/* 練功房 —— 沿用 TWBK 小鎮的像素風（深藍夜色＋米白告示牌）。介面用俐方體 11 號（OFL），題目內文用一般黑體，久讀不累。 */
@font-face { font-family: "Cubic11"; src: url("fonts/Cubic_11.woff2") format("woff2"); font-display: swap; }
:root {
  --navy: #1b2a4a; --navy2: #24375f; --edge: #0e1628; --paper: #fbf3df; --paper2: #efe2c2; --ink: #2b2a33; --dim: #7a6f5a;
  --ok: #2f9e4f; --ok-bg: #dff3e0; --bad: #d23f34; --bad-bg: #fbe1dc; --warn: #e6a92a; --accent: #3a6fc4; --gold: #e6b84a;
  --px: 3px; --pixel: "Cubic11", "Noto Sans TC", monospace;
  --read: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Heiti TC", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; color: var(--ink); background: var(--navy);
  background-image: radial-gradient(#2a3b66 1px, transparent 1px); background-size: 14px 14px;
  font: 15px/1.5 var(--pixel); -webkit-font-smoothing: none; overflow-x: hidden; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
[hidden] { display: none !important; }

/* ---------- 頂部與導覽 ---------- */
.top { position: sticky; top: 0; z-index: 20; background: var(--navy); border-bottom: 3px solid var(--edge);
  padding: calc(8px + env(safe-area-inset-top)) 14px 8px; }
.top .in { max-width: 980px; margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.top h1 { margin: 0; font-size: 20px; font-weight: normal; color: #fff; text-shadow: 2px 2px 0 var(--edge); display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.top h1 a { text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo { width: 30px; height: 30px; display: grid; place-items: center; background: var(--accent); color: #fff; font-size: 18px;
  border: 3px solid var(--edge); box-shadow: inset 2px 2px 0 #ffffff55, inset -2px -2px 0 #00000040; }
.nav { display: flex; gap: 4px; margin-left: 12px; }
.nav a { color: #b9c6e6; text-decoration: none; padding: 4px 10px; border: 2px solid transparent; white-space: nowrap; }
.nav a.on { color: #fff; border-color: #4a5f92; background: var(--navy2); }
.top .who { margin-left: auto; color: #b9c6e6; font-size: 13px; white-space: nowrap; text-decoration: none; }
@media (max-width: 720px) {
  .nav { position: fixed; z-index: 30; left: 0; right: 0; bottom: 0; margin: 0; background: var(--navy); border-top: 3px solid var(--edge);
    padding: 4px 4px calc(4px + env(safe-area-inset-bottom)); justify-content: space-around; }
  .nav a { flex: 1; text-align: center; padding: 6px 2px; font-size: 13px; }
  body.quizzing .nav { display: none; }
  main { padding-bottom: calc(70px + env(safe-area-inset-bottom)) !important; }
}
main { max-width: 980px; margin: 0 auto; padding: 14px 12px 40px; display: grid; gap: 14px; }

/* ---------- 卡片、標題 ---------- */
.card { background: var(--paper); border: var(--px) solid var(--edge); padding: 14px;
  box-shadow: inset 0 0 0 var(--px) var(--paper2), 0 4px 0 var(--edge); min-width: 0; }
.card h2 { margin: 0 0 10px; font-size: 17px; font-weight: normal; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.card h2 .sub, .sub { color: var(--dim); font-size: 12px; }
.card h2 .sub { margin-left: auto; }
.card h3 { margin: 14px 0 8px; font-size: 15px; font-weight: normal; }
.section-title { margin: 6px 2px 0; color: var(--paper); font-size: 15px; font-weight: normal; display: flex; align-items: center; gap: 8px;
  text-shadow: 2px 2px 0 var(--edge); }
.section-title::after { content: ""; flex: 1; height: 2px; background: #3a4d7a; }
.grid2 { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .grid2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.muted { color: var(--dim); font-size: 13px; }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.spacer { flex: 1; }
.empty { color: var(--dim); text-align: center; padding: 18px 0; font-size: 14px; }

