/* mousecal - precision-instrument look: drafting-blue paper, ink, one orange needle. */

:root {
  --bg: #e8edf2;
  --panel: #f5f8fa;
  --ink: #10202f;
  --ink-2: #44566a;
  --rule: #b4c0cc;
  --rule-2: #cfd8e0;
  --scale: #1d5a96;
  --needle: #d2440c;
  --needle-soft: rgba(210, 68, 12, 0.16);
  --pass: #17794a;
  --fail: #b3261e;
  --warn-ink: #7a4f00;
  --warn-bg: #fbf1d9;
  --focus: #1d5a96;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Heiti TC", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1721;
    --panel: #142030;
    --ink: #e2eaf2;
    --ink-2: #9db0c3;
    --rule: #2c3d4f;
    --rule-2: #223142;
    --scale: #6cb2f0;
    --needle: #ff7a3d;
    --needle-soft: rgba(255, 122, 61, 0.2);
    --pass: #4cc38a;
    --fail: #ff6b62;
    --warn-ink: #f0c869;
    --warn-bg: #2b2412;
    --focus: #8cc6f7;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  background-color: #e8edf2; /* explicit fallback */
  color: var(--ink);
  font: 400 16px/1.65 var(--font-sans);
  overflow-wrap: anywhere;
}
@media (prefers-color-scheme: dark) { body { background-color: #0e1721; } }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
a { color: var(--scale); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
[hidden] { display: none !important; }

/* ---- header with a ruler strip ---- */
.top { border-bottom: 1px solid var(--rule); background: var(--panel); }
.top-inner {
  max-width: 1120px; margin: 0 auto; padding: 14px 20px 10px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; min-width: 0; }
.brand-mark {
  width: 18px; height: 18px; align-self: center; flex: none;
  border-left: 2px solid var(--ink); border-bottom: 2px solid var(--ink); position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 20px; height: 2px;
  background: var(--needle); transform-origin: left center; transform: rotate(-24deg);
}
.brand-name { font: 600 17px/1 var(--font-mono); letter-spacing: 0.02em; }
.brand-tag { color: var(--ink-2); font-size: 14px; }
.lang {
  font: 500 14px/1 var(--font-mono); padding: 9px 12px; cursor: pointer; flex: none;
  color: var(--ink); background: transparent; border: 1px solid var(--rule); border-radius: 2px;
}
.lang:hover { border-color: var(--ink); }
.ruler {
  height: 12px;
  background-image:
    repeating-linear-gradient(90deg, var(--ink-2) 0 1px, transparent 1px 10px),
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 50px);
  background-size: 100% 6px, 100% 12px;
  background-repeat: no-repeat;
  background-position: 0 100%, 0 100%;
  opacity: 0.45;
}

/* ---- blocks ---- */
main { max-width: 1120px; margin: 0 auto; padding: 0 20px 40px; }
.block { padding: 36px 0 8px; border-bottom: 1px solid var(--rule); }
.block:last-child { border-bottom: 0; }
.eyebrow {
  margin: 0 0 18px; font: 500 12px/1 var(--font-mono); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-2); display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
}
.idx { color: var(--needle); font-weight: 600; }
.stamp {
  font: 600 13px/1 var(--font-sans); letter-spacing: 0.08em; color: var(--needle);
  border: 2px solid var(--needle); padding: 4px 8px; transform: rotate(-3deg); border-radius: 2px;
}
h1 { font: 700 clamp(28px, 5vw, 44px)/1.15 var(--font-sans); margin: 0 0 14px; letter-spacing: -0.01em; }
h2 { font: 700 26px/1.2 var(--font-sans); margin: 0; }
h3 { font: 700 15px/1.4 var(--font-sans); margin: 0 0 8px; }
.lead { font-size: 17px; color: var(--ink-2); margin: 0 0 16px; max-width: 34em; }
.small-note { font-size: 14px; color: var(--ink-2); margin: 6px 0 0; }

