/* ═══════════════════════════════════════════
   CalcWise 精算師 — Shared CSS
   ═══════════════════════════════════════════ */

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

/* ── Design tokens: dark (default) ── */
:root{
  --bg:#0d1117;
  --surface:#161b27;
  --surface2:#1c2236;
  --surface3:#222840;
  --border:#ffffff0d;
  --border2:#ffffff18;
  --border3:#ffffff26;
  --text:#eef0f8;
  --text2:#9aa3be;
  --text3:#55607a;
  --primary:#4f8ef7;
  --primary-g:#4f8ef722;
  --primary-d:#2563eb;
  --green:#22d46e;
  --green-g:#22d46e1e;
  --red:#f05252;
  --red-g:#f052521e;
  --gold:#f5a623;
  --gold-g:#f5a6231e;
  --purple:#a78bfa;
  --purple-g:#a78bfa1a;
  --sw:240px;
  --r:14px;
  --rs:9px;
}

/* ── Light mode ── */
html[data-theme="light"]{
  --bg:#f0f4fb;
  --surface:#ffffff;
  --surface2:#e8edf8;
  --surface3:#dce3f2;
  --border:#1a2a5512;
  --border2:#1a2a551c;
  --border3:#1a2a5528;
  --text:#1a2240;
  --text2:#4a5580;
  --text3:#8892b0;
  --primary:#2563eb;
  --primary-g:#2563eb1a;
  --primary-d:#1d4ed8;
  --green:#15803d;
  --green-g:#15803d18;
  --red:#dc2626;
  --red-g:#dc262618;
  --gold:#b45309;
  --gold-g:#b4530918;
  --purple:#6d28d9;
  --purple-g:#6d28d918;
}

/* ── Font scale ── */
html[data-fs="1"]{font-size:12px}
html[data-fs="2"]{font-size:13px}
html[data-fs="3"]{font-size:14px}
html[data-fs="4"]{font-size:16px}
html[data-fs="5"]{font-size:18px}
html[data-fs="6"]{font-size:20px}
html[data-fs="7"]{font-size:22px}
html{font-size:16px;transition:font-size .2s;}

/* ── Base ── */
body{
  font-family:'Noto Sans TC','Outfit',sans-serif;
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  display:flex;
  overflow-x:hidden;
  font-size:1rem;
  line-height:1.6;
  transition:background .25s,color .25s;
}
body::before{
  content:'';
  position:fixed;inset:0;
  background:
    radial-gradient(ellipse 55% 45% at 12% 8%,#4f8ef710 0%,transparent 55%),
    radial-gradient(ellipse 35% 35% at 88% 85%,#a78bfa08 0%,transparent 55%);
  pointer-events:none;z-index:0;
}
html[data-theme="light"] body::before{
  background:
    radial-gradient(ellipse 55% 45% at 12% 8%,#2563eb08 0%,transparent 55%),
    radial-gradient(ellipse 35% 35% at 88% 85%,#6d28d906 0%,transparent 55%);
}

/* ── Sidebar ── */
.sidebar{
  width:var(--sw);
  min-height:100vh;
  background:var(--surface);
  border-right:1px solid var(--border2);
  display:flex;flex-direction:column;
  position:fixed;left:0;top:0;bottom:0;
  z-index:100;
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;
}
.logo{
  padding:22px 20px 16px;
  border-bottom:1px solid var(--border2);
  flex-shrink:0;
  text-decoration:none;
  display:block;
}
.logo-mark{
  font-family:'Outfit',sans-serif;
  font-size:1.25rem;font-weight:900;
  color:var(--text);
  letter-spacing:-.02em;
  display:flex;align-items:center;gap:9px;
  margin-bottom:3px;
}
.logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px var(--primary);
  flex-shrink:0;
}
.logo-sub{
  font-size:.68rem;color:var(--text3);
  letter-spacing:.14em;text-transform:uppercase;
  font-family:'Outfit',sans-serif;
}
.nav{padding:14px 10px;flex:1;}
.nav-sec{
  font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text3);padding:10px 10px 5px;
  margin-top:6px;font-family:'Outfit',sans-serif;
}
.nav-item{
  display:flex;align-items:center;gap:9px;
  padding:10px 12px;border-radius:var(--rs);
  cursor:pointer;margin-bottom:2px;
  transition:all .15s;
  font-size:.88rem;font-weight:500;
  color:var(--text2);
  border:1px solid transparent;
  text-decoration:none;
  font-family:'Noto Sans TC','Outfit',sans-serif;
}
.nav-item:hover{background:var(--surface2);color:var(--text);}
.nav-item.active{
  background:var(--primary-g);
  border-color:#4f8ef72a;
  color:var(--primary);
}
.nav-item .ni{font-size:.95rem;width:20px;text-align:center;flex-shrink:0;}
.nav-badge{
  margin-left:auto;font-size:.55rem;
  background:var(--surface2);color:var(--text3);
  padding:2px 6px;border-radius:20px;
  letter-spacing:.04em;white-space:nowrap;
  font-family:'Outfit',sans-serif;
}
.nav-item.soon{opacity:.4;pointer-events:none;}

