/* stickdriftcheck.com — design system
   Warm-graphite tool aesthetic, system monospace stack (zero external font requests).
   Base shell shared with the portfolio; extended with gamepad-tester components. */

:root {
  --bg: #14161a;
  --bg-raised: #1b1e24;
  --bg-inset: #0f1114;
  --border: #2b2f37;
  --border-soft: #21242b;
  --text: #e9e7e2;
  --text-dim: #a2a7b0;
  --text-faint: #62666f;
  --accent: #ffb454;
  --accent-dim: #b9822f;
  --accent-contrast: #201200;
  --ok: #6fd68a;
  --ok-bg: rgba(111, 214, 138, 0.12);
  --bad: #ff6b6b;
  --bad-bg: rgba(255, 107, 107, 0.14);
  --focus: #7cc6ff;
  --radius: 6px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Menlo", "Consolas",
    "Liberation Mono", monospace;
  --maxw: 860px;
}

:root[data-theme="light"] {
  --bg: #f7f5f1;
  --bg-raised: #ffffff;
  --bg-inset: #edeae3;
  --border: #ddd7cb;
  --border-soft: #e7e2d8;
  --text: #201c16;
  --text-dim: #5a5648;
  --text-faint: #928d7e;
  --accent: #b9722a;
  --accent-dim: #8f5a20;
  --accent-contrast: #fff8ee;
  --ok: #2f8f52;
  --ok-bg: rgba(47, 143, 82, 0.12);
  --bad: #c8362b;
  --bad-bg: rgba(200, 54, 43, 0.1);
  --focus: #0a6cbf;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f5f1;
    --bg-raised: #ffffff;
    --bg-inset: #edeae3;
    --border: #ddd7cb;
    --border-soft: #e7e2d8;
    --text: #201c16;
    --text-dim: #5a5648;
    --text-faint: #928d7e;
    --accent: #b9722a;
    --accent-dim: #8f5a20;
    --accent-contrast: #fff8ee;
    --ok: #2f8f52;
    --ok-bg: rgba(47, 143, 82, 0.12);
    --bad: #c8362b;
    --bad-bg: rgba(200, 54, 43, 0.1);
    --focus: #0a6cbf;
  }
}

* { box-sizing: border-box; }
html { color-scheme: dark light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 8px 12px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

button, select, input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 14px;
  transition: border-color .12s ease, background .12s ease, color .12s ease;
}
button:hover { border-color: var(--accent-dim); color: var(--accent); }
button:disabled { opacity: .5; cursor: not-allowed; }
button:disabled:hover { border-color: var(--border); color: var(--text); }
button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
  font-weight: 600;
}
button.primary:hover { color: var(--accent-contrast); filter: brightness(1.08); }
button.icon-btn { padding: 6px 10px; font-size: 13px; }

/* ---------- layout shell ---------- */
.site-header {
  border-bottom: 1px solid var(--border-soft);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 20;
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-mark {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.brand-mark .bracket { color: var(--accent); }
.brand-tag { color: var(--text-faint); font-size: 12px; display: none; }
@media (min-width: 640px) { .brand-tag { display: inline; } }

.header-actions { display: flex; align-items: center; gap: 8px; }

main { max-width: var(--maxw); margin: 0 auto; padding: 24px 20px 60px; }

.container-narrow { max-width: 700px; margin: 0 auto; padding: 40px 20px 60px; }
.container-narrow h1 { font-size: 22px; }
.container-narrow h2 { font-size: 16px; margin-top: 32px; }
.container-narrow p, .container-narrow li { color: var(--text-dim); }

/* ---------- hero ---------- */
.hero { text-align: center; padding: 20px 0 24px; }
.hero h1 {
  font-size: clamp(22px, 4vw, 32px);
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.hero p { color: var(--text-dim); margin: 0; font-size: 14.5px; }

/* ---------- connection prompt ---------- */
.prompt {
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 40px 26px;
  text-align: center;
  margin-bottom: 24px;
}
.prompt .prompt-icon {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 14px;
  color: var(--accent);
}
.prompt h2 { margin: 0 0 8px; font-size: 18px; }
.prompt p { margin: 0 auto; max-width: 46ch; color: var(--text-dim); font-size: 14px; }
.prompt .pulse { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .45; } }

/* ---------- device bar ---------- */
.device-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  background: var(--bg-inset);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 20px;
}
.device-bar .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--ok); flex: 0 0 auto;
  box-shadow: 0 0 0 3px var(--ok-bg);
}
.device-bar .device-name { font-weight: 700; color: var(--text); }
.device-bar .device-meta { color: var(--text-faint); font-size: 12.5px; }
.device-bar .device-select { margin-left: auto; }
.device-bar select {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
}

