/* BK Picker landing — Ink Surface design language */

:root {
  --base: #0a0c10;
  --surface: #12161d;
  --elevated: #1a2030;
  --overlay: #242c3d;
  --hairline: rgb(255 255 255 / 0.08);
  --border: rgb(255 255 255 / 0.12);
  --text: #eef2f8;
  --muted: #8b96a8;
  --accent: #7eb0ff;
  --accent-soft: color-mix(in srgb, #7eb0ff 22%, transparent);
  --success: #34d399;
  --glow: #3b82f6;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font: "Outfit", "Segoe UI Variable", "SF Pro Text", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Consolas, monospace;
  --shadow: 0 24px 64px rgb(0 0 0 / 0.45);
  --motion: 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 15% -10%, color-mix(in srgb, var(--glow) 28%, transparent), transparent 55%),
    radial-gradient(700px 380px at 95% 8%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 50%),
    linear-gradient(180deg, #0d1016 0%, var(--base) 40%, #07090c 100%);
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

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

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ——— Nav ——— */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  background: color-mix(in srgb, var(--surface) 62%, transparent);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 650;
  font-size: 1.05rem;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a:not(.btn) {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 550;
  padding: 0.45rem 0.75rem;
  border-radius: 10px;
  transition: color var(--motion), background var(--motion);
}

.nav-links a:not(.btn):hover {
  color: var(--text);
  background: color-mix(in srgb, var(--elevated) 70%, transparent);
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0 1.15rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition:
    transform var(--motion),
    background var(--motion),
    box-shadow var(--motion),
    border-color var(--motion);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(180deg, #93bfff 0%, var(--accent) 100%);
  color: #0a0c10;
  box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 28%, transparent);
}

.btn-primary:hover {
  box-shadow: 0 14px 34px color-mix(in srgb, var(--accent) 38%, transparent);
}

.btn-ghost {
  background: color-mix(in srgb, var(--elevated) 75%, transparent);
  border-color: var(--hairline);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--border);
  background: var(--elevated);
}

.btn-lg {
  min-height: 3.15rem;
  padding-inline: 1.35rem;
  font-size: 1rem;
}

/* ——— Hero ——— */
.hero {
  padding: 4.5rem 0 3.5rem;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  max-width: 12ch;
}

.hero-lead {
  margin: 1.15rem 0 0;
  max-width: 34rem;
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.hero-meta strong {
  color: var(--text);
  font-weight: 650;
}

/* App mock ——— */
.mock-stage {
  position: relative;
  min-height: 420px;
}

.mock-glow {
  position: absolute;
  inset: 8% 5% auto;
  height: 55%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, color-mix(in srgb, var(--mock-color, #3b82f6) 55%, transparent), transparent 70%);
  filter: blur(28px);
  pointer-events: none;
  transition: background 0.4s ease;
}

.mock-window {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow), inset 0 1px 0 rgb(255 255 255 / 0.05);
  backdrop-filter: blur(18px);
  display: grid;
  grid-template-columns: 52px 1fr;
  min-height: 440px;
  animation: float-in 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.mock-rail {
  border-right: 1px solid var(--hairline);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 0;
}

.mock-rail span {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.mock-rail span.active {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 22%, var(--elevated));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 45%, transparent);
}

.mock-main {
  padding: 1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mock-hero {
  height: 120px;
  border-radius: 18px;
  background: var(--mock-color, #3b82f6);
  display: grid;
  place-items: center;
  box-shadow:
    inset 0 0 0 1px rgb(255 255 255 / 0.1),
    0 16px 40px color-mix(in srgb, var(--mock-color, #3b82f6) 25%, transparent);
  transition: background 0.35s ease;
  position: relative;
  overflow: hidden;
}

.mock-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgb(255 255 255 / 0.16), transparent 45%, rgb(0 0 0 / 0.18));
}

.mock-hex {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 1.35rem;
  color: #fff;
  text-shadow: 0 2px 12px rgb(0 0 0 / 0.25);
}

.mock-formats {
  display: flex;
  gap: 0.35rem;
  padding: 0.3rem;
  border-radius: 12px;
  background: color-mix(in srgb, var(--elevated) 80%, transparent);
  border: 1px solid var(--hairline);
  overflow: auto;
}

.mock-formats i {
  font-style: normal;
  font-size: 0.68rem;
  font-weight: 650;
  padding: 0.4rem 0.55rem;
  border-radius: 8px;
  color: var(--muted);
  white-space: nowrap;
}

.mock-formats i.on {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 22%, var(--overlay));
}

