/* Almost Life — warm-dusk design language (mirrors the app's AlmostTheme).
   twilight (blue-violet) = sealed / waiting · amber = ready / answered. */

:root {
  --paper: oklch(0.971 0.008 75);
  --paper2: oklch(0.984 0.006 78);
  --card: oklch(0.996 0.004 82);
  --ink: oklch(0.305 0.013 60);
  --ink2: oklch(0.505 0.012 60);
  --ink3: oklch(0.665 0.010 62);
  --line: oklch(0.40 0.01 60 / 0.12);
  --line2: oklch(0.40 0.01 60 / 0.07);
  --twi: oklch(0.585 0.078 268);
  --twi2: oklch(0.93 0.022 268);
  --amber: oklch(0.685 0.088 56);
  --amber2: oklch(0.945 0.028 70);
  --serif: 'Newsreader', 'Noto Serif SC', Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'PingFang SC', system-ui, sans-serif;
  --maxw: 920px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: oklch(0.205 0.014 280);
    --paper2: oklch(0.235 0.015 280);
    --card: oklch(0.258 0.016 280);
    --ink: oklch(0.94 0.008 80);
    --ink2: oklch(0.755 0.012 75);
    --ink3: oklch(0.585 0.014 70);
    --line: oklch(0.92 0.01 80 / 0.16);
    --line2: oklch(0.92 0.01 80 / 0.08);
    --twi: oklch(0.74 0.075 268);
    --twi2: oklch(0.34 0.045 268);
    --amber: oklch(0.80 0.085 65);
    --amber2: oklch(0.355 0.04 65);
  }
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(120% 80% at 50% 0%, var(--twi2) 0%, transparent 46%),
    var(--paper);
  background-attachment: fixed;
  line-height: 1.6;
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

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

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

/* ---- Brand mark ---- */
.ring { display: inline-block; vertical-align: middle; }

/* ---- Nav ---- */
nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: oklch(0.99 0.006 78 / 0.55);
  border-bottom: 1px solid var(--line2);
}
@media (prefers-color-scheme: dark) {
  nav { background: oklch(0.21 0.014 280 / 0.6); }
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 600; font-size: 17px; color: var(--ink); }
.brand .name { font-family: var(--serif); font-weight: 500; font-size: 20px; }
.brand .cn { font-family: 'Noto Serif SC', serif; color: var(--ink3); font-weight: 400; }
.nav-links { display: flex; gap: 22px; font-size: 15px; }
.nav-links a { color: var(--ink2); }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
@media (max-width: 560px) { .nav-links { gap: 14px; font-size: 14px; } .brand .cn { display: none; } }

/* ---- Language toggle + i18n ---- */
.nav-right { display: flex; align-items: center; gap: 18px; }
.lang-toggle { display: inline-flex; padding: 3px; border-radius: 100px; background: var(--card); border: 1px solid var(--line); flex: none; }
.lang-toggle button { border: none; cursor: pointer; font-family: inherit; padding: 5px 12px; border-radius: 100px; font-size: 13px; font-weight: 500; background: none; color: var(--ink3); transition: background .15s ease, color .15s ease; }
.lang-toggle button.active { background: var(--ink); color: var(--paper); font-weight: 600; }
@media (max-width: 560px) { .lang-toggle button { padding: 5px 10px; font-size: 12.5px; } .nav-right { gap: 12px; } }

/* show only the active language; hidden until JS sets data-lang to avoid a flash */
html:not([data-lang]) .lang.zh { display: none; }
[data-lang="en"] .lang.zh { display: none; }
[data-lang="zh"] .lang.en { display: none; }

/* ---- Hero ---- */
.hero { text-align: center; padding: 84px 0 60px; }
.hero .mark { animation: float 6s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce) { .hero .mark { animation: none; } }
.hero h1 {
  font-family: var(--serif); font-weight: 400; letter-spacing: -0.01em;
  font-size: clamp(40px, 8vw, 64px); line-height: 1.04; margin: 26px 0 0;
}
.hero h1 .cn { font-family: 'Noto Serif SC', serif; }
.hero h1 .dot { color: var(--ink3); font-weight: 300; }
.hero .tag {
  font-size: clamp(17px, 2.6vw, 21px); color: var(--ink2);
  max-width: 30ch; margin: 22px auto 0; line-height: 1.5;
}
.hero .tag-cn { font-family: var(--serif); color: var(--ink3); font-size: 16px; margin-top: 12px; max-width: 34ch; }
/* Chinese hero line is wider per character — give it room so its <br> yields two lines, not three */
.hero .tag.zh { max-width: 30em; }
.badge {
  display: inline-flex; align-items: center; gap: 9px; margin-top: 34px;
  padding: 13px 22px; border-radius: 100px;
  background: var(--ink); color: var(--paper);
  font-size: 15px; font-weight: 500;
  box-shadow: 0 12px 30px -12px oklch(0.305 0.013 60 / 0.6);
}
.badge.soon { background: var(--card); color: var(--ink2); border: 1px solid var(--line); box-shadow: none; }
.badge .spark { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); }

