/* =========================================================
   AUDIOMETRY — editorial-clinical aesthetic
   ========================================================= */

:root {
  /* paper / ink palette */
  --paper:        #f3ede1;
  --paper-deep:   #ebe3d2;
  --paper-rule:   #d8cfb9;
  --ink:          #15140f;
  --ink-soft:     #3a372d;
  --ink-faint:    #8a836f;
  --ink-mute:     #b8b09a;

  /* audiology accents */
  --right:        #b9302a;   /* deep crimson — right ear */
  --right-soft:   #e6b3ae;
  --left:         #1c3666;   /* deep cobalt — left ear */
  --left-soft:    #b6c0d4;
  --signal:       #c87b1f;   /* signal amber — active states */
  --signal-soft:  #efd8b3;

  /* severity bands */
  --sev-normal:   #cfe1c2;
  --sev-mild:     #e8d8a3;
  --sev-mod:      #ebbf86;
  --sev-modsev:   #db9b6f;
  --sev-sev:      #b0734d;
  --sev-prof:     #6b4530;

  /* type system */
  --serif:        "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans:         "Geist", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --mono:         "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* metrics */
  --rule:         1px solid var(--paper-rule);
  --rule-ink:     1px solid var(--ink);
  --hair:         0.5px solid var(--ink-mute);

  --col-gap:      28px;
  --row-gap:      28px;
  --container:    1240px;
  --pad-page:     56px;

  /* easing */
  --ease:         cubic-bezier(.22,.61,.36,1);
}

/* =========================================================
   RESET / BASE
   ========================================================= */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
}

body {
  min-height: 100vh;
  background-image:
    radial-gradient(rgba(21,20,15,0.04) 1px, transparent 1.4px);
  background-size: 4px 4px;
  background-position: 0 0;
}

/* paper grain on top */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
  background:
    radial-gradient(circle at 20% 10%, rgba(184,176,154,0.18), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(184,176,154,0.18), transparent 40%);
  mix-blend-mode: multiply;
}

a { color: inherit; text-decoration: none; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

/* =========================================================
   TYPOGRAPHY
   ========================================================= */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 14px;
  display: inline-block;
}

.display {
  font-family: var(--serif);
  font-weight: 320;
  font-style: normal;
  font-size: clamp(56px, 9vw, 132px);
  line-height: 0.94;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
  font-variation-settings: "opsz" 144, "SOFT" 30;
}
.display .kerned { letter-spacing: -0.04em; }
.display em.serif-italic {
  font-style: italic;
  font-weight: 280;
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
  color: var(--ink-soft);
}

.page-title {
  font-family: var(--serif);
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 340;
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  font-variation-settings: "opsz" 96, "SOFT" 50;
}
.page-title.small {
  font-size: clamp(24px, 3vw, 36px);
  margin: 0;
}

.card-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  font-variation-settings: "opsz" 36;
}

.micro-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 12px;
  color: var(--ink-soft);
}

.prose {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 380;
  color: var(--ink);
  margin: 0 0 16px;
  font-variation-settings: "opsz" 18;
}
.prose em { font-style: italic; color: var(--ink-soft); }
.prose strong { font-weight: 600; }

.serif-italic {
  font-family: var(--serif);
  font-style: italic;
  font-variation-settings: "opsz" 24, "SOFT" 80, "WONK" 1;
}

.mono { font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em; }
.dim  { color: var(--ink-faint); }
.warn   { color: var(--signal); }
.danger { color: var(--right); }

hr.hairline { border: 0; border-top: var(--hair); margin: 22px 0; }

/* =========================================================
   TOPBAR
   ========================================================= */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: var(--rule);
}
.topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px var(--pad-page);
  display: flex;
  align-items: baseline;
  gap: 32px;
}
.topbar-rule {
  height: 4px;
  background: linear-gradient(to right,
    var(--ink) 0 14%,
    transparent 14% 16%,
    var(--ink) 16% 18%,
    transparent 18% 24%,
    var(--ink) 24% 100%);
  opacity: 0.85;
  mix-blend-mode: multiply;
  max-width: var(--container);
  margin: 0 auto;
}

