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

:root {
  --blue:      #3B82F6;
  --cyan:      #06B6D4;
  --dark:      #0F172A;
  --surface:   #1E293B;
  --text:      #0F172A;
  --muted:     #64748B;
  --border:    #E2E8F0;
  --bg:        #FFFFFF;
  --bg-subtle: #F8FAFC;
  --card-bg:   #FFFFFF;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text:      #F1F5F9;
    --muted:     #94A3B8;
    --border:    #1E293B;
    --bg:        #0A0F1E;
    --bg-subtle: #0F172A;
    --card-bg:   #1E293B;
  }
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

/* ===== GitHub ribbon ===== */
.github-ribbon {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 999;
  display: block;
  width: 80px;
  height: 80px;
  transition: opacity 0.2s;
}
.github-ribbon:hover { opacity: 0.85; }

/* ===== Gradient text ===== */
.gradient-text {
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
  border: none;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: 1; }

.btn-primary {
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  color: white;
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.btn-lg { padding: 14px 28px; font-size: 16px; border-radius: 10px; }

/* ===== Nav ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.nav-brand img { border-radius: 7px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}
.nav-links a:hover { color: var(--text); }
.nav-links .btn { margin-left: 4px; }

/* ===== Hero ===== */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 100px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: linear-gradient(90deg, rgba(59,130,246,0.1), rgba(6,182,212,0.1));
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 480px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

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

/* ===== Mockup ===== */
.hero-mockup {
  display: flex;
  justify-content: center;
}

.mockup-window {
  width: 100%;
  max-width: 380px;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(15,23,42,0.35), 0 0 0 1px rgba(15,23,42,0.12);
}

@media (prefers-color-scheme: dark) {
  .mockup-window {
    box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.06);
  }
}

.mockup-bar {
  background: #2D3748;
  height: 36px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 7px;
}
.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot.red    { background: #FF5F57; }
.dot.yellow { background: #FEBC2E; }
.dot.green  { background: #28C840; }

.mockup-screen {
  background: var(--dark);
  height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

/* Cloth mascot (CSS-only) */
.cloth {
  width: 64px;
  height: 64px;
  background: white;
  border-radius: 14px;
  position: relative;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: wiggle 2s ease-in-out infinite;
}
@keyframes wiggle {
  0%, 100% { transform: translateX(-6px); }
  50%       { transform: translateX(6px); }
}

.eye {
  width: 7px;
  height: 7px;
  background: #1a1a1a;
  border-radius: 50%;
  position: absolute;
  top: 22px;
}
.eye.left  { left: 16px; }
.eye.right { right: 16px; }

.smile {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 10px;
  border: 2.5px solid #1a1a1a;
  border-top: none;
  border-radius: 0 0 22px 22px;
}

.mockup-trail {
  position: absolute;
  bottom: 88px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(6,182,212,0.6), rgba(59,130,246,0.3));
  border-radius: 2px;
  animation: trail 2s ease-in-out infinite;
}
@keyframes trail {
  0%, 100% { opacity: 0.3; transform: scaleX(0.7) translateX(-10%); }
  50%       { opacity: 0.8; transform: scaleX(1) translateX(0); }
}

.mockup-timer {
  font-family: 'Inter', monospace;
  font-size: 40px;
  font-weight: 200;
  color: white;
  letter-spacing: 2px;
  text-shadow: 0 0 20px rgba(6,182,212,0.6);
}

.mockup-hint {
  font-size: 11px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.03em;
}

/* ===== Features ===== */
.features {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 96px 24px;
}
.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.features h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  line-height: 1.2;
}

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

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.feature-card:hover {
  box-shadow: 0 8px 32px rgba(59,130,246,0.1);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 28px;
  margin-bottom: 14px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
}

/* ===== Remarks ===== */
.remarks {
  padding: 96px 24px;
  text-align: center;
}
.remarks-inner { max-width: 900px; margin: 0 auto; }
.remarks h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}
.remarks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.remark {
  padding: 20px 20px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  font-style: italic;
}

/* ===== Install ===== */
.install {
  background: var(--dark);
  padding: 96px 24px;
  color: white;
}
.install-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.install h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}
.install-tabs {
  display: flex;
  align-items: center;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.install-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.install-label {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.install-divider {
  font-size: 14px;
  color: rgba(255,255,255,0.3);
  font-weight: 500;
}
.code-block {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
}
.code-block code {
  font-family: 'SF Mono', 'Fira Mono', 'Cascadia Code', monospace;
  font-size: 14px;
  color: var(--cyan);
}
.install-note {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ===== Footer ===== */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 48px 24px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-name {
  font-size: 20px;
  font-weight: 800;
}
.footer-tagline {
  font-size: 13px;
  color: var(--muted);
}
.footer-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--muted);
}
.footer-links a:hover { color: var(--text); }
.footer-copy {
  font-size: 13px;
  color: var(--muted);
  width: 100%;
  text-align: right;
}

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 60px 20px;
    text-align: center;
  }
  .hero-sub { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-mockup { order: -1; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .remarks-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { justify-content: center; text-align: center; }
  .footer-copy { text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .remarks-grid { grid-template-columns: 1fr; }
  .install-tabs { flex-direction: column; }
  .github-ribbon { width: 64px; height: 64px; }
}