/* ---------- 按鈕 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; cursor: pointer; text-decoration: none;
  padding: 7px 14px; background: #fff9ea; color: var(--ink); border: 3px solid var(--edge); box-shadow: 0 3px 0 var(--edge);
  transition: transform .06s; white-space: nowrap; }
.btn:hover { background: #fff3cf; }
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--edge); }
.btn:disabled { opacity: .5; cursor: default; transform: none; }
.btn.go { background: #3fae55; color: #fff; box-shadow: inset 2px 2px 0 #6fd384, 0 3px 0 var(--edge); }
.btn.go:hover { background: #48bb5f; }
.btn.blue { background: var(--accent); color: #fff; box-shadow: inset 2px 2px 0 #6f9be0, 0 3px 0 var(--edge); }
.btn.red { background: var(--bad); color: #fff; box-shadow: inset 2px 2px 0 #f07a70, 0 3px 0 var(--edge); }
.btn.small { padding: 3px 9px; font-size: 13px; border-width: 2px; box-shadow: 0 2px 0 var(--edge); }
.btn.big { padding: 12px 18px; font-size: 18px; width: 100%; white-space: normal; line-height: 1.35; }
.btn.ghost { background: transparent; box-shadow: none; border-color: transparent; text-decoration: underline; padding: 4px 6px; }
.btn.ghost:active { transform: none; }

/* ---------- 首頁 ---------- */
.hero { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr); }
.hero .greet { font-size: 18px; }
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.kpi { background: #fff9ea; border: 2px solid var(--edge); padding: 6px 8px; text-align: center; text-decoration: none; }
.kpi b { display: block; font-size: 22px; font-weight: normal; line-height: 1.2; }
.kpi span { font-size: 12px; color: var(--dim); }
a.kpi:hover { background: #fff3cf; }
@media (max-width: 420px) { .kpi b { font-size: 18px; } .kpi span { font-size: 11px; } }
.review-cta { display: grid; gap: 4px; }
.list { display: grid; gap: 6px; }
.item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; background: #fff9ea; border: 2px solid var(--edge); text-decoration: none; min-width: 0; }
a.item:hover { background: #fff3cf; }
.item .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item .r { font-size: 13px; color: var(--dim); white-space: nowrap; }
.pill { display: inline-block; font-size: 12px; padding: 0 7px; border: 2px solid var(--edge); background: #fff; white-space: nowrap; }
.pill.ok { background: var(--ok-bg); color: #1d6b34; }
.pill.bad { background: var(--bad-bg); color: #9a2a22; }
.pill.blue { background: #dfe8fb; color: #24467f; }

.exam-head .icon { width: 44px; height: 44px; display: grid; place-items: center; background: var(--c, var(--accent)); color: #fff; font-size: 22px; flex: none;
  border: 3px solid var(--edge); box-shadow: inset 2px 2px 0 #ffffff55, inset -2px -2px 0 #00000040; }
.exam-head { display: flex; align-items: center; gap: 10px; }
.exam-head .name { font-size: 18px; }
.subj { display: grid; gap: 6px; margin-top: 10px; padding-top: 10px; border-top: 2px dashed var(--paper2); }
.bar { height: 12px; background: #e9dcbc; border: 2px solid var(--edge); position: relative; overflow: hidden; }
.bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); }
.bar i.solid { background: var(--ok); }

/* ---------- 表單 ---------- */
label.f { display: block; margin: 10px 0 4px; font-size: 13px; color: var(--dim); }
input[type=text], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: 7px 9px; background: #fff; border: 3px solid var(--edge); font-family: var(--read); font-size: 15px; -webkit-font-smoothing: auto; }
textarea { min-height: 80px; resize: vertical; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { cursor: pointer; user-select: none; padding: 3px 10px; font-size: 13px; background: #fff; border: 2px solid var(--edge); }
.chip.on { background: var(--accent); color: #fff; box-shadow: inset 2px 2px 0 #6f9be0; }
.chip small { opacity: .7; }
.seg { display: inline-flex; border: 2px solid var(--edge); }
.seg button { border: 0; background: #fff; padding: 4px 12px; cursor: pointer; font-size: 14px; }
.seg button + button { border-left: 2px solid var(--edge); }
.seg button.on { background: var(--ink); color: #fff; }
.tabs { display: flex; gap: 0; border-bottom: 3px solid var(--edge); margin: -4px 0 12px; overflow-x: auto; }
.tabs button { background: transparent; border: 0; padding: 6px 14px; cursor: pointer; color: var(--dim); border-bottom: 3px solid transparent; margin-bottom: -3px; white-space: nowrap; }
.tabs button.on { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- 作答畫面 ---------- */
body.quizzing .top { display: none; }
.qbar { position: sticky; top: 0; z-index: 25; background: var(--navy); margin: -14px -12px 0; padding: calc(8px + env(safe-area-inset-top)) 12px 8px;
  border-bottom: 3px solid var(--edge); color: #fff; display: grid; gap: 6px; }
.qbar .row { flex-wrap: nowrap; }
.qbar .title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 15px; }
.qbar .btn { background: var(--navy2); color: #dfe7ff; border-color: #4a5f92; box-shadow: none; }
.timer { font-size: 18px; color: #fff; min-width: 4.5em; text-align: right; }
.timer.low { color: #ff8a80; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: .4; } }
.progress { height: 8px; background: #33467a; border: 2px solid var(--edge); position: relative; }
.progress i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--gold); }

