/* ===== CSS Variables ===== */
:root {
  --color-bg: #0f1419;
  --color-bg-alt: #1a2332;
  --color-surface: #1e2a3a;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #e8edf4;
  --color-text-muted: #8b9cb3;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-glow: rgba(59, 130, 246, 0.25);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --navbar-height: 72px;
}

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

html {
  scroll-behavior: auto;
  scroll-padding-top: 72px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-accent-hover);
}

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

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
  z-index: 1001;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo-icon {
  height: 1.5em;
  width: auto;
  flex-shrink: 0;
  vertical-align: middle;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  box-shadow: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1002;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  margin: 0;
  transition: none;
  border-radius: 0;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: none;
}

/* 取消圆叉X变形：菜单打开时隐藏按钮，不再显示关闭图标 */
.menu-toggle.active {
  display: none !important;
  visibility: hidden !important;
}

.menu-toggle.active span {
  transform: none !important;
  opacity: 1 !important;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
  transition: all var(--transition);
}

.btn-outline:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.resume-download,
.demo-link {
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff !important;
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.resume-download:hover,
.demo-link:hover {
  background: rgba(59, 130, 246, 0.55);
}

.resume-download:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--navbar-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(59, 130, 246, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero-name {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.4;
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: 24px;
  line-height: 1.7;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-image-wrap {
  position: relative;
  width: 340px;
  height: 420px;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 1;
}

.hero-image-ring {
  position: absolute;
  inset: -12px;
  border: 2px solid var(--color-accent);
  border-radius: calc(var(--radius-lg) + 8px);
  opacity: 0.4;
}

/* ===== Carousel ===== */
.hero-carousel {
  position: relative !important;
  width: 100% !important;
  height: 420px !important;
  overflow: hidden !important;
  border-radius: var(--radius-lg) !important;
}

.hero-carousel img.hero-image {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  opacity: 0 !important;
  visibility: hidden !important;
  transition: opacity 0.8s ease-in-out !important;
  z-index: 1 !important;
  border-radius: var(--radius-lg) !important;
}

.hero-carousel img.hero-image.active {
  opacity: 1 !important;
  visibility: visible !important;
  z-index: 2 !important;
}

.carousel-indicators {
  position: absolute !important;
  bottom: 16px !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  display: flex !important;
  gap: 8px !important;
  z-index: 100 !important;
}

.indicator {
  width: 12px !important;
  height: 12px !important;
  border-radius: 50% !important;
  background: rgba(255, 255, 255, 0.5) !important;
  border: 2px solid rgba(255, 255, 255, 0.8) !important;
  cursor: pointer !important;
  transition: all 0.3s !important;
  padding: 0 !important;
  display: block !important;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3) !important;
}

.indicator.active {
  background: #3b82f6 !important;
  width: 30px !important;
  border-radius: 6px !important;
  border-color: #3b82f6 !important;
}

.indicator:hover {
  background: rgba(255, 255, 255, 0.8) !important;
}

.carousel-btn {
  position: absolute !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  width: 40px !important;
  height: 40px !important;
  border-radius: 8px !important;
  background: rgba(0, 0, 0, 0.5) !important;
  color: white !important;
  border: none !important;
  cursor: pointer !important;
  z-index: 100 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 20px !important;
  transition: background 0.3s !important;
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.7) !important;
}

.carousel-btn.prev {
  left: 10px !important;
}

.carousel-btn.next {
  right: 10px !important;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(6px); }
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
  overflow: hidden;
  position: relative;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-text strong {
  color: var(--color-text);
}

.quick-facts-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.fact-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  transition: border-color var(--transition), transform var(--transition);
}

.fact-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateX(4px);
}

.fact-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.fact-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.fact-card p {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.skill-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.skill-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.skill-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: 56px;
  margin-bottom: 48px;
}

.timeline-marker {
  position: absolute;
  left: 12px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.section-alt .timeline-marker {
  border-color: var(--color-bg-alt);
}

.timeline-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: border-color var(--transition);
}

.timeline-content:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 8px;
}

.timeline-header h3 {
  font-size: 1.2rem;
  font-weight: 600;
}

.timeline-role {
  color: var(--color-accent);
  font-weight: 500;
  font-size: 0.95rem;
}

.timeline-period {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 12px;
  border-radius: 20px;
}

.timeline-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.timeline-list {
  list-style: none;
  padding: 0;
}

.timeline-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

.timeline-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ===== Tech Stack ===== */
.tech-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tech-category {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px 20px;
}