.ad-sidebar{
  margin:10px;border-radius:var(--rs);
  background:var(--surface2);border:1px dashed var(--border2);
  padding:14px;text-align:center;
  font-size:.65rem;color:var(--text3);
  min-height:110px;display:flex;align-items:center;
  justify-content:center;flex-direction:column;gap:4px;
  font-family:'Outfit',sans-serif;
}
.sidebar-footer{
  padding:12px 16px;
  border-top:1px solid var(--border2);
  font-size:.65rem;color:var(--text3);
  font-family:'Outfit',sans-serif;line-height:1.8;
  flex-shrink:0;
}

/* ── Main ── */
.main{
  margin-left:var(--sw);
  flex:1;display:flex;flex-direction:column;
  min-height:100vh;position:relative;z-index:1;
}
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 32px;
  border-bottom:1px solid var(--border2);
  background:var(--bg)cc;
  backdrop-filter:blur(14px);
  position:sticky;top:0;z-index:50;gap:12px;
}
html[data-theme="light"] .topbar{background:#f0f4fbcc;}
.topbar-left{min-width:0;flex:1;}
.topbar-title{
  font-family:'Outfit',sans-serif;
  font-size:1.15rem;font-weight:800;
  color:var(--text);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.topbar-desc{font-size:.78rem;color:var(--text3);margin-top:3px;}
.topbar-right{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.toggle-group{
  display:flex;gap:3px;
  background:var(--surface);
  border:1px solid var(--border2);
  border-radius:20px;padding:3px;
}
.tgl-btn{
  font-size:.7rem;font-family:'Outfit',sans-serif;
  padding:4px 11px;border-radius:16px;
  cursor:pointer;color:var(--text3);
  border:none;background:transparent;
  transition:all .15s;letter-spacing:.04em;
}
.tgl-btn.active{background:var(--primary);color:#fff;}
.theme-btn{
  display:flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;
  background:var(--surface);
  border:1px solid var(--border2);
  cursor:pointer;font-size:.95rem;
  transition:all .2s;flex-shrink:0;
}
.theme-btn:hover{background:var(--surface2);transform:rotate(20deg);}

/* ── Content ── */
.content{
  padding:28px 32px;
  max-width:860px;width:100%;
  animation:fadeIn .4s ease both;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}

/* ── Cards ── */
.card{
  background:var(--surface);
  border:1px solid var(--border2);
  border-radius:var(--r);
  padding:26px;margin-bottom:16px;
}
.card-title{
  font-family:'Outfit',sans-serif;
  font-size:.7rem;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--text3);margin-bottom:18px;
  display:flex;align-items:center;gap:8px;
}
.card-title::before{
  content:'';width:3px;height:14px;
  background:var(--primary);border-radius:2px;
  display:inline-block;flex-shrink:0;
}

/* ── Input rows ── */
.input-row{display:grid;gap:14px;margin-bottom:16px;}
.input-row.c2{grid-template-columns:1fr 1fr;}
.input-row.c3{grid-template-columns:1fr 1fr 1fr;}
.field{display:flex;flex-direction:column;gap:6px;}
label{
  font-size:.78rem;font-weight:600;
  color:var(--text2);letter-spacing:.04em;
  font-family:'Outfit',sans-serif;
}
.iw{
  display:flex;align-items:stretch;
  background:var(--bg);
  border:1.5px solid var(--border2);
  border-radius:var(--rs);
  transition:border-color .15s,box-shadow .15s;
  overflow:hidden;
}
.iw:focus-within{
  border-color:#4f8ef760;
  box-shadow:0 0 0 3px var(--primary-g);
}
html[data-theme="light"] .iw{background:#f8faff;}
.iw input,.iw select{
  flex:1;background:transparent;border:none;outline:none;
  padding:12px 14px;
  font-size:1rem;
  color:var(--text);
  font-family:'Outfit','Noto Sans TC',sans-serif;
  min-width:0;
  -moz-appearance:textfield;
}
.iw input::-webkit-inner-spin-button,
.iw input::-webkit-outer-spin-button{-webkit-appearance:none;}
.iw select{cursor:pointer;appearance:none;color-scheme:dark;}
html[data-theme="light"] .iw select{color-scheme:light;}
select,select option{background-color:var(--surface2);color:var(--text);}
select option:checked{background-color:var(--surface3);}
.ub{
  display:flex;align-items:center;padding:0 13px;
  font-size:.75rem;font-family:'Outfit',sans-serif;
  color:var(--text3);background:var(--surface2);
  border-left:1.5px solid var(--border2);
  white-space:nowrap;flex-shrink:0;
}
.currency-sel{
  background:var(--surface2);border:none;
  border-left:1.5px solid var(--border2);
  outline:none;color:var(--text2);
  font-size:.78rem;font-family:'Outfit',sans-serif;
  padding:0 10px;cursor:pointer;
  min-width:58px;appearance:none;color-scheme:dark;
}
html[data-theme="light"] .currency-sel{color-scheme:light;}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--rs);
  font-family:'Outfit',sans-serif;
  font-size:.95rem;font-weight:700;
  cursor:pointer;border:none;
  transition:all .18s;letter-spacing:.02em;
}
.btn-primary{
  background:var(--primary);color:#fff;
  box-shadow:0 4px 18px var(--primary-g);
}
.btn-primary:hover{background:var(--primary-d);box-shadow:0 4px 26px #4f8ef745;}
.btn-primary:active{transform:scale(.97);}
.btn-block{width:100%;}
.btn-ghost{
  background:transparent;
  border:1.5px solid var(--border3);
  color:var(--text2);
}
.btn-ghost:hover{background:var(--surface2);color:var(--text);}

/* ── Result box ── */
.result-box{
  background:var(--surface2);
  border:1px solid var(--border2);
  border-radius:var(--r);
  padding:24px;display:none;
  animation:popIn .35s cubic-bezier(.34,1.56,.64,1) both;
  margin-top:16px;
}
.result-box.show{display:block;}
@keyframes popIn{from{opacity:0;transform:scale(.93)}to{opacity:1;transform:scale(1)}}
.result-num{
  font-family:'Outfit',sans-serif;
  font-size:2.8rem;font-weight:900;
  letter-spacing:-.03em;line-height:1;color:var(--text);
}
.result-num .runit{
  font-size:.95rem;font-weight:400;
  color:var(--text3);margin-left:6px;
}
.result-meta{
  margin-top:12px;display:flex;gap:18px;
  flex-wrap:wrap;font-size:.78rem;color:var(--text3);
  font-family:'Outfit',sans-serif;
  border-top:1px solid var(--border2);padding-top:12px;
}
.result-meta b{color:var(--text2);}

/* ── Stat cards (compound/roi) ── */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px;}
.stat-card{
  background:var(--surface);border:1px solid var(--border2);
  border-radius:var(--rs);padding:16px 14px;text-align:center;
}
.stat-label{
  font-size:.65rem;font-family:'Outfit',sans-serif;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--text3);margin-bottom:6px;
}
.stat-val{
  font-family:'Outfit',sans-serif;
  font-size:1.4rem;font-weight:800;
  color:var(--text);line-height:1.1;
}
.stat-val.green{color:var(--green);}
.stat-val.gold{color:var(--gold);}
.stat-val.purple{color:var(--purple);}
.stat-val.red{color:var(--red);}

/* ── Compare ── */
.cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.cmp-card{
  background:var(--bg);border:2px solid var(--border2);
  border-radius:var(--r);padding:18px;transition:all .3s;
}
.cmp-card.winner{
  border-color:var(--green);
  box-shadow:0 0 0 1px #22d46e22,0 4px 20px var(--green-g);
}
.cmp-card.loser{opacity:.5;border-color:var(--border);}
.cmp-label{
  font-size:.68rem;font-family:'Outfit',sans-serif;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--text3);margin-bottom:12px;
  display:flex;align-items:center;justify-content:space-between;
}
.win-badge{
  background:var(--green);color:#0d1117;
  font-size:.6rem;padding:3px 8px;
  border-radius:20px;font-weight:700;
}
.cmp-price{
  font-family:'Outfit',sans-serif;font-size:2rem;font-weight:900;
  color:var(--text);margin-top:6px;line-height:1.1;
}
.cmp-price .sm{font-size:.8rem;font-weight:400;color:var(--text3);}
.cmp-diff{margin-top:8px;font-size:.75rem;font-family:'Outfit',sans-serif;}