.qcard { padding: 16px; }
.qmeta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 12px; color: var(--dim); margin-bottom: 10px; }
.stem { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 18px; line-height: 1.75; margin: 0 0 14px; white-space: pre-wrap; word-break: break-word; }
.opts { display: grid; gap: 8px; }
.opt { display: flex; gap: 10px; align-items: flex-start; text-align: left; width: 100%; cursor: pointer; padding: 11px 12px;
  background: #fff; border: 3px solid var(--edge); box-shadow: 0 3px 0 var(--edge); font-family: var(--read); -webkit-font-smoothing: auto;
  font-size: 16px; line-height: 1.6; transition: transform .05s; }
.opt:hover:not(:disabled) { background: #fffbe9; }
.opt:active:not(:disabled) { transform: translateY(2px); box-shadow: 0 1px 0 var(--edge); }
.opt .k { flex: none; width: 28px; height: 28px; display: grid; place-items: center; font-family: var(--pixel); -webkit-font-smoothing: none;
  font-size: 15px; background: var(--paper); border: 2px solid var(--edge); }
.opt .v { flex: 1; min-width: 0; word-break: break-word; }
.opt.picked { background: #e3ecfd; }
.opt.picked .k { background: var(--accent); color: #fff; }
.opt.right { background: var(--ok-bg); border-color: #1d6b34; }
.opt.right .k { background: var(--ok); color: #fff; }
.opt.wrong { background: var(--bad-bg); border-color: #9a2a22; }
.opt.wrong .k { background: var(--bad); color: #fff; }
.opt:disabled { cursor: default; }
.feedback { margin-top: 14px; padding: 12px; border: 3px solid var(--edge); background: #fff9ea; display: grid; gap: 8px; }
.feedback.ok { background: var(--ok-bg); }
.feedback.bad { background: var(--bad-bg); }
.feedback .verdict { font-size: 18px; }
.explain { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 15px; line-height: 1.7; white-space: pre-wrap; }
.rate { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-size: 13px; }
.qtools { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.star.on { background: var(--gold); }
.qnav { display: flex; gap: 8px; margin-top: 4px; }
.qnav .btn { flex: 1; }
.kbd { font-size: 11px; color: var(--dim); text-align: center; }
@media (hover: none), (max-width: 720px) { .kbd { display: none; } }

.sheet { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 5px; }
.sheet button { padding: 4px 0; background: #fff; border: 2px solid var(--edge); cursor: pointer; font-size: 13px; }
.sheet button.done { background: #dfe8fb; }
.sheet button.flag { box-shadow: inset 0 -4px 0 var(--gold); }
.sheet button.cur { outline: 3px solid var(--accent); outline-offset: 1px; }
.sheet button.right { background: var(--ok-bg); }
.sheet button.wrong { background: var(--bad-bg); }
.sheet button.skip { background: #eee; color: #999; }

/* ---------- 結果 ---------- */
.score { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.score b { font-size: 46px; font-weight: normal; line-height: 1; }
.verdict-pass { color: var(--ok); } .verdict-fail { color: var(--bad); }
.review-list { display: grid; gap: 8px; }
.rv { padding: 10px; border: 2px solid var(--edge); background: #fff; cursor: pointer; display: grid; gap: 4px; }
.rv .s { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 15px; line-height: 1.6; }
.rv.ok { border-left: 8px solid var(--ok); } .rv.bad { border-left: 8px solid var(--bad); } .rv.skip { border-left: 8px solid #aaa; }

