:root {
  color-scheme: light;
  --ink: #172235;
  --muted: #627087;
  --line: #dce3ec;
  --surface: #ffffff;
  --canvas: #f3f6fa;
  --accent: #3157d5;
  --accent-dark: #243fa0;
  --success: #157a55;
  --danger: #c23b3b;
  --warning: #9a6a00;
  --shadow: 0 18px 48px rgba(25, 42, 78, .09);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(49, 87, 213, .09), transparent 32rem),
    var(--canvas);
  -webkit-text-size-adjust: 100%;
}

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

.app-shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 72px; }

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 10px; font-size: clamp(2.2rem, 5vw, 4.1rem); line-height: .98; letter-spacing: -.05em; }
h2 { margin-bottom: 10px; font-size: 1.65rem; letter-spacing: -.025em; }
h3 { margin-bottom: 10px; font-size: 1rem; }
.subtitle { max-width: 700px; margin-bottom: 0; color: var(--muted); font-size: 1.05rem; line-height: 1.55; }
.eyebrow { margin-bottom: 10px; color: var(--accent); font-size: .76rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.muted { color: var(--muted); line-height: 1.55; }

.session-badge {
  min-width: 110px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.7);
  text-align: center;
}
.session-badge span { display: block; color: var(--muted); font-size: .76rem; }
.session-badge strong { font-size: 1.4rem; white-space: nowrap; }

.panel {
  margin-bottom: 22px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid rgba(216, 224, 235, .9);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.participant-panel { max-width: 620px; margin-left: auto; margin-right: auto; }
.participant-panel label { margin: 24px 0 8px; }
.participant-panel .primary { margin-top: 14px; }
.field-error { margin: 6px 0 0; color: var(--danger); font-size: .86rem; font-weight: 700; }
.participant-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.participant-summary span { display: block; margin-bottom: 3px; color: var(--muted); font-size: .76rem; }
.participant-summary strong { font-size: 1.05rem; }

.setup-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(250px, .75fr); gap: 42px; }
label { display: grid; gap: 8px; color: #344157; font-size: .88rem; font-weight: 700; }
input[type="text"] {
  width: 100%;
  min-height: 46px;
  padding: 0 13px;
  border: 1px solid #cfd8e5;
  border-radius: 10px;
  outline: none;
  color: var(--ink);
  background: #fff;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(49,87,213,.12); }
button:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.condition-label { color: var(--muted); font-weight: 700; line-height: 1.5; }
.session-actions { display: flex; justify-content: flex-end; margin-bottom: 14px; }
.pictogram svg, #palette-body svg { max-width: 100%; height: auto; flex-shrink: 1; display: inline-block; vertical-align: middle; }
.block-plan { padding-left: 22px; line-height: 1.8; }
.palette-details { margin: 20px 0; }
.palette-details summary { cursor: pointer; font-weight: 700; }
.palette-details p { margin-top: 12px; color: var(--muted); line-height: 1.5; }
#countdown-number { font-size: 7rem; line-height: 1.2; font-variant-numeric: tabular-nums; color: var(--accent); font-weight: 800; }
.score-grid { display: flex; gap: 40px; margin: 12px 0 28px; }
.score-grid span { display: block; color: var(--muted); }
.score-grid strong { display: block; font-size: 2.4rem; }
#complete-screen .button-row { margin-top: 24px; }

.protocol-card { padding: 24px; border-radius: 18px; background: #f0f4ff; }
.protocol-card ol { margin: 0 0 18px; padding-left: 20px; color: #40506a; line-height: 1.55; }
.protocol-card li + li { margin-top: 8px; }
.protocol-card p { margin: 0; color: var(--muted); font-size: .87rem; line-height: 1.55; }

button { min-height: 44px; padding: 0 18px; border-radius: 10px; border: 1px solid transparent; font-weight: 750; }
button:disabled { cursor: not-allowed; opacity: .45; }
.primary { color: #fff; background: var(--accent); }
.primary:hover:not(:disabled) { background: var(--accent-dark); }
.secondary { border-color: #c8d2e2; color: #2e3d55; background: #fff; }
.secondary:hover:not(:disabled) { background: #f2f5fa; }
.ghost { color: var(--muted); background: transparent; }
.ghost:hover:not(:disabled) { color: var(--danger); background: #fff3f3; }

.hidden { display: none !important; }
.center-stage { min-height: 430px; display: grid; justify-items: center; align-content: center; text-align: center; }
.stimulus-items { display: flex; flex-wrap: wrap; max-width: 500px; justify-content: center; gap: 10px; margin: 12px auto 24px; }
.digit-card {
  width: 144px;
  max-width: 100%;
  min-height: 84px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #f9fbfe;
  font-family: Arial, sans-serif;
  color: var(--ink);
  font-style: normal;
  font-size: 2rem;
  font-weight: 750;
  line-height: 1.05;
}
.digit-card.pictogram { font-size: 15px; letter-spacing: 0; white-space: nowrap; }
.timer-track { width: min(480px, 80vw); height: 6px; border-radius: 99px; background: #e4e9f2; overflow: hidden; }
.timer-bar { height: 100%; background: var(--accent); transform-origin: left; }
.timer-bar.running { animation: countdown linear forwards; }
@keyframes countdown { to { transform: scaleX(0); } }

.section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 24px; }
.selection-counter { padding: 8px 12px; border-radius: 99px; color: var(--accent); background: #eef2ff; font-size: .82rem; font-weight: 800; white-space: nowrap; }
.answer-options { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; margin-bottom: 24px; }
.answer-option { min-height: 76px; padding: 10px; border: 1px solid var(--line); background: #fff; }
.answer-option:hover { border-color: #9aabe1; background: #f7f9ff; }
.answer-option.selected { border-color: var(--accent); box-shadow: inset 0 0 0 2px var(--accent); background: #edf1ff; }

