@font-face {
  font-family: 'OpticianSans';
  src: url('https://cdn.jsdelivr.net/gh/anewtypeofinterference/Optician-Sans@master/Web-TT/Optician-Sans.woff') format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --page: #edf1f6;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --ink: #0f172a;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --brand: #2563eb;
  --brand-2: #1d4ed8;
  --success: #15803d;
  --danger: #b91c1c;
  --chart-bg: #ffffff;
  --chart-fg: #000000;
  --shadow: 0 20px 60px rgba(15, 23, 42, .10);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --sidebar: 620px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 34%),
    linear-gradient(180deg, #f8fafc 0%, var(--page) 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

.app {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 22px;
  gap: 18px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 2px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.mark {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: #0f172a;
  color: white;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: -.03em;
  box-shadow: 0 14px 35px rgba(15,23,42,.18);
}

.brand h1 {
  margin: 0;
  font-size: clamp(20px, 2vw, 28px);
  letter-spacing: -.035em;
  line-height: 1.08;
}
.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(255,255,255,.88);
  color: var(--ink);
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  box-shadow: 0 1px 0 rgba(15,23,42,.04);
  transition: transform .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.btn:hover {
  transform: translateY(-1px);
  border-color: #94a3b8;
  box-shadow: 0 10px 22px rgba(15,23,42,.08);
}
.btn.primary {
  border-color: var(--brand);
  background: linear-gradient(180deg, var(--brand), var(--brand-2));
  color: white;
  box-shadow: 0 14px 28px rgba(37,99,235,.22);
}
.btn.ghost { background: transparent; box-shadow: none; }

.layout {
  min-height: 0;
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  gap: 18px;
}

.panel, .chart-shell {
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(203,213,225,.9);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.panel-head {
  padding: 22px 22px 16px;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.panel-head h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -.025em;
}
.panel-head p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.panel-body {
  min-height: 0;
  overflow: auto;
  padding: 18px 22px 22px;
  display: grid;
  gap: 18px;
}

.section {
  display: grid;
  gap: 12px;
}
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.field {
  display: grid;
  gap: 7px;
}
.field span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.field small {
  color: var(--muted-2);
  line-height: 1.35;
}
select, input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
select:focus, input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 5px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.segmented button {
  border: 0;
  background: transparent;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 800;
  padding: 10px 8px;
  min-height: 40px;
}
.segmented button.active {
  background: white;
  color: var(--ink);
  box-shadow: 0 8px 18px rgba(15,23,42,.08);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.stat {
  display: block;
  padding: 10px 10px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  min-width: 0;
}
.stat label {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .045em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stat strong {
  display: block;
  margin-top: 4px;
  text-align: left;
  font-size: 15px;
  letter-spacing: -.02em;
  min-width: 0;
  overflow-wrap: anywhere;
}
.stat.wide { grid-column: 1 / -1; }

.notice {
  padding: 13px 14px;
  border-radius: 18px;
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  color: #1e3a8a;
  font-size: 13px;
  line-height: 1.45;
}
.notice strong { color: #1d4ed8; }

.panel-foot {
  border-top: 1px solid var(--line);
  padding: 16px 22px 20px;
  display: grid;
  gap: 10px;
  background: rgba(248,250,252,.72);
}

.calibration-bar-wrap {
  height: auto;
  min-height: 52px;
  overflow-x: auto;
  overflow-y: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  padding: 10px 12px 28px;
  max-width: 100%;
  box-sizing: border-box;
}
.calibration-bar {
  /* width set in JS = targetMm * pxPerMm; never shrink below that */
  width: 542px;
  min-width: 542px;
  max-width: none !important;
  height: clamp(10px, 1.2vh, 14px);
  border-radius: 999px;
  background: #000;
  position: relative;
  flex-shrink: 0 !important;
  display: block;
  box-sizing: content-box;
}
.calibration-bar::after {
  content: attr(data-label);
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  color: var(--muted);
  font-size: clamp(11px, 1.4vw, 13px);
  font-weight: 700;
  white-space: nowrap;
}

.chart-shell {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.chart-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.72);
}
.chart-title {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--success);
  box-shadow: 0 0 0 5px rgba(21,128,61,.12);
  flex: 0 0 auto;
}
.chart-title strong {
  display: block;
  font-size: 15px;
}
.chart-title span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}
.font-status {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  white-space: nowrap;
}

.chart-area {
  min-height: 0;
  overflow: auto;
  background: var(--chart-bg);
  color: var(--chart-fg);
  display: grid;
  place-items: center;
  padding: 46px 44px;
}

.exam-card {
  /* Grow with the letter row — never clip the 5th optotype */
  width: max-content;
  min-width: min(100%, 420px);
  max-width: none;
  min-height: min(70vh, 720px);
  display: grid;
  place-items: center;
  border: 1px solid #eef2f7;
  border-radius: 30px;
  background: #fff;
  overflow: visible;
}

