/* ============================================
   Discotto Labs — Design System
   Palette: Nano Banana Pro (Dark + Yellow)
   Font: Space Grotesk
   ============================================ */

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-2: #161616;
  --border: #242424;
  --border-hover: #383838;
  --accent: #f0e040;
  --accent-hover: #ffe800;
  --accent-dim: rgba(240, 224, 64, 0.1);
  --text: #f0f0f0;
  --text-muted: #888888;
  --text-dim: #444444;
  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1080px;
  --nav-h: 64px;
}

/* ============ Reset ============ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

img, svg {
  display: block;
}

/* ============ Container ============ */

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============ Nav ============ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  cursor: pointer;
  transition: color 200ms ease;
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  cursor: pointer;
  transition: background 200ms ease, transform 150ms ease;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.nav-cta:active {
  transform: translateY(0);
}

/* ============ Hero ============ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 1.5rem;
}

.hero-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-headline {
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 2.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  padding: 0.875rem 2rem;
  border-radius: 100px;
  cursor: pointer;
  border: none;
  transition: background 200ms ease, transform 150ms ease, box-shadow 200ms ease;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(240, 224, 64, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* ============ App Section ============ */

.app-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition: border-color 250ms ease;
}

.app-card:hover {
  border-color: var(--border-hover);
}

.app-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.app-badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
}

.app-price {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.app-name {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.app-desc {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 1.75rem;
}

.app-store-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid rgba(240, 224, 64, 0.3);
  padding: 0.625rem 1.25rem;
  border-radius: 100px;
  cursor: pointer;
  transition: background 200ms ease, border-color 200ms ease;
}

.app-store-link:hover {
  background: var(--accent-dim);
  border-color: rgba(240, 224, 64, 0.6);
}

.app-store-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ============ Features ============ */

.features-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-card {
  background: var(--surface);
  padding: 2rem;
  transition: background 200ms ease;
}

.feature-card:hover {
  background: var(--surface-2);
}

.feature-card--accent {
  background: rgba(240, 224, 64, 0.06);
}

.feature-card--accent:hover {
  background: rgba(240, 224, 64, 0.1);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  color: var(--accent);
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.feature-icon--dark {
  background: rgba(0, 0, 0, 0.4);
  color: var(--accent);
}

.feature-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.feature-desc {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ============ Studio ============ */

.studio-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.studio-inner {
  max-width: 680px;
}

.studio-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.studio-headline {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.studio-desc {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ============ Footer ============ */

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 200ms ease;
}

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

/* ============ Focus States (a11y) ============ */

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============ Reduced Motion ============ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ Tablet ============ */

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

  .hero-inner {
    padding: 4rem 1.5rem 5rem;
  }

  .app-card {
    padding: 1.75rem;
  }

  .studio-section {
    padding: 4rem 0;
  }
}

/* ============ Mobile ============ */

@media (max-width: 480px) {
  :root {
    --nav-h: 56px;
  }

  .container {
    padding: 0 1rem;
  }

  .hero-inner {
    padding: 3rem 1rem 4rem;
  }

  .btn-primary {
    width: 100%;
    justify-content: center;
  }

  .app-card {
    padding: 1.25rem;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .features-grid {
    border-radius: var(--radius-sm);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}