/* ============================================================
   loop-task landing — palette from the app's DESIGN.md tokens
   brand amber · loop blue · task purple · project green
   ============================================================ */

:root {
  --bg: #0a0e14;            /* bg.base */
  --bg-surface: #111827;    /* bg.surface */
  --bg-elevated: #1e293b;   /* bg.elevated */
  --bg-input: #0f172a;      /* bg.input */
  --border: #1e293b;        /* border.default */
  --border-dim: #374151;    /* border.dim */
  --text: #e5e7eb;          /* text.primary */
  --text-sec: #9ca3af;      /* text.secondary */
  --text-muted: #6b7280;    /* text.muted */
  --brand: #fbbf24;
  --brand-soft: #fde68a;
  --brand-glow: rgba(251, 191, 36, 0.28);
  --loop: #38bdf8;
  --task: #a78bfa;
  --project: #34d399;
  --success: #4ade80;
  --warning: #facc15;
  --danger: #f87171;
  --idle: #fb923c;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 760px; }
.center { text-align: center; }

a { color: var(--brand-soft); text-decoration: none; }
a:hover { color: var(--brand); }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  padding: 0.1em 0.4em;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: 0.5em;
  letter-spacing: -0.02em;
}

.section { padding: 72px 0; }
.section-sub { color: var(--text-sec); max-width: 720px; margin-bottom: 2rem; }

.accent {
  background: linear-gradient(120deg, var(--brand), var(--idle));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- Nav ---------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.95rem;
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--brand);
  font-size: 1rem;
}

.brand-mark.small { width: 22px; height: 22px; font-size: 0.8rem; border-radius: 6px; }

.nav-links { display: flex; gap: 20px; align-items: center; }

.nav-links a { color: var(--text-sec); font-size: 0.9rem; transition: color 0.15s; white-space: nowrap; }
.nav-links a:hover { color: var(--text); }

/* ---------------- Hero ---------------- */
.hero { padding: 96px 0 48px; text-align: center; }

.hero-mark {
  display: inline-block;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--brand-soft);
  background: var(--bg-input);
  border: 1px solid var(--border-dim);
  border-radius: 999px;
  padding: 8px 22px;
  margin-bottom: 28px;
  box-shadow: 0 0 40px var(--brand-glow);
  animation: float 5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-sub { color: var(--text-sec); font-size: 1.1rem; max-width: 700px; margin: 0 auto 36px; }

.hero-platforms { color: var(--text-muted); font-size: 0.9rem; margin-top: 24px; font-family: var(--mono); }

.hero-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.hero-badges img { height: 20px; display: block; }

/* ---------------- Install box ---------------- */
.install-box {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-dim);
  border-radius: 10px;
  padding: 14px 18px;
  font-family: var(--mono);
  font-size: 1rem;
  box-shadow: 0 0 0 1px var(--brand-glow), 0 8px 40px rgba(0, 0, 0, 0.4);
  transition: border-color 0.2s;
}

.install-box:hover { border-color: var(--brand); }
.install-box.big { font-size: 1.15rem; padding: 18px 24px; }
.install-box code { background: none; border: none; padding: 0; color: var(--text); }
.install-prompt { color: var(--success); font-weight: 700; user-select: none; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  background: none;
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  transition: all 0.15s;
}

.copy-btn:hover { color: var(--brand); border-color: var(--brand); }
.copy-btn .icon-check { display: none; }
.copy-btn.copied .icon-copy { display: none; }
.copy-btn.copied .icon-check { display: block; color: var(--success); }
.copy-btn.copied { border-color: var(--success); }

/* ---------------- Terminal ---------------- */
.terminal-section { padding: 24px 0 48px; }

.terminal, .code-window {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-input);
  border: 1px solid var(--border-dim);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5), 0 0 80px rgba(251, 191, 36, 0.05);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.terminal-title { margin-left: 10px; font-family: var(--mono); font-size: 0.75rem; color: var(--text-muted); }

.terminal-body {
  padding: 20px;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  min-height: 260px;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-body .t-prompt { color: var(--success); font-weight: 700; }
.terminal-body .t-dim { color: var(--text-muted); }
.terminal-body .t-brand { color: var(--brand-soft); }
.terminal-body .t-ok { color: var(--success); }
.terminal-body .t-loop { color: var(--loop); }

.terminal-body .t-cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--brand);
  vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* ---------------- Code window ---------------- */
.code-window { max-width: 820px; }

.code-body {
  padding: 20px;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
}

.code-body code { background: none; border: none; padding: 0; font-size: inherit; }
.code-body .c { color: var(--text-muted); font-style: italic; }
.code-body .p { color: var(--success); font-weight: 700; }
.code-body .i { color: var(--brand); }
.code-body .f { color: var(--loop); }
.code-body .s { color: var(--task); }

/* ---------------- TUI board recreation ---------------- */
.board {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg);
  border: 1px solid var(--border-dim);
  border-radius: 12px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.82rem;
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5), 0 0 80px rgba(56, 189, 248, 0.05);
}

.board-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px 6px;
}

.b-brand { color: var(--brand); font-weight: 700; }
.b-dim { color: var(--text-muted); }
.b-right { margin-left: auto; display: flex; gap: 12px; }
.b-ok { color: var(--success); }
.b-idle { color: var(--idle); }
.b-paused { color: var(--warning); }
.b-danger { color: var(--danger); }
.b-project { color: var(--project); }

.board-tabs {
  display: flex;
  gap: 18px;
  padding: 4px 16px 10px;
  border-bottom: 1px solid var(--border);
}

.b-tab { color: var(--text-muted); font-weight: 700; }
.b-tab.active-loop { color: var(--loop); border-bottom: 2px solid var(--loop); }
.b-tab.task:hover { color: var(--task); }
.b-tab.project:hover { color: var(--project); }

.board-panels { display: flex; min-height: 190px; }

.board-list {
  width: 60%;
  border-right: 1px solid var(--border);
  padding: 12px 0;
}

.b-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 16px;
  color: var(--text);
}

.b-row.selected { background: #1e3a8a; color: #fff; }

.b-name { flex-grow: 1; }
.b-meta { color: var(--text-sec); font-size: 0.78rem; }
.b-row.selected .b-meta { color: #cbd5e1; }

.b-dot.ok { color: var(--success); }
.b-dot.idle { color: var(--idle); }
.b-dot.paused { color: var(--warning); }

.b-spinner { color: var(--success); }

.board-detail { width: 40%; padding: 14px 16px; }

.b-field { padding: 3px 0; color: var(--text); }
.b-label { display: inline-block; width: 74px; color: var(--text-muted); }
.b-spark { color: var(--loop); letter-spacing: 1px; }

.board-input {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 14px 4px;
  padding: 8px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
}

.b-bar { color: var(--brand); font-weight: 700; }
.b-placeholder { color: var(--text-muted); }

.b-cursor {
  display: inline-block;
  width: 7px;
  height: 0.95em;
  background: var(--brand);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
}

.board-hints {
  display: flex;
  justify-content: space-between;
  padding: 4px 18px 12px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.board-hints strong { color: var(--text-sec); }

/* ---------------- Cards ---------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover { transform: translateY(-3px); }

.card h3 { font-family: var(--mono); font-size: 1rem; margin-bottom: 8px; }
.card p { color: var(--text-sec); font-size: 0.9rem; }

.card.c-loop h3 { color: var(--loop); }
.card.c-loop:hover { border-color: var(--loop); }
.card.c-task h3 { color: var(--task); }
.card.c-task:hover { border-color: var(--task); }
.card.c-project h3 { color: var(--project); }
.card.c-project:hover { border-color: var(--project); }
.card.c-brand h3 { color: var(--brand); }
.card.c-brand:hover { border-color: var(--brand); }

/* ---------------- API table ---------------- */
.api-table { border: 1px solid var(--border-dim); border-radius: 12px; overflow: hidden; }

.api-row {
  display: grid;
  grid-template-columns: minmax(240px, 2fr) 3fr;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  align-items: center;
}

.api-row:nth-child(odd) { background: var(--bg-input); }
.api-row:last-child { border-bottom: none; }

.api-row > code { color: var(--brand-soft); background: none; border: none; font-size: 0.85rem; word-break: break-word; }
.api-row p { color: var(--text-sec); font-size: 0.9rem; }

/* ---------------- Demo gif ---------------- */
.demo-gif {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-dim);
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5);
  margin-top: 12px;
}

/* ---------------- CTA ---------------- */
.cta-section { background: radial-gradient(ellipse at center, var(--brand-glow), transparent 70%); }

.cta-note { color: var(--text-sec); margin-top: 20px; font-size: 0.9rem; }

.cta-links { display: flex; justify-content: center; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--border-dim);
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.btn:hover { border-color: var(--brand); color: var(--text); }

.btn.primary { background: var(--brand); border-color: var(--brand); color: #0a0e14; }
.btn.primary:hover { box-shadow: 0 4px 24px var(--brand-glow); filter: brightness(1.08); color: #0a0e14; }

/* ---------------- Footer ---------------- */
.footer { border-top: 1px solid var(--border); padding: 32px 0; margin-top: 40px; }

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-sec);
  font-size: 0.9rem;
}

.footer-brand { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-weight: 700; color: var(--text); }

.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--text-sec); }
.footer-links a:hover { color: var(--brand-soft); }

/* ---------------- Scroll reveal ---------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-mark { animation: none; }
  .t-cursor, .b-cursor { animation: none; }
}

/* ---------------- Responsive ---------------- */
@media (max-width: 720px) {
  .board-panels { flex-direction: column; }
  .board-list, .board-detail { width: 100%; }
  .board-list { border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 640px) {
  .nav-brand { font-size: 0.85rem; }
  .nav-links { gap: 12px; font-size: 0.85rem; }
  .nav-links a:nth-child(1), .nav-links a:nth-child(2), .nav-links a:nth-child(3) { display: none; }
  .hero { padding: 64px 0 36px; }
  .install-box { font-size: 0.85rem; gap: 8px; padding: 12px 14px; }
  .install-box.big { font-size: 0.9rem; }
  .section { padding: 48px 0; }
  .terminal-body, .code-body { font-size: 0.72rem; }
  .board { font-size: 0.72rem; }
  .api-row { grid-template-columns: 1fr; gap: 6px; }
}