/* ============================================================
   程式設計基礎・自主學習地圖（teaching-scaffolds/basic/）
   建立在 ../style.css 之上，只補充這個系列需要的元件。
   ============================================================ */

:root{
  --unit:var(--brand);
  --lv1:#2c9a6b; --lv1-bg:#e7f7f0;
  --lv2:#3f4fc0; --lv2-bg:#eef0ff;
  --lv3:#b7791f; --lv3-bg:#fbf1de;
}

/* ---------- hero（依單元換色） ---------- */
.hero.unit-hero{background:linear-gradient(155deg,var(--unit) 0%,color-mix(in srgb,var(--unit) 72%,#1b1f3b) 100%);}
.hero .hero-lead{font-size:16px;opacity:.95;margin:6px 0 0;max-width:720px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:18px;}

/* ---------- 平台切換 ---------- */
.platform-switch{
  display:inline-flex;align-items:center;gap:4px;
  background:rgba(255,255,255,.16);border-radius:999px;padding:4px;
  font-size:14px;
}
.platform-switch .label{padding:0 8px 0 10px;opacity:.9;}
.platform-switch button{
  border:0;background:transparent;color:#fff;font:inherit;font-weight:700;
  padding:5px 14px;border-radius:999px;cursor:pointer;
}
.platform-switch button[aria-pressed="true"]{background:#fff;color:var(--unit);}

/* ---------- 如何使用 ---------- */
.howto{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:8px 0 10px;}
.howto .step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow);font-size:15px;}
.howto .step b{display:block;font-size:16px;margin-bottom:4px;}
.howto .step .n{display:inline-flex;width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;align-items:center;justify-content:center;font-size:14px;font-weight:800;margin-right:6px;}

/* ---------- 課程地圖 ---------- */
.roadmap{display:flex;flex-direction:column;align-items:stretch;gap:0;margin-top:10px;}
.roadmap .stage{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.roadmap .stage > .unit-card{flex:1 1 300px;max-width:520px;}
.roadmap .connector{text-align:center;color:var(--sub);font-size:22px;line-height:1;padding:8px 0;}
.roadmap .stage-note{text-align:center;font-size:13.5px;color:var(--sub);margin:-2px 0 6px;}
.unit-card{
  --unit:var(--brand);
  display:block;text-decoration:none;color:var(--ink);
  background:var(--card);border:1px solid var(--line);border-left:8px solid var(--unit);
  border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);
  transition:transform .15s,box-shadow .15s;
}
.unit-card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(40,45,70,.12);}
.unit-card .unit-top{display:flex;align-items:center;gap:10px;}
.unit-card .unit-icon{font-size:26px;line-height:1;}
.unit-card .unit-id{font-size:13px;font-weight:800;color:var(--unit);letter-spacing:.5px;}
.unit-card h3{margin:0;font-size:19px;font-weight:900;}
.unit-card p{margin:6px 0 10px;color:var(--sub);font-size:15px;}
.unit-card .kp-mini{display:flex;flex-wrap:wrap;gap:6px;}
.unit-card .kp-mini span{font-size:12.5px;background:color-mix(in srgb,var(--unit) 10%,#fff);color:color-mix(in srgb,var(--unit) 80%,#000);border-radius:999px;padding:2px 10px;font-weight:600;}
.side-branch{margin-top:26px;padding:16px;border:2px dashed var(--line);border-radius:var(--radius);}
.side-branch .side-head{font-size:14px;color:var(--sub);margin-bottom:10px;}

