/* 占星骰子：柔和的占星風格（米白、深藍紫、珊瑚橘）；夜間自動切換為深藍夜空 */
:root {
  --bg: #f8f5f2;
  --band: #ffffff;
  --surface: #ffffff;
  --surface-2: #f3eef8;
  --ink: #26264a;
  --ink-soft: #5b5b78;
  --line: #e6e0ea;
  --coral: #e8907a;
  --coral-soft: #fbe3da;
  --coral-ink: #b44a33;
  --chip-bg: #efe9f8;
  --chip-ink: #3d3470;
  --error-bg: #fdecea;
  --error-ink: #9b1c1c;
  --shadow: 0 10px 30px rgba(38, 38, 74, .08);
  --font-serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system, BlinkMacSystemFont, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15152b;
    --band: #1a1a34;
    --surface: #202040;
    --surface-2: #29294d;
    --ink: #f3efe9;
    --ink-soft: #b8b6d0;
    --line: #36365e;
    --coral: #f0a08a;
    --coral-soft: #3b2c45;
    --coral-ink: #f4b3a1;
    --chip-bg: #2f2d5c;
    --chip-ink: #d9d3ff;
    --error-bg: #3a1c1c;
    --error-ink: #ffb4b4;
    --shadow: 0 10px 30px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
}
h1, h2, h3 { font-family: var(--font-serif); line-height: 1.4; margin: 0; }
p { margin: 0; }
a { color: inherit; }
.container { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.muted { color: var(--ink-soft); font-size: .92rem; }

/* 導覽列 */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 8px max(16px, calc((100vw - 1040px) / 2));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px;
  font-family: var(--font-serif); font-weight: 700; font-size: 1.2rem;
  text-decoration: none; color: var(--ink);
}
.brand-mark { color: var(--coral); }
.nav nav { display: flex; gap: 4px; }
.nav nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px;
  border-radius: 999px; text-decoration: none; color: var(--ink-soft); font-size: .95rem;
}
.nav nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav nav a.home-link { border: 1px solid var(--line); gap: .4em; }
.home-ic { flex: none; }
.home-link[hidden] { display: none !important; }
.footer .home-link { display: inline-flex; align-items: center; gap: .4em; min-height: 44px; color: var(--ink); text-underline-offset: 3px; }

/* 按鈕 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 1.4rem;
  font: inherit; font-weight: 700; text-decoration: none;
  border-radius: 999px; border: 2px solid var(--ink);
  background: transparent; color: var(--ink); cursor: pointer;
  transition: background .2s, color .2s, transform .2s;
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn.primary { background: var(--coral); border-color: var(--coral); color: #26264a; }
.btn.primary:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn:disabled:hover { background: var(--coral); border-color: var(--coral); color: #26264a; }
.btn:active:not(:disabled) { transform: translateY(1px); }
a:focus-visible, button:focus-visible, textarea:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 3px solid var(--coral); outline-offset: 2px;
}

/* 首頁主視覺 */
.hero {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: 1fr; gap: 8px; align-items: center;
  padding: 40px max(16px, calc((100vw - 1040px) / 2)) 96px;
  background:
    radial-gradient(circle at 85% 20%, color-mix(in srgb, var(--coral) 22%, transparent), transparent 45%),
    radial-gradient(circle at 10% 90%, color-mix(in srgb, #8c7ae6 16%, transparent), transparent 45%),
    var(--bg);
}
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .3em; color: var(--coral-ink); margin-bottom: 10px; }
.hero h1 { font-size: clamp(2rem, 7vw, 3.2rem); letter-spacing: .04em; }
.hero-sub { margin-top: 14px; color: var(--ink-soft); max-width: 30em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero-art { width: min(340px, 80%); height: auto; justify-self: center; color: var(--ink); }
.hero-art .moons { color: var(--ink); }
.hero-art .spark { color: var(--coral); }
.wave { position: absolute; left: 0; bottom: -1px; width: 100%; height: 56px; display: block; }
@media (min-width: 860px) {
  .hero { grid-template-columns: 1.1fr .9fr; padding-top: 72px; padding-bottom: 120px; }
  .hero-art { width: min(420px, 100%); }
}
@media (prefers-reduced-motion: no-preference) {
  .hero-art .spark { animation: twinkle 3.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .hero-art .spark:nth-of-type(2) { animation-delay: .8s; }
  .hero-art .spark:nth-of-type(3) { animation-delay: 1.6s; }
  .hero-art .spark:nth-of-type(4) { animation-delay: 2.2s; }
}
@keyframes twinkle { 0%, 100% { opacity: .35; transform: scale(.8); } 50% { opacity: 1; transform: scale(1.15); } }

/* 區塊 */
.band { background: var(--band); padding: 48px 0 64px; scroll-margin-top: 56px; }
.section-title { font-size: clamp(1.5rem, 4.5vw, 2rem); text-align: center; letter-spacing: .06em; }
.section-sub { text-align: center; color: var(--ink-soft); margin: 8px auto 28px; max-width: 34em; }