.mock-row {
  display: flex;
  gap: 0.45rem;
}

.mock-chip {
  flex: 1;
  text-align: center;
  padding: 0.55rem 0.4rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--muted);
  background: color-mix(in srgb, var(--elevated) 80%, transparent);
  border: 1px solid var(--hairline);
}

.mock-chip.on {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 18%, var(--elevated));
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.mock-cards {
  display: grid;
  gap: 0.5rem;
}

.mock-card {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.65rem;
  border-radius: 12px;
  background: color-mix(in srgb, var(--elevated) 85%, transparent);
  border: 1px solid var(--hairline);
}

.mock-swatch {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  flex-shrink: 0;
}

.mock-card small {
  display: block;
  color: var(--muted);
  font-size: 0.68rem;
}

.mock-card strong {
  font-size: 0.8rem;
  font-weight: 650;
}

.mock-card code {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
}

/* ——— Sections ——— */
section {
  padding: 4.5rem 0;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section-head p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 1.02rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s cubic-bezier(0.2, 0.8, 0.2, 1),
    transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--elevated) 72%, transparent);
  border: 1px solid var(--hairline);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.03);
  transition:
    transform var(--motion),
    border-color var(--motion),
    box-shadow var(--motion);
}

.feature:hover {
  transform: translateY(-3px);
  border-color: rgb(255 255 255 / 0.14);
  box-shadow: 0 14px 36px rgb(0 0 0 / 0.28);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 0.9rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  font-size: 1.1rem;
}

.feature h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
}

.feature p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

/* Showcase */
.showcase {
  display: grid;
  gap: 1.25rem;
}

.showcase-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
  align-items: stretch;
}

.showcase-row.reverse {
  grid-template-columns: 0.9fr 1.1fr;
}

.showcase-row.reverse .shot {
  order: 2;
}

.showcase-row.reverse .showcase-copy {
  order: 1;
}

.shot {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}

.showcase-copy {
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--surface) 75%, transparent);
  border: 1px solid var(--hairline);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.65rem;
}

.showcase-copy h3 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.showcase-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.35rem;
}

.pill-list span {
  font-size: 0.75rem;
  font-weight: 650;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  color: var(--muted);
  background: var(--elevated);
  border: 1px solid var(--hairline);
}

/* Developer */
.dev-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
  padding: 1.5rem;
  border-radius: calc(var(--radius-xl) + 4px);
  background:
    radial-gradient(500px 220px at 10% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--hairline);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.04);
}

.dev-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.stat {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--elevated) 80%, transparent);
  border: 1px solid var(--hairline);
}

.stat strong {
  display: block;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat span {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.code-card {
  border-radius: var(--radius-lg);
  background: #0e1218;
  border: 1px solid var(--hairline);
  padding: 1rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.7;
  color: #c5d0e0;
  overflow: auto;
}

.code-card .c-muted { color: #6b778a; }
.code-card .c-accent { color: var(--accent); }
.code-card .c-ok { color: var(--success); }

/* Download */
.download {
  text-align: center;
  padding: 4rem 1.5rem;
  border-radius: calc(var(--radius-xl) + 6px);
  background:
    radial-gradient(600px 240px at 50% 0%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 65%),
    color-mix(in srgb, var(--elevated) 70%, transparent);
  border: 1px solid var(--hairline);
}

.download h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  letter-spacing: -0.03em;
}

.download p {
  margin: 0.85rem auto 0;
  max-width: 32rem;
  color: var(--muted);
  line-height: 1.55;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.download-note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Footer */
.footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--hairline);
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

/* Privacy policy */
.legal {
  width: min(720px, calc(100% - 2.5rem));
  margin: 2.5rem auto 4rem;
}

.legal h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.4rem;
}

.legal .updated {
  color: var(--muted);
  margin: 0 0 1.75rem;
}

.legal h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.6rem;
}

.legal p,
.legal li {
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
  line-height: 1.6;
  font-size: 1.02rem;
}

.legal ul {
  padding-left: 1.2rem;
}

.legal a {
  color: var(--accent);
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 900px) {
  .hero,
  .showcase-row,
  .showcase-row.reverse,
  .dev-panel {
    grid-template-columns: 1fr;
  }

  .showcase-row.reverse .shot,
  .showcase-row.reverse .showcase-copy {
    order: initial;
  }

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

  .hero h1 {
    max-width: none;
  }

  .nav-links .hide-sm {
    display: none;
  }
}

@media (max-width: 600px) {
  .feature-grid,
  .dev-stats {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .mock-window {
    min-height: 380px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .mock-window,
  .feature {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}