/* ---- measure ---- */
.measure-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 32px; align-items: start; }
.mini-steps { margin: 0 0 18px; padding: 0; list-style: none; counter-reset: ms; }
.mini-steps li { counter-increment: ms; display: flex; gap: 12px; align-items: baseline; margin: 6px 0; }
.mini-steps li::before { content: counter(ms); font: 600 14px/1 var(--font-mono); color: var(--scale); border: 1px solid var(--scale); width: 24px; height: 24px; display: inline-grid; place-items: center; flex: none; }
.mode-banner {
  font: 500 13px/1.5 var(--font-mono); border-left: 3px solid var(--scale); padding: 6px 12px;
  background: var(--panel); margin: 0 0 12px;
}
.notice {
  margin: 12px 0 0; padding: 10px 12px; font-size: 14px; border-left: 3px solid var(--scale);
  background: var(--panel); color: var(--ink-2);
}
.notice.warn { border-left-color: var(--warn-ink); background: var(--warn-bg); color: var(--warn-ink); }

.pad-frame {
  position: relative; background: var(--panel); border: 1px solid var(--ink);
  aspect-ratio: 16 / 9; min-height: 200px;
}
/* corner registration marks */
.pad-frame::before, .pad-frame::after {
  content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none; z-index: 2;
  border: 2px solid var(--needle);
}
.pad-frame::before { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.pad-frame::after { bottom: -2px; right: -2px; border-left: 0; border-top: 0; }
#pad { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; touch-action: none; }
.pad-frame.locked #pad { cursor: none; }
.pad-overlay {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-end;
  gap: 2px; padding: 16px 18px; pointer-events: none;
}
.pad-cta {
  font: 700 22px/1.2 var(--font-sans); background: var(--panel); padding: 2px 8px 2px 0;
  box-shadow: -8px 0 0 var(--panel), 8px 0 0 var(--panel);
}
.pad-sub { font: 400 13px/1.4 var(--font-mono); color: var(--ink-2); background: var(--panel); }
.pad-frame.locked .pad-overlay { display: none; }
.hud {
  position: absolute; top: 0; left: 0; right: 0; display: flex; gap: 0; z-index: 1;
  border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--panel) 90%, transparent);
}
.hud-cell { flex: 1; padding: 8px 12px; display: flex; flex-direction: column; border-right: 1px solid var(--rule); min-width: 0; }
.hud-cell:last-child { border-right: 0; }
.hud-k { font: 500 11px/1.2 var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); }
.hud-v { font: 600 24px/1.2 var(--font-mono); font-variant-numeric: tabular-nums; }
.hud-s { font: 400 11px/1.2 var(--font-mono); color: var(--ink-2); }
.pad-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
.status { margin: 0; font-size: 14px; color: var(--ink-2); flex: 1 1 14em; }

/* ---- buttons ---- */
.btn {
  font: 700 16px/1.2 var(--font-sans); padding: 12px 18px; cursor: pointer; border-radius: 2px;
  border: 2px solid var(--ink); background: var(--ink); color: var(--bg);
}
.btn:hover:not(:disabled) { background: var(--scale); border-color: var(--scale); color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.small { font-size: 14px; padding: 8px 14px; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover:not(:disabled) { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn.big { font-size: 20px; padding: 16px 26px; }
.btn.accent { background: var(--needle); border-color: var(--needle); color: #fff; }
.btn.accent:hover:not(:disabled) { background: var(--ink); border-color: var(--ink); }
.copy-msg { margin: 6px 0 0; min-height: 1.5em; font: 500 14px/1.5 var(--font-mono); color: var(--pass); }
.copy-msg.inline { display: inline-block; margin-left: 8px; }

