/* style.css — 044 皮小秋神算盤
 * Two skins on <html data-skin>: "cute" (default, 030 皮皮小學堂 candy look) and "pro".
 * Each skin defines light + dark tokens; components only read tokens.
 * Order: tokens → base → chrome → tabs → form → results → learn → chart → media.
 */

/* ── 1. Tokens ─────────────────────────────────────────────────────── */
:root, :root[data-skin="cute"] {
  --bg: #FFF6EA; --bg2: #FFEBD2; --card: #FFFFFF; --card2: #FFFAF3;
  --ink: #2B2238; --ink2: #574C69; --muted: #8A8199; --line: rgba(43, 34, 56, .10);
  --accent: #8B5CF6; --accent2: #FF7AB6; --gold: #F7C948; --warn: #E8503A;
  --up: #F04438; --down: #12B76A; --field: #FFFaF3;
  --shadow: 0 10px 28px -14px rgba(92, 58, 20, .30);
  --r: 24px; --r-sm: 14px; --r-in: 14px;
  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-num: "Fredoka", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --tab-on: linear-gradient(135deg, #8B5CF6, #FF7AB6);
  color-scheme: light;
}
:root[data-skin="pro"] {
  --bg: #F3F5F8; --bg2: #E7EBF1; --card: #FFFFFF; --card2: #F8FAFC;
  --ink: #0F172A; --ink2: #334155; --muted: #64748B; --line: rgba(15, 23, 42, .12);
  --accent: #2563EB; --accent2: #0EA5E9; --gold: #D97706; --warn: #DC2626;
  --up: #DC2626; --down: #059669; --field: #FFFFFF;
  --shadow: 0 1px 2px rgba(15, 23, 42, .08), 0 6px 18px -12px rgba(15, 23, 42, .25);
  --r: 10px; --r-sm: 8px; --r-in: 6px;
  --font: "Segoe UI", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-num: ui-monospace, "Cascadia Mono", Consolas, "Microsoft JhengHei", monospace;
  --tab-on: #2563EB;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]), :root[data-skin="cute"]:not([data-theme="light"]) {
    --bg: #16121F; --bg2: #221B30; --card: #241E33; --card2: #2A2340; --field: #1E1830;
    --ink: #F5F0FB; --ink2: #D2C8E0; --muted: #9D93AE; --line: rgba(255, 255, 255, .10);
    --shadow: 0 10px 28px -14px rgba(0, 0, 0, .7); color-scheme: dark;
  }
  :root[data-skin="pro"]:not([data-theme="light"]) {
    --bg: #0B1220; --bg2: #111A2E; --card: #131D33; --card2: #172340; --field: #0F182B;
    --ink: #E5EAF3; --ink2: #B8C2D6; --muted: #8391AB; --line: rgba(255, 255, 255, .10);
    --accent: #60A5FA; --tab-on: #3B82F6; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #16121F; --bg2: #221B30; --card: #241E33; --card2: #2A2340; --field: #1E1830;
  --ink: #F5F0FB; --ink2: #D2C8E0; --muted: #9D93AE; --line: rgba(255, 255, 255, .10);
  --shadow: 0 10px 28px -14px rgba(0, 0, 0, .7); color-scheme: dark;
}
:root[data-theme="dark"][data-skin="pro"] {
  --bg: #0B1220; --bg2: #111A2E; --card: #131D33; --card2: #172340; --field: #0F182B;
  --ink: #E5EAF3; --ink2: #B8C2D6; --muted: #8391AB; --accent: #60A5FA; --tab-on: #3B82F6;
}

/* ── 2. Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.65 var(--font); min-height: 100vh; overflow-x: hidden;
}
:root[data-skin="cute"] body {
  background:
    radial-gradient(900px 420px at 110% -10%, color-mix(in srgb, var(--accent2) 18%, transparent), transparent 60%),
    radial-gradient(700px 380px at -10% 0%, color-mix(in srgb, var(--gold) 22%, transparent), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}
button { font: inherit; color: inherit; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.3; margin: 0; }
[hidden] { display: none !important; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 65%, transparent); outline-offset: 2px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }

/* ── 3. Chrome ─────────────────────────────────────────────────────── */
.top { padding: 18px 0 8px; }
.top .wrap { display: flex; align-items: center; gap: 14px; }
.brand { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.brand .pipi-box { width: 64px; height: 64px; flex: none; }
.brand .logo-pro { display: none; width: 44px; height: 44px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff;
  font: 700 24px/44px var(--font-num); text-align: center; }
:root[data-skin="pro"] .brand .pipi-box { display: none; }
:root[data-skin="pro"] .brand .logo-pro { display: block; }
.brand h1 { font-size: 1.55rem; font-weight: 900; letter-spacing: .02em; }
:root[data-skin="cute"] .brand h1 span { background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand p { margin: 0; color: var(--muted); font-size: .88rem; }
.skin-toggle {
  display: inline-flex; padding: 4px; gap: 2px; border-radius: 999px; background: var(--card);
  box-shadow: var(--shadow); border: 1px solid var(--line); flex: none;
}
:root[data-skin="pro"] .skin-toggle { border-radius: 8px; }
.skin-toggle button {
  min-height: 38px; min-width: 64px; padding: 0 12px; border: 0; border-radius: 999px; background: none;
  cursor: pointer; font-weight: 700; color: var(--ink2); font-size: .9rem;
}
:root[data-skin="pro"] .skin-toggle button { border-radius: 6px; }
.skin-toggle button.on { background: var(--tab-on); color: #fff; }

.mstatus {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 6px 0 12px;
  font-size: .85rem; color: var(--ink2);
}
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 12px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--line); font-weight: 700; }
:root[data-skin="pro"] .pill { border-radius: 6px; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.pill.live .dot { background: #12B76A; box-shadow: 0 0 0 3px color-mix(in srgb, #12B76A 25%, transparent); }
.pill.stale .dot, .pill.baked .dot { background: var(--gold); }
.pill.builtin .dot { background: var(--warn); }
.linkbtn { border: 0; background: none; color: var(--accent); font-weight: 700; cursor: pointer;
  min-height: 38px; padding: 0 6px; }

/* ── 4. Tabs ───────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 8px; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: none; display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 18px;
  border-radius: 999px; border: 1.5px solid var(--line); background: var(--card); cursor: pointer;
  font-weight: 800; color: var(--ink2); transition: transform .18s cubic-bezier(.3, 1.6, .5, 1);
}
:root[data-skin="pro"] .tab { border-radius: 8px; font-weight: 700; }
.tab .ic { font-size: 1.1rem; }
:root[data-skin="pro"] .tab .ic { display: none; }
.tab.on { background: var(--tab-on); color: #fff; border-color: transparent; }
:root[data-skin="cute"] .tab.on { transform: scale(1.04); box-shadow: 0 8px 18px -10px var(--accent); }

/* ── 5. Layout + form ─────────────────────────────────────────────── */
.grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 16px; align-items: start; }
.card { background: var(--card); border-radius: var(--r); box-shadow: var(--shadow); border: 1px solid var(--line);
  padding: 18px; min-width: 0; }
.card + .card { margin-top: 16px; }
.card h2 { font-size: 1.1rem; font-weight: 900; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.card h2 .sub { font-size: .8rem; font-weight: 500; color: var(--muted); }
.intro { margin: 0 0 12px; color: var(--ink2); font-size: .92rem; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 12px; }
.f { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.f.full { grid-column: 1 / -1; }
.f > label, .f > .lbl { font-size: .85rem; font-weight: 700; color: var(--ink2); }
.f .hint { font-size: .78rem; color: var(--muted); line-height: 1.45; }
.inp { position: relative; display: flex; align-items: center; }
.inp input, .inp select {
  width: 100%; min-height: 46px; padding: 0 12px; font-size: 16px; color: var(--ink);
  background: var(--field); border: 1.5px solid var(--line); border-radius: var(--r-in);
  font-family: var(--font-num); font-variant-numeric: tabular-nums;
}
.inp select { font-family: var(--font); }
.inp input:focus, .inp select:focus { border-color: var(--accent); outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.inp .unit { position: absolute; right: 12px; color: var(--muted); font-size: .85rem; pointer-events: none; }
.inp.has-unit input { padding-right: 48px; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button {
  flex: 1 1 auto; min-height: 42px; padding: 0 12px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--line); background: var(--field); font-weight: 700; color: var(--ink2); font-size: .92rem;
}
:root[data-skin="pro"] .seg button { border-radius: 6px; }
.seg button.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
:root[data-skin="cute"] .seg button.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.seg button.long.on { background: var(--up); border-color: var(--up); color: #fff; }
.seg button.short.on { background: var(--down); border-color: var(--down); color: #fff; }
.tag { display: inline-block; padding: 0 8px; border-radius: 999px; font-size: .72rem; font-weight: 700;
  background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); vertical-align: 1px; }
.tag.warn { background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); }
.actions { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.btn {
  min-height: 42px; padding: 0 18px; border: 0; border-radius: 999px; cursor: pointer; font-weight: 700;
  background: var(--tab-on); color: #fff;
}
.btn.ghost { background: var(--card2); color: var(--ink2); box-shadow: inset 0 0 0 1.5px var(--line); }
:root[data-skin="pro"] .btn { border-radius: 6px; }

