/* ═══════════════════════════════════════════
   Open Studio — Landing Page Styles
   ═══════════════════════════════════════════ */

:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a26;
  --border: rgba(255, 255, 255, 0.06);
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;

  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.3);

  --gradient-1: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
  --gradient-2: linear-gradient(135deg, #3b82f6, #6366f1);

  --cours-color: #f59e0b;
  --drive-color: #3b82f6;
  --localai-color: #10b981;
  --power-color: #ef4444;

  --radius: 16px;
  --radius-sm: 10px;
  --nav-height: 72px;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══════════ NAV ═══════════ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, box-shadow 0.3s;
}

#navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.2rem;
}

.nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ═══════════ HERO ═══════════ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 60px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(168, 85, 247, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 20% 50%, rgba(59, 130, 246, 0.08), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title-line {
  display: block;
}

.gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 6px 30px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.hero-banner {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border);
}

.hero-banner img {
  width: 100%;
  display: block;
}

/* ═══════════ SECTIONS ═══════════ */
section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* ═══════════ FEATURES ═══════════ */
#features {
  background: linear-gradient(180deg, var(--bg-dark), #0d0d14);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-light);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ═══════════ APPS ═══════════ */
#apps {
  background: #0d0d14;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
}

.app-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.app-card-header {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.app-banner {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.app-banner-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.localai-gradient {
  background: linear-gradient(135deg, #059669, #10b981, #34d399);
}

.power-gradient {
  background: linear-gradient(135deg, #dc2626, #ef4444, #f87171);
}

.app-card-body {
  padding: 28px;
}

.app-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.cours-bg { background: var(--cours-color); }
.drive-bg { background: var(--drive-color); }
.localai-bg { background: var(--localai-color); }
.power-bg { background: var(--power-color); }

.app-card-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.app-card-body p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.app-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ═══════════ DOWNLOAD ═══════════ */
#download {
  background: var(--bg-dark);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.download-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s ease;
  gap: 8px;
}

.download-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.download-icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  margin-bottom: 12px;
}

.download-icon.windows { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.download-icon.macos { background: rgba(156, 163, 175, 0.1); color: #9ca3af; }
.download-icon.linux { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }

.download-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

.download-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.download-size {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.btn-download {
  margin-top: 8px;
  background: var(--accent);
  color: white;
  padding: 10px 24px;
  font-size: 0.85rem;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.download-card:hover .btn-download {
  background: var(--accent-light);
}

.download-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 20px 24px;
  background: rgba(245, 158, 11, 0.05);
  border: 1px solid rgba(245, 158, 11, 0.15);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 700px;
  margin: 0 auto 24px;
}

.download-note svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: #f59e0b;
}

.download-note code {
  display: inline-block;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  font-size: 0.82rem;
  margin-top: 6px;
}

.download-all-releases {
  text-align: center;
}

.download-all-releases a {
  color: var(--accent-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.download-all-releases a:hover {
  color: var(--text);
}

/* ═══════════ HOW IT WORKS ═══════════ */
#how-it-works {
  background: #0d0d14;
}

.steps-grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.step:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
}

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--gradient-2);
  color: white;
  font-weight: 800;
  font-size: 1.2rem;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.step-arrow {
  color: var(--text-dim);
  font-size: 2rem;
  font-weight: 300;
  padding-top: 50px;
}

/* ═══════════ FOOTER ═══════════ */
#footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--border);
  background: var(--bg-dark);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.footer-brand strong {
  font-size: 1.1rem;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.82rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.82rem;
}

.footer-bottom a {
  color: var(--accent-light);
  text-decoration: none;
}

/* ═══════════ ANIMATIONS ═══════════ */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

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

  .features-grid,
  .apps-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    flex-direction: column;
    align-items: center;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 0;
  }

  .step {
    max-width: 100%;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .footer-content {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .app-card-header {
    height: 140px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }
}