.brand {
  display: inline-flex; align-items: baseline; gap: 10px;
  font-family: var(--serif);
}
.brand-mark {
  display: inline-block; transform: translateY(4px);
  color: var(--ink);
}
.brand-name {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.01em;
  font-variation-settings: "opsz" 36;
}
.brand-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.topnav {
  display: flex;
  gap: 24px;
  margin-left: auto;
  margin-right: 24px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.topnav a {
  position: relative;
  padding: 4px 0;
  color: var(--ink-soft);
  transition: color 0.2s var(--ease);
}
.topnav a:hover { color: var(--ink); }
.topnav a.active {
  color: var(--ink);
}
.topnav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--ink);
}

.topbar-meta {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-faint);
}
.meta-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ink-mute);
  display: inline-block;
}
.meta-dot.live   { background: var(--signal); box-shadow: 0 0 0 4px rgba(200,123,31,0.18); }
.meta-dot.armed  { background: var(--right); box-shadow: 0 0 0 4px rgba(185,48,42,0.18); }

/* =========================================================
   LAYOUT
   ========================================================= */
main#app {
  position: relative; z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px var(--pad-page) 96px;
}
.view { animation: fadeUp 0.6s var(--ease) both; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--row-gap) var(--col-gap);
}
.col-span-4  { grid-column: span 4; }
.col-span-5  { grid-column: span 5; }
.col-span-6  { grid-column: span 6; }
.col-span-7  { grid-column: span 7; }
.col-span-8  { grid-column: span 8; }
.col-span-12 { grid-column: span 12; }

@media (max-width: 980px) {
  :root { --pad-page: 28px; }
  .col-span-4, .col-span-5, .col-span-6,
  .col-span-7, .col-span-8 { grid-column: span 12; }
  .topnav { display: none; }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  border-bottom: var(--hair);
  padding-bottom: 56px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 7fr 5fr;
  align-items: end;
  gap: 28px;
}
.hero > .display { grid-column: 1 / -1; }
.hero-lede {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.45;
  font-weight: 380;
  font-style: italic;
  color: var(--ink-soft);
  margin: 0;
  font-variation-settings: "opsz" 36, "SOFT" 60;
  max-width: 56ch;
}
.hero-cta {
  display: flex; gap: 14px;
  align-items: center;
  justify-content: flex-end;
}
.hero-disclaimer {
  grid-column: 1 / -1;
  margin: 32px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  border-top: var(--hair);
  padding-top: 14px;
  text-transform: uppercase;
}

@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; }
  .hero-cta { justify-content: flex-start; }
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background 0.18s var(--ease),
    color 0.18s var(--ease),
    transform 0.18s var(--ease),
    border-color 0.18s var(--ease);
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--right); border-color: var(--right); }

.btn-secondary { background: var(--paper-deep); }
.btn-secondary:hover { background: var(--ink); color: var(--paper); }

.btn-ghost {
  border-color: transparent;
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink); }

.btn-text {
  border: 0;
  padding: 6px 0;
  font-size: 11px;
  color: var(--ink-faint);
}
.btn-text:hover { color: var(--ink); }

.btn-small { padding: 8px 12px; font-size: 11px; }

.link {
  font-family: inherit;
  background: none; border: 0;
  border-bottom: 1px solid var(--ink);
  padding: 0 0 1px;
  color: var(--ink);
  cursor: pointer;
}
.link:hover { color: var(--right); border-color: var(--right); }

/* =========================================================
   CARDS
   ========================================================= */
.card {
  background: var(--paper-deep);
  border: 1px solid var(--paper-rule);
  padding: 32px;
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 0.5px solid var(--paper-rule);
  pointer-events: none;
}
.card-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px;
}
.card-head .card-title { margin: 0; }

