/* ===== BMW IX1 充電分析 — 科技主題（亮/暗雙色）===== */
:root{
  --bg:#eef2fb; --bg2:#e3e9f7; --panel:rgba(255,255,255,0.72); --panel-solid:#ffffff;
  --surface:rgba(255,255,255,0.60); --surface2:rgba(255,255,255,0.80);
  --hero-grad:linear-gradient(135deg,rgba(255,255,255,.86),rgba(238,243,255,.7));
  --body-grad:linear-gradient(180deg,#f4f7fe,#e7edfa);
  --grid-line:rgba(70,100,190,.05);
  --stroke:rgba(70,100,190,0.16); --stroke2:rgba(70,100,190,0.30);
  --txt:#1b2547; --muted:#5f6b91; --dim:#9aa3c2;
  --cyan:#08b6c4; --blue:#2f6bff; --purple:#7b4fff; --pink:#ff3d8b; --green:#16b34a; --amber:#e0890a;
  --grad:linear-gradient(120deg,#08b6c4,#2f6bff,#7b4fff);
  --grad2:linear-gradient(120deg,#2f6bff,#7b4fff,#ff3d8b);
  --shadow:0 10px 34px rgba(40,60,120,.10);
  --mono:'JetBrains Mono','SF Mono',ui-monospace,Consolas,monospace;
}
/* ===== 暗色主題 ===== */
[data-theme="dark"]{
  --bg:#0a0f1f; --bg2:#0d1326; --panel:rgba(22,30,55,0.66); --panel-solid:#141b33;
  --surface:rgba(130,160,235,0.05); --surface2:rgba(130,160,235,0.09);
  --hero-grad:linear-gradient(135deg,rgba(28,38,68,.85),rgba(16,22,44,.75));
  --body-grad:linear-gradient(180deg,#0a0f1f,#0c1226);
  --grid-line:rgba(120,150,230,.05);
  --stroke:rgba(120,150,230,0.16); --stroke2:rgba(120,150,230,0.30);
  --txt:#e7ecfb; --muted:#9aa6cc; --dim:#697498;
  --shadow:0 12px 38px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,'Noto Sans TC',Segoe UI,Roboto,sans-serif;
  color:var(--txt); background:var(--bg);
  background-image:
    radial-gradient(1000px 560px at 88% -12%, rgba(47,107,255,.12), transparent 60%),
    radial-gradient(820px 520px at -5% -5%, rgba(123,79,255,.12), transparent 55%),
    var(--body-grad);
  background-attachment:fixed; min-height:100vh;
  transition:background-color .3s ease, color .3s ease;
}
/* 細格線科技背景 */
body::before{content:'';position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.6;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:48px 48px;}
.wrap{position:relative;z-index:1;max-width:1240px;margin:0 auto;padding:24px 18px 80px}

/* ===== Hero ===== */
.hero{position:relative;border:1px solid var(--stroke);border-radius:22px;overflow:hidden;
  background:var(--hero-grad);box-shadow:var(--shadow);padding:30px 28px}
.hero h1{margin:0;font-size:30px;letter-spacing:.5px;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{color:var(--muted);margin-top:6px;font-size:14px;font-family:var(--mono)}
.hero .cars{display:flex;gap:18px;align-items:center;margin-top:18px;flex-wrap:wrap}
.car-badge{display:flex;align-items:center;gap:10px;border:1px solid var(--stroke);border-radius:14px;padding:8px 14px;background:var(--surface)}
.car-badge.active{border-color:var(--cyan);box-shadow:0 0 22px rgba(8,182,196,.18)}
.car-badge .name{font-family:var(--mono);font-weight:700;font-size:13px}
.car-badge .tag{font-size:11px;color:var(--muted)}
.car-svg{width:88px;height:34px}

/* ===== Upload ===== */
.drop{margin-top:18px;border:1.5px dashed var(--stroke2);border-radius:16px;padding:22px;text-align:center;
  background:var(--surface);transition:.2s;cursor:pointer}
.drop.over{border-color:var(--cyan);background:rgba(8,182,196,.08);box-shadow:0 0 30px rgba(8,182,196,.15) inset}
.drop b{color:var(--blue)}
.drop .hint{color:var(--muted);font-size:13px;margin-top:6px}
.btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.btn{font-family:var(--mono);font-size:13px;border:1px solid var(--stroke2);background:var(--surface2);color:var(--txt);
  padding:9px 16px;border-radius:10px;cursor:pointer;transition:.15s}
.btn:hover{border-color:var(--cyan);box-shadow:0 0 16px rgba(8,182,196,.18)}
.btn.primary{background:var(--grad);color:#fff;border:0;font-weight:700}
.btn.share{background:linear-gradient(135deg,#10b981,#2f6bff);color:#fff;border:0;font-weight:700}
.btn.share:hover{box-shadow:0 0 18px rgba(16,185,129,.28)}
.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.btn.danger:hover{border-color:var(--pink);box-shadow:0 0 16px rgba(255,61,139,.22)}
.status{margin-top:10px;font-family:var(--mono);font-size:12.5px;color:var(--muted);min-height:18px}