.tech-category h3 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
  text-align: left;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  justify-content: center;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 8px;
  border-radius: 12px;
  transition: transform 0.25s ease, background 0.25s ease;
  box-sizing: border-box;
}

.tech-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.04);
}

.tech-logo {
  width: 48px;
  height: 48px;
  display: block;
  transition: transform 0.25s ease;
}

.tech-item:hover .tech-logo {
  transform: scale(1.15);
}

.tech-item > span:last-child {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.2;
}

@media (max-width: 900px) {
  .tech-categories {
    grid-template-columns: repeat(2, 1fr);
  }
  .tech-item {
    flex: 0 0 calc((100% - 16px) / 2);
  }
}
@media (max-width: 600px) {
  .tech-categories {
    grid-template-columns: 1fr;
  }
  .tech-item {
    flex: 0 0 100%;
  }
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr;
  justify-items: center;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 400px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 400px;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
  align-items: center;
}

.contact-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

.contact-icon {
  font-size: 1.5rem;
}

.contact-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.contact-card a,
.contact-card p {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ===== Footer ===== */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  text-align: center;
}

.footer-brand h3 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.footer-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.footer-tags span {
  padding: 6px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== GSAP initial states ===== */
.animate-item {
  will-change: transform, opacity;
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-location {
    justify-content: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-image-wrap {
    width: 280px;
    height: 350px;
  }

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

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

  .tech-categories {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    gap: 4px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 0.82rem;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 20, 25, 0.98);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    padding: 14px 16px;
    width: 100%;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .menu-toggle {
    display: flex;
  }
}

@media (max-width: 640px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .timeline-header {
    flex-direction: column;
  }

  .section {
    padding: 72px 0;
  }

  .scroll-indicator {
    display: none;
  }

  .contact-info {
    width: 100%;
    max-width: none;
  }

  .contact-form {
    width: 100%;
    max-width: none;
  }

  .contact-card {
    padding: 16px;
  }

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

  .video-lightbox {
    padding: 16px;
  }

  .demo-card {
    padding: 20px;
  }
}

/* ===== Demos Grid ===== */
.demos-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .demos-grid {
    grid-template-columns: 1fr;
  }
}

.demo-card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

/* 修复: demo-card 内的 tech-item 样式 - 图标居中 */
.demo-card .tech-item {
  align-self: center;
  flex: 0 0 auto;
  width: auto;
  min-width: 80px;
}

.demo-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.demo-card > h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.demo-card > p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.demo-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
}

.demo-icon i {
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

.demo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.demo-tags span {
  padding: 4px 12px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== Gallery ===== */
.gallery-container {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.gallery-loading {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 20px 0;
}

/* ===== Video Grid ===== */
.video-container {
  margin-top: 24px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}

.video-item {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), transform var(--transition);
}

.video-item:hover {
  border-color: var(--color-accent);
  transform: scale(1.05);
  z-index: 1;
}

.video-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  display: block;
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  font-size: 3rem;
  color: white;
  opacity: 0;
  transition: opacity var(--transition);
}

.video-item:hover .video-play-overlay {
  opacity: 1;
}

.video-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: white;
  font-size: 0.85rem;
}

.video-section-title {
  text-align: center;
  margin: 32px 0 16px;
  font-size: 1.1rem;
}

.video-section {
  margin-top: 24px;
}

/* ===== Gallery Grid ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-width: 720px;
  margin: 0 auto;
  justify-content: center;
}

@media (max-width: 640px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 100%;
  }
}

.gallery-item {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), transform var(--transition);
}

.gallery-item:hover {
  border-color: var(--color-accent);
  transform: scale(1.05);
  z-index: 1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-count {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.active {
  display: flex;
}

.video-lightbox.active {
  display: flex !important;
}

.lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(4px);
}

.lightbox-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  animation: lightboxFadeIn 0.3s ease;
}

@keyframes lightboxFadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  font-size: 24px;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* ===== Video Lightbox ===== */
.video-lightbox {
  display: none;
  align-items: center;
  justify-content: center;
}

.video-lightbox.active {
  display: flex;
}

.video-lightbox-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.video-lightbox-player {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  background: #000;
}

.video-lightbox-title {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  text-align: center;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  font-size: 28px;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
  left: 24px;
}

.lightbox-next {
  right: 24px;
}

.lightbox-counter {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px 16px;
  border-radius: 20px;
  z-index: 2;
}

@media (max-width: 640px) {
  .lightbox {
    padding: 20px;
  }

  .lightbox-nav {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }

  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-close {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
}