/* ═══════════════════════════════════════
   WMI 備賽計畫
   ═══════════════════════════════════════ */

:root {
  --bg:      #fbfcfd;
  --surface: #ffffff;
  --text:    #1e2733;
  --muted:   #66727f;
  --line:    #e2e7ed;
  --navy:    #1e4c8a;
  --navy-lt: #3a6cb0;
  --gold:    #c8912b;
  --diamond: #3aa8b8;
  --danger:  #c4523d;
  --radius: 12px;
  --wrap: 46rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #12161b;
    --surface: #1b2027;
    --text:    #e5eaef;
    --muted:   #97a2ae;
    --line:    #2c333c;
    --navy:    #8ab2e8;
    --navy-lt: #a5c6f0;
    --gold:    #e0b45c;
    --diamond: #6fd0de;
    --danger:  #e08872;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC",
               -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }

/* ── Hero ─────────────────────────────── */

.hero {
  background: linear-gradient(160deg, #16325c, #1e4c8a 55%, #3a6cb0);
  color: #fff;
  padding: 4rem 0 3.25rem;
  text-align: center;
}

.hero .kicker {
  margin: 0 0 .7rem;
  font-size: .74rem;
  letter-spacing: .28em;
  text-indent: .28em;
  opacity: .75;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.9rem, 6vw, 2.9rem);
  line-height: 1.3;
  letter-spacing: .04em;
}

.hero .lede { margin: 0 0 2.25rem; font-size: 1.05rem; line-height: 1.85; opacity: .92; }

/* 三年進度 */
.streak {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .6rem;
  max-width: 30rem;
  margin: 0 auto;
}

.yr {
  background: rgba(255,255,255,.1);
  border: 2px solid rgba(255,255,255,.18);
  border-radius: 10px;
  padding: .8rem .4rem .6rem;
  font-size: .8rem;
  line-height: 1.6;
}

.yr span { display: block; }
.yr .y { font-weight: 800; font-size: 1rem; letter-spacing: .04em; }
.yr .g { opacity: .7; font-size: .74rem; }
.yr .m { font-size: .95rem; margin-top: .2rem; }
.yr .s { opacity: .65; font-size: .72rem; }

.yr.done { background: rgba(200,145,43,.28); border-color: var(--gold); }
.yr.next { background: rgba(255,255,255,.2); border-color: #fff; }

/* ── 目錄 ─────────────────────────────── */

.toc {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.toc .wrap {
  display: flex; gap: .3rem;
  overflow-x: auto; scrollbar-width: none;
  padding-top: .5rem; padding-bottom: .5rem;
}
.toc .wrap::-webkit-scrollbar { display: none; }

.toc a {
  flex: none; padding: .3rem .75rem; border-radius: 99px;
  color: var(--muted); font-size: .85rem; text-decoration: none; white-space: nowrap;
}
.toc a:hover { background: color-mix(in srgb, var(--navy) 13%, transparent); color: var(--navy); }

/* ── 區塊 ─────────────────────────────── */

main { padding-bottom: 2rem; }
section { padding: 3.5rem 0 1.25rem; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: 0; }

h2 {
  margin: 0 0 1.5rem;
  font-size: 1.65rem;
  line-height: 1.45;
  color: var(--navy);
  position: relative;
  padding-left: .9rem;
}
h2::before {
  content: ""; position: absolute; left: 0; top: .35em;
  width: 4px; height: 1.05em; border-radius: 2px; background: var(--navy);
}

h3 { font-size: 1.1rem; margin: 0 0 .6rem; line-height: 1.6; }

h3.sub {
  margin: 2.25rem 0 .9rem;
  padding-bottom: .35rem;
  border-bottom: 1px dashed var(--line);
  color: var(--navy);
}

p { margin: 0 0 1.1rem; }
.note { color: var(--muted); font-size: .9rem; }

.insight {
  background: color-mix(in srgb, var(--navy) 10%, transparent);
  border-left: 4px solid var(--navy);
  padding: .9rem 1.15rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.lead-out {
  border-left: 4px solid var(--gold);
  padding-left: 1rem;
  font-size: 1.03rem;
}