.chart-inner {
  width: max-content;
  max-width: none;
  display: grid;
  justify-items: start;
  align-items: center;
  gap: 18px;
  padding: 24px 28px;
}

.line-row {
  width: max-content;
  max-width: none;
  display: inline-flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: center;
  gap: 20px;
  min-height: 1.2em;
  padding: 6px 0;
}
.line-label {
  position: static;
  flex: 0 0 auto;
  color: #475569;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
  text-align: right;
  letter-spacing: -.01em;
  white-space: nowrap;
  pointer-events: none;
  min-width: 7.5rem;
}
.line-label .sub {
  display: block;
  color: #64748b;
  font-weight: 700;
  margin-top: 2px;
}

.glyph-line {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  overflow: visible;
}

.glyph, .single-glyph {
  font-family: 'OpticianSans', sans-serif;
  line-height: .88;
  height: 1em;
  width: 1em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #000;
  user-select: none;
  font-weight: 400;
  font-kerning: none;
  letter-spacing: 0;
  transform: translateY(-.015em);
}

.single-wrap {
  min-height: 54vh;
  display: grid;
  place-items: center;
}

.line-row.single-row {
  min-height: min(54vh, 520px);
}
.chart-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 7px;
  margin: 0 2px;
  border-radius: 7px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--ink);
  font-size: 11px;
  font-weight: 800;
}

body.exam-mode {
  background: #fff;
}
body.exam-mode .app {
  padding: 0;
  display: block;
  min-height: 100vh;
}
body.exam-mode .header,
body.exam-mode .panel,
body.exam-mode .chart-toolbar,
body.exam-mode .chart-footer {
  display: none;
}
body.exam-mode .layout {
  display: block;
  min-height: 100vh;
}
body.exam-mode .chart-shell {
  border: 0;
  border-radius: 0;
  box-shadow: none;
  min-height: 100vh;
  display: block;
}
body.exam-mode .chart-area {
  min-height: 100vh;
  padding: 28px;
  overflow: auto;
  justify-items: center;
  align-items: center;
}
body.exam-mode .exam-card {
  border: 0;
  border-radius: 0;
  min-height: calc(100vh - 56px);
  /* At least full width, but expand if the row is wider */
  width: max-content;
  min-width: 100%;
  max-width: none;
  place-items: center;
}
body.exam-mode .chart-inner {
  width: max-content;
  max-width: none;
  padding: 24px 32px;
  justify-items: center;
}

/* Fullscreen / exam-mode calibration overlay (sidebar is hidden) */
#fsCalibrate {
  display: none;
  position: fixed;
  left: 50%;
  bottom: max(12px, env(safe-area-inset-bottom, 12px));
  transform: translateX(-50%);
  z-index: 70;
  /* JS sets --fs-cal-width from bar + viewport; CSS keeps it on-screen */
  width: var(--fs-cal-width, min(92vw, 720px));
  max-width: calc(100vw - 24px);
  max-height: calc(100vh - 24px);
  padding: clamp(10px, 1.6vw, 16px) clamp(12px, 2vw, 18px);
  border-radius: clamp(12px, 2vw, 18px);
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.96);
  box-shadow: 0 16px 40px rgba(15,23,42,.18);
  gap: clamp(8px, 1.2vh, 12px);
  box-sizing: border-box;
  overflow: auto;
  overscroll-behavior: contain;
}
body.exam-mode #fsCalibrate,
body.is-fullscreen #fsCalibrate {
  display: grid;
}
body.fs-cal-hidden #fsCalibrate {
  display: none !important;
}
#fsCalibrate .section-title {
  margin: 0;
  font-size: clamp(13px, 1.8vw, 16px);
}
#fsCalibrate .fs-cal-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(6px, 1vw, 10px);
  align-items: end;
}
@media (max-width: 640px), (max-height: 500px) {
  #fsCalibrate .fs-cal-row {
    grid-template-columns: 1fr;
  }
}
#fsCalibrate .calibration-bar-wrap {
  max-width: 100%;
  width: 100%;
}
#fsCalibrate .hint {
  margin: 0;
  color: var(--muted);
  font-size: clamp(11px, 1.5vw, 13px);
  line-height: 1.35;
}
#fsCalibrate .fs-cal-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
#fsCalibrate .field span {
  font-size: clamp(11px, 1.4vw, 13px);
}
#fsCalibrate input[type="number"] {
  width: min(100%, 9rem);
  max-width: 100%;
  box-sizing: border-box;
}

#remoteOverlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  background: #0b1220;
  color: #f8fafc;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px;
}
body.remote-message #remoteOverlay { display: flex; }
#remoteOverlay .queue {
  font-size: clamp(48px, 12vw, 140px);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 16px;
}
#remoteOverlay .queue.heard-optotype {
  position: relative;
  font-family: "OpticianSans", "Optician Sans", sans-serif;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
}
#remoteOverlay .queue.heard-optotype::after {
  content: attr(data-acuity);
  display: block;
  margin-top: 14px;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  color: #94a3b8;
  white-space: nowrap;
}
#remoteOverlay .msg {
  font-size: clamp(20px, 3.5vw, 40px);
  line-height: 1.35;
  max-width: 28ch;
  margin: 0 auto;
  opacity: 0.95;
  white-space: pre-line;
}
#remoteOverlay .remote-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.letter-pad {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: min(920px, 94vw);
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(11, 18, 32, 0.88);
  backdrop-filter: blur(8px);
}
.letter-pad[hidden] { display: none !important; }
.letter-pad .letter-prompt {
  flex: 1 0 100%;
  text-align: center;
  color: #e2e8f0;
  font-size: 15px;
  margin-bottom: 4px;
}
.letter-pad button {
  min-width: 52px;
  min-height: 52px;
  border: 0;
  border-radius: 12px;
  background: #f8fafc;
  color: #0f172a;
  font-size: 26px;
  font-weight: 700;
  font-family: "Optician Sans", "Sloan", sans-serif;
  cursor: pointer;
}
.letter-pad button:hover { background: #cbd5e1; }
.letter-pad button:active { transform: scale(0.96); }
.letter-pad button.letter-skip {
  flex: 1 1 100%;
  min-height: 44px;
  font-size: 16px;
  font-family: inherit;
  background: transparent;
  color: #e2e8f0;
  border: 1px solid rgba(226, 232, 240, 0.45);
}
.letter-pad button.letter-skip:hover { background: rgba(248, 250, 252, 0.12); }
.letter-skip-fab {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 90;
  min-width: 140px;
  min-height: 48px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid rgba(226, 232, 240, 0.55);
  background: rgba(15, 23, 42, 0.82);
  color: #f8fafc;
  font-size: 16px;
  font-family: inherit;
  cursor: pointer;
  backdrop-filter: blur(6px);
}
.letter-skip-fab[hidden] { display: none !important; }
.letter-skip-fab:hover { background: rgba(30, 41, 59, 0.95); }
#remoteOverlay .remote-actions .btn.skip-btn,
#remoteOverlay .remote-actions .btn.ghost {
  background: transparent;
  color: #e2e8f0;
  border: 1px solid rgba(226, 232, 240, 0.45);
  box-shadow: none;
}

#remoteOverlay .register-name-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  justify-content: center;
  width: min(520px, calc(100vw - 64px));
}

#remoteOverlay .register-name-wrap input {
  width: 100%;
  max-width: 520px;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.96);
  color: var(--ink);
  font-size: 1.1rem;
}
#remoteOverlay .remote-actions .btn {
  min-width: 160px;
  font-size: 1.1rem;
  padding: 14px 22px;
}
body.remote-results #remoteOverlay .msg {
  max-width: 36ch;
}
.patient-art {
  margin: 18px auto 0;
  max-width: min(420px, 70vw);
}
.patient-art img {
  width: 100%;
  height: auto;
  display: block;
}
.patient-panels {
  display: grid;
  gap: 12px;
  margin: 22px auto 0;
  max-width: min(720px, 88vw);
  text-align: left;
}
.patient-panel {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.12);
  border: 1px solid rgba(248, 250, 252, 0.18);
}
.patient-panel strong {
  display: block;
  font-size: clamp(18px, 2.2vw, 24px);
  margin-bottom: 4px;
}
.patient-panel span {
  opacity: 0.9;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.35;
}
.countdown-num {
  margin-top: 12px;
  font-size: clamp(96px, 18vw, 180px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #f8fafc;
}
.audio-unlock {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-content: center;
  gap: 14px;
  background: rgba(15, 23, 42, 0.72);
  color: #fff;
  text-align: center;
  padding: 24px;
}
.audio-unlock[hidden] { display: none !important; }
.audio-unlock p {
  margin: 0;
  font-size: 18px;
  opacity: 0.92;
}
body.patient-flow #remoteOverlay {
  background: #0b1220;
}
#acStatus {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 60;
  font-size: 12px;
  color: var(--muted);
  background: rgba(255,255,255,.85);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
}
body.exam-mode #acStatus { display: none; }

@media (max-width: 1160px) {
  .layout { grid-template-columns: 1fr; }
  .panel { grid-template-rows: auto auto auto; }
  .panel-body { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
  .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .stat.wide { grid-column: span 2; }
}
@media (max-width: 760px) {
  .app { padding: 14px; }
  .header { align-items: flex-start; flex-direction: column; }
  .header-actions { width: 100%; justify-content: stretch; }
  .header-actions .btn { flex: 1 1 auto; }
  .panel-body { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat.wide { grid-column: 1 / -1; }
  .chart-area { padding: 24px 16px; }
  .exam-card { border-radius: 22px; }
  .line-label { font-size: 12px; }
  .chart-footer { flex-direction: column; align-items: flex-start; }
}