/* ---------- calibration / drift banner ---------- */
.calib {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 20px;
}
.calib .calib-text { flex: 1 1 260px; }
.calib .calib-text strong { color: var(--text); }
.calib .calib-text p { margin: 4px 0 0; font-size: 13px; color: var(--text-dim); }
.calib .calib-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.calib-progress {
  height: 6px; border-radius: 999px; background: var(--bg-inset);
  overflow: hidden; margin-top: 10px; flex-basis: 100%;
}
.calib-progress > span {
  display: block; height: 100%; width: 0;
  background: var(--accent); transition: width .1s linear;
}

/* ---------- sticks ---------- */
.sticks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
@media (min-width: 620px) { .sticks { grid-template-columns: 1fr 1fr; } }

.stick-card {
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}
.stick-card h3 {
  margin: 0 0 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  display: flex; align-items: center; justify-content: space-between;
}
.stick-pad {
  position: relative;
  width: 180px; height: 180px;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--bg-inset);
  border: 1px solid var(--border);
}
.stick-ring, .stick-deadzone, .stick-cross-h, .stick-cross-v {
  position: absolute; pointer-events: none;
}
.stick-deadzone {
  border-radius: 50%;
  border: 1px dashed var(--accent-dim);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
}
.stick-cross-h { left: 8px; right: 8px; top: 50%; height: 1px; background: var(--border); }
.stick-cross-v { top: 8px; bottom: 8px; left: 50%; width: 1px; background: var(--border); }
.stick-dot {
  position: absolute;
  width: 18px; height: 18px;
  left: 50%; top: 50%;
  margin: -9px 0 0 -9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
  will-change: transform;
}
.stick-dot.pressed { background: var(--focus); box-shadow: 0 0 0 5px color-mix(in srgb, var(--focus) 30%, transparent); }
.stick-readout {
  display: flex; justify-content: center; gap: 18px;
  margin-top: 14px;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}
.stick-readout .k { color: var(--text-faint); }
.stick-readout .v { color: var(--text); font-weight: 700; }
.stick-result {
  margin-top: 12px;
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700;
  padding: 5px 14px; border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.stick-result.pass { color: var(--ok); border-color: var(--ok); background: var(--ok-bg); }
.stick-result.drift { color: var(--bad); border-color: var(--bad); background: var(--bad-bg); }
.stick-result .offset { color: var(--text-faint); font-weight: 400; }

/* ---------- section shell ---------- */
.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 24px;
}
.panel > h2 {
  margin: 0 0 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
}

/* ---------- deadzone control ---------- */
.deadzone-control { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.deadzone-control input[type="range"] { flex: 1 1 180px; accent-color: var(--accent); }
.deadzone-control .dz-value { font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; min-width: 3.5ch; }

/* ---------- buttons grid ---------- */
.btn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}
.btn-cell {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--bg-inset);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  transition: background .06s ease, border-color .06s ease, color .06s ease;
}
.btn-cell .btn-name { color: var(--text-dim); }
.btn-cell .btn-val { color: var(--text-faint); font-variant-numeric: tabular-nums; font-size: 12px; }
.btn-cell.on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}
.btn-cell.on .btn-name, .btn-cell.on .btn-val { color: var(--accent-contrast); }

/* ---------- triggers ---------- */
.trigger-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.trigger-row:last-child { margin-bottom: 0; }
.trigger-row .t-label { width: 4ch; color: var(--text-dim); font-size: 13px; flex: 0 0 auto; }
.trigger-bar {
  flex: 1 1 auto; height: 14px;
  background: var(--bg-inset);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  overflow: hidden;
}
.trigger-bar > span {
  display: block; height: 100%; width: 0;
  background: var(--accent);
  will-change: width;
}
.trigger-row .t-val {
  width: 5ch; text-align: right;
  font-variant-numeric: tabular-nums; font-size: 13px;
  color: var(--text); font-weight: 700; flex: 0 0 auto;
}

/* ---------- rumble ---------- */
.rumble-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.rumble-row .rumble-note { color: var(--text-faint); font-size: 12.5px; }

/* ---------- axis table ---------- */
.axis-table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
.axis-table th, .axis-table td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border-soft); }
.axis-table th { color: var(--text-faint); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; font-size: 11px; }
.axis-table td.num { text-align: right; color: var(--text); font-weight: 700; }
.axis-table tr:last-child td { border-bottom: none; }

/* ---------- about ---------- */
.about-section { margin-top: 40px; }
.about-section h2 { font-size: 16px; }
.about-section p { color: var(--text-dim); }

/* ---------- faq / article list items ---------- */
.faq-item { margin-bottom: 18px; }
.faq-item h3 { font-size: 15px; margin: 0 0 6px; }
.faq-item p { margin: 0; color: var(--text-dim); }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-soft);
  margin-top: 40px;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  color: var(--text-faint);
  font-size: 12.5px;
}
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); }

/* ---------- misc ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }

::selection { background: var(--accent); color: var(--accent-contrast); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-inset); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }