:root {
  /* Pure Monochrome Colors */
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1e1e1e;
  --text-primary: #ffffff;
  --text-secondary: #666666;
  --text-muted: #333333;
  --border: #333333;
  --border-light: #444444;

  /* Optional Dark Accent (barely noticeable) */
  --accent: #1a1f2e;
  --accent-hover: #2d3748;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f8f8;
  --bg-tertiary: #eeeeee;
  --text-primary: #000000;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #cccccc;
  --border-light: #e0e0e0;

  /* Optional Light Accent */
  --accent: #f0f0f0;
  --accent-hover: #e8e8e8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: all 0.3s ease;
  text-transform: lowercase;
  font-weight: 500;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

button, input, textarea, select {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.container {
  max-width: min(70vw, 1200px);
  margin: 0 auto;
  padding: 0 20px;
}

.theme-toggle {
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 1000;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-primary);
}

.theme-toggle:hover {
  background: var(--accent);
  border-color: var(--border-light);
}

.theme-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

main {
  min-height: 100vh;
}

/* Marquee */
.marquee {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  white-space: nowrap;
  padding: 0.75rem 0;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.marquee-content {
  display: inline-block;
  animation: marquee 60s linear infinite;
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* Hero Section */
.hero {
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.hero-signature {
  max-width: 800px;
  width: 100%;
  height: auto;
  margin: 0 0 2rem 0;
  filter: var(--signature-filter, invert(0));
  user-select: auto;
  -webkit-user-select: auto;
  -moz-user-select: auto;
  -ms-user-select: auto;
  pointer-events: auto;
}

[data-theme="light"] {
  --signature-filter: invert(1);
}

@media (max-width: 768px) {
  .hero-signature {
    max-width: 320px;
  }
}

/* Social Links */
.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: all 0.3s ease;
  user-select: auto;
  -webkit-user-select: auto;
  -moz-user-select: auto;
  -ms-user-select: auto;
  pointer-events: auto;
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
  background: var(--bg-secondary);
}

.social-link svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

/* Work Section */
.work {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  text-align: center;
  font-weight: 700;
  color: var(--text-primary);
  user-select: auto;
  -webkit-user-select: auto;
  -moz-user-select: auto;
  -ms-user-select: auto;
  pointer-events: auto;
}

/* Tab Navigation */
.tab-nav {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 3rem;
  background: transparent;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 0.75rem 2rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  font-weight: 600;
  position: relative;
  text-transform: lowercase;
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  user-select: auto;
  -webkit-user-select: auto;
  -moz-user-select: auto;
  -ms-user-select: auto;
  pointer-events: auto;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--text-primary);
}

.tab-btn.active::after {
  width: 100%;
}

/* Photo Grid */
.photo-grid {
  margin-top: 2rem;
  width: 100%;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.cover-photo-item {
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--bg-secondary);
  position: relative;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  flex-shrink: 0;
  perspective: 1000px;
}


.cover-photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s ease;
  pointer-events: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
}

.cover-photo-item:hover img {
  opacity: 0.9;
}

.cover-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  padding: 1rem 0.5rem 0.5rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cover-photo-item:hover .cover-overlay {
  opacity: 1;
}

.photo-count {
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  display: block;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 4rem 0;
  font-style: italic;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.lightbox-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.lightbox-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 6rem;
}

.lightbox-close {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: transparent;
  border: none;
  color: white;
  font-size: 3rem;
  cursor: pointer;
  z-index: 2001;
  transition: opacity 0.3s ease;
  opacity: 0.7;
  font-weight: 300;
  line-height: 1;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-prev,
.lightbox-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: white;
  font-size: 4rem;
  cursor: pointer;
  z-index: 2001;
  transition: opacity 0.3s ease;
  font-weight: 300;
  line-height: 1;
  opacity: 0.7;
  padding: 1rem;
}

.lightbox-prev {
  left: 2rem;
}

.lightbox-next {
  right: 2rem;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
}

.lightbox-header {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2001;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.lightbox-title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.lightbox-counter {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.lightbox-image-container {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
}

/* Booking Section */
.booking {
  padding: 6rem 0;
  background: var(--bg-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.session-nav {
  display: flex;
  gap: 1rem;
  margin: 0 auto 3rem;
  max-width: 900px;
  position: relative;
}

.session-btn {
  flex: 1;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.session-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.session-btn:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.session-btn:hover::before {
  opacity: 1;
}

.session-btn.active {
  background: var(--bg-tertiary);
  border-color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.session-btn.active::before {
  opacity: 1;
}

.session-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}

.session-details {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.5rem;
}

.session-price {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

.booking .section-title {
  margin-bottom: 1rem;
}

.booking p {
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1.1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
  font-style: italic;
}

.booking-widget {
  width: 100%;
  max-width: none;
  margin: 0 auto;
}

.booking .container {
  max-width: 60vw;
}

@media (max-width: 768px) {
  .booking .container {
    max-width: 90vw;
  }
}

.booking-placeholder {
  background: var(--bg-primary);
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 3rem 2rem;
  color: var(--text-secondary);
  text-align: left;
}

.booking-placeholder h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-align: center;
}

.booking-placeholder ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.booking-placeholder li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.booking-placeholder a {
  color: var(--text-primary);
  text-decoration: underline;
}

.booking-placeholder a:hover {
  color: var(--border-light);
}

/* About Section */
.about {
  padding: 6rem 0;
}

.about .section-title {
  margin-bottom: 3rem;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
  line-height: 1.8;
  font-weight: 400;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .container {
    max-width: 90vw;
    padding: 0 15px;
  }

  .theme-toggle {
    top: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
    font-size: 1.1rem;
  }

  .hero {
    padding: 2rem 0;
  }

  .tab-nav {
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
  }

  .tab-btn {
    padding: 0.5rem 1rem;
  }

  .tab-content.active {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    max-width: 100%;
  }

  .lightbox-content {
    padding: 2rem 1rem;
  }

  .lightbox-header {
    top: 1rem;
  }

  .lightbox-title {
    font-size: 1rem;
  }

  .lightbox-counter {
    font-size: 0.8rem;
  }

  .lightbox-close {
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
  }

  .lightbox-prev,
  .lightbox-next {
    font-size: 2.5rem;
    padding: 0.5rem;
  }

  .lightbox-prev {
    left: 0.5rem;
  }

  .lightbox-next {
    right: 0.5rem;
  }

  .lightbox-image {
    max-height: 80vh;
  }

  .session-nav {
    flex-direction: column;
    gap: 0.75rem;
  }

  .session-btn {
    padding: 1.5rem;
  }

  .booking,
  .about {
    padding: 4rem 0;
  }

  .booking h2,
  .about h2 {
    font-size: 2rem;
  }
}