/* ---------- 單元頁：知識點路徑 ---------- */
.kp-path{list-style:none;margin:10px 0;padding:0;position:relative;}
.kp-path::before{content:"";position:absolute;left:23px;top:24px;bottom:24px;width:3px;background:color-mix(in srgb,var(--unit) 25%,#fff);}
.kp-node{position:relative;display:flex;gap:16px;margin-bottom:18px;}
.kp-node .kp-dot{
  flex:none;z-index:1;width:48px;height:48px;border-radius:50%;
  background:var(--unit);color:#fff;font-weight:900;font-size:15px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 5px var(--bg);
}
.kp-node .kp-body{flex:1;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);}
.kp-node h3{margin:0 0 4px;font-size:18px;font-weight:800;}
.kp-node h3 a{color:var(--ink);text-decoration:none;}
.kp-node h3 a:hover{color:var(--unit);}
.kp-node .kp-goal{margin:0 0 10px;color:var(--sub);font-size:15px;}
.kp-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13.5px;}
.pill{display:inline-flex;align-items:center;gap:4px;border-radius:999px;padding:3px 11px;font-weight:700;font-size:13px;background:#f1f2f7;color:var(--sub);}
.pill.core{background:var(--lv1-bg);color:var(--lv1);}
.pill.ext{background:var(--lv3-bg);color:var(--lv3);}
.pill.wip{background:#f3effe;color:#7c4ddb;}

/* ---------- 按鈕與課程代碼 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:6px;border:0;cursor:pointer;
  font:inherit;font-size:14.5px;font-weight:700;text-decoration:none;
  padding:8px 16px;border-radius:10px;background:var(--unit);color:#fff;
}
.btn:hover{filter:brightness(1.08);}
.btn.ghost{background:transparent;color:var(--unit);border:1.5px solid color-mix(in srgb,var(--unit) 45%,#fff);}
.btn.light{background:#fff;color:var(--unit);}
.code-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-family:"JetBrains Mono","Cascadia Code",Consolas,monospace;font-size:13.5px;
  background:#f1f2f7;border-radius:8px;padding:3px 4px 3px 10px;color:var(--ink);
}
.hero .code-chip{background:rgba(255,255,255,.18);color:#fff;}
.code-chip button{border:0;background:#fff;color:var(--sub);border-radius:6px;padding:2px 8px;font-size:12px;cursor:pointer;font-family:inherit;}
.code-chip button.done{color:var(--lv1);}

/* ---------- 知識點頁 ---------- */
ul.goals{list-style:none;padding:0;margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;box-shadow:var(--shadow);}
ul.goals li{padding-left:30px;position:relative;margin:6px 0;}
ul.goals li::before{content:"🎯";position:absolute;left:0;}
.md p{margin:12px 0;}
main.md > h3,.demo > h3{font-size:18px;font-weight:800;margin:26px 0 8px;color:color-mix(in srgb,var(--unit) 80%,#000);}
.md table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow);font-size:14.5px;margin:12px 0;}
.md th{background:var(--unit);color:#fff;text-align:left;padding:10px 14px;font-size:14px;}
.md td{padding:9px 14px;border-bottom:1px solid var(--line);}
.md tr:nth-child(even) td{background:#fafbfe;}
.table-scroll{overflow-x:auto;}
.note{background:#f3f4fa;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;margin:14px 0 0;font-size:15px;}
.note .tag,.tip .tag{display:flex;align-items:center;gap:6px;font-weight:800;margin-bottom:6px;font-size:14px;}
.tip .tag{color:var(--tip);}
.note .tag{color:var(--sub);}
.pitfall ul,.tip ul,.note ul{margin:4px 0 0;padding-left:20px;}