/* ---------- 統計 ---------- */
.heat { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 12px); gap: 3px; overflow-x: auto; padding-bottom: 4px; }
.heat i { width: 12px; height: 12px; background: #e9dcbc; border: 1px solid #d6c7a1; }
.heat i.l1 { background: #b7dcb9; } .heat i.l2 { background: #7cc283; } .heat i.l3 { background: #3f9e4f; } .heat i.l4 { background: #1d6b34; }
.tagrow { display: grid; grid-template-columns: minmax(0, 9em) minmax(0, 1fr) 6.5em; gap: 8px; align-items: center; font-size: 13px; }
.tagrow .bar { height: 14px; }
.tagrow .n { text-align: right; color: var(--dim); white-space: nowrap; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 90px; padding-top: 6px; }
.bars div { flex: 1; display: grid; align-content: end; justify-items: center; gap: 2px; font-size: 11px; color: var(--dim); height: 100%; }
.bars div i { width: 100%; background: var(--accent); border: 2px solid var(--edge); min-height: 2px; }
.bars div b { font-weight: normal; color: var(--ink); }
table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th, table.t td { text-align: left; padding: 6px 6px; border-bottom: 2px solid var(--paper2); vertical-align: top; }
table.t th { font-weight: normal; color: var(--dim); font-size: 12px; }

/* ---------- 題庫 ---------- */
.qitem { padding: 10px 12px; background: #fff; border: 2px solid var(--edge); display: grid; gap: 6px; cursor: pointer; }
.qitem:hover { background: #fffbe9; }
.qitem .s { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 15px; line-height: 1.6; }
.qitem .a { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 14px; color: #1d6b34; }
.pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin-top: 10px; }

/* ---------- 彈窗、提示 ---------- */
.modal { position: fixed; inset: 0; z-index: 50; background: #0e1628cc; display: grid; place-items: center; padding: 16px; }
.modal .card { width: 100%; max-width: 640px; max-height: calc(100vh - 32px); overflow: auto; }
.toast { position: fixed; left: 50%; bottom: calc(84px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 60; background: var(--ink); color: #fff;
  padding: 8px 16px; border: 3px solid var(--edge); max-width: 90vw; font-size: 14px; }
.toast.err { background: var(--bad); }

/* ---------- 登入頁 ---------- */
.login { max-width: 380px; margin: 10vh auto 0; padding: 0 14px; }
.login .brand { background: var(--navy); margin: -14px -14px 12px; padding: 22px 14px 18px; text-align: center; color: #fff; }
.login .brand .logo { width: 56px; height: 56px; font-size: 32px; margin: 0 auto 8px; }
.login .brand h1 { margin: 0; font-size: 24px; font-weight: normal; text-shadow: 2px 2px 0 var(--edge); }
.login button[type=submit] { width: 100%; margin-top: 16px; font-size: 17px; }
.login .msg { margin-top: 10px; min-height: 1.5em; font-size: 13px; }
.login .alt { margin-top: 14px; padding-top: 10px; border-top: 2px dashed var(--paper2); font-size: 13px; color: var(--dim); text-align: center; }

/* ---------- 考試卡片牆 ---------- */
.wall { display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 720px) { .wall { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 980px) { .wall { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.tile { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; min-width: 0; text-align: left; text-decoration: none; cursor: pointer;
  padding: 12px; background: var(--paper); border: 3px solid var(--edge); box-shadow: inset 0 0 0 3px var(--paper2), 0 4px 0 var(--edge);
  border-top: 8px solid var(--c, var(--accent)); color: var(--ink); font: inherit; transition: transform .08s; }
a.tile:hover, button.tile:hover { transform: translateY(-2px); box-shadow: inset 0 0 0 3px #ffe9a8, 0 6px 0 var(--edge); }
a.tile:active, button.tile:active { transform: translateY(2px); box-shadow: inset 0 0 0 3px var(--paper2), 0 2px 0 var(--edge); }
.tile .icon { width: 40px; height: 40px; display: grid; place-items: center; background: var(--c, var(--accent)); color: #fff; font-size: 20px; flex: none;
  border: 3px solid var(--edge); box-shadow: inset 2px 2px 0 #ffffff55, inset -2px -2px 0 #00000040; margin-bottom: 4px; }
.tile .name { font-size: 16px; line-height: 1.35; }
.tile .desc { font-size: 12px; color: var(--dim); line-height: 1.45; flex: 1; }
.tile .bar { width: 100%; height: 10px; margin-top: 4px; }
.tile .row { margin-top: 6px; }
.tile.static { cursor: default; }
.tile.soon { cursor: default; opacity: .62; border-top-color: #9a917c; }
.tile.soon .icon { background: #9a917c; }
@media (max-width: 420px) { .tile { padding: 10px; } .tile .name { font-size: 15px; } }