/* summary */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.summary-empty { grid-column: 1 / -1; }
.summary-stat {
  display: flex; flex-direction: column; gap: 4px;
  padding: 16px 0;
  border-top: var(--hair);
}
.summary-stat .label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); }
.summary-stat .value {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 360;
  line-height: 1;
  font-variation-settings: "opsz" 96;
  font-feature-settings: "tnum";
}
.summary-stat .value.right { color: var(--right); }
.summary-stat .value.left  { color: var(--left); }
.summary-stat .sub { font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }

/* actions list */
.action-list { list-style: none; margin: 0; padding: 0; }
.action-list li { border-top: var(--hair); }
.action-list li:last-child { border-bottom: var(--hair); }
.action-list button {
  display: flex; justify-content: space-between; align-items: center;
  width: 100%;
  padding: 16px 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 380;
  text-align: left;
  color: var(--ink);
  transition: padding 0.2s var(--ease), color 0.2s var(--ease);
}
.action-list button:hover {
  padding-left: 8px;
  color: var(--right);
}
.action-list button:hover .mono { color: var(--right); }

/* trend mini chart */
.trend-wrap {
  background: var(--paper);
  border: var(--hair);
  padding: 16px;
  margin-bottom: 16px;
}
#trend-chart, #trend-detailed { width: 100%; height: 100%; display: block; }

.legend {
  display: flex; gap: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.swatch { display: inline-block; width: 14px; height: 2px; }
.swatch-right { background: var(--right); }
.swatch-left  { background: var(--left); }

/* tip */
.card-tip { background: transparent; border: 0; padding: 8px 0 0; }
.card-tip::before { display: none; }
.card-tip .eyebrow { color: var(--right); }
.tip-text {
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.35;
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-variation-settings: "opsz" 48, "SOFT" 80, "WONK" 1;
  max-width: 64ch;
}

/* =========================================================
   CALIBRATE
   ========================================================= */
.cal-panel { padding: 0; }
.cal-step {
  padding: 32px;
  border-bottom: var(--hair);
}
.cal-step:last-child { border-bottom: 0; }
.cal-step .mono.dim { display: block; margin-bottom: 8px; }
.cal-actions {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin: 18px 0;
}
.cal-confirm {
  font-family: var(--serif);
  font-size: 16px;
  margin-top: 12px;
}
.cal-confirm input { margin-right: 8px; transform: translateY(2px); }

.cal-noise-readout { margin-top: 12px; font-size: 18px; }

.cal-slider {
  display: grid;
  grid-template-columns: max-content 1fr max-content;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}
.cal-slider input[type=range] { width: 100%; }

.cal-finish {
  padding: 28px 32px;
  background: var(--ink);
  color: var(--paper);
  display: flex; justify-content: flex-end;
}
.cal-finish .btn-primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.cal-finish .btn-primary:hover { background: var(--right); color: var(--paper); border-color: var(--right); }

.cal-side .checklist { margin-top: 10px; }

.checklist {
  list-style: none;
  margin: 0; padding: 0;
}
.checklist li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-family: var(--serif);
  font-size: 16px;
  border-top: var(--hair);
}
.checklist li:first-child { border-top: 0; }
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 4px;
  color: var(--right);
  font-family: var(--mono);
  font-size: 12px;
}

/* =========================================================
   TEST
   ========================================================= */
.view-test { min-height: 60vh; position: relative; }

.test-gate {
  background: var(--paper-deep);
  border: 1px solid var(--paper-rule);
  padding: 64px;
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}
.test-gate::before {
  content: ""; position: absolute; inset: 8px;
  border: 0.5px solid var(--paper-rule);
  pointer-events: none;
}
.gate-list {
  list-style: none; margin: 0 0 32px; padding: 0;
}
.gate-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-top: var(--hair);
  font-family: var(--serif);
  font-size: 17px;
}
.gate-list li > .mono {
  flex: 0 0 32px;
}
.gate-list .gate-text { flex: 1; }
.gate-list .gate-text em { font-style: italic; color: var(--ink-soft); }
.gate-list li:last-child { border-bottom: var(--hair); }
.gate-list .mono { color: var(--ink-faint); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.gate-actions { display: flex; gap: 12px; }

