/* ═══════════════════════════════════════════
   T-Memo Landing Page — Dark Premium Theme
   Inspired by Linear / Raycast aesthetic
   ═══════════════════════════════════════════ */

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

/* ── Design Tokens ── */
:root {
  --bg: #0a0a0b;
  --bg-raised: #111113;
  --bg-card: #161618;
  --bg-card-hover: #1c1c1f;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text: #ededef;
  --text-secondary: #8b8b8d;
  --text-muted: #5c5c5e;
  --accent: #14b8a6;
  --accent-dim: rgba(20, 184, 166, 0.15);
  --accent-glow: rgba(20, 184, 166, 0.25);
  --cta: #f57c00;
  --cta-hover: #e56a00;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-w: 1120px;
  --transition: 200ms ease;
}

html {
  scroll-behavior: smooth
}

body {
  font-family: var(--font);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* ── Container ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  cursor: pointer;
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  cursor: pointer;
}

.nav-cta:hover {
  background: #0fa898;
  transform: translateY(-1px);
}

/* ═══════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════ */
.hero {
  position: relative;
  text-align: center;
  padding: 160px 0 80px;
  overflow: hidden;
}

/* Gradient glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-dim);
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 28px;
}

.hero-badge svg {
  width: 14px;
  height: 14px
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(180deg, #fff 30%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.btn-primary:hover {
  background: #0fa898;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-primary svg {
  width: 20px;
  height: 20px
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-secondary svg {
  width: 20px;
  height: 20px
}

/* Hero Screenshot */
.hero-screenshot {
  max-width: 480px;
  margin: 0 auto;
}

.hero-screenshot img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 80px var(--accent-glow);
}

/* ═══════════════════════════════════════════
   Logos / Social Proof
   ═══════════════════════════════════════════ */
.social-proof {
  text-align: center;
  padding: 64px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.social-proof p {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.proof-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.proof-stat {
  text-align: center;
}

.proof-stat .number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}

.proof-stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ═══════════════════════════════════════════
   Features
   ═══════════════════════════════════════════ */
.features {
  padding: 100px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  cursor: default;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: 10px;
  margin-bottom: 16px;
  color: var(--accent);
}

.feature-icon svg {
  width: 22px;
  height: 22px
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   Screenshots Showcase
   ═══════════════════════════════════════════ */
.screenshots {
  padding: 100px 0;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.screenshot-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.screenshot-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.screenshot-item img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
}

/* ═══════════════════════════════════════════
   How It Works
   ═══════════════════════════════════════════ */
.how-it-works {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.step {
  position: relative;
  text-align: center;
  padding: 32px 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent-dim);
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: 14px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 20px;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* connector line between steps */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 55px;
  right: -16px;
  width: 32px;
  height: 1px;
  background: var(--border-hover);
}

/* ═══════════════════════════════════════════
   FAQ
   ═══════════════════════════════════════════ */
.faq {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.faq-list {
  max-width: 680px;
  margin: 48px auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: color var(--transition);
  user-select: none;
}

.faq-question:hover {
  color: var(--accent)
}

.faq-question svg {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.open .faq-question svg {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease, padding 300ms ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════
   Final CTA
   ═══════════════════════════════════════════ */
.final-cta {
  position: relative;
  text-align: center;
  padding: 100px 0;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta .container {
  position: relative;
  z-index: 1
}

.final-cta h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.final-cta p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta .hero-actions {
  margin-bottom: 0;
}

/* ═══════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 8px;
}

.footer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 4px 0;
  transition: color var(--transition);
}

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

/* Languages grid in footer */
.lang-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px 16px;
}

/* ═══════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════ */

/* Tablet */
@media (max-width: 768px) {
  .nav-links .nav-link-text {
    display: none
  }

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

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

  .steps {
    grid-template-columns: 1fr;
    gap: 24px
  }

  .step:not(:last-child)::after {
    display: none
  }

  .footer-inner {
    flex-direction: column
  }

  .lang-grid {
    grid-template-columns: repeat(3, 1fr)
  }

  .hero {
    padding: 120px 0 60px
  }

  .hero-screenshot {
    max-width: 360px
  }

  .proof-stats {
    gap: 32px
  }
}

/* Mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 16px
  }

  .feature-grid {
    grid-template-columns: 1fr
  }

  .screenshots-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px
  }

  .hero {
    padding: 110px 0 48px
  }

  .hero-screenshot {
    max-width: 300px
  }

  .features,
  .screenshots,
  .how-it-works,
  .faq,
  .final-cta {
    padding: 64px 0;
  }

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

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

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto
  }
}