/* 嘉蘭學習島 — layout: one living landscape (sky follows Taiwan time) on top, paper-like learning panels below */
:root {
  --paper: #F3F6F2;      /* page ground: misty morning over the Pacific */
  --card: #FFFFFF;
  --ink: #1D2B30;
  --ink-soft: #52646A;
  --line: #D5DFDA;
  --pacific: #17607A;    /* accent: deep Pacific */
  --pacific-soft: #DCEDF1;
  --sun: #F2A23A;        /* warm highlight */
  --good: #2E8B57;
  --bad: #C0473B;
  --font-display: "Huninn", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-kai: "LXGW WenKai TC", "BiauKai", "DFKai-SB", "標楷體", "Kaiti TC", serif;
  --radius: 14px;
  --sky-top: #5FA8E0;
  --sky-bot: #CDE8F2;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0F1A20; --card: #17252C; --ink: #E6EEEB; --ink-soft: #9DB0B2; --line: #2A3B42;
    --pacific: #6CC3DD; --pacific-soft: #1C3640; --sun: #F5B65A; --good: #5CC08A; --bad: #EE7A6E;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0F1A20; --card: #17252C; --ink: #E6EEEB; --ink-soft: #9DB0B2; --line: #2A3B42;
  --pacific: #6CC3DD; --pacific-soft: #1C3640; --sun: #F5B65A; --good: #5CC08A; --bad: #EE7A6E;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--paper); color: var(--ink);
  font-family: var(--font-body); font-size: 17px; line-height: 1.7;
  -webkit-tap-highlight-color: transparent;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--card); }
a { color: var(--pacific); }
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.3; text-wrap: balance; margin: 0; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--card); border-bottom: 1px solid var(--line);
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 8px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand b { font-family: var(--font-display); font-size: 1.35rem; letter-spacing: .06em; }
.clock {
  margin-left: auto; display: flex; align-items: center; gap: 8px;
  font-size: .9rem; color: var(--ink-soft); font-variant-numeric: tabular-nums;
  background: var(--pacific-soft); border-radius: 999px; padding: 4px 12px;
}
.clock .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--sun); flex: none; }
.clock.preview { background: var(--sun); color: #1D2B30; }
.toplink { font-size: .9rem; text-decoration: none; color: var(--ink-soft); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; }
.toplink:hover { color: var(--pacific); border-color: var(--pacific); }

/* ---------- shared wrappers ---------- */
.wrap {
  max-width: 1100px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 20px 40px;
}
.scene-box { position: relative; background: var(--sky-top); overflow: hidden; }
.scene-box svg.scene { display: block; width: 100%; height: auto; overflow: hidden; }
.scene-box .fx { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hit { cursor: pointer; }
.scene .win { fill: var(--win, #CFE3EE); transition: fill 1s; }
svg .win { fill: var(--win, #CFE3EE); }
.hit:focus-visible { outline: none; }
.hit:focus-visible .lift, .hit:hover .lift { transform: translateY(-6px); }
.lift { transition: transform .25s ease; transform-box: fill-box; }
.locked-tag { font-family: var(--font-display); }

.crumbs { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-size: .92rem; color: var(--ink-soft); margin-bottom: 14px; }
.crumbs a { text-decoration: none; }
.crumbs span.sep { opacity: .5; }

.big-title { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; }
.big-title h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); }
.chip { display: inline-flex; align-items: center; gap: 4px; font-size: .85rem; padding: 2px 10px; border-radius: 999px; background: var(--pacific-soft); color: var(--pacific); font-weight: 600; }
.lede { color: var(--ink-soft); margin: 4px 0 18px; max-width: 62ch; }

/* speak button */
.say {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 6px 14px; border-radius: 999px; border: 2px solid var(--pacific);
  background: transparent; color: var(--pacific); cursor: pointer; font-weight: 700; font-size: .95rem;
}
.say svg { width: 20px; height: 20px; }
.say:hover, .say.on { background: var(--pacific); color: var(--card); }
.say.icon { padding: 6px; min-width: 44px; }