/* ---- Sections ---- */
section.band { padding: 56px 0; }
.kicker { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink3); font-weight: 600; }
h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(28px, 5vw, 38px); letter-spacing: -0.01em; line-height: 1.12; margin: 12px 0 0; }
.lead { font-size: 18px; color: var(--ink2); max-width: 56ch; margin: 18px 0 0; }

/* two-state metaphor */
.states { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 30px; }
@media (max-width: 620px) { .states { grid-template-columns: 1fr; } }
.state {
  padding: 26px; border-radius: 22px; border: 1px solid var(--line2);
  background: var(--card);
}
.state.twi { background: linear-gradient(160deg, var(--card), var(--twi2)); }
.state.amb { background: linear-gradient(160deg, var(--card), var(--amber2)); }
.state h3 { font-family: var(--serif); font-weight: 500; font-size: 21px; margin: 14px 0 6px; }
.state p { margin: 0; color: var(--ink2); font-size: 15.5px; }

/* feature grid */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 30px; }
@media (max-width: 620px) { .features { grid-template-columns: 1fr; } }
.feature {
  padding: 24px; border-radius: 20px; background: var(--card);
  border: 1px solid var(--line2);
}
.feature .ic { width: 42px; height: 42px; border-radius: 12px; background: var(--twi2); display: flex; align-items: center; justify-content: center; }
.feature h3 { font-family: var(--serif); font-weight: 500; font-size: 19px; margin: 16px 0 6px; }
.feature p { margin: 0; color: var(--ink2); font-size: 15px; }

/* promise / no-list */
.promise { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-size: 14.5px; color: var(--ink2);
  padding: 9px 16px; border-radius: 100px;
  background: var(--card); border: 1px solid var(--line);
}
.chip b { color: var(--ink); font-weight: 600; }

/* ---- Article (privacy / support / terms) ---- */
.article { padding: 48px 0 72px; }
.article .doc { max-width: 720px; margin: 0 auto; }
.article h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(32px, 6vw, 44px); margin: 8px 0 4px; }
.article .updated { color: var(--ink3); font-size: 14px; }
.article h2 { font-size: 23px; margin-top: 40px; }
.article h3 { font-family: var(--serif); font-weight: 500; font-size: 19px; margin-top: 28px; margin-bottom: 6px; }
.article p, .article li { color: var(--ink2); font-size: 16.5px; }
.article ul { padding-left: 22px; }
.article li { margin: 7px 0; }
.article strong { color: var(--ink); }
.callout {
  margin: 24px 0; padding: 18px 20px; border-radius: 16px;
  background: var(--twi2); border: 1px solid var(--line2);
}
.callout p { margin: 0; color: var(--ink); }
.lang-note { color: var(--ink3); font-size: 14px; font-style: italic; margin-top: 6px; }
hr.cn-split { border: none; border-top: 1px dashed var(--line); margin: 52px 0 40px; }

/* faq */
.faq details {
  border: 1px solid var(--line2); border-radius: 16px; background: var(--card);
  padding: 4px 20px; margin: 12px 0;
}
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 16.5px; color: var(--ink);
  padding: 14px 0; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; float: right; color: var(--ink3); font-weight: 400; font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: '–'; }
.faq details p { margin: 0 0 16px; color: var(--ink2); font-size: 15.5px; }

/* ---- Footer ---- */
footer { border-top: 1px solid var(--line2); padding: 40px 0 56px; margin-top: 40px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
footer .col-links { display: flex; gap: 24px; font-size: 15px; }
footer .col-links a { color: var(--ink2); }
footer .fine { color: var(--ink3); font-size: 13.5px; max-width: 38ch; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; align-items: center; }