/* ── 6. Results ────────────────────────────────────────────────────── */
.kpis { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
.kpi { background: var(--card2); border-radius: var(--r-sm); padding: 12px; border: 1px solid var(--line); min-width: 0; }
.kpi .k { font-size: .78rem; color: var(--muted); font-weight: 700; }
.kpi .v { font: 700 1.35rem/1.25 var(--font-num); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.kpi .s { font-size: .76rem; color: var(--muted); }
.kpi.main { background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 14%, var(--card2)), var(--card2)); }
.up { color: var(--up); } .down { color: var(--down); } .warnc { color: var(--warn); }
.tbl { width: 100%; border-collapse: collapse; font-size: .92rem; }
.tbl td { padding: 8px 4px; border-bottom: 1px dashed var(--line); vertical-align: top; }
.tbl td:last-child { text-align: right; white-space: nowrap; font-family: var(--font-num); font-variant-numeric: tabular-nums; font-weight: 700; }
.tbl tr.sum td { border-bottom: 0; border-top: 2px solid var(--line); font-weight: 900; }
.tbl .note { display: block; font-size: .76rem; color: var(--muted); font-weight: 400; }
.tbl tr.grp td { text-align: left; font-family: var(--font); padding-top: 14px; font-weight: 900; color: var(--accent); border-bottom: 0; font-size: .82rem; }
.warns { margin: 0 0 12px; padding: 0; list-style: none; display: grid; gap: 6px; }
.warns li { padding: 8px 12px; border-radius: var(--r-sm); background: color-mix(in srgb, var(--warn) 10%, transparent);
  color: var(--ink); font-size: .88rem; border-left: 4px solid var(--warn); }
.warns li.info { background: color-mix(in srgb, var(--accent) 9%, transparent); border-left-color: var(--accent); }
.empty { color: var(--muted); padding: 24px 0; text-align: center; }

/* steps = 算式拆解 */
.steps { counter-reset: st; margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.steps li { counter-increment: st; position: relative; padding: 10px 12px 10px 44px; border-radius: var(--r-sm);
  background: var(--card2); border: 1px solid var(--line); font-size: .9rem; overflow-wrap: anywhere; }
.steps li::before { content: counter(st); position: absolute; left: 10px; top: 10px; width: 24px; height: 24px;
  border-radius: 50%; background: var(--tab-on); color: #fff; font: 700 .8rem/24px var(--font-num); text-align: center; }
.steps b { font-weight: 900; }
.steps code { font-family: var(--font-num); font-size: .88rem; background: color-mix(in srgb, var(--accent) 8%, transparent);
  padding: 1px 6px; border-radius: 6px; }
.steps .why { display: block; color: var(--muted); font-size: .8rem; margin-top: 2px; }

