/* ===== 設計變數 ===== */
:root{
  --primary:#0F766E;
  --primary-700:#115E59;
  --primary-soft:#E6F4F1;
  --accent:#0369A1;
  --bg:#F4F6F5;
  --surface:#FFFFFF;
  --ink:#16302A;
  --ink-2:#52645F;
  --border:#DCE4E1;
  --danger:#DC2626;
  --ok:#15803D;
  --warn:#B45309;
  --side-bg:#0E211C;
  --side-ink:#D9E7E2;
  --radius:12px;
  --shadow:0 1px 2px rgba(22,48,42,.06),0 4px 14px rgba(22,48,42,.05);
  --font:'Noto Sans TC','Microsoft JhengHei','PingFang TC',sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.65;
}
:focus-visible{outline:3px solid #2DD4BF;outline-offset:2px;border-radius:4px}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ===== 版面 ===== */
.sidebar{
  position:fixed;inset:0 auto 0 0;width:236px;z-index:50;
  background:var(--side-bg);color:var(--side-ink);
  display:flex;flex-direction:column;padding:18px 14px;
  transition:transform .25s ease;
}
#main{margin-left:236px;padding:28px 32px 60px;max-width:1280px}
.brand{display:flex;gap:10px;align-items:center;margin-bottom:20px}
.brand-mark{
  width:42px;height:42px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,#14B8A6,#0F766E);
  color:#fff;font-weight:700;font-size:22px;
  display:flex;align-items:center;justify-content:center;
  font-family:'Noto Serif TC',serif;
}
.brand-name{font-weight:700;font-size:15px;line-height:1.35;color:#fff}
.brand-sub{font-size:11px;opacity:.65;letter-spacing:.06em}
.nav{display:flex;flex-direction:column;gap:2px;flex:1;overflow-y:auto}
.nav-item{
  display:flex;align-items:center;gap:10px;
  background:none;border:0;color:var(--side-ink);cursor:pointer;
  font:inherit;font-size:14.5px;text-align:left;
  padding:10px 12px;border-radius:9px;min-height:44px;
  transition:background .2s,color .2s;
}
.nav-item:hover{background:rgba(255,255,255,.08)}
.nav-item.active{background:var(--primary);color:#fff;font-weight:500}
.nav-item .ic{width:19px;height:19px;flex:0 0 auto}
.ic{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nav-tutorials{
  text-decoration:none;margin-top:6px;
  border:1px solid rgba(20,184,166,.35);
  color:var(--primary-lt,#5EEAD4)!important;
}
.nav-tutorials:hover{background:rgba(20,184,166,.12)!important;border-color:rgba(20,184,166,.6)}
.side-foot{font-size:11.5px;opacity:.55;padding:12px 12px 2px;line-height:1.6}
.nav-toggle{
  display:none;position:fixed;top:12px;left:12px;z-index:60;
  width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
  background:var(--surface);color:var(--ink);cursor:pointer;box-shadow:var(--shadow);
}
.nav-toggle .ic{width:22px;height:22px}
.scrim{position:fixed;inset:0;background:rgba(10,20,17,.5);z-index:45}

.foot{
  margin-top:48px;padding-top:18px;border-top:1px solid var(--border);
  color:var(--ink-2);font-size:12.5px;
}

/* ===== 頁面 ===== */
.page{display:none}
.page.active{display:block;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.page-head{margin-bottom:22px}
.page-head h1{
  margin:0 0 6px;font-size:26px;font-weight:700;letter-spacing:.01em;
  font-family:'Noto Serif TC',var(--font);color:var(--primary-700);
}
.page-head p{margin:0;color:var(--ink-2);max-width:72ch}
h2{font-size:17px;margin:0 0 14px;font-weight:700}
h3{font-size:15.5px;margin:0 0 8px;font-weight:700;color:var(--primary-700)}

/* ===== 卡片與網格 ===== */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);margin-bottom:18px;
}
.card.hl{border-color:#99D6CD;background:linear-gradient(180deg,#F2FBF9,#fff)}
.card.info{background:var(--primary-soft);border-color:#BBDFD8}
.card.info p{margin:0;font-size:14.5px}
.warn-card{background:#FFF8EE;border-color:#F0DCBC}
.warn-card p{margin:0;font-size:14.5px}
.grid{display:grid;gap:16px;margin-bottom:18px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
.grid .card{margin-bottom:0}
.split{display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:18px;align-items:start}
.quick-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;text-align:left;cursor:pointer;font:inherit;color:inherit;
  box-shadow:var(--shadow);transition:transform .2s,border-color .2s;min-height:44px;
}
.quick-card:hover{transform:translateY(-2px);border-color:var(--primary)}
.quick-card h3{margin-bottom:6px}
.quick-card p{margin:0;font-size:13.5px;color:var(--ink-2)}

