/* Memos Clipper — marketing site
   Single static site, no external CDN, no fonts, no JS framework. */

:root {
  --bg: #0b0d10;
  --bg-elev: #14181d;
  --bg-card: #171b21;
  --line: #232932;
  --text: #e6e9ee;
  --text-dim: #9aa3af;
  --text-mute: #6b7280;
  --brand: #7dd3fc;
  --brand-2: #a78bfa;
  --accent: #fbbf24;
  --danger: #f87171;
  --ok: #34d399;
  --max: 1080px;
  --radius: 14px;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(1100px 600px at 80% -10%, rgba(167, 139, 250, 0.12), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(125, 211, 252, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(140%) blur(10px);
  background: rgba(11, 13, 16, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 600; font-size: 16px;
}
.brand .logo {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  display: grid; place-items: center; color: #0b0d10; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--text-dim); font-size: 14px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; font-weight: 600; font-size: 14px;
  border: 1px solid transparent; cursor: pointer; transition: transform .08s ease, background .15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #0b0d10;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: #34404d; background: var(--bg-elev); }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 56px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-dim);
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--bg-elev);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.hero h1 {
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.05; letter-spacing: -0.02em;
  margin: 22px 0 16px; font-weight: 700;
}
.hero h1 .grad {
  background: linear-gradient(135deg, var(--brand), var(--brand-2) 55%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead {
  font-size: 18px; color: var(--text-dim); max-width: 640px; margin: 0 0 28px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.meta-row {
  margin-top: 18px; color: var(--text-mute); font-size: 13px;
  display: flex; gap: 16px; flex-wrap: wrap;
}
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- Section ---------- */
.section { padding: 64px 0; }
.section h2 {
  font-size: 30px; letter-spacing: -0.01em; margin: 0 0 12px;
}
.section .sub { color: var(--text-dim); max-width: 640px; margin: 0 0 36px; }

/* ---------- Feature grid ---------- */
.grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: linear-gradient(180deg, var(--bg-card), var(--bg-elev));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.card .ico {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center; font-size: 18px;
  background: rgba(125, 211, 252, 0.12); color: var(--brand);
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--text-dim); font-size: 14px; }

/* ---------- Privacy callout ---------- */
.callout {
  border: 1px solid var(--line);
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(52, 211, 153, 0.10), transparent 60%),
    var(--bg-card);
  border-radius: var(--radius); padding: 28px;
  display: grid; grid-template-columns: 1fr; gap: 18px;
}
.callout h3 { margin: 0; font-size: 18px; }
.callout p { margin: 0; color: var(--text-dim); }
.callout .points { display: grid; gap: 10px; }
.callout .pt { display: flex; gap: 10px; align-items: flex-start; color: var(--text); font-size: 15px; }
.callout .pt .tick { color: var(--ok); font-weight: 700; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.step {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; background: var(--bg-card);
}
.step .n {
  width: 28px; height: 28px; border-radius: 8px;
  background: rgba(167, 139, 250, 0.14); color: var(--brand-2);
  display: grid; place-items: center; font-weight: 700; margin-bottom: 12px;
}
.step h3 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; color: var(--text-dim); font-size: 14px; }
.step code {
  background: #0e1216; border: 1px solid var(--line); padding: 1px 6px;
  border-radius: 5px; font-size: 13px; color: var(--accent);
}

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; max-width: 760px; }
.faq details {
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-card); padding: 14px 18px;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--brand); }
.faq details[open] summary::before { content: "− "; }
.faq p { margin: 10px 0 0; color: var(--text-dim); font-size: 15px; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 36px 0 60px; color: var(--text-mute); font-size: 14px;
}
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer .links { display: flex; gap: 18px; }
footer a { color: var(--text-dim); }

/* ---------- Legal pages ---------- */
.legal { padding: 56px 0 80px; }
.legal h1 { font-size: 34px; margin: 0 0 6px; letter-spacing: -0.01em; }
.legal .updated { color: var(--text-mute); font-size: 13px; margin-bottom: 28px; }
.legal h2 { font-size: 20px; margin: 32px 0 10px; }
.legal p, .legal li { color: var(--text-dim); }
.legal ul, .legal ol { padding-left: 20px; }
.legal li { margin: 6px 0; }
.legal .lang-switch {
  display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
  margin-bottom: 24px;
}
.legal .lang-switch button {
  background: transparent; color: var(--text-dim); border: 0; padding: 8px 14px;
  font: inherit; cursor: pointer;
}
.legal .lang-switch button.on { background: var(--bg-elev); color: var(--text); }
.legal section[data-lang] { display: none; }
.legal section[data-lang].on { display: block; }
.legal code {
  background: #0e1216; border: 1px solid var(--line); padding: 1px 6px;
  border-radius: 5px; color: var(--accent); font-size: 13px;
}
.legal table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.legal th, .legal td {
  border: 1px solid var(--line); padding: 10px 12px; text-align: left;
  font-size: 14px; vertical-align: top;
}
.legal th { background: var(--bg-elev); color: var(--text); }
.legal td { color: var(--text-dim); }

/* ---------- Hero mock ---------- */
.mock {
  margin-top: 44px; border: 1px solid var(--line); border-radius: 16px;
  background: linear-gradient(180deg, #11151a, #0d1115);
  box-shadow: var(--shadow); overflow: hidden;
}
.mock .bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
}
.mock .bar i {
  width: 11px; height: 11px; border-radius: 50%; display: inline-block;
  background: #2a313b;
}
.mock .bar .addr {
  margin-left: 8px; font-size: 12px; color: var(--text-mute);
  background: #0b0e12; border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 6px;
}
.mock .body { padding: 22px; }
.mock .bubble {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; max-width: 560px;
  position: relative;
}
.mock .bubble::before {
  content: "✦ Save to Memos";
  position: absolute; top: -14px; right: 14px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #0b0d10; font-size: 12px; font-weight: 700;
  padding: 6px 10px; border-radius: 8px;
}
.mock .bubble .handle { color: var(--text-mute); font-size: 13px; margin-bottom: 4px; }
.mock .bubble .body-txt { color: var(--text); }
.mock .bubble .tags { margin-top: 10px; color: var(--brand); font-size: 13px; }
.mock .meta-line { color: var(--text-mute); font-size: 13px; margin-top: 10px; }