.banner { display: flex; align-items: center; gap: 14px; text-decoration: none; padding: 12px 14px; color: #fff; background: var(--c, var(--bad));
  border: 3px solid var(--edge); box-shadow: inset 3px 3px 0 #ffffff40, inset -3px -3px 0 #00000030, 0 4px 0 var(--edge); }
.banner:hover { filter: brightness(1.06); }
.banner .count { flex: none; min-width: 64px; text-align: center; font-size: 14px; background: #00000030; border: 2px solid #0e162888; padding: 4px 6px; }
.banner .count b { display: block; font-size: 30px; font-weight: normal; line-height: 1; }
.banner .txt { font-size: 13px; line-height: 1.5; }
.banner .txt b { font-size: 17px; font-weight: normal; }
.special-head { border-top: 8px solid var(--c, var(--bad)); }
.special-head .name { font-size: 19px; }
.countdown { flex: none; min-width: 72px; text-align: center; padding: 6px; color: #fff; background: var(--c, var(--bad)); border: 3px solid var(--edge); font-size: 14px; }
.countdown b { display: block; font-size: 30px; font-weight: normal; line-height: 1; }
button.tile { width: 100%; }

/* ---------- 統整筆記 ---------- */
.guide { font-family: var(--read); -webkit-font-smoothing: auto; font-size: 16px; line-height: 1.8; }
.guide h2 { font-family: var(--pixel); -webkit-font-smoothing: none; font-weight: normal; font-size: 20px; margin: 0 0 10px; }
.guide h3 { font-family: var(--pixel); -webkit-font-smoothing: none; font-weight: normal; font-size: 18px; margin: 26px 0 8px; padding: 6px 10px;
  background: var(--navy); color: #fff; border: 2px solid var(--edge); scroll-margin-top: 70px; }
.guide h4 { font-size: 16px; margin: 16px 0 6px; color: #24467f; }
.guide p { margin: 6px 0; }
.guide ul { margin: 4px 0 8px; padding-left: 1.3em; }
.guide li { margin: 3px 0; }
.guide b { color: #8f2c27; }
.guide .t { font-size: 14px; }
.tscroll { overflow-x: auto; margin: 8px 0; }
.tscroll table.t { min-width: 420px; background: #fff; border: 2px solid var(--edge); }
.tscroll table.t th { background: var(--paper2); color: var(--ink); }
.callout { margin: 8px 0; padding: 8px 12px; background: #eef3fc; border-left: 6px solid var(--accent); font-size: 15px; }
.callout.bad { background: var(--bad-bg); border-left-color: var(--bad); }
.gpractice { margin: 12px 0 4px; }
.gpractice .btn { white-space: normal; text-align: left; font-family: var(--pixel); -webkit-font-smoothing: none; }
.toc summary, .orig summary { cursor: pointer; font-size: 15px; padding: 4px 0; }
.toc ol { margin: 6px 0 0; padding-left: 0; list-style: none; columns: 2; column-gap: 24px; font-size: 14px; }
@media (max-width: 560px) { .toc ol { columns: 1; } }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }
.orig { border-bottom: 2px dashed var(--paper2); padding: 6px 0; }
.orig summary { font-family: var(--pixel); -webkit-font-smoothing: none; }
.origtext { white-space: pre-wrap; word-break: break-word; font-size: 15px; line-height: 1.75; margin-top: 8px; }
.totop { position: fixed; right: 14px; bottom: calc(84px + env(safe-area-inset-bottom)); z-index: 20; width: 44px; height: 44px; padding: 0; }
@media (min-width: 721px) { .totop { bottom: 24px; } }
.score b.grade { font-size: 26px; color: var(--accent); }