/* ---- result ---- */
.result-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 32px; align-items: start; }
.dial-fig { margin: 0; }
#dial { width: 100%; max-width: 420px; height: auto; display: block; }
.readout { margin: 0 0 6px; display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 14px; }
.rd-theta { font: 600 clamp(56px, 11vw, 96px)/1 var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -0.03em; color: var(--needle); }
.rd-se { font: 500 clamp(22px, 4vw, 34px)/1 var(--font-mono); font-variant-numeric: tabular-nums; color: var(--ink-2); }
.sentence { font: 700 22px/1.35 var(--font-sans); margin: 0 0 8px; }
.conf { margin: 0 0 6px; font: 500 14px/1.4 var(--font-mono); }
.conf::before { content: ""; display: inline-block; width: 10px; height: 10px; margin-right: 8px; background: var(--ink-2); }
.conf[data-level="high"]::before { background: var(--pass); }
.conf[data-level="medium"]::before { background: var(--warn-ink); }
.conf[data-level="low"]::before, .conf[data-level="insufficient"]::before { background: var(--fail); }
.warnings { list-style: none; padding: 0; margin: 10px 0 0; }
.warnings li { margin: 8px 0; padding: 8px 12px; border-left: 3px solid var(--warn-ink); background: var(--warn-bg); color: var(--warn-ink); font-size: 14px; }

.verdict { margin: 18px 0 0; padding: 14px 16px; border: 2px solid var(--rule); background: var(--panel); }
.verdict[data-state="pass"] { border-color: var(--pass); }
.verdict[data-state="fail"] { border-color: var(--fail); }
.verdict-head { display: flex; gap: 12px; align-items: center; }
.vicon { width: 44px; height: 44px; flex: none; fill: none; stroke-width: 3; stroke-linecap: square; }
.verdict[data-state="pass"] .vicon { stroke: var(--pass); }
.verdict[data-state="fail"] .vicon { stroke: var(--fail); }
.verdict-text { margin: 0; font: 700 20px/1.3 var(--font-sans); }
.before-after { margin: 8px 0 0; font: 500 15px/1.5 var(--font-mono); font-variant-numeric: tabular-nums; }
.fail-next { margin: 8px 0 0; font-weight: 500; }
.hint { margin: 12px 0 0; padding: 10px 12px; background: var(--warn-bg); color: var(--warn-ink); font-size: 14px; }
.hint-title { margin: 0 0 4px; font-weight: 700; }
.hint ul { margin: 4px 0 8px; padding-left: 1.2em; }
.hint-cmd-label { margin: 6px 0 4px; }

.stats { margin-top: 18px; border-top: 1px solid var(--rule); padding-top: 10px; }
summary { cursor: pointer; font-weight: 700; padding: 6px 0; }
.stat-list { display: grid; grid-template-columns: auto 1fr; gap: 2px 18px; margin: 8px 0 14px; font-size: 14px; }
.stat-list dt { color: var(--ink-2); }
.stat-list dd { margin: 0; font: 500 14px/1.6 var(--font-mono); font-variant-numeric: tabular-nums; }
.hist-title { font-size: 13px; color: var(--ink-2); margin: 0 0 4px; }
#hist { width: 100%; max-width: 480px; height: auto; display: block; }