/* test stage */
.test-stage { display: none; }
.test-stage.active { display: block; }

.test-meta {
  display: flex; justify-content: space-between; align-items: flex-end;
  border-bottom: var(--hair);
  padding-bottom: 24px; margin-bottom: 56px;
}
.test-progress {
  display: flex; flex-direction: column; gap: 8px;
  align-items: flex-end;
  min-width: 240px;
}
.progress-track {
  width: 240px; height: 2px;
  background: var(--paper-deep);
  position: relative;
  overflow: hidden;
}
.progress-fill {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: var(--ink);
  width: 0%;
  transition: width 0.4s var(--ease);
}

.test-pane {
  display: flex; flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 0;
  position: relative;
}

.freq-display {
  font-family: var(--serif);
  font-feature-settings: "tnum";
  font-size: clamp(96px, 16vw, 220px);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 320;
  font-variation-settings: "opsz" 144;
  position: relative;
}
.freq-display .freq-unit {
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  vertical-align: top;
  margin-left: 12px;
}
.freq-display .freq-tick {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 8px;
}

/* tone visualization rings */
.tone-vis {
  position: relative;
  width: 200px; height: 80px;
  margin: 32px 0;
  display: flex; align-items: center; justify-content: center;
}
.tone-vis .ring {
  position: absolute;
  border: 1px solid var(--ink);
  border-radius: 50%;
  width: 24px; height: 24px;
  opacity: 0;
}
.tone-vis.playing .ring {
  animation: ringExpand 1.6s var(--ease) infinite;
}
.tone-vis .ring-2 { animation-delay: 0.4s; }
.tone-vis .ring-3 { animation-delay: 0.8s; }
@keyframes ringExpand {
  0%   { width: 24px; height: 24px; opacity: 0.7; border-color: var(--ink); }
  100% { width: 160px; height: 160px; opacity: 0;  border-color: var(--right); }
}

/* hear button */
.btn-hear {
  position: relative;
  padding: 28px 64px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 380;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  display: inline-flex; align-items: baseline; gap: 18px;
}
.btn-hear:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}
.btn-hear:active { transform: translateY(0); }
.btn-hear .hear-key {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  border: 0.5px solid currentColor;
  padding: 3px 6px;
}
.btn-hear:hover .hear-key { color: rgba(243,237,225,0.7); }

.btn-hear.flash {
  animation: flash 0.25s var(--ease);
}
@keyframes flash {
  0%, 100% { background: var(--paper); }
  50% { background: var(--signal-soft); }
}

.test-help {
  margin-top: 32px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.test-state {
  margin: 8px 0 24px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  min-height: 18px;
  transition: color 0.2s var(--ease);
}
.test-state.tone   { color: var(--signal); }
.test-state.window { color: var(--ink); }
.test-state.heard  { color: var(--right); }

.test-controls {
  margin-top: 56px;
  display: flex; gap: 40px;
}
.test-controls .btn-text { padding: 6px 4px; }

.test-meta .test-mode-label { color: var(--ink-faint); }
.test-ear-right { color: var(--right) !important; }
.test-ear-left  { color: var(--left)  !important; }

/* =========================================================
   AUDIOGRAM RESULTS
   ========================================================= */
.results-head { margin-bottom: 8px; }

.audiogram-card { padding: 24px; }
.audiogram-wrap {
  background: var(--paper);
  border: var(--hair);
  padding: 20px;
}
#audiogram { width: 100%; height: auto; display: block; }

.audiogram-legend {
  display: flex; gap: 28px; flex-wrap: wrap;
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
}
.audiogram-legend .symbol {
  display: inline-block;
  width: 16px;
  font-family: var(--serif);
  font-size: 18px;
  text-align: center;
}
.audiogram-legend .symbol-right { color: var(--right); }
.audiogram-legend .symbol-left  { color: var(--left); }

