:root {
  --paper: #f7f5f2;
  --surface: #ffffff;
  --surface-2: #f1eee9;
  --ink: #1c1b1f;
  --ink-2: #4a4750;
  --muted: #7d7984;
  --line: #e4e0d9;
  --accent: #d6402b;
  --accent-ink: #ffffff;
  --accent-soft: #fbe5e1;
  --hd: #1f6feb;
  --hd-soft: #e2edff;
  --sub: #1a7f53;
  --sub-soft: #ddf3e8;
  --shadow: 0 1px 2px rgb(28 27 31 / .04), 0 4px 16px rgb(28 27 31 / .05);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans", "Noto Sans CJK SC", "Microsoft YaHei", "Noto Sans Thai", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
main { flex: 1; }
a { color: inherit; text-decoration: none; }
h1, h2, p, ol, ul { margin: 0; }
svg { display: block; width: 1.15em; height: 1.15em; flex-shrink: 0; }
.mono { font-family: var(--mono); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: 880px; margin: 0 auto; padding: 0 16px; }

/* ------------------------------------------------ top bar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; letter-spacing: -.01em; white-space: nowrap; }
.brand-mark { width: 26px; height: 26px; color: var(--accent); transform: rotate(180deg); }
.brand em { font-style: normal; color: var(--accent); }
.nav { display: flex; align-items: center; gap: 4px; font-size: 14px; min-width: 0; }
.nav > a { padding: 6px 10px; border-radius: 8px; color: var(--ink-2); white-space: nowrap; }
.nav > a:hover { background: var(--surface-2); color: var(--ink); }
.nav .nav-hot { color: var(--accent); font-weight: 600; }

.lang { position: relative; }
.lang summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px;
  padding: 6px 10px; border-radius: 8px; color: var(--ink-2); user-select: none;
}
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover, .lang[open] summary { background: var(--surface-2); color: var(--ink); }
.lang ul {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 160px;
  list-style: none; padding: 6px; background: var(--surface);
  border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
}
.lang li a { display: block; padding: 7px 12px; border-radius: 8px; }
.lang li a:hover { background: var(--surface-2); }
.lang li a[aria-current] { color: var(--accent); font-weight: 600; }

@media (max-width: 560px) {
  .brand span { display: none; }
  .nav > a { padding: 6px 7px; }
  .lang summary span { display: none; }
}

/* ------------------------------------------------ hero / search */
.hero { padding: 56px 0 28px; }
.hero-compact { padding: 24px 0 8px; }
.hero-title {
  font-size: clamp(26px, 5vw, 40px); line-height: 1.2; font-weight: 800;
  letter-spacing: -.02em; text-align: center; margin-bottom: 24px;
}

.search {
  position: relative; display: flex; align-items: center;
  background: var(--surface); border: 1.5px solid var(--line); border-radius: 999px;
  box-shadow: var(--shadow); padding: 5px; transition: border-color .15s, box-shadow .15s;
}
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow); }
.search-icon { margin-left: 14px; color: var(--muted); width: 20px; height: 20px; }
.search input {
  flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink);
  font: 600 17px/1 var(--mono); letter-spacing: .02em; padding: 12px 12px; outline: none;
}
.search input::placeholder { font-family: var(--sans); font-weight: 400; color: var(--muted); letter-spacing: 0; }
.search input::-webkit-search-cancel-button { display: none; }
.search button {
  border: 0; cursor: pointer; border-radius: 999px; padding: 12px 24px;
  background: var(--accent); color: var(--accent-ink); font: 600 15px/1 var(--sans);
  transition: filter .15s, transform .05s;
}
.search button:hover { filter: brightness(1.08); }
.search button:active { transform: scale(.97); }

.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; }
.chips-center { justify-content: center; }
.chips-label { font-size: 13px; color: var(--muted); margin-right: 2px; }
.chip {
  font: 500 13px/1 var(--mono); padding: 7px 11px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-2);
  transition: border-color .15s, color .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* ------------------------------------------------ content */
.content { display: flex; flex-direction: column; gap: 16px; padding-top: 16px; padding-bottom: 48px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.ad:empty, ins.adsbygoogle[data-ad-status="unfilled"] { display: none !important; }

.prose { padding: 24px 28px; color: var(--ink-2); }
.prose h2 { font-size: 19px; color: var(--ink); margin-bottom: 12px; line-height: 1.4; }
.prose p + p { margin-top: 10px; }
.prose ol { margin: 12px 0; padding-left: 1.4em; display: grid; gap: 6px; }
.prose li::marker { color: var(--accent); font-weight: 700; }
.prose .note { font-size: 14px; color: var(--muted); }
.howto summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; }
.howto summary::-webkit-details-marker { display: none; }
.howto summary h2 { margin: 0; }
.howto summary::after { content: "+"; font-size: 22px; color: var(--muted); line-height: 1; }
.howto[open] summary::after { content: "−"; }
.howto[open] summary { margin-bottom: 12px; }

.empty { padding: 40px 24px; text-align: center; }
.empty-icon { width: 44px; height: 44px; margin: 0 auto 12px; color: var(--muted); }
.empty h1 { font-size: 20px; margin-bottom: 6px; }
.empty p { color: var(--muted); }

.results-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.results-head h1 { font-size: 24px; letter-spacing: .01em; overflow-wrap: anywhere; }
.count { color: var(--muted); font-size: 14px; }

.promo {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 12px;
  background: linear-gradient(100deg, var(--accent-soft), color-mix(in srgb, var(--hd-soft) 70%, var(--accent-soft)));
  color: var(--accent); font-weight: 600; font-size: 15px;
}
.promo span { flex: 1; }
.promo-arrow { transition: transform .2s; }
.promo:hover .promo-arrow { transform: translateX(3px); }

.results { list-style: none; padding: 0; display: grid; gap: 12px; }
.result { padding: 16px 18px; transition: border-color .15s; }
.result:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.result-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px 16px; flex-wrap: wrap; margin-bottom: 12px; }
.result-title { font-size: 16px; font-weight: 600; line-height: 1.45; overflow-wrap: anywhere; min-width: 0; flex: 1 1 260px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font: 600 12px/1 var(--sans); padding: 5px 8px; border-radius: 6px; white-space: nowrap;
  background: var(--surface-2); color: var(--ink-2);
}
.tag-hd { background: var(--hd-soft); color: var(--hd); }
.tag-sub { background: var(--sub-soft); color: var(--sub); }
.tag-muted { font-family: var(--mono); font-weight: 500; color: var(--muted); }

.result-link { display: flex; gap: 8px; align-items: stretch; }
.result-link input {
  flex: 1; min-width: 0; font-size: 13px; color: var(--ink-2);
  background: var(--surface-2); border: 1px solid transparent; border-radius: 10px; padding: 9px 12px; outline: none;
  text-overflow: ellipsis;
}
.result-link input:focus { border-color: var(--line); color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap;
  padding: 0 14px; min-height: 40px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  font: 600 14px/1 var(--sans); transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--surface-2); }
.btn.done { border-color: var(--sub); color: var(--sub); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.08); }

@media (max-width: 560px) {
  .hero { padding-top: 36px; }
  .search button { padding: 12px 18px; }
  .prose { padding: 20px; }
  .result { padding: 14px; }
  .result-link { flex-wrap: wrap; }
  .result-link input { flex-basis: 100%; }
  .result-link .btn { flex: 1; }
}

/* ------------------------------------------------ footer / toast */
.footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; padding: 20px 0; text-align: center; }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--ink); color: var(--paper); padding: 10px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  transition: opacity .2s, transform .2s; z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}