/* ===== Nav ===== */
.navbar{position:sticky;top:10px;z-index:20;display:flex;flex-wrap:wrap;gap:6px;margin-top:16px;padding:8px 10px;
  border:1px solid var(--stroke);border-radius:14px;background:var(--surface2);backdrop-filter:blur(12px);box-shadow:var(--shadow)}
.navbar a{font-family:var(--mono);font-size:12.5px;color:var(--muted);text-decoration:none;padding:6px 12px;border-radius:9px;transition:.15s}
.navbar a:hover{color:var(--blue);background:rgba(47,107,255,.08)}

/* ===== Opt-in 社群共享 ===== */
.optin{display:flex;gap:10px;align-items:flex-start;max-width:760px;margin:14px auto 0;
  padding:12px 16px;border:1px solid var(--stroke2);border-radius:14px;
  background:var(--surface);font-size:12.5px;line-height:1.7;color:var(--txt);
  cursor:pointer;text-align:left;transition:border-color .2s,background .2s}
.optin:hover{border-color:var(--blue);background:rgba(47,107,255,.06)}
.optin input{margin-top:3px;width:18px;height:18px;accent-color:var(--blue);flex:0 0 auto;cursor:pointer}
.optin.on{border-color:var(--blue);background:rgba(47,107,255,.10)}

.community-preview{max-width:760px;margin:14px auto 0;padding:14px 16px;border:1px solid var(--stroke);
  border-radius:16px;background:var(--surface);box-shadow:var(--shadow)}
.community-preview .preview-head{font-weight:800;margin-bottom:10px}
.community-preview .preview-grid{grid-template-columns:repeat(2,1fr);margin-bottom:8px}
.community-preview .kpi{padding:14px}

/* ===== Section ===== */
.section{margin-top:30px}
.section h2{font-size:18px;margin:0 0 14px;display:flex;align-items:center;gap:10px;letter-spacing:.4px}
.section h2 .bar{width:4px;height:18px;border-radius:3px;background:var(--grad)}
.note{color:var(--muted);font-size:12px;font-family:var(--mono)}

/* ===== 可折疊區塊 ===== */
.collapse-head{cursor:pointer;user-select:none}
.collapse-head:hover .collapse-toggle{background:rgba(47,107,255,.16);color:var(--txt)}
.collapse-head:focus-visible{outline:2px solid var(--blue);outline-offset:4px;border-radius:8px}
.collapse-toggle{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  color:var(--blue);background:rgba(47,107,255,.10);border:1px solid var(--stroke2);
  padding:4px 12px;border-radius:999px;transition:background .2s,color .2s}
.collapse-toggle .ct-ico{display:inline-block;transition:transform .3s ease}
.collapse-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease;opacity:.4}
.collapse-body>.collapse-inner{overflow:hidden;min-height:0}
.collapsible:not(.collapsed) .collapse-body{grid-template-rows:1fr;opacity:1}
.collapsible:not(.collapsed) .collapse-toggle .ct-ico{transform:rotate(90deg)}

/* toggle 月/季 */
.toggle{display:inline-flex;border:1px solid var(--stroke2);border-radius:10px;overflow:hidden;background:var(--surface)}
.toggle .tg{font-family:var(--mono);font-size:13px;border:0;background:transparent;color:var(--muted);padding:6px 16px;cursor:pointer}
.toggle .tg.active{background:var(--grad);color:#fff;font-weight:700}

/* ===== Cards / grid ===== */
.grid{display:grid;gap:16px}
.kpis{grid-template-columns:repeat(4,1fr)}
.cols-2{grid-template-columns:1fr 1fr}
.cols-3{grid-template-columns:repeat(3,1fr)}
.card{position:relative;border:1px solid var(--stroke);border-radius:16px;padding:18px;
  background:var(--panel);backdrop-filter:blur(8px);box-shadow:var(--shadow);overflow:hidden}
.card::after{content:'';position:absolute;left:0;top:0;height:3px;width:100%;background:var(--grad);opacity:.85}
.card{transition:transform .18s ease, box-shadow .18s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(40,60,120,.16)}

/* ===== Theory cards ===== */
.theory-card p{color:var(--muted);font-size:13.5px;line-height:1.65;margin:8px 0 12px}
.theory-card .th-h{display:flex;align-items:center;gap:10px;font-size:15px}
.theory-card .th-ic{font-size:22px}
.theory-card .formula{font-family:var(--mono);font-size:12.5px;color:var(--blue);background:rgba(47,107,255,.07);
  border:1px solid rgba(47,107,255,.18);border-radius:9px;padding:8px 11px;margin-bottom:8px}
.theory-card .cite{font-size:11px;color:var(--dim);font-style:italic}
.kpi .label{color:var(--muted);font-size:12px;font-family:var(--mono)}
.kpi .val{font-size:27px;font-weight:800;margin-top:6px;font-family:var(--mono);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.kpi .unit{font-size:13px;color:var(--muted);margin-left:4px;-webkit-text-fill-color:var(--muted)}
.chart-box{height:320px;position:relative}
.chart-box.sm{height:260px}
.import-report{margin-top:16px}
.report-head{display:flex;align-items:center;gap:10px;justify-content:space-between;flex-wrap:wrap;margin-bottom:12px}
.report-title{font-weight:800}
.report-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.report-mini{border:1px solid var(--stroke);border-radius:12px;padding:10px 12px;background:var(--surface)}
.report-mini .label{font-family:var(--mono);font-size:11px;color:var(--muted)}
.report-mini .val{font-family:var(--mono);font-size:20px;font-weight:800;margin-top:4px;color:var(--blue)}
.report-warnings{margin-top:10px;line-height:1.7}
.qbadge{display:inline-flex;align-items:center;gap:4px;border-radius:999px;padding:2px 8px;font-family:var(--mono);font-size:11px;font-weight:700;border:1px solid var(--stroke2);white-space:nowrap}
.qbadge.high{color:var(--green);background:rgba(22,179,74,.10);border-color:rgba(22,179,74,.30)}
.qbadge.medium{color:var(--blue);background:rgba(47,107,255,.10);border-color:rgba(47,107,255,.28)}
.qbadge.low{color:var(--amber);background:rgba(224,137,10,.10);border-color:rgba(224,137,10,.30)}
.qbadge.none{color:var(--muted);background:rgba(95,107,145,.08)}

/* ===== Health gauge ===== */
.gauge-wrap{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.gauge{position:relative;width:180px;height:180px;flex:0 0 auto}
.gauge .num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge .num b{font-size:42px;font-family:var(--mono);background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.gauge .num span{font-size:12px;color:var(--muted)}
.grade{font-size:54px;font-weight:900;font-family:var(--mono)}
.grade.A{color:var(--green)} .grade.B{color:var(--blue)} .grade.C{color:var(--amber)} .grade.D{color:var(--pink)}
.persona{flex:1;min-width:220px}
.persona .tag{display:inline-block;font-family:var(--mono);font-weight:700;font-size:15px;padding:6px 14px;border-radius:999px;border:1px solid var(--cyan);color:var(--cyan);background:rgba(8,182,196,.08)}
.persona p{color:var(--muted);margin:10px 0 0;line-height:1.6;font-size:14px}

/* ===== connector icons / type cards ===== */
.type-cards{display:flex;gap:14px;flex-wrap:wrap;margin-top:6px}
.type-card{flex:1;min-width:150px;border:1px solid var(--stroke);border-radius:14px;padding:14px;background:var(--surface);text-align:center}
.type-card.dc{border-color:rgba(255,61,139,.4)} .type-card.ac{border-color:rgba(8,182,196,.4)}
.type-card svg{width:54px;height:54px;margin-bottom:6px}
.type-card .t{font-family:var(--mono);font-size:13px;font-weight:700}
.type-card .n{font-size:26px;font-weight:800;font-family:var(--mono)}
.type-card.dc .n{color:var(--pink)} .type-card.ac .n{color:var(--cyan)} .type-card.ultra .n{color:var(--purple)}
.type-card .meta{font-size:11px;color:var(--muted);margin-top:3px}

/* ===== advice ===== */
.advice{display:grid;gap:12px}
.advice .item{display:flex;gap:14px;border:1px solid var(--stroke);border-radius:14px;padding:14px 16px;background:var(--surface)}
.advice .item .ic{font-size:22px;flex:0 0 auto}
.advice .item .t{font-weight:700;margin-bottom:4px}
.advice .item p{margin:0;color:var(--muted);line-height:1.6;font-size:13.5px}
.advice .item.good{border-left:3px solid var(--green)}
.advice .item.warn{border-left:3px solid var(--pink)}
.advice .item.tip{border-left:3px solid var(--blue)}