/* ---------- home: island buttons ---------- */
.intro-row { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; justify-content: space-between; margin-bottom: 18px; }
.intro-row p { margin: 4px 0 0; color: var(--ink-soft); max-width: 60ch; }
.grade-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.grade-btn {
  display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink);
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 12px 14px; min-height: 72px;
  transition: border-color .2s, transform .2s;
}
.grade-btn:hover { border-color: var(--g); transform: translateY(-2px); }
.grade-btn .num { width: 46px; height: 46px; flex: none; border-radius: 50%; background: var(--g); color: #fff; display: grid; place-items: center; font-family: var(--font-display); font-size: 1.5rem; }
.grade-btn b { font-family: var(--font-display); font-size: 1.15rem; display: block; }
.grade-btn small { color: var(--ink-soft); font-size: .8rem; }
.notice-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 18px; }
.notice { display: flex; gap: 12px; align-items: center; padding: 12px 14px; border: 2px dashed var(--line); border-radius: var(--radius); color: var(--ink-soft); background: transparent; cursor: pointer; text-align: left; }
.notice b { color: var(--ink); font-family: var(--font-display); font-size: 1.05rem; }
.notice svg { width: 40px; height: 40px; flex: none; }

/* ---------- island page ---------- */
.subject-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.subj-btn {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center;
  text-decoration: none; color: var(--ink); background: var(--card); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 12px 10px 14px; min-height: 140px; cursor: pointer;
}
.subj-btn svg { width: 86px; height: 86px; }
.subj-btn b { font-family: var(--font-display); font-size: 1.2rem; }
.subj-btn small { font-size: .78rem; color: var(--ink-soft); }
.subj-btn.open { border-color: var(--s); box-shadow: 0 4px 0 var(--s); }
.subj-btn.open small { color: var(--s); font-weight: 700; }
.subj-btn.closed svg { filter: grayscale(.7); opacity: .65; }
.subj-btn:hover { transform: translateY(-2px); }

/* ---------- subject page ---------- */
.subject-head { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; padding: 16px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); margin-bottom: 20px; }
.subject-head svg { width: 92px; height: 92px; flex: none; }
.subject-head > div { min-width: 0; flex: 1; }
.unit { margin-bottom: 22px; }
.unit h2 { font-size: 1.15rem; margin-bottom: 10px; color: var(--ink-soft); letter-spacing: .08em; }
.lesson-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.lesson-card {
  display: grid; grid-template-columns: 52px 1fr; gap: 12px; align-items: center;
  padding: 12px; border-radius: var(--radius); border: 2px solid var(--line); background: var(--card);
  text-decoration: none; color: var(--ink); min-height: 80px;
}
.lesson-card .no { width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center; font-family: var(--font-kai); font-size: 1.3rem; background: var(--pacific-soft); color: var(--ink-soft); }
.lesson-card b { font-family: var(--font-display); font-size: 1.08rem; display: block; line-height: 1.35; }
.lesson-card small { color: var(--ink-soft); font-size: .8rem; }
.lesson-card > div { min-width: 0; }
.lesson-card.open { border-color: var(--s); }
.lesson-card.open .no { background: var(--s); color: #fff; }
.lesson-card.closed { opacity: .62; border-style: dashed; }
.stars { color: var(--sun); letter-spacing: 2px; font-size: .95rem; }

/* ---------- lesson page ---------- */
.lesson-hero { border-radius: var(--radius); padding: 18px; margin-bottom: 16px; background: linear-gradient(180deg, var(--sky-top), var(--sky-bot)); color: #10232A; position: relative; overflow: hidden; }
.lesson-hero .meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.lesson-hero .chip { background: rgba(255,255,255,.75); color: #10232A; }
.lesson-hero h1 { font-family: var(--font-kai); font-size: clamp(2rem, 6vw, 3rem); font-weight: 700; letter-spacing: .12em; }
.lesson-hero .unitname { font-size: .9rem; font-weight: 700; opacity: .8; }
.lesson-hero.night { color: #EEF3FF; }
.lesson-hero.night .chip { background: rgba(10,20,40,.55); color: #EEF3FF; }

.tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 16px; scrollbar-width: thin; }
.tab {
  flex: none; min-height: 48px; padding: 8px 16px; border-radius: 999px; border: 2px solid var(--line); background: var(--card);
  cursor: pointer; font-family: var(--font-display); font-size: 1.02rem; display: inline-flex; align-items: center; gap: 6px;
}
.tab[aria-selected="true"] { background: var(--s); border-color: var(--s); color: #fff; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.panel h2 { font-size: 1.3rem; margin-bottom: 10px; }
.panel h3 { font-size: 1.05rem; margin: 18px 0 8px; color: var(--s); }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.goal-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.goal-list li { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 10px; background: var(--pacific-soft); }
.goal-list li::before { content: ""; width: 12px; height: 12px; margin-top: 8px; border-radius: 3px; background: var(--s); flex: none; transform: rotate(45deg); }
.quote { font-family: var(--font-kai); font-size: 1.25rem; border-left: 4px solid var(--s); padding: 4px 0 4px 14px; margin: 10px 0; }
.quote small { display: block; font-family: var(--font-body); font-size: .85rem; color: var(--ink-soft); }
.kv { display: grid; grid-template-columns: 4.5em 1fr; gap: 6px 12px; margin: 0; }
.kv dt { font-weight: 700; color: var(--s); }
.kv dd { margin: 0; min-width: 0; }