/* ===== 表單 ===== */
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:12px;font-size:14px}
.field>span:first-child{font-weight:500;color:var(--ink)}
.field input[type=number],.field input[type=text],.field input[type=password],
.field select,textarea{
  font:inherit;color:var(--ink);background:#fff;
  border:1px solid var(--border);border-radius:8px;
  padding:9px 12px;min-height:44px;width:100%;
  transition:border-color .2s;
}
.field input:hover,.field select:hover,textarea:hover{border-color:#B7C6C1}
.field input:focus,.field select:focus,textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(15,118,110,.15)}
.field.check{flex-direction:row;align-items:center;gap:10px;min-height:44px}
.field.check input{width:20px;height:20px;min-height:0;accent-color:var(--primary);cursor:pointer}
.hint{font-size:12px;color:var(--ink-2);font-weight:400}
.row{display:flex;gap:12px;align-items:flex-end}
.row.wrap{flex-wrap:wrap;align-items:center}
.row.space{justify-content:space-between}
.grow{flex:1 1 0;min-width:0}
textarea{resize:vertical;line-height:1.7;font-size:13.5px}
.key-row{display:flex;gap:8px}
.key-row input{flex:1}

/* ===== 按鈕 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  background:var(--primary);color:#fff;border:1px solid var(--primary);
  font:inherit;font-size:14.5px;font-weight:500;
  padding:10px 18px;border-radius:9px;cursor:pointer;min-height:44px;
  transition:background .2s,border-color .2s;
}
.btn:hover{background:var(--primary-700);border-color:var(--primary-700)}
.btn.ghost{background:#fff;color:var(--primary-700);border-color:var(--border)}
.btn.ghost:hover{border-color:var(--primary);background:var(--primary-soft)}
.btn.sm{padding:7px 13px;font-size:13.5px;min-height:38px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.file-btn{position:relative;overflow:hidden}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.chips.col{flex-direction:column;align-items:stretch}
.chip{
  background:var(--primary-soft);color:var(--primary-700);
  border:1px solid #BBDFD8;border-radius:999px;
  font:inherit;font-size:12.5px;padding:5px 12px;cursor:pointer;
  transition:background .2s;min-height:32px;text-align:left;
}
.chip:hover{background:#D2EEE8}
.chip.q{border-radius:10px;padding:9px 12px;font-size:13.5px;min-height:40px}

/* ===== 統計卡 ===== */
.stats{margin-bottom:18px}
.stat{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:2px;
}
.stat-label{font-size:12.5px;color:var(--ink-2)}
.stat b{font-size:22px;font-weight:700;color:var(--primary-700);font-variant-numeric:tabular-nums}
.stat-unit{font-size:12px;color:var(--ink-2)}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--border)}
th{font-weight:500;color:var(--ink-2);font-size:12.5px;white-space:nowrap;background:#FAFCFB}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tbody tr:hover{background:#F7FAF9}
td.empty{text-align:center;color:var(--ink-2);padding:24px}
table.kv td{padding:8px 4px}
table.kv td:first-child{color:var(--ink-2)}
table.kv td.num{font-weight:500}
table input[type=text],table input[type=number]{
  font:inherit;font-size:13.5px;border:1px solid var(--border);border-radius:6px;
  padding:6px 8px;min-height:36px;width:100%;
}
table input.frac{width:64px;text-align:right}
.del-btn{
  background:none;border:0;cursor:pointer;color:var(--ink-2);
  font-size:16px;padding:6px 10px;border-radius:6px;min-height:36px;
}
.del-btn:hover{color:var(--danger);background:#FDF0EF}

/* ===== 徽章/狀態 ===== */
.badge{
  display:inline-block;padding:2px 10px;border-radius:999px;
  font-size:12px;font-weight:500;background:#EEF1F0;color:var(--ink-2);
}
.badge.ok{background:#E5F4EA;color:var(--ok)}
.badge.no{background:#FDECEC;color:var(--danger)}
.badge.warn{background:#FCF1E2;color:var(--warn)}
.verdict{
  margin-top:12px;padding:14px 16px;border-radius:10px;
  background:#EEF1F0;color:var(--ink-2);font-weight:500;font-size:15px;
}
.verdict.ok{background:#E5F4EA;color:var(--ok)}
.verdict.no{background:#FDECEC;color:var(--danger)}
.verdict.warn{background:#FCF1E2;color:var(--warn)}
.warn-line{color:var(--warn);font-size:13.5px;margin:8px 0 0}
.status{font-size:13px;color:var(--ink-2)}
.status.ok{color:var(--ok)}
.status.err{color:var(--danger)}
.fine{font-size:12.5px;color:var(--ink-2);margin:10px 0 0;line-height:1.7}
.oddlot{margin:0 0 14px;padding:12px 14px;border-radius:10px;font-size:13.5px}
.oddlot.ok{background:#E5F4EA;color:var(--ok)}
.oddlot.bad{background:#FCF1E2;color:var(--warn)}