/* interpretation */
.pta-grid { display: grid; gap: 16px; }
.pta-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: var(--hair);
}
.pta-row:first-child { border-top: 0; }
.pta-value {
  font-family: var(--serif);
  font-feature-settings: "tnum";
  font-size: 32px;
  font-weight: 360;
  font-variation-settings: "opsz" 48;
  line-height: 1;
}
.pta-class {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 8px;
  background: var(--paper);
  border: var(--hair);
}

.next-list {
  list-style: none; margin: 0; padding: 0;
}
.next-list li {
  font-family: var(--serif);
  font-size: 16px;
  padding: 10px 0 10px 24px;
  position: relative;
  border-top: var(--hair);
}
.next-list li:first-child { border-top: 0; }
.next-list li::before {
  content: "→";
  position: absolute; left: 0;
  color: var(--ink-faint);
  font-family: var(--mono);
}

.results-actions {
  margin-top: 28px;
  display: flex; flex-wrap: wrap; gap: 8px;
}

.bands {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: var(--hair);
}
.band {
  padding: 18px 14px;
  border-right: var(--hair);
  display: flex; flex-direction: column; gap: 6px;
  font-family: var(--serif);
  font-size: 14px;
}
.band:last-child { border-right: 0; }
.band span:first-child { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; }
.band-normal { background: var(--sev-normal); }
.band-mild   { background: var(--sev-mild); }
.band-mod    { background: var(--sev-mod); }
.band-modsev { background: var(--sev-modsev); color: var(--paper); }
.band-sev    { background: var(--sev-sev); color: var(--paper); }
.band-prof   { background: var(--sev-prof); color: var(--paper); }

@media (max-width: 880px) {
  .bands { grid-template-columns: repeat(2, 1fr); }
  .band { border-bottom: var(--hair); }
}

/* =========================================================
   HISTORY
   ========================================================= */
.history-controls {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px;
}
.history-table {
  width: 100%; border-collapse: collapse;
  font-family: var(--serif);
  font-feature-settings: "tnum";
}
.history-table th, .history-table td {
  text-align: left;
  padding: 12px 8px;
  border-bottom: var(--hair);
}
.history-table th { letter-spacing: 0.08em; text-transform: uppercase; }
.history-table tbody tr { transition: background 0.18s var(--ease); cursor: pointer; }
.history-table tbody tr:hover { background: var(--paper); }
.history-table .delete-btn { color: var(--ink-faint); font-size: 11px; }
.history-table .delete-btn:hover { color: var(--right); }

/* =========================================================
   TINNITUS
   ========================================================= */
.tin-control-row {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-top: var(--hair);
}
.tin-control-row:first-of-type { border-top: 0; }
.tin-actions { margin-top: 24px; display: flex; gap: 10px; }

.seg {
  display: inline-flex;
  border: 1px solid var(--ink);
}
.seg button {
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--paper-deep);
  color: var(--ink);
  border-right: 1px solid var(--ink);
  transition: background 0.18s var(--ease);
}
.seg button:last-child { border-right: 0; }
.seg button.active { background: var(--ink); color: var(--paper); }
.seg button:hover:not(.active) { background: var(--paper); }

.match-list {
  list-style: none; margin: 0; padding: 0;
}
.match-list li {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 12px;
  padding: 12px 0;
  border-top: var(--hair);
  font-family: var(--mono);
  font-size: 12px;
  align-items: center;
}
.match-list li:first-child { border-top: 0; }
.match-list .delete { color: var(--ink-faint); cursor: pointer; }
.match-list .delete:hover { color: var(--right); }
.match-list .empty {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-faint);
  grid-column: 1 / -1;
  text-align: center;
  padding: 24px 0;
  font-size: 16px;
}

/* range inputs */
input[type=range] {
  -webkit-appearance: none; appearance: none;
  height: 2px;
  background: var(--ink-mute);
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  background: var(--ink);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.18s var(--ease);
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); background: var(--right); }
input[type=range]::-moz-range-thumb {
  width: 18px; height: 18px;
  background: var(--ink);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