/* poem */
.poem { font-family: var(--font-kai); font-size: clamp(1.25rem, 3.6vw, 1.6rem); line-height: 1.9; }
.stanza { margin: 0 0 18px; padding: 12px 14px; border-radius: 12px; background: var(--pacific-soft); }
.stanza .shead { font-family: var(--font-display); font-size: .95rem; color: var(--s); display: flex; gap: 8px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.stanza .gist { font-family: var(--font-body); font-size: .9rem; color: var(--ink-soft); margin: 6px 0 0; display: none; }
.show-gist .stanza .gist { display: block; }
.pline { display: block; cursor: pointer; border-radius: 8px; padding: 0 6px; margin: 0 -6px; transition: background .2s; }
.pline:hover { background: rgba(242,162,58,.18); }
.pline.reading { background: var(--sun); color: #1D2B30; }
.poem-text mark { background: transparent; color: var(--s); font-weight: 700; }

/* characters */
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 10px; }
.char-btn {
  aspect-ratio: 1; max-width: 100%; border-radius: 12px; border: 2px solid var(--line); background: var(--card); cursor: pointer;
  display: grid; grid-template-rows: 1fr auto; justify-items: center; align-items: center; padding: 6px 4px;
}
.char-btn .c { font-family: var(--font-kai); font-size: 2.6rem; line-height: 1; text-align: center; }
.char-btn .zy { font-size: .85rem; color: var(--ink-soft); line-height: 1.2; }
.char-btn[aria-pressed="true"] { border-color: var(--s); background: var(--pacific-soft); }
.char-detail { margin-top: 14px; display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; padding: 16px; border: 2px solid var(--s); border-radius: var(--radius); }
.char-detail > div { min-width: 0; }
.tian {
  width: 132px; height: 132px; position: relative; border: 2px solid var(--s); display: grid; place-items: center;
  font-family: var(--font-kai); font-size: 6.4rem; line-height: 1;
  background:
    linear-gradient(var(--s), var(--s)) center/100% 1px no-repeat,
    linear-gradient(var(--s), var(--s)) center/1px 100% no-repeat;
  background-color: var(--card);
}
.tian::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(var(--card), var(--card)); opacity: 0; }
.char-zy { font-size: 1.3rem; font-weight: 700; color: var(--s); }
.pill-list { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; background: var(--paper); cursor: pointer; font-family: var(--font-kai); font-size: 1.15rem; min-height: 40px; }
.pill:hover { border-color: var(--s); }
.warn { margin-top: 10px; padding: 8px 12px; border-radius: 10px; background: rgba(242,162,58,.18); font-size: .95rem; }

/* words */
.word-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 10px; }
.word { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; display: grid; grid-template-columns: 1fr auto; gap: 4px 8px; align-items: start; }
.word b { font-family: var(--font-kai); font-size: 1.35rem; }
.word p { grid-column: 1 / -1; margin: 0; font-size: .95rem; }
.word p.ex { color: var(--ink-soft); font-size: .9rem; }

/* think cards */
.think { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; }
.think p { margin: 0 0 8px; font-weight: 600; }
.think .ans { margin-top: 8px; padding: 10px 12px; background: var(--pacific-soft); border-radius: 10px; font-size: .95rem; font-weight: 400; }
.btn {
  min-height: 48px; padding: 8px 18px; border-radius: 999px; border: none; background: var(--s, var(--pacific)); color: #fff; cursor: pointer;
  font-family: var(--font-display); font-size: 1.05rem; display: inline-flex; align-items: center; gap: 8px;
}
.btn.ghost { background: transparent; color: var(--ink); border: 2px solid var(--line); }
.btn:disabled { opacity: .45; cursor: default; }