.result-status { margin-bottom: 28px; font-size: 1.25rem; font-weight: 800; }
.result-status.success { color: var(--success); }
.result-status.has-errors { color: var(--danger); }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compact-set { min-height: 52px; display: flex; flex-wrap: wrap; gap: 8px; }
.compact-set .digit-card { width: 130px; min-height: 48px; padding: 8px; border-radius: 10px; font-size: 1.15rem; }
.compact-set .pictogram { font-size: 14px; }
.error-details { margin: 22px 0; color: var(--muted); line-height: 1.6; }
.error-details strong { color: var(--ink); }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; }
.button-row.compact button { min-height: 38px; padding: 0 13px; font-size: .83rem; }

.history-panel { box-shadow: none; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 13px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: .88rem; }
th { color: var(--muted); font-size: .75rem; letter-spacing: .04em; text-transform: uppercase; }
td:nth-child(n+4), th:nth-child(n+4) { text-align: center; }
.empty-row td { padding: 28px; color: var(--muted); text-align: center !important; }

.hero-aside { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
.link-button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 10px; border: 1px solid #c8d2e2;
  color: var(--accent); background: #fff; text-decoration: none; font-weight: 750;
}
.link-button:hover { background: #f2f5fa; }

.upload-status { margin: 10px 0 18px; }
.tone-success, .result-status.success { color: var(--success); }
.tone-warn { color: var(--warning); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; }
.stat {
  padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px; background: #f9fbfe;
}
.stat span { display: block; color: var(--muted); font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 6px; }
.stat strong { font-size: 1.8rem; letter-spacing: -.02em; }

.chart-panel h2 { margin-bottom: 6px; }
.chart-panel .muted { margin-bottom: 16px; }
.chart-wrap { position: relative; width: 100%; height: clamp(260px, 42vw, 420px); }

@media (max-width: 900px) {
  .answer-options { grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); }
}

@media (max-width: 760px) {
  .app-shell { width: min(100% - 20px, 1120px); padding: 20px 0 56px; }
  .hero { flex-direction: column; align-items: flex-start; gap: 16px; margin-bottom: 20px; }
  .hero-aside { width: 100%; justify-content: space-between; gap: 10px; }
  .session-badge { min-width: 84px; padding: 10px 14px; }
  .session-badge strong { font-size: 1.15rem; }
  .session-badge span { font-size: .72rem; }

  h1 { font-size: clamp(1.75rem, 7vw, 2.4rem); margin-bottom: 6px; }
  h2 { font-size: 1.3rem; }
  .subtitle { font-size: .98rem; }

  .panel { margin-bottom: 16px; padding: 18px; border-radius: 20px; }
  .setup-grid, .result-grid { grid-template-columns: 1fr; gap: 22px; }
  .section-head { flex-direction: column; }
  .participant-summary { align-items: flex-start; }

  .button-row { gap: 8px; }
  .button-row > .primary,
  .button-row > .secondary,
  .button-row > .link-button { flex: 1 1 140px; }

  .center-stage { min-height: 320px; }
  #countdown-number { font-size: 5rem; }

  .stimulus-items { max-width: 100%; gap: 8px; }
  .stimulus-items .digit-card { width: 108px; min-height: 72px; font-size: 1.5rem; padding: 6px; }
  .stimulus-items .pictogram { font-size: 12px; }

  .answer-options { grid-template-columns: repeat(auto-fit, minmax(84px, 1fr)); gap: 8px; }
  .answer-option { min-height: 68px; padding: 8px; }
  .answer-option .pictogram { font-size: 12px; }

  .score-grid { gap: 22px; }
  .score-grid strong { font-size: 1.8rem; }
  .compact-set .digit-card { width: 108px; min-height: 44px; font-size: 1rem; }
  .compact-set .pictogram { font-size: 12px; }

  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .stat { padding: 12px 14px; }
  .stat strong { font-size: 1.3rem; }
  .chart-wrap { height: 280px; }
  .chart-panel .muted { font-size: .9rem; }

  th, td { padding: 10px 8px; font-size: .82rem; }
}

@media (max-width: 420px) {
  .app-shell { width: min(100% - 16px, 1120px); padding: 16px 0 48px; }
  .panel { padding: 14px; border-radius: 18px; }
  h1 { font-size: 1.6rem; letter-spacing: -.03em; }
  h2 { font-size: 1.15rem; }

  button, .link-button { padding: 0 14px; font-size: .95rem; }
  .link-button { min-height: 40px; padding: 0 12px; font-size: .88rem; }

  .center-stage { min-height: 280px; }
  #countdown-number { font-size: 4.2rem; }

  .stimulus-items { gap: 6px; }
  .stimulus-items .digit-card { width: 92px; min-height: 64px; font-size: 1.3rem; padding: 4px; }
  .stimulus-items .pictogram { font-size: 10px; }

  .answer-options { grid-template-columns: repeat(auto-fit, minmax(74px, 1fr)); gap: 6px; }
  .answer-option { min-height: 60px; padding: 4px; }
  .answer-option .digit-card { font-size: 1.3rem; }
  .answer-option .pictogram { font-size: 10px; }

  .compact-set { gap: 6px; }
  .compact-set .digit-card { width: calc(50% - 3px); min-height: 42px; font-size: .95rem; }
  .compact-set .pictogram { font-size: 11px; }

  .score-grid { gap: 18px; }
  .score-grid strong { font-size: 1.5rem; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 10px 12px; }
  .stat strong { font-size: 1.15rem; }
  .stat span { font-size: .68rem; }
  .chart-wrap { height: 240px; }
  th, td { padding: 8px 6px; font-size: .76rem; }
}