/* ── CSS Variables ──────────────────────────────────────────────────────── */
:root {
  --bg-primary: #0b0b14;
  --bg-secondary: #111120;
  --bg-card: #16162a;
  --bg-card-hover: #1c1c34;
  --bg-input: #0e0e1b;
  --border: #1e1e38;
  --border-light: #2a2a48;
  --text-primary: #e4e4ec;
  --text-secondary: #7c7c9a;
  --text-muted: #4a4a64;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.08);
  --accent-hover: #00f0c0;
  --radius: 10px;
  --radius-sm: 6px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --accent-gradient: linear-gradient(135deg, #00d4aa, #00b4d8);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

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

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

/* ── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* ── Gradient Line (visual signature) ──────────────────────────────────── */
.gradient-line {
  height: 1px;
  background: var(--accent-gradient);
  opacity: 0.4;
  border: none;
  margin: 0;
}

/* ── Navbar ─────────────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  background: rgba(11, 11, 20, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}

.navbar.scrolled {
  background: rgba(11, 11, 20, 0.92);
  border-bottom-color: var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-brand:hover { text-decoration: none; }

.nav-brand svg {
  flex-shrink: 0;
}

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

.nav-links li {
  display: flex;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.3s var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-github svg {
  opacity: 0.6;
  transition: opacity 0.3s var(--ease);
}
.nav-github:hover svg {
  opacity: 1;
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(11, 11, 20, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 16px 40px;
  flex-direction: column;
  gap: 12px;
  z-index: 99;
}

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

.nav-mobile a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
}
.nav-mobile a:hover {
  color: var(--text-primary);
  text-decoration: none;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 140px 0 80px max(64px, calc((100vw - 1100px) / 2));
  overflow: hidden;
  min-height: 520px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  max-width: 520px;
}

.hero h1 {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -3px;
  line-height: 1;
  margin-bottom: 20px;
  background: linear-gradient(180deg, var(--text-primary) 40%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 440px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.hero-meta {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 20px 0;
}

.hero-image .hero-banner-wrap {
  position: relative;
  width: 140%;
  min-width: 580px;
  padding: 1px;
  border-radius: 13px 0 0 13px;
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.2), rgba(0, 180, 216, 0.1), var(--border));
}

.hero-image .hero-banner {
  border-radius: 12px 0 0 12px;
  overflow: hidden;
  background: var(--bg-primary);
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.3s var(--ease);
  text-decoration: none;
  border: none;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

/* ── Section Common ─────────────────────────────────────────────────────── */
.section {
  padding: 100px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-title {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ── Feature Tabs ───────────────────────────────────────────────────────── */
/* ── Feature Card Grid ──────────────────────────────────────────────────── */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 48px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  z-index: 0;
}

.feature-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
  opacity: 0.04;
}

.feature-card.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.12), 0 4px 16px rgba(0, 0, 0, 0.2);
}

.feature-card.active::before {
  opacity: 0.06;
}

.feature-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  transition: all 0.3s var(--ease);
  position: relative;
  z-index: 1;
}

.feature-card-icon svg {
  width: 24px;
  height: 24px;
  opacity: 0.65;
  transition: all 0.3s var(--ease);
}

.feature-card:hover .feature-card-icon svg {
  opacity: 0.8;
}

.feature-card.active .feature-card-icon {
  background: rgba(0, 212, 170, 0.12);
}

.feature-card.active .feature-card-icon svg {
  opacity: 1;
  color: var(--accent);
}

.feature-card-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.3s var(--ease);
  position: relative;
  z-index: 1;
  text-align: center;
  line-height: 1.3;
}

.feature-card:hover .feature-card-label {
  color: var(--text-secondary);
}

.feature-card.active .feature-card-label {
  color: var(--text-primary);
}

.tab-panels {
  position: relative;
}

.tab-panel {
  display: none;
  animation: panelIn 0.4s var(--ease);
}

.tab-panel.active {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 56px;
  align-items: center;
}

@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.feature-info h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.3px;
}

.feature-info h3 svg {
  color: var(--accent);
  flex-shrink: 0;
}

.feature-info .feature-desc {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 24px;
  line-height: 1.75;
}

.feature-info ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-info li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}

.feature-info li::before {
  content: '';
  flex-shrink: 0;
  width: 4px;
  height: 4px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.screenshot-frame {
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color 0.4s var(--ease);
  cursor: pointer;
}

.screenshot-frame:hover {
  border-color: var(--border-light);
}

/* ── Lightbox ──────────────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
  cursor: zoom-out;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 92vw;
  max-height: 90vh;
  border-radius: 10px;
  border: 1px solid var(--border-light);
  transform: scale(0.95);
  transition: transform 0.3s var(--ease);
}

.lightbox.open img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  transition: color 0.2s var(--ease);
}

.lightbox-close:hover {
  color: var(--text-primary);
}

/* ── Stats Strip ────────────────────────────────────────────────────────── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
}

.stat-card {
  background: var(--bg-secondary);
  padding: 36px 20px;
  text-align: center;
  transition: background 0.3s var(--ease);
}

.stat-card:hover {
  background: var(--bg-card);
}

.stat-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── CTA Section ────────────────────────────────────────────────────────── */
.cta {
  text-align: center;
  padding: 100px 32px;
}

.cta h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.cta .cta-subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 40px;
}

.cta .btn {
  margin-bottom: 20px;
}

.cta-requirements {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.cta-links {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.cta-links a {
  color: var(--text-muted);
  font-size: 13px;
  transition: color 0.3s var(--ease);
}
.cta-links a:hover {
  color: var(--text-primary);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color 0.3s var(--ease);
}
.footer-links a:hover {
  color: var(--text-primary);
}

/* ── Scroll Reveal ──────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .tab-panel.active {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-info {
    order: 2;
  }

  .screenshot-frame {
    order: 1;
  }

  .feature-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
}

@media (max-width: 767px) {
  .navbar {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: block;
  }

  .nav-mobile {
    padding: 16px 20px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 120px 20px 40px;
    text-align: center;
    min-height: auto;
    overflow: visible;
  }

  .hero-content {
    align-items: center;
    text-align: center;
    max-width: 100%;
    margin-bottom: 32px;
  }

  .hero h1 {
    font-size: 44px;
    letter-spacing: -2px;
  }

  .hero-tagline {
    font-size: 12px;
    letter-spacing: 3px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-subtitle br { display: none; }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
  }

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

  .hero-image .hero-banner-wrap {
    width: 100%;
    min-width: auto;
    border-radius: 13px;
  }

  .hero-image .hero-banner {
    border-radius: 12px;
  }

  .btn {
    justify-content: center;
  }

  .section {
    padding: 60px 20px;
  }

  .section-title {
    font-size: 28px;
  }

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

  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 32px;
  }

  .feature-card {
    padding: 14px 8px;
    gap: 8px;
  }

  .feature-card-icon {
    width: 36px;
    height: 36px;
  }

  .feature-card-icon svg {
    width: 20px;
    height: 20px;
  }

  .feature-card-label {
    font-size: 11px;
  }

  .feature-info h3 {
    font-size: 20px;
  }

  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
    margin: 0 20px;
  }

  .cta {
    padding: 60px 20px;
  }

  .cta h2 {
    font-size: 28px;
  }

  .footer {
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding: 24px 20px;
  }
}