/* ── Price change ── */
.chg-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--rs);
  font-family:'Outfit',sans-serif;font-size:1rem;font-weight:700;
  margin-bottom:14px;
}
.chg-badge.up{background:var(--red-g);color:var(--red);border:1px solid #f0525230;}
.chg-badge.down{background:var(--green-g);color:var(--green);border:1px solid #22d46e30;}
.chg-badge.flat{background:var(--gold-g);color:var(--gold);border:1px solid #f5a62330;}
.chg-detail{font-size:.85rem;color:var(--text3);font-family:'Outfit',sans-serif;line-height:2.2;}
.chg-detail .val{color:var(--text);}

/* ── Chart ── */
.chart-wrap{
  background:var(--bg);border:1px solid var(--border2);
  border-radius:var(--r);padding:18px;
  position:relative;
}
html[data-theme="light"] .chart-wrap{background:var(--surface2);}
.chart-title{
  font-size:.68rem;font-family:'Outfit',sans-serif;font-weight:700;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--text3);margin-bottom:16px;
}

/* ── Info / explanation ── */
.info-section{
  background:var(--surface);
  border:1px solid var(--border2);
  border-radius:var(--r);
  padding:26px;margin-top:16px;
}
.info-section h3{
  font-family:'Outfit',sans-serif;
  font-size:1.05rem;font-weight:700;
  color:var(--text);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
  border-bottom:1px solid var(--border2);
  padding-bottom:12px;
}
.info-section h4{
  font-family:'Outfit',sans-serif;
  font-size:.9rem;font-weight:700;
  color:var(--text);margin:18px 0 8px;
}
.info-section p{
  font-size:.9rem;color:var(--text2);
  line-height:1.9;margin-bottom:12px;
}
.info-section p:last-child{margin-bottom:0;}
.info-section strong{color:var(--text);}
.info-section ul,.info-section ol{
  padding-left:22px;margin-bottom:14px;
}
.info-section li{
  font-size:.9rem;color:var(--text2);
  line-height:1.9;margin-bottom:4px;
}
.info-section li strong{color:var(--text);}
.formula-box{
  background:var(--surface2);
  border:1px solid var(--border3);
  border-left:3px solid var(--primary);
  border-radius:var(--rs);
  padding:13px 16px;
  font-family:'Outfit',monospace;
  font-size:.88rem;color:var(--primary);
  margin:12px 0;letter-spacing:.02em;
}
.faq-item{
  border-bottom:1px solid var(--border2);
  padding:14px 0;
}
.faq-item:last-child{border-bottom:none;padding-bottom:0;}
.faq-q{
  font-size:.9rem;font-weight:700;
  color:var(--text);margin-bottom:6px;
  font-family:'Outfit',sans-serif;
  display:flex;align-items:flex-start;gap:8px;
}
.faq-q::before{content:'Q';color:var(--primary);flex-shrink:0;font-size:.85rem;}
.faq-a{
  font-size:.87rem;color:var(--text2);
  line-height:1.85;padding-left:20px;
}

/* ── Disclaimer / Terms ── */
.disclaimer-box{
  background:var(--gold-g);
  border:1px solid #f5a62330;
  border-radius:var(--rs);
  padding:14px 16px;
  font-size:.82rem;color:var(--text2);
  line-height:1.8;margin-top:16px;
  display:flex;align-items:flex-start;gap:10px;
}
.disclaimer-box::before{content:'⚠️';flex-shrink:0;font-size:1rem;}

/* ── AdSense banner ── */
.ad-banner{
  margin-top:18px;border-radius:var(--r);
  background:var(--surface);border:1px dashed var(--border2);
  padding:18px;text-align:center;
  font-size:.68rem;color:var(--text3);
  min-height:72px;display:flex;
  align-items:center;justify-content:center;
  gap:6px;font-family:'Outfit',sans-serif;
}

/* ── Error ── */
.err{
  font-size:.78rem;color:var(--red);
  font-family:'Outfit',sans-serif;
  margin-bottom:12px;display:none;
  padding:10px 14px;
  background:var(--red-g);
  border-radius:var(--rs);
  border:1px solid #f0525228;
}
.err.show{display:block;}

/* ── Prose pages (about/privacy/terms) ── */
.prose{max-width:720px;}
.prose h2{
  font-family:'Outfit',sans-serif;
  font-size:1.15rem;font-weight:800;
  color:var(--text);margin:26px 0 10px;
  display:flex;align-items:center;gap:9px;
  border-bottom:1px solid var(--border2);
  padding-bottom:10px;
}
.prose h2:first-child{margin-top:0;}
.prose p{font-size:.9rem;color:var(--text2);line-height:1.9;margin-bottom:12px;}
.prose ul,.prose ol{padding-left:22px;margin-bottom:12px;}
.prose li{font-size:.9rem;color:var(--text2);line-height:1.9;margin-bottom:5px;}
.prose a{color:var(--primary);text-decoration:none;}
.prose a:hover{text-decoration:underline;}
.prose strong{color:var(--text);}