/* 卡片 */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.card h3 { font-size: 1.15rem; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.step {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--coral); color: #26264a;
  font-family: var(--font-sans); font-size: .95rem; font-weight: 700; flex: none;
}
textarea {
  width: 100%; font: inherit; color: inherit;
  background: var(--bg); border: 1.5px solid var(--line);
  border-radius: 14px; padding: .7rem .9rem; resize: vertical;
}
#prompt-out { font-size: .85rem; line-height: 1.55; }
.hint { color: var(--ink-soft); font-size: .88rem; margin-top: 8px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 14px; }
.optional { margin-top: 12px; }
.optional summary { cursor: pointer; color: var(--ink-soft); font-size: .92rem; min-height: 44px; display: flex; align-items: center; }
.optional textarea { margin-top: 6px; }
.format { border: 1.5px solid var(--line); border-radius: 14px; margin: 12px 0; padding: 6px 14px 10px; }
.format legend { font-size: .85rem; color: var(--ink-soft); padding: 0 6px; }
.format label { display: flex; align-items: center; gap: 8px; min-height: 40px; font-size: .95rem; cursor: pointer; }
.format input { accent-color: var(--coral); width: 18px; height: 18px; }

/* 骰子舞台 */
.tray {
  margin: 0 0 8px;
  border-radius: 20px;
  background:
    radial-gradient(ellipse at 50% 100%, color-mix(in srgb, var(--coral) 18%, transparent), transparent 62%),
    var(--surface-2);
}
.tray canvas { display: block; width: 100%; aspect-ratio: 2.1 / 1; }
.style-switch { display: flex; align-items: center; justify-content: center; gap: 6px; padding: 0 0 12px; flex-wrap: wrap; }
.style-label { font-size: .85rem; color: var(--ink-soft); margin-right: 4px; }
.style-switch button {
  font: inherit; font-size: .9rem; min-height: 44px; padding: 0 1.1rem;
  border-radius: 999px; border: 1.5px solid var(--line);
  background: var(--surface); color: var(--ink); cursor: pointer;
}
.style-switch button[aria-pressed="true"] { background: var(--coral); border-color: var(--coral); color: #26264a; font-weight: 700; }
.style-switch button:hover:not([aria-pressed="true"]) { border-color: var(--coral); }

/* 骰子結果卡 */
.dice { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.die {
  border: 1.5px solid var(--line); border-radius: 18px; padding: 14px;
  display: flex; flex-direction: column; gap: 8px; background: var(--bg);
}
.die .kind { font-size: .8rem; font-weight: 700; letter-spacing: .15em; color: var(--coral-ink); }
.die .value { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 700; }
.die .desc { font-size: .9rem; color: var(--ink-soft); margin: 0; flex: 1; }
.die.rolling .value { opacity: .5; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { background: var(--chip-bg); color: var(--chip-ink); border-radius: 999px; padding: 1px 10px; font-size: .8rem; }
.theme {
  margin-top: 16px; padding: 12px 16px; border-radius: 16px;
  background: var(--coral-soft); font-family: var(--font-serif); font-weight: 600;
}
.theme:empty { display: none; }
.quick { margin-top: 16px; padding: 16px 18px; border-radius: 16px; background: var(--surface-2); }
.quick h4 { margin: 0 0 8px; font-family: var(--font-serif); font-size: 1.1rem; }
.quick p { margin: 0 0 10px; }
.quick .quick-lead { font-weight: 700; margin-bottom: 4px; }
.quick ul { margin: 0 0 12px; padding-left: 1.2em; }
.quick li + li { margin-top: 4px; }
.quick .muted { margin: 0; }
.notice.error { background: var(--error-bg); color: var(--error-ink); padding: 12px 16px; border-radius: 14px; margin-bottom: 16px; }

/* 怎麼讀骰子 */
.about { padding: 56px 0 64px; }
.trio { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; gap: 14px; }
.trio-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 24px;
  padding: 22px; text-align: center; box-shadow: var(--shadow);
}
.trio-glyph {
  display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--coral-soft); color: var(--coral-ink);
  font-size: 2rem; line-height: 1; margin-bottom: 10px;
  font-family: "Apple Symbols", "Segoe UI Symbol", "Noto Sans Symbols 2", "DejaVu Sans", var(--font-serif);
}
.trio-glyph.num { font-family: var(--font-serif); font-weight: 700; }
.trio-card h3 { font-size: 1.2rem; margin-bottom: 6px; }
.trio-card p { color: var(--ink-soft); font-size: .95rem; }
@media (min-width: 720px) { .trio { grid-template-columns: repeat(3, 1fr); } }

/* 頁尾 */
.footer { border-top: 1px solid var(--line); padding: 28px 0 40px; text-align: center; color: var(--ink-soft); font-size: .85rem; }
.footer p + p { margin-top: 4px; }

@media (max-width: 600px) {
  .dice { grid-template-columns: 1fr; }
  .card { padding: 18px 16px; border-radius: 20px; }
  .nav nav a { padding: 0 8px; font-size: .9rem; }
}
@media (max-width: 440px) {
  .nav nav a.nav-about { display: none; }
}