/* ============================================
   Quantum AI Academy — Global Variables & Reset
   ============================================ */
:root {
  --bg-body: #020617;
  --bg-section: #0b1120;
  --bg-card: rgba(15, 23, 42, 0.55);
  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.35);
  --secondary: #3b82f6;
  --secondary-glow: rgba(59, 130, 246, 0.35);
  --accent: #06b6d4;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: rgba(255, 255, 255, 0.07);
  --radius: 16px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  color: var(--text);
  background-color: var(--bg-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

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

/* ============================================
   Typography & Utilities
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-header {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-dim);
  font-size: 1.05rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Reveal on scroll utility */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, box-shadow 0.3s ease, filter 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #021b16;
  box-shadow: 0 0 0 0 var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 24px 4px var(--primary-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.04);
}

.btn-full {
  width: 100%;
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  z-index: 1000;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

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

.logo-mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.2rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.1;
  color: #fff;
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.main-nav ul {
  display: flex;
  gap: 32px;
}

.main-nav a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.3s ease;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--text);
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.nav-toggle.active .hamburger {
  transform: rotate(45deg);
}

.nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(90deg);
}

.nav-toggle.active .hamburger::after {
  opacity: 0;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(circle at 80% 30%, rgba(16,185,129,0.08), transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(59,130,246,0.08), transparent 50%),
              var(--bg-body);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, rgba(2,6,23,0.7) 0%, rgba(2,6,23,0.3) 50%, rgba(2,6,23,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 0 0 var(--primary-glow);
  animation: pulse-glow 2s infinite;
}

.hero-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  line-height: 1.15;
  margin-bottom: 24px;
  text-wrap: balance;
}

.hero-lead {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto 32px;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.mouse {
  width: 22px;
  height: 34px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 12px;
  position: relative;
}

.wheel {
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 1.8s infinite;
}

/* ============================================
   Systems
   ============================================ */
.systems {
  padding: 96px 0;
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.system-card {
  padding: 32px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.system-card:hover {
  transform: translateY(-8px);
  border-color: rgba(16,185,129,0.3);
  box-shadow: 0 24px 48px rgba(0,0,0,0.5), 0 0 20px rgba(16,185,129,0.08);
}

.system-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(6,182,212,0.15));
  color: var(--primary);
  margin-bottom: 20px;
}

.system-card h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.system-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   About
   ============================================ */
.about {
  padding: 96px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  align-items: center;
  gap: 64px;
}

.about-media {
  position: relative;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  padding: 10px;
}

.media-frame img {
  border-radius: 12px;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.media-decor {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary-glow), transparent 70%);
  filter: blur(20px);
  z-index: -1;
}

.about-content .section-tag {
  margin-bottom: 8px;
}

.about-content .section-title {
  margin-bottom: 20px;
}

.about-content p {
  color: var(--text-dim);
  margin-bottom: 16px;
}

.feature-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 0.95rem;
}

.feature-list svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ============================================
   Programs
   ============================================ */
.programs {
  padding: 96px 0;
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.program-card {
  position: relative;
  padding: 32px;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease;
}

.program-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59,130,246,0.35);
}

.card-number {
  position: absolute;
  top: 18px;
  right: 24px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.08);
  font-weight: 900;
}

.program-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(16,185,129,0.15));
  color: var(--secondary);
  margin-bottom: 20px;
}

.program-card h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.program-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  transition: gap 0.3s ease;
}

.link-arrow:hover {
  gap: 14px;
}

.link-arrow span {
  transition: transform 0.3s ease;
}

.link-arrow:hover span {
  transform: translateX(4px);
}

/* ============================================
   Geo Lab
   ============================================ */
.lab {
  padding: 96px 0;
  background: linear-gradient(180deg, var(--bg-body) 0%, var(--bg-section) 100%);
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.lab-card {
  overflow: hidden;
  transition: transform 0.4s ease;
}

.lab-card:hover {
  transform: translateY(-6px) scale(1.01);
}

.lab-image {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.lab-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.lab-card:hover .lab-image img {
  transform: scale(1.08);
}

.lab-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(2,6,23,0.8) 100%);
}

.lab-content {
  padding: 20px 24px 24px;
}

.lab-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.lab-tags span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(6,182,212,0.1);
  color: var(--accent);
  border: 1px solid rgba(6,182,212,0.15);
}

.lab-content h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.lab-content p {
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* ============================================
   Contact
   ============================================ */
.contact {
  padding: 96px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.info-card:hover {
  transform: translateX(6px);
  border-color: rgba(16,185,129,0.25);
}

.info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(6,182,212,0.12), rgba(59,130,246,0.12));
  color: var(--accent);
}

.info-card h4 {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

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

.info-card a:hover {
  color: var(--primary);
}

.contact-form {
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(2,6,23,0.6);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

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

.form-status {
  margin-top: 12px;
  font-size: 0.9rem;
  min-height: 1.4em;
  color: var(--text-dim);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
}

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

/* ============================================
   Animations
   ============================================ */
@keyframes pulse-glow {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@keyframes scroll-wheel {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ============================================
   Media Queries
   ============================================ */
@media (max-width: 992px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .about-media {
    order: -1;
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: 100%;
    height: calc(100dvh - var(--header-h));
    background: rgba(2,6,23,0.96);
    backdrop-filter: blur(10px);
    transform: translateX(100%);
    transition: transform 0.4s ease;
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 24px;
  }
  .main-nav a {
    display: block;
    padding: 16px 0;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle {
    display: flex;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    width: 100%;
  }
  .lab-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .systems,
  .about,
  .programs,
  .lab,
  .contact {
    padding: 64px 0;
  }
  .system-card,
  .program-card,
  .contact-form {
    padding: 24px;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}