/* ===== 清單 ===== */
.steps{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:8px;font-size:14.5px}
.checklist{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;font-size:14px}
.link-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px;font-size:14px}
.link-list a{color:var(--accent);font-weight:500;text-decoration:none}
.link-list a:hover{text-decoration:underline}
a{color:var(--accent)}
.case-table td{vertical-align:top}
.case-table .badge{margin:0 4px 4px 0}
.case-metrics{margin-top:6px;color:var(--ink-2);font-size:12.5px;line-height:1.55}
.uc-out{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-top:6px;
}
.uc-out .uc-item{
  background:var(--primary-soft);border-radius:9px;padding:10px 12px;text-align:center;
}
.uc-out .uc-item b{display:block;font-size:17px;color:var(--primary-700);font-variant-numeric:tabular-nums}
.uc-out .uc-item span{font-size:12px;color:var(--ink-2)}
.howto{margin-top:12px;font-size:14px}
.howto summary{cursor:pointer;color:var(--accent);font-weight:500;min-height:32px;display:flex;align-items:center}
.howto ol{margin:8px 0 0;padding-left:22px;display:flex;flex-direction:column;gap:6px}
code{background:#EEF1F0;border-radius:5px;padding:1px 6px;font-size:.92em}

/* ===== 圖表/畫布 ===== */
.chart,.plan{width:100%;height:auto;display:block}

/* ===== 地圖 ===== */
.map-box{height:520px;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:#EAEFED;position:relative;z-index:0}
.map-box .map-fallback{display:flex;align-items:center;justify-content:center;height:100%;color:var(--ink-2);font-size:14.5px;padding:20px;text-align:center}
.leaflet-container{font-family:var(--font)!important}
input[type=range]{accent-color:var(--primary);width:150px;min-height:44px;cursor:pointer}
@media (max-width:760px){.map-box{height:380px}}

/* ===== 方案卡 ===== */
.scheme-grid{margin-bottom:18px}
.scheme-card{
  background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);
  padding:14px 16px;cursor:pointer;font:inherit;text-align:left;color:inherit;
  transition:border-color .2s;position:relative;box-shadow:var(--shadow);
}
.scheme-card:hover{border-color:#8FB8B0}
.scheme-card.sel{border-color:var(--primary)}
.scheme-card.dis{opacity:.55;cursor:not-allowed}
.scheme-card h3{font-size:14.5px;margin-bottom:6px}
.scheme-card .big{font-size:24px;font-weight:700;color:var(--primary-700);font-variant-numeric:tabular-nums}
.scheme-card .big small{font-size:13px;font-weight:400;color:var(--ink-2)}
.scheme-card dl{margin:8px 0 0;font-size:12.5px;color:var(--ink-2);display:grid;grid-template-columns:auto auto;gap:2px 10px}
.scheme-card dl b{color:var(--ink);font-variant-numeric:tabular-nums}
.scheme-card .rec{
  position:absolute;top:-10px;right:10px;background:var(--warn);
  color:#fff;font-size:11.5px;padding:2px 10px;border-radius:999px;font-weight:500;
}
.scheme-card .why{font-size:12px;color:var(--danger);margin-top:6px}

/* ===== 聊天 ===== */
.chat-card{display:flex;flex-direction:column;min-height:560px}
.chat-log{
  flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;
  padding:14px;background:#F7FAF9;border:1px solid var(--border);border-radius:10px;
  margin-bottom:12px;max-height:520px;
}
.msg{
  max-width:88%;padding:11px 15px;border-radius:14px;font-size:14.5px;
  white-space:pre-wrap;overflow-wrap:break-word;line-height:1.7;
}
.msg.user{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:#fff;border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.bot.err{background:#FDECEC;border-color:#F3C3C3;color:var(--danger)}
.msg .ctx{display:block;font-size:12px;opacity:.75;margin-bottom:6px}
.chat-input{display:flex;gap:10px;align-items:flex-end}
.chat-input textarea{flex:1;min-height:48px}
.typing{color:var(--ink-2);font-size:13px}

/* ===== Toast ===== */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translate(-50%,16px);
  background:var(--ink);color:#fff;padding:11px 20px;border-radius:10px;
  font-size:14px;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;
  z-index:100;box-shadow:0 8px 24px rgba(0,0,0,.25);max-width:90vw;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ===== RWD ===== */
@media (max-width:1100px){
  .split{grid-template-columns:1fr}
  .cols-4{grid-template-columns:repeat(2,1fr)}
  .cols-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  #main{margin-left:0;padding:68px 16px 40px}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:none;box-shadow:0 0 40px rgba(0,0,0,.4)}
  .nav-toggle{display:flex;align-items:center;justify-content:center}
  .cols-2,.cols-3,.cols-4{grid-template-columns:1fr}
  .row{flex-wrap:wrap}
  .page-head h1{font-size:22px}
  .msg{max-width:96%}
}

/* ===== 列印 ===== */
@media print{
  .sidebar,.nav-toggle,.btn,.chips,.howto,.foot,.toast,.scrim{display:none!important}
  #main{margin:0;padding:0;max-width:none}
  body{background:#fff;font-size:12px}
  .card,.stat,.quick-card{box-shadow:none;border-color:#bbb;break-inside:avoid}
  .split{grid-template-columns:1fr}
  .page.active .page-head h1::after{
    content:"　—　台南不動產開發工作台（粗估參考，不具法律效力）";
    font-size:11px;color:#666;font-weight:400;
  }
}