/* ===== FAQ ===== */
.faq-grid{align-items:stretch}
.faq-card h3{margin:0 0 8px;font-size:15px}
.faq-card p{margin:0;color:var(--muted);line-height:1.7;font-size:13.5px}

/* ===== heatmap ===== */
.heat{display:grid;grid-template-columns:auto repeat(24,1fr);gap:2px;font-family:var(--mono);font-size:9px}
.heat .lbl{color:var(--muted);font-size:10px;display:flex;align-items:center;justify-content:flex-end;padding-right:6px}
.heat .hr{color:var(--dim);text-align:center;font-size:8px}
.heat .cell{aspect-ratio:1;border-radius:3px;background:rgba(70,100,190,.08)}

/* ===== savings ===== */
.save-grid{grid-template-columns:repeat(4,1fr)}
.save .val{font-size:24px}

/* ===== table ===== */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--stroke)}
th{color:var(--muted);font-weight:600;font-family:var(--mono);font-size:12px}
td.num{font-family:var(--mono);text-align:right}
tbody tr:hover{background:rgba(47,107,255,.05)}
.pill{font-size:11px;padding:2px 8px;border-radius:999px;font-family:var(--mono)}
.pill.pub{background:rgba(8,182,196,.14);color:var(--cyan)}
.pill.pri{background:rgba(123,79,255,.14);color:var(--purple)}

#map{height:420px;border-radius:14px;overflow:hidden;border:1px solid var(--stroke)}
.leaflet-popup-content{font-family:-apple-system,'Noto Sans TC',sans-serif;font-size:12.5px}

/* ===== 右上角控制列（主題 / 語言）===== */
.controls{position:fixed;top:14px;right:14px;z-index:50;display:flex;gap:8px}
.ctrl-btn{font-family:var(--mono);font-size:13px;display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--stroke2);background:var(--surface2);color:var(--txt);backdrop-filter:blur(10px);
  padding:8px 12px;border-radius:999px;cursor:pointer;transition:.15s;box-shadow:var(--shadow);line-height:1}
.ctrl-btn:hover{border-color:var(--cyan);box-shadow:0 0 16px rgba(8,182,196,.22)}
.ctrl-btn .ci{font-size:15px}
@media(max-width:560px){.controls{top:8px;right:8px;gap:6px}.ctrl-btn{padding:7px 10px;font-size:12px}}

.hidden{display:none!important}
.center{text-align:center}
.footer{margin-top:40px;text-align:center;color:var(--dim);font-size:12px;font-family:var(--mono);line-height:1.8}

/* fade-in */
.section,.hero{animation:fade .5s ease both}
@keyframes fade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* 熱力圖在窄螢幕可橫向捲動 */
.heat-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* RWD */
@media(max-width:900px){
  .kpis{grid-template-columns:repeat(2,1fr)} .cols-2,.cols-3{grid-template-columns:1fr}
  .save-grid{grid-template-columns:repeat(2,1fr)}
  .report-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:23px}
  .heat{min-width:540px}
}
@media(max-width:560px){
  .wrap{padding:18px 12px 64px}
  .hero{padding:22px 16px;border-radius:18px}
  .hero h1{font-size:20px}
  .hero .sub{font-size:12.5px}
  .kpis{grid-template-columns:repeat(2,1fr);gap:10px}
  .save-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .report-grid{grid-template-columns:repeat(2,1fr)}
  .kpi .val{font-size:21px}
  .card{padding:14px;border-radius:14px}
  .section{margin-top:24px}
  .section h2{font-size:16px}
  /* 導覽列改橫向捲動，省垂直空間 */
  .navbar{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;top:6px}
  .navbar a{white-space:nowrap;padding:6px 10px}
  /* 量表縮小並置中堆疊 */
  .gauge-wrap{gap:14px;justify-content:center}
  .gauge{width:150px;height:150px}
  .gauge .num b{font-size:34px}
  .persona{min-width:100%}
  /* 按鈕與表格 */
  .btns{gap:8px}
  .btn{padding:8px 12px;font-size:12px}
  table{font-size:12px}
  th,td{padding:7px 7px}
  .type-cards{gap:10px}
  .type-card{min-width:120px;padding:11px}
  #map{height:300px}
  .chart-box,.chart-box.sm{height:240px}
  .footer{font-size:11px}
}