/* ── Index hero ── */
.hero{
  padding:40px 0 28px;
  border-bottom:1px solid var(--border2);
  margin-bottom:28px;
}
.hero-title{
  font-family:'Outfit',sans-serif;
  font-size:2.2rem;font-weight:900;
  letter-spacing:-.03em;line-height:1.15;
  color:var(--text);margin-bottom:10px;
}
.hero-title span{color:var(--primary);}
.hero-sub{
  font-size:1rem;color:var(--text2);
  max-width:560px;line-height:1.7;
}
.tool-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;margin-bottom:28px;
}
.tool-card{
  background:var(--surface);
  border:1px solid var(--border2);
  border-radius:var(--r);
  padding:22px 18px;
  text-decoration:none;
  transition:all .2s;
  display:block;
  position:relative;overflow:hidden;
}
.tool-card::before{
  content:'';position:absolute;inset:0;
  background:var(--primary-g);
  opacity:0;transition:opacity .2s;
}
.tool-card:hover::before{opacity:1;}
.tool-card:hover{
  border-color:#4f8ef740;
  transform:translateY(-2px);
  box-shadow:0 8px 24px #4f8ef715;
}
.tool-card.soon{opacity:.5;pointer-events:none;}
.tc-icon{font-size:1.7rem;margin-bottom:10px;}
.tc-name{
  font-family:'Outfit',sans-serif;
  font-size:1rem;font-weight:700;
  color:var(--text);margin-bottom:5px;
}
.tc-desc{font-size:.8rem;color:var(--text3);line-height:1.5;}
.tc-badge{
  display:inline-block;margin-top:8px;
  font-size:.6rem;font-family:'Outfit',sans-serif;
  background:var(--primary-g);color:var(--primary);
  padding:2px 8px;border-radius:20px;letter-spacing:.05em;
}
.tc-badge.soon{background:var(--surface2);color:var(--text3);}

/* ── Hamburger ── */
.hamburger{
  display:none;position:fixed;top:14px;left:14px;z-index:200;
  background:var(--surface);border:1px solid var(--border2);
  border-radius:var(--rs);padding:8px 11px;
  cursor:pointer;font-size:1rem;
  box-shadow:0 4px 14px #00000060;
}
.overlay{
  display:none;position:fixed;inset:0;
  background:#00000065;z-index:99;
}

/* ── Unit converter ── */
.unit-conv-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end;margin-bottom:16px;}
.swap-btn{
  background:var(--surface2);border:1px solid var(--border2);
  border-radius:50%;width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:1.1rem;transition:all .2s;
  flex-shrink:0;margin-bottom:0;align-self:end;
}
.swap-btn:hover{background:var(--primary-g);transform:rotate(180deg);}

/* ── Area converter ── */
.area-result-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;}
.area-res-card{
  background:var(--surface);border:1px solid var(--border2);
  border-radius:var(--rs);padding:14px;
  display:flex;flex-direction:column;gap:3px;
}
.area-res-label{
  font-size:.68rem;font-family:'Outfit',sans-serif;
  color:var(--text3);letter-spacing:.06em;text-transform:uppercase;
}
.area-res-val{
  font-family:'Outfit',sans-serif;font-size:1.25rem;
  font-weight:800;color:var(--text);
}
.area-res-val.highlight{color:var(--primary);}

/* ── Responsive ── */
@media(max-width:860px){
  .sidebar{transform:translateX(-100%);}
  .sidebar.open{transform:translateX(0);}
  .hamburger{display:flex;align-items:center;}
  .overlay.show{display:block;}
  .main{margin-left:0;}
  .content{padding:18px 16px;}
  .topbar{padding:14px 18px;}
  .input-row.c2,.input-row.c3{grid-template-columns:1fr 1fr;}
  .cmp-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .tool-grid{grid-template-columns:1fr 1fr;}
  .area-result-grid{grid-template-columns:1fr 1fr;}
  .topbar-desc{display:none;}
}
@media(max-width:500px){
  .input-row.c2,.input-row.c3{grid-template-columns:1fr;}
  .tool-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .unit-conv-grid{grid-template-columns:1fr;grid-template-rows:auto auto auto;}
  .swap-btn{width:100%;border-radius:var(--rs);}
}