/* ── 獎項比例 ─────────────────────────── */

.tiers { display: grid; gap: .6rem; margin: 1.5rem 0; }

.tier {
  display: flex; align-items: center; gap: 1rem;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: .8rem 1.1rem;
}
.tier .pct { margin: 0; font-weight: 800; font-size: 1.05rem; min-width: 5.5rem; }
.tier .nm  { margin: 0; font-size: 1rem; }

.tier.d { border-color: var(--diamond); }
.tier.d .pct { color: var(--diamond); }
.tier.g { border-color: var(--gold); }
.tier.g .pct { color: var(--gold); }

/* ── 事實列表 ─────────────────────────── */

.facts { list-style: none; padding: 0; margin: 0 0 1rem; }
.facts li {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: .8rem;
  padding: .8rem 0;
  border-bottom: 1px dashed var(--line);
}
.facts li:last-child { border-bottom: 0; }
.facts .k { font-weight: 700; color: var(--navy); }

/* ── 步驟 ─────────────────────────────── */

.steps { list-style: none; counter-reset: s; padding: 0; margin: 0 0 1.5rem; }
.steps > li {
  counter-increment: s;
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1.5rem;
}
.steps > li::before {
  content: counter(s);
  position: absolute; left: 0; top: .05em;
  width: 2rem; height: 2rem;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--navy); color: #fff;
  font-size: .9rem; font-weight: 700;
}
.steps > li p:last-child { margin-bottom: 0; }

/* ── 框 ───────────────────────────────── */

.box, .warn {
  border-radius: var(--radius);
  padding: 1.2rem 1.35rem .5rem;
  margin: 1.6rem 0;
}
.box { background: var(--surface); border: 2px solid var(--line); }
.box p:first-child strong { color: var(--navy); }
.box.grow { border-color: color-mix(in srgb, var(--gold) 55%, transparent); background: color-mix(in srgb, var(--gold) 8%, var(--surface)); }
.box.grow p:first-child strong { color: var(--gold); }

.warn {
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
  border-left: 4px solid var(--danger);
}
.warn h3 { color: var(--danger); }

/* ── 卡片 ─────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
}
.card {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem .8rem;
}
.card h3 { color: var(--navy); margin-bottom: .2rem; }
.card .tip {
  font-size: .84rem; color: var(--muted);
  padding-bottom: .5rem; margin-bottom: .6rem;
  border-bottom: 1px dashed var(--line);
}
.card p:last-child { margin-bottom: .4rem; }

/* ── 詞彙 ─────────────────────────────── */

.quiz-btn {
  padding: .6rem 1.2rem;
  border: 2px solid var(--navy);
  border-radius: 99px;
  background: var(--surface);
  color: var(--navy);
  font-family: inherit; font-size: .92rem; font-weight: 700;
  cursor: pointer;
  margin-bottom: 1.25rem;
}
.quiz-btn:hover { background: var(--navy); color: #fff; }

.vgroup { margin-bottom: 1.5rem; }

.vocab table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: .95rem;
}
.vocab th, .vocab td {
  padding: .6rem .9rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.vocab th {
  width: 42%;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-weight: 600;
  color: var(--navy);
}
.vocab tr:last-child th, .vocab tr:last-child td { border-bottom: 0; }

.vocab.masked td {
  color: transparent;
  background: color-mix(in srgb, var(--muted) 18%, transparent);
  border-radius: 4px;
  cursor: pointer;
}
.vocab.masked td:hover { color: var(--text); background: transparent; }

/* ── 練習題 ───────────────────────────── */

.pwrap {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem .9rem;
  margin-bottom: 1rem;
}

.phead { display: flex; align-items: center; gap: .6rem; margin-bottom: .6rem; }
.pnum {
  width: 1.8rem; height: 1.8rem;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--navy); color: #fff;
  font-size: .85rem; font-weight: 700;
}
.pdom {
  font-size: .78rem; font-weight: 700;
  color: var(--navy);
  background: color-mix(in srgb, var(--navy) 12%, transparent);
  padding: .1rem .6rem; border-radius: 99px;
}

.pq {
  margin: 0 0 .4rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.75;
}
.pzh { margin: 0 0 .8rem; color: var(--muted); font-size: .9rem; }