/* ---- fix ---- */
.paths { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 0; }
#fix[data-first="phys"] .path-phys { order: -1; }
.path { padding: 0 32px 28px 0; }
.path + .path { padding: 0 0 28px 32px; border-left: 1px solid var(--rule); }
#fix[data-first="phys"] .path-phys { padding: 0 32px 28px 0; border-left: 0; }
#fix[data-first="phys"] .path-win { padding: 0 0 28px 32px; border-left: 1px solid var(--rule); }
.path-head { margin-bottom: 14px; }
.path-sub { margin: 2px 0 0; color: var(--ink-2); font-size: 14px; }
.big-steps { list-style: none; margin: 0; padding: 0; counter-reset: bs; }
.big-steps > li { counter-increment: bs; display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 14px; padding: 14px 0; border-top: 1px solid var(--rule-2); }
.big-steps > li::before { content: counter(bs); font: 600 40px/1 var(--font-mono); color: var(--scale); }
.step-title { margin: 2px 0 10px; font-weight: 700; font-size: 17px; }
.keys { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; margin: 6px 0 4px; }
.keygroup { display: inline-flex; align-items: center; gap: 4px; }
.keygroup i { font-style: normal; color: var(--ink-2); font-family: var(--font-mono); }
.arrow { font-style: normal; color: var(--needle); font: 600 20px/1 var(--font-mono); }
kbd {
  display: inline-block; min-width: 2.4em; text-align: center; padding: 7px 10px 6px;
  font: 600 15px/1 var(--font-mono); color: var(--ink); background: var(--panel);
  border: 1px solid var(--ink-2); border-bottom-width: 4px; border-radius: 4px;
}
.cmd {
  margin: 12px 0 0; padding: 10px 12px; font: 400 13px/1.55 var(--font-mono); background: var(--panel);
  border: 1px solid var(--rule); white-space: pre-wrap; word-break: break-all; overflow-wrap: anywhere;
  user-select: all;
}
.cmd.small-cmd { font-size: 12px; }
.cmd.dim { opacity: 0.55; }
.disclose { margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--rule); font-size: 14px; }
.disclose ul { margin: 0 0 8px; padding-left: 1.2em; }
.disclose li { margin: 4px 0; }
.disclose p { margin: 6px 0; }
.uninstall { margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--rule); }
.wedge-fig { margin: 0 0 8px; }
#wedge { width: 100%; max-width: 300px; height: auto; display: block; }

/* ---- advanced / footer ---- */
.adv-body { padding: 8px 0 18px; max-width: 46em; }
.field { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 10px 0 0; font-size: 14px; }
.field input { font: 500 15px/1 var(--font-mono); width: 7em; padding: 8px; background: var(--panel); color: var(--ink); border: 1px solid var(--ink-2); border-radius: 2px; }
.adv-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 10px 0; }
.json-out { width: 100%; font: 400 12px/1.5 var(--font-mono); background: var(--panel); color: var(--ink); border: 1px solid var(--rule); padding: 8px; resize: vertical; }
.foot { max-width: 1120px; margin: 0 auto; padding: 8px 20px 48px; font-size: 13px; color: var(--ink-2); }
.foot p { margin: 4px 0; }

/* ---- svg theming ---- */
svg text { font-family: var(--font-mono); }
.svg-ink { stroke: var(--ink); }
.svg-scale { stroke: var(--scale); }
.svg-label { fill: var(--ink-2); font-size: 11px; }
.svg-needle { stroke: var(--needle); }
.svg-fill { fill: var(--needle-soft); }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .measure-grid, .result-grid, .paths { grid-template-columns: minmax(0, 1fr); }
  .path, .path + .path, #fix[data-first="phys"] .path-phys, #fix[data-first="phys"] .path-win { padding: 0 0 24px 0; border-left: 0; }
  .path + .path { border-top: 1px solid var(--rule); padding-top: 24px; }
  #fix[data-first="phys"] .path-win { border-top: 1px solid var(--rule); padding-top: 24px; }
  #fix[data-first="phys"] .path-phys + .path-win { border-top: 1px solid var(--rule); }
}
@media (max-width: 520px) {
  main, .top-inner, .foot { padding-left: 14px; padding-right: 14px; }
  .brand-tag { display: none; }
  .big-steps > li { grid-template-columns: 36px minmax(0, 1fr); gap: 10px; }
  .big-steps > li::before { font-size: 30px; }
  .btn.big { width: 100%; font-size: 18px; padding: 16px 12px; }
  .hud-v { font-size: 20px; }
  .hud-cell { padding: 6px 8px; }
  .pad-cta { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (prefers-reduced-motion: no-preference) {
  .btn { transition: background-color 0.12s, color 0.12s, border-color 0.12s; }
}

/* one-click (mousecal://) block above the first-install steps */
.oneclick { margin: 0 0 22px; padding: 0 0 18px; border-bottom: 1px solid var(--rule-2); }
.first-title { margin: 0 0 10px; font-size: 18px; }