/* 一縷仙緣 Wisp of Immortality — 官網共用樣式
   水墨紙色調;不用任何外部字型或 CDN,全部用系統內建字型。
   手機優先:預設就是窄螢幕排版,寬螢幕再加寬。 */

:root {
  --paper: #f3ecd8;
  --paper-alt: #ece1c6;
  --paper-card: #faf5e7;
  --ink: #2b2621;
  --ink-soft: #5b5347;
  --ink-faint: #8a8072;
  --line: #d8cbaa;
  --jade: #3f6c5c;
  --jade-dark: #2c4d41;
  --indigo: #3c4a68;
  --ochre: #a97a4c;
  --gold: #a8791f;
  --vermillion: #ab3a2e;
  --max-w: 880px;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(43, 38, 33, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #211d18;
    --paper-alt: #2a251e;
    --paper-card: #2a251e;
    --ink: #ece4d2;
    --ink-soft: #cbbfa8;
    --ink-faint: #948974;
    --line: #4a4130;
    --jade: #7fb39f;
    --jade-dark: #5c8a78;
    --indigo: #8b9bc0;
    --ochre: #d1a06a;
    --gold: #d4ab4a;
    --vermillion: #e08072;
    --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --paper: #211d18;
  --paper-alt: #2a251e;
  --paper-card: #2a251e;
  --ink: #ece4d2;
  --ink-soft: #cbbfa8;
  --ink-faint: #94897d;
  --line: #4a4130;
  --jade: #7fb39f;
  --jade-dark: #5c8a78;
  --indigo: #8b9bc0;
  --ochre: #d1a06a;
  --gold: #d4ab4a;
  --vermillion: #e08072;
  --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(63, 108, 92, 0.07), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(171, 58, 46, 0.05), transparent 40%),
    repeating-linear-gradient(0deg, rgba(43, 38, 33, 0.015) 0px, rgba(43, 38, 33, 0.015) 1px, transparent 1px, transparent 3px);
  color: var(--ink);
  font-family: "Noto Serif TC", "Noto Serif SC", "PMingLiU", "Songti TC", "Microsoft JhengHei",
    "Microsoft YaHei", Georgia, "Times New Roman", serif;
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--jade-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover,
a:focus {
  color: var(--vermillion);
}

::selection {
  background: var(--gold);
  color: #2b2621;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6em 1em;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5em;
  top: 0.5em;
}

/* ---------- layout shell ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper-alt);
}

.site-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.9rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  text-decoration: none;
  color: var(--ink);
}

.brand .brand-mark {
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--vermillion);
}

.brand .brand-name {
  font-size: 1.3rem;
  font-weight: 700;
}

.brand .brand-sub {
  font-size: 0.78rem;
  color: var(--ink-faint);
}

nav.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  font-size: 0.95rem;
}

nav.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.3rem 0.15rem;
  border-bottom: 2px solid transparent;
}

nav.site-nav a:hover,
nav.site-nav a[aria-current="page"] {
  color: var(--jade-dark);
  border-bottom-color: var(--jade-dark);
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.75rem 1.1rem 3rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-alt);
  color: var(--ink-faint);
  font-size: 0.85rem;
}

.site-footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.4rem 1.1rem 2rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1rem;
  margin-bottom: 0.7rem;
}

.site-footer a {
  color: var(--ink-soft);
}

/* ---------- typography ---------- */

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 700;
  line-height: 1.4;
}

h1 {
  font-size: 1.9rem;
  margin: 0 0 0.6rem;
}

h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
}

h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0.5rem;
}

h3 {
  font-size: 1.12rem;
  margin: 1.4rem 0 0.5rem;
  color: var(--jade-dark);
}

p {
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.tag-draft {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--vermillion);
  border: 1px solid var(--vermillion);
  border-radius: 999px;
  padding: 0.1em 0.7em;
  margin-bottom: 1rem;
}