.prob summary {
  display: inline-block;
  padding: .3rem .9rem;
  border: 1px solid var(--navy-lt);
  border-radius: 99px;
  color: var(--navy);
  font-size: .85rem;
  cursor: pointer;
  list-style: none;
}
.prob summary::-webkit-details-marker { display: none; }
.prob[open] summary { background: var(--navy); color: #fff; border-color: var(--navy); }

.pans { margin-top: .8rem; padding-top: .8rem; border-top: 1px dashed var(--line); }
.pa { margin: 0 0 .5rem; font-size: 1.02rem; }
.pa strong { color: var(--gold); font-size: 1.1rem; }
.ps { margin: 0; font-size: .93rem; line-height: 1.85; color: var(--muted); }
.ps strong { color: var(--text); }

/* ── 時程 ─────────────────────────────── */

.timeline { display: grid; gap: .7rem; }

.tl {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: .3rem 1rem;
  background: var(--surface);
  border: 2px solid var(--line);
  border-left: 5px solid var(--navy-lt);
  border-radius: var(--radius);
  padding: .9rem 1.1rem;
}
.tl.hl { border-left-color: var(--gold); background: color-mix(in srgb, var(--gold) 7%, var(--surface)); }

.tl .when { grid-row: 1 / 3; margin: 0; font-weight: 800; color: var(--navy); font-size: .95rem; }
.tl .what { margin: 0; }
.tl .how  { margin: 0; font-size: .92rem; color: var(--muted); line-height: 1.8; }

/* ── 連結清單 ─────────────────────────── */

.links { list-style: none; padding: 0; margin: 0 0 1rem; }
.links li { padding: .9rem 0; border-bottom: 1px solid var(--line); }
.links li:last-child { border-bottom: 0; }
.links > li > a { font-weight: 700; font-size: 1.02rem; }
.links p { margin: .3rem 0 0; color: var(--muted); font-size: .93rem; }

.badge {
  display: inline-block;
  margin-left: .5rem;
  padding: .05rem .55rem;
  border-radius: 99px;
  background: color-mix(in srgb, var(--navy) 13%, transparent);
  color: var(--navy);
  font-size: .74rem;
  font-weight: 700;
  vertical-align: .1em;
}
.badge.fast {
  background: color-mix(in srgb, var(--gold) 20%, transparent);
  color: var(--gold);
}

.sub-links {
  list-style: none;
  margin: .5rem 0 0;
  padding: 0 0 0 1rem;
  border-left: 2px solid var(--line);
}
.sub-links li {
  padding: .3rem 0;
  border: 0;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.75;
}
.sub-links a { font-weight: 600; }

/* ── 引言 ─────────────────────────────── */

blockquote.pull {
  margin: 0 0 1.5rem;
  padding: 1.3rem 1.5rem;
  background: color-mix(in srgb, var(--gold) 9%, var(--surface));
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.05rem;
  line-height: 1.9;
}
blockquote.pull cite {
  display: block;
  margin-top: .7rem;
  font-size: .85rem;
  font-style: normal;
  color: var(--muted);
}

.reasons { list-style: none; padding: 0; margin: 0 0 1.25rem; }
.reasons li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: .9rem;
}
.reasons li::before {
  content: ""; position: absolute; left: .2rem; top: .82em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--danger);
}

/* ── 頁尾 ─────────────────────────────── */

footer {
  border-top: 1px solid var(--line);
  padding: 2.25rem 0;
  color: var(--muted);
  font-size: .87rem;
  line-height: 1.85;
  text-align: center;
}
footer p { margin: 0 0 .5rem; }
footer .small { font-size: .8rem; opacity: .8; }

a { color: var(--navy); }

/* ── 手機 ─────────────────────────────── */

@media (max-width: 34rem) {
  body { font-size: 16px; }
  .hero { padding: 3rem 0 2.5rem; }
  section { padding-top: 2.75rem; }
  .streak { grid-template-columns: 1fr; }
  .facts li { grid-template-columns: 1fr; gap: .2rem; }
  .tl { grid-template-columns: 1fr; }
  .tl .when { grid-row: auto; }
  .vocab th { width: 50%; }
}