/* 示範題、練習題卡片 */
.demo{background:var(--card);border:1px solid var(--line);border-top:5px solid var(--unit);border-radius:var(--radius);padding:22px 24px;margin:0 0 28px;box-shadow:var(--shadow);}
.demo > .demo-label{display:inline-block;font-size:13px;font-weight:800;color:#fff;background:var(--unit);border-radius:999px;padding:3px 12px;margin-bottom:10px;}
.problem-card{background:#fbfbfe;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;margin:6px 0 10px;}
.problem-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin-bottom:6px;}
.problem-head h3,.problem-head h4{margin:0;font-size:18px;font-weight:800;}
.problem-head .pid{font-family:Consolas,monospace;font-size:13px;color:var(--sub);}
.lv{font-size:12.5px;font-weight:800;border-radius:999px;padding:2px 10px;}
.lv.L1{background:var(--lv1-bg);color:var(--lv1);}
.lv.L2{background:var(--lv2-bg);color:var(--lv2);}
.lv.L3{background:var(--lv3-bg);color:var(--lv3);}
.problem-desc{margin:4px 0 8px;}
.io{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:14.5px;margin:8px 0;}
.io dt{font-weight:800;color:var(--sub);}
.io dd{margin:0;white-space:pre-line;}
.samples{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:10px 0;}
.sample{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;font-size:14px;}
.sample .sample-row{display:grid;grid-template-columns:52px 1fr;border-bottom:1px solid var(--line);}
.sample .sample-row:last-child{border-bottom:0;}
.sample .k{background:#f1f2f7;color:var(--sub);font-weight:700;padding:6px 8px;font-size:13px;}
.sample pre{margin:0;padding:6px 10px;font-family:Consolas,monospace;white-space:pre-wrap;word-break:break-all;}
.sample .empty{color:var(--sub);font-style:italic;}
.card-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px;}
details.hint{margin-top:10px;background:var(--tip-bg);border:1px solid var(--tip-line);border-radius:8px;padding:8px 14px;font-size:15px;}
details.hint summary{cursor:pointer;font-weight:800;color:var(--tip);}
details.hint[open] summary{margin-bottom:4px;}
.practice-list{display:flex;flex-direction:column;gap:16px;}
.practice{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);}
.practice .focus{margin:6px 0 0;font-size:15.5px;}
.practice .focus b{color:color-mix(in srgb,var(--unit) 80%,#000);}
details.problem-more{margin-top:8px;font-size:14.5px;}
details.problem-more summary{cursor:pointer;color:var(--sub);font-weight:700;}
details.extension{background:var(--card);border:1px dashed var(--lv3);border-radius:var(--radius);padding:14px 20px;margin-bottom:14px;}
details.extension > summary{cursor:pointer;font-weight:800;font-size:17px;}
details.extension > summary .lv{margin-left:6px;vertical-align:middle;}
.checklist{list-style:none;padding:0;margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 22px;box-shadow:var(--shadow);}
.checklist li{padding:8px 0 8px 32px;position:relative;border-bottom:1px dashed var(--line);}
.checklist li:last-child{border-bottom:0;}
.checklist li::before{content:"☐";position:absolute;left:4px;top:6px;font-size:18px;color:var(--unit);}
.wip-box{background:#f3effe;border:1px solid #d9ccfb;border-radius:var(--radius);padding:18px 22px;color:#5b3fb0;}
.summary-box{background:var(--card);border:1px solid var(--line);border-left:6px solid var(--unit);border-radius:var(--radius);padding:16px 22px;box-shadow:var(--shadow);}
.summary-box ul{margin:0;padding-left:20px;}
.summary-box li{margin:6px 0;}
.before-box{font-size:15px;color:var(--sub);margin:12px 0 0;}
.before-box b{color:var(--ink);}

/* ---------- 上一個／下一個 ---------- */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:48px;}
.pager a{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 16px;box-shadow:var(--shadow);}
.pager a:hover{border-color:var(--unit);}
.pager .dir{font-size:12.5px;color:var(--sub);}
.pager .next{text-align:right;grid-column:2;}
.pager b{font-size:15.5px;}

.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#242832;color:#fff;padding:8px 16px;border-radius:999px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;}
.toast.show{opacity:.92;}

@media (max-width:600px){
  .kp-path::before{left:19px;}
  .kp-node .kp-dot{width:40px;height:40px;font-size:13px;}
  .demo{padding:18px 16px;}
  .io{grid-template-columns:1fr;}
}

@media print{
  .hero{background:none !important;color:var(--ink);border-bottom:2px solid var(--unit);border-radius:0;}
  .hero .breadcrumb a,.hero .code-chip{color:var(--ink);}
  .platform-switch,.card-actions,.btn,.code-chip button,.pager,.toast{display:none !important;}
  details{border:0;}
  details > summary{list-style:none;}
  .demo,.practice,.kp-node .kp-body{box-shadow:none;break-inside:avoid;}
  body{background:#fff;font-size:12pt;}
}