.callout {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ochre);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin: 1.1rem 0;
  box-shadow: var(--shadow);
}

.callout.warn {
  border-left-color: var(--vermillion);
}

.callout.notice-tw {
  border-left-color: var(--gold);
  font-weight: 700;
}

/* ---------- tables ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 420px;
  background: var(--paper-card);
  font-size: 0.95rem;
}

caption {
  text-align: left;
  padding: 0.5rem 0.8rem;
  color: var(--ink-faint);
  font-size: 0.85rem;
}

th, td {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--line);
}

thead th {
  background: var(--paper-alt);
  color: var(--jade-dark);
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75em 1.5em;
  border-radius: 999px;
  border: 1px solid var(--jade-dark);
  background: var(--jade-dark);
  color: var(--paper-card);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.btn:hover,
.btn:focus {
  background: var(--jade);
  border-color: var(--jade);
  color: #fff;
}

.btn[aria-disabled="true"] {
  background: transparent;
  color: var(--ink-faint);
  border-style: dashed;
  border-color: var(--ink-faint);
  box-shadow: none;
  cursor: not-allowed;
}

.btn.btn-secondary {
  background: transparent;
  color: var(--jade-dark);
}

.btn.btn-secondary:hover {
  background: var(--paper-card);
  color: var(--vermillion);
  border-color: var(--vermillion);
}

.btn-note {
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-top: 0.5rem;
}

/* ---------- language switch tabs ---------- */

.lang-switch {
  display: flex;
  gap: 0.4rem;
  margin: 0.2rem 0 1.4rem;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  background: var(--paper);
  padding: 0.6rem 0;
  z-index: 5;
}

.lang-switch button {
  font-family: inherit;
  font-size: 0.92rem;
  padding: 0.4em 1.1em;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper-card);
  color: var(--ink-soft);
  cursor: pointer;
}

.lang-switch button[aria-selected="true"] {
  background: var(--jade-dark);
  border-color: var(--jade-dark);
  color: var(--paper-card);
}

.lang-panel[hidden] {
  display: none;
}

/* ---------- home page ---------- */

.hero {
  text-align: center;
  padding: 2.2rem 0 1.4rem;
}

.hero .brand-mark {
  color: var(--vermillion);
  letter-spacing: 0.15em;
  font-size: 0.95rem;
}

.hero h1 {
  font-size: 2.1rem;
  margin: 0.4rem 0 0.2rem;
}

.hero .hero-sub {
  color: var(--ink-faint);
  font-size: 1rem;
  margin-bottom: 1.1rem;
}

.hero .tagline {
  max-width: 46em;
  margin: 0 auto 1.6rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.6rem 0;
}

.feature-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}

.feature-card h3 {
  margin-top: 0;
}

.feature-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

hr.brush {
  border: none;
  border-top: 2px solid var(--line);
  margin: 2rem 0;
  position: relative;
}

/* ---------- media kit placeholders ---------- */

.placeholder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.8rem;
}

.placeholder-card {
  border: 1.5px dashed var(--ink-faint);
  border-radius: var(--radius);
  background: var(--paper-card);
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0.8rem;
  color: var(--ink-faint);
  font-size: 0.88rem;
  gap: 0.3rem;
}

.placeholder-card strong {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.placeholder-card.tall {
  aspect-ratio: 3 / 4;
}

.placeholder-card.wide {
  aspect-ratio: 21 / 9;
}

.fact-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 1rem;
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  box-shadow: var(--shadow);
}

.fact-list dt {
  color: var(--ink-faint);
  font-size: 0.88rem;
  white-space: nowrap;
}

.fact-list dd {
  margin: 0;
}

/* ---------- utility ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.small {
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.center {
  text-align: center;
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  h1 {
    font-size: 1.55rem;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  table {
    font-size: 0.86rem;
  }

  th, td {
    padding: 0.45rem 0.55rem;
  }
}