/* ── 7. Learn (觀念教室) ──────────────────────────────────────────── */
.learn details { border-radius: var(--r-sm); background: var(--card2); border: 1px solid var(--line); margin-bottom: 8px; }
.learn summary { cursor: pointer; padding: 12px 14px; font-weight: 800; min-height: 44px; list-style: none;
  display: flex; align-items: center; gap: 8px; }
.learn summary::-webkit-details-marker { display: none; }
.learn summary::before { content: "＋"; color: var(--accent); font-weight: 900; }
.learn details[open] summary::before { content: "－"; }
.learn .ans { padding: 0 14px 12px; color: var(--ink2); font-size: .92rem; }
.learn .ans p { margin: 0 0 8px; }
.learn .ans ul { margin: 0 0 8px; padding-left: 20px; }
.learn table { border-collapse: collapse; font-size: .85rem; margin: 6px 0 8px; }
.learn th, .learn td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; }
.tblwrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ── 8. Chart + modal + footer ────────────────────────────────────── */
.chart svg { width: 100%; height: auto; display: block; }
.chart .axis { stroke: var(--line); }
.chart text { fill: var(--muted); font: 17px var(--font-num); }
.modal { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); display: flex; align-items: flex-end;
  justify-content: center; z-index: 50; padding: 16px; }
.modal .box { background: var(--card); border-radius: var(--r); max-width: 720px; width: 100%; max-height: 86vh;
  overflow: auto; padding: 18px; box-shadow: var(--shadow); }
@media (min-width: 768px) { .modal { align-items: center; } }
.modal h3 { margin-bottom: 8px; }
.mtbl { width: 100%; border-collapse: collapse; font-size: .88rem; }
.mtbl th, .mtbl td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
.mtbl th:first-child, .mtbl td:first-child { text-align: left; }
.foot { color: var(--muted); font-size: .8rem; padding: 24px 16px 40px; text-align: center; line-height: 1.7; }

/* 皮皮 (animation excerpted from 030 pipi.css) */
.pipi { width: 100%; height: 100%; overflow: visible; display: block; }
.pipi g, .pipi ellipse.pp-shadow { transform-box: view-box; }
.pipi .pp-all { transform-origin: 110px 205px; animation: pp-breathe 3.2s ease-in-out infinite; }
.pipi .pp-tail { transform-origin: 150px 170px; animation: pp-tail 2.2s ease-in-out infinite; }
.pipi .pp-head { transform-origin: 110px 140px; }
.pipi .pp-eyes-open { transform-origin: 110px 104px; animation: pp-blink 4.6s infinite; }
.pipi .pp-eyes-closed, .pipi .pp-zzz { display: none; }
.pipi .pp-arm-r { transform-origin: 146px 164px; }
.pipi .pp-wing-l { transform-origin: 70px 140px; animation: pp-flap-l 1.8s ease-in-out infinite; }
.pipi .pp-wing-r { transform-origin: 150px 140px; animation: pp-flap-r 1.8s ease-in-out infinite; }
.pose-wave .pp-arm-r { animation: pp-wave 1.1s ease-in-out infinite; }
.pose-jump .pp-all { animation: pp-jump .8s cubic-bezier(.3, 1.4, .5, 1) 2; }
@keyframes pp-breathe { 0%, 100% { transform: scale(1, 1); } 50% { transform: scale(1.02, .975); } }
@keyframes pp-tail { 0%, 100% { transform: rotate(-6deg); } 50% { transform: rotate(10deg); } }
@keyframes pp-blink { 0%, 93%, 100% { transform: scaleY(1); } 95% { transform: scaleY(.08); } }
@keyframes pp-wave { 0%, 100% { transform: rotate(0); } 50% { transform: rotate(-110deg) translate(-4px, -6px); } }
@keyframes pp-jump { 0%, 100% { transform: translateY(0) scale(1.04, .94); } 40% { transform: translateY(-34px) scale(.96, 1.05); } 70% { transform: translateY(0) scale(1.06, .92); } }
@keyframes pp-flap-l { 0%, 100% { transform: rotate(0); } 50% { transform: rotate(18deg); } }
@keyframes pp-flap-r { 0%, 100% { transform: rotate(0); } 50% { transform: rotate(-18deg); } }
.bubble { display: none; }
:root[data-skin="cute"] .bubble { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px; }
.bubble .pipi-mini { width: 46px; height: 46px; flex: none; }
.bubble .say { background: var(--card2); border: 1px solid var(--line); border-radius: 16px 16px 16px 4px;
  padding: 8px 12px; font-size: .9rem; color: var(--ink2); }
@media (prefers-reduced-motion: reduce) { .pipi * { animation: none !important; } .tab { transition: none; } }

/* ── 9. Media (last) ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .brand .pipi-box { width: 48px; height: 48px; }
  .brand h1 { font-size: 1.2rem; }
  .brand p { display: none; }
  .skin-toggle button { min-width: 52px; padding: 0 8px; }
  .fields { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kpi.main { grid-column: 1 / -1; }
  .card { padding: 14px; }
  .tab { padding: 0 14px; }
}
@media print { .skin-toggle, .tabs, .actions, .mstatus .linkbtn { display: none; } .card { box-shadow: none; } }