/* =========================================================
   NOISE METER
   ========================================================= */
.meter-display {
  display: flex; align-items: baseline; gap: 16px;
  border-bottom: var(--hair);
  padding-bottom: 16px; margin-bottom: 24px;
}
.meter-value {
  font-family: var(--serif);
  font-feature-settings: "tnum";
  font-size: 120px;
  font-weight: 320;
  font-variation-settings: "opsz" 144;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.04em;
}
.meter-unit {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.meter-bar {
  height: 8px;
  background: var(--paper);
  border: var(--hair);
  position: relative;
  overflow: hidden;
}
.meter-bar-fill {
  position: absolute;
  inset: 0;
  width: 0;
  background: linear-gradient(to right,
    var(--sev-normal) 0%,
    var(--sev-mild) 35%,
    var(--sev-mod) 55%,
    var(--sev-sev) 75%,
    var(--right) 90%,
    #4a1410 100%);
  transition: width 0.12s linear;
}

.meter-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 24px 0;
  padding: 16px 0;
  border-top: var(--hair);
  border-bottom: var(--hair);
}
.meter-stats > div { display: flex; flex-direction: column; gap: 6px; }
.meter-stats .mono:last-child {
  font-size: 22px;
  font-family: var(--serif);
  font-feature-settings: "tnum";
  font-variation-settings: "opsz" 36;
}
.meter-actions { display: flex; gap: 10px; }

.ref-list { list-style: none; margin: 0; padding: 0; }
.ref-list li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-top: var(--hair);
  font-family: var(--serif);
  font-size: 16px;
  align-items: baseline;
}
.ref-list li:first-child { border-top: 0; }
.ref-list .mono { font-size: 13px; color: var(--ink); }

/* =========================================================
   LEARN
   ========================================================= */
.learn-article .prose { font-size: 16px; }
.learn-article.disclaimer {
  background: var(--ink);
  color: var(--paper);
}
.learn-article.disclaimer::before { border-color: rgba(243,237,225,0.18); }
.learn-article.disclaimer .card-title,
.learn-article.disclaimer .prose { color: var(--paper); }
.learn-article.disclaimer em { color: var(--signal-soft); }

/* =========================================================
   FOOTER
   ========================================================= */
.foot {
  border-top: var(--rule);
  margin-top: 96px;
  background: var(--paper);
  position: relative; z-index: 2;
}
.foot-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px var(--pad-page);
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
}
.foot .brand-name { color: var(--ink); }

/* =========================================================
   MODAL
   ========================================================= */
.modal[hidden] { display: none; }
.modal {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(21,20,15,0.4);
  backdrop-filter: blur(6px);
}
.modal-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 40px;
  max-width: 520px;
  width: 100%;
  z-index: 1;
  box-shadow: 12px 12px 0 var(--ink);
  animation: modalIn 0.32s var(--ease);
}
@keyframes modalIn {
  from { opacity: 0; transform: translate(-6px, -6px); }
  to   { opacity: 1; transform: none; }
}
.modal-x {
  position: absolute; top: 12px; right: 14px;
  font-size: 22px; line-height: 1;
  color: var(--ink-faint);
}
.modal-x:hover { color: var(--right); }
.modal-body h3 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 360;
  margin: 0 0 14px;
}
.modal-body p { font-family: var(--serif); font-size: 16px; }
.modal-actions { display: flex; gap: 10px; margin-top: 24px; }

/* =========================================================
   TOAST
   ========================================================= */
.toast[hidden] { display: none; }
.toast {
  position: fixed; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 14px 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  animation: toastIn 0.4s var(--ease);
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* =========================================================
   PRINT
   ========================================================= */
@media print {
  body::before, .topbar, .foot, .results-actions { display: none !important; }
  body { background: white; }
  .card { background: white; border: 0.5px solid #888; box-shadow: none; }
  .card::before { display: none; }
}