/* games */
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.match .col { display: grid; gap: 8px; align-content: start; min-width: 0; }
.tile {
  min-height: 52px; border-radius: 12px; border: 2px solid var(--line); background: var(--card); cursor: pointer; padding: 8px 12px;
  font-size: 1.02rem; text-align: left; transition: transform .15s, background .2s, border-color .2s;
}
.tile.kai { font-family: var(--font-kai); font-size: 1.2rem; }
.tile.sel { border-color: var(--sun); background: rgba(242,162,58,.16); }
.tile.done { border-color: var(--good); background: color-mix(in srgb, var(--good) 14%, var(--card)); cursor: default; }
.tile.wrong { border-color: var(--bad); animation: shake .35s; }
.tile .tag { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--sun); color: #1D2B30; font-weight: 700; margin-right: 8px; font-size: .9rem; }
@keyframes shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

.quiz-top { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.progress { flex: 1; min-width: 120px; height: 10px; border-radius: 999px; background: var(--pacific-soft); overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--s); border-radius: 999px; transition: width .3s; }
.qtext { font-size: 1.2rem; font-weight: 700; margin: 4px 0 14px; }
.options { display: grid; gap: 10px; }
.options .tile { font-size: 1.1rem; }
.feedback { margin-top: 14px; padding: 12px 14px; border-radius: 12px; font-weight: 600; }
.feedback.ok { background: color-mix(in srgb, var(--good) 15%, var(--card)); color: var(--good); }
.feedback.no { background: color-mix(in srgb, var(--bad) 13%, var(--card)); color: var(--bad); }
.feedback span { display: block; color: var(--ink); font-weight: 400; margin-top: 4px; }
.build-line { min-height: 60px; border: 2px dashed var(--line); border-radius: 12px; padding: 8px; display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; align-items: center; font-family: var(--font-kai); font-size: 1.4rem; }
.result { text-align: center; padding: 20px 10px; }
.result .big-stars { font-size: 3rem; color: var(--sun); letter-spacing: 8px; }

/* teacher */
.qr-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.qr-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; background: var(--card); text-align: center; }
.qr-card .qr { background: #fff; padding: 8px; border-radius: 8px; display: inline-block; }
.qr-card .qr svg, .qr-card .qr img { width: 150px; height: 150px; display: block; }
.qr-card b { display: block; font-family: var(--font-display); margin-top: 6px; }
.qr-card code { font-size: .7rem; word-break: break-all; color: var(--ink-soft); }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.form-row label { display: grid; gap: 4px; font-size: .9rem; color: var(--ink-soft); }
.form-row input, .form-row select { font: inherit; padding: 8px 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); min-height: 44px; }

/* toast / modal */
.toast {
  position: fixed; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%) translateY(calc(100% + 60px)); visibility: hidden;
  background: var(--ink); color: var(--paper); padding: 12px 18px; border-radius: 14px; z-index: 50; max-width: min(92vw, 460px);
  transition: transform .3s ease; font-weight: 600; display: flex; gap: 10px; align-items: center;
}
.toast.show { transform: translateX(-50%) translateY(0); visibility: visible; }

footer.foot {
  border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .8rem;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); padding-block: 14px 24px;
  text-align: center;
}

/* season particles */
.fx span { position: absolute; top: -20px; border-radius: 50% 0 50% 0; opacity: .85; animation: fall linear infinite; }
.fx span.firefly { border-radius: 50%; background: #F9F27A; box-shadow: 0 0 8px 3px rgba(249,242,122,.7); animation: float 6s ease-in-out infinite; top: auto; }
@keyframes fall { to { transform: translate(-80px, 110vh) rotate(540deg); } }
@keyframes float { 0%,100% { transform: translate(0,0); opacity: .2; } 50% { transform: translate(18px,-22px); opacity: 1; } }
@keyframes wave { from { transform: translateX(0); } to { transform: translateX(-120px); } }
@keyframes sail { from { transform: translateX(-160px); } to { transform: translateX(1360px); } }
@keyframes bird { from { transform: translateX(-100px); } to { transform: translateX(1300px); } }
.waves { animation: wave 7s linear infinite; }
.waves.slow { animation-duration: 11s; }
.boat { animation: sail 90s linear infinite; }
.birds { animation: bird 40s linear infinite; }
@media (prefers-reduced-motion: reduce) {
  .waves, .boat, .birds, .fx span { animation: none !important; }
  .fx { display: none; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .brand b { font-size: 1.15rem; }
  .clock { order: 3; margin-left: 0; width: 100%; justify-content: center; }
  .char-detail { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .char-detail .pill-list { justify-content: center; }
  .match { grid-template-columns: 1fr 1fr; }
  .tile { font-size: .95rem; padding: 8px; }
}