/* 章節標題跟著單元顏色 */
h2.section-title{border-left-color:var(--unit);}
h2.section-title .num{background:var(--unit);}
p.lead strong,.goals strong,.checklist strong{color:color-mix(in srgb,var(--unit) 80%,#000);}

/* ---------- 可摺疊版本（2026-09-26） ---------- */
.fold-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px;margin:-8px 0 -20px;font-size:13.5px;color:var(--sub);}
.fold-bar span{margin-right:auto;}
.fold-bar .btn{padding:5px 12px;font-size:13.5px;}
details.fold > summary{list-style:none;cursor:pointer;}
details.fold > summary::-webkit-details-marker,details.step > summary::-webkit-details-marker{display:none;}
details.fold > summary h2.section-title{margin:28px 0 12px;}
details.fold > summary h2.section-title::after{
  content:"▾";margin-left:auto;font-size:18px;color:var(--unit);
  transition:transform .2s;transform:rotate(-90deg);
}
details.fold[open] > summary h2.section-title::after{transform:rotate(0);}
details.fold:not([open]) > summary h2.section-title{opacity:.88;}
details.fold > summary:hover h2.section-title{opacity:1;}
details.step{border:1px solid var(--line);border-radius:var(--radius-sm);margin:10px 0;background:#fff;}
details.step > summary{
  list-style:none;cursor:pointer;padding:11px 16px;font-weight:800;font-size:16px;
  color:color-mix(in srgb,var(--unit) 80%,#000);display:flex;align-items:center;gap:8px;
}
details.step > summary::before{content:"▸";transition:transform .2s;color:var(--unit);}
details.step[open] > summary::before{transform:rotate(90deg);}
details.step[open] > summary{border-bottom:1px dashed var(--line);}
details.step .step-body{padding:4px 18px 14px;}
@media print{
  .fold-bar{display:none;}
  details.fold > summary h2.section-title::after,details.step > summary::before{display:none;}
}

/* ---------- 首頁：進階挑戰（114 學年縣市題目組） ---------- */
.adv-modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:10px 0 14px;}
.adv-mode{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--lv1);border-radius:var(--radius-sm);padding:10px 14px;font-size:14.5px;}
.adv-mode.contest{border-left-color:#d9534f;}
.adv-mode b{display:block;font-size:15.5px;margin-bottom:2px;}
table.adv-table td,table.adv-table th{text-align:center;vertical-align:middle;white-space:nowrap;}
table.adv-table tbody th{text-align:left;font-weight:800;background:#fafbfe;color:var(--ink);}
.adv-btn{padding:4px 12px;font-size:13.5px;background:var(--lv1);}
.adv-btn.contest{background:#d9534f;}
.adv-none{color:var(--sub);}
.adv-foot{font-size:13.5px;color:var(--sub);}
@media print{.adv-btn{display:inline !important;background:none;color:var(--ink);padding:0;}}

/* ---------- 首頁頁首的頁內書籤 ---------- */
.hero-bookmarks{display:inline-flex;flex-wrap:wrap;gap:6px;align-items:center;}
.hero-bookmarks a{color:#fff;text-decoration:none;font-size:13.5px;font-weight:700;background:rgba(255,255,255,.16);border-radius:999px;padding:5px 12px;}
.hero-bookmarks a:hover{background:rgba(255,255,255,.3);}
.hero-bookmarks a.adv{background:rgba(255,255,255,.92);color:var(--unit);}
.unit-card,.anchor{scroll-margin-top:16px;}

/* ---------- 頁尾版權宣告 ---------- */
.copyright{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-size:12.5px;line-height:1.75;color:var(--sub);}
.copyright p{margin:4px 0;}
.copyright a{color:var(--sub);}
@media print{.hero-bookmarks{display:none !important;}}

/* ---------- 版本標籤（校外師生版） ---------- */
.edition-tag{float:right;font-size:13px;font-weight:800;background:#fff;color:var(--unit);border-radius:999px;padding:4px 12px;margin-left:10px;}
@media print{.edition-tag{float:none;display:inline-block;border:1px solid var(--unit);}}