled { padding: 1.4rem 2.4rem; }
  .overview { padding: 8rem 0; }
  .transformation, .events-section { padding: 8rem 0; }
  .section-heading { font-size: 3.6rem; }
  .overview-heading { font-size: 3.6rem; }
  .footer-venue { font-size: 4rem; }
  .lb-prev { left: 0.8rem; }
  .lb-next { right: 0.8rem; }
}