:root {
  --brand: #0b132b;
  --accent: #00bfa6;
  --ink: #101828;
  --muted: #667085;
  --line: #d8dee8;
  --soft: #f5f7fb;
  --soft-2: #eef3f8;
  --surface: #ffffff;
  --danger: #b42318;
  --ok: #067647;
  --shadow: 0 18px 44px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  font-family: Arial, Helvetica, sans-serif;
  letter-spacing: 0;
  overflow-x: hidden;
}

button, input, textarea, select { font: inherit; }

button {
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  background: #e9eef7;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}

button.primary, .primary { background: var(--brand); color: #fff; }
button.secondary { background: #e9eef7; }
button.danger { background: var(--danger); color: #fff; }
button.full { width: 100%; }
.button-link {
  align-items: center;
  background: #e9eef7;
  border-radius: 6px;
  color: var(--ink);
  display: inline-flex;
  min-height: 38px;
  padding: 0 14px;
  text-decoration: none;
}

.loading { min-height: 100vh; display: grid; place-items: center; }

.topbar {
  align-items: center;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  align-items: baseline;
  background: transparent;
  display: inline-flex;
  gap: 6px;
  font-weight: 800;
  padding-left: 0;
}

.brand-mark { color: var(--brand); font-size: 22px; letter-spacing: 0; }
.brand-product { color: var(--accent); font-size: 17px; }
.brand-line {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  margin: 0 0 12px;
}
.brand-line span { color: var(--brand); font-size: 18px; }
.topbar nav { display: flex; gap: 8px; }

.hero {
  align-items: center;
  display: grid;
  gap: 42px;
  grid-template-columns: 1.1fr 0.9fr;
  min-height: calc(100vh - 68px);
  padding: 44px min(6vw, 72px);
}

.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.04;
  margin: 8px 0 18px;
  max-width: 900px;
}

.hero p {
  color: var(--muted);
  font-size: 20px;
  line-height: 1.45;
  max-width: 720px;
}

.eyebrow {
  color: #006b5d;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.actions.compact { margin: 0; }
.actions.stack { flex-direction: column; }
.actions.wrap { align-items: center; }

.hero-panel {
  background: linear-gradient(180deg, #0b132b 0%, #111d3a 100%);
  border-radius: 8px;
  color: #fff;
  padding: 24px;
  min-height: 360px;
  display: grid;
  gap: 18px;
  align-content: center;
  box-shadow: var(--shadow);
}

.screen-title { color: #c8d2e3; font-weight: 800; }

.bar {
  background: rgba(255,255,255,0.12);
  border-radius: 6px;
  height: 46px;
  overflow: hidden;
  position: relative;
}

.bar span {
  background: var(--accent);
  display: block;
  height: 100%;
}

.bar strong {
  position: absolute;
  right: 14px;
  top: 12px;
}

.code-tile {
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  padding: 18px;
}

.code-tile b {
  display: block;
  font-size: 42px;
  margin-top: 6px;
}

.features {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 min(6vw, 72px) 60px;
}

.features article, .panel, .auth-panel, .participant-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 10px 24px rgba(16, 24, 40, 0.04);
}

.features h3, .panel h2 { margin-top: 0; }
.features p, .muted, .empty p, .row-card p { color: var(--muted); }
.small { font-size: 13px; }

.auth-screen {
  display: grid;
  min-height: calc(100vh - 68px);
  place-items: center;
  padding: 24px;
}

.auth-panel { width: min(460px, 100%); }

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 800;
  margin: 14px 0;
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  min-height: 44px;
  padding: 9px 10px;
  background: #fff;
}

.flash {
  min-height: 20px;
  color: var(--ok);
  font-size: 13px;
  margin: 10px 0;
}

.flash.bad { color: var(--danger); }

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--brand);
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
}

.sidebar button {
  color: #fff;
  background: rgba(255,255,255,0.08);
  text-align: left;
}

.sidebar .brand {
  font-size: 22px;
  margin-bottom: 18px;
}

.sidebar .brand-mark { color: #fff; }
.sidebar .brand-product { color: var(--accent); }

.workspace {
  padding: 24px;
}

.powered {
  color: var(--muted);
  font-size: 12px;
  margin: 24px 0 0;
  text-align: right;
}

.workspace-head, .panel-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.workspace-head h1 { margin: 0; }

.stats {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 16px;
}

.stats article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.stats b {
  display: block;
  font-size: 34px;
}

.stats span { color: var(--muted); }

.split {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr 1fr;
}

.row-card {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.empty {
  background: var(--soft);
  border-radius: 8px;
  padding: 18px;
}

.builder {
  display: grid;
  gap: 16px;
}

.question-editor {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.question-top {
  align-items: center;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 240px auto;
}

.mini-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, 1fr);
}

.option-row {
  align-items: center;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 120px 42px;
  margin: 8px 0;
}

.check {
  align-items: center;
  display: flex;
  gap: 7px;
  margin: 0;
}

.check input {
  min-height: 0;
  width: auto;
}

.question-visibility {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}

.sticky-actions {
  background: var(--soft);
  bottom: 0;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 14px 0;
  position: sticky;
}

.control-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 320px 1fr;
}

.big-code {
  font-size: 56px;
  font-weight: 900;
  letter-spacing: 0;
}

.qr {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  width: 220px;
}

.live-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 16px;
}

.live-metrics span, .badge {
  background: var(--soft);
  border-radius: 6px;
  color: var(--muted);
  font-size: 13px;
  padding: 7px 9px;
}

.visibility-list {
  display: grid;
  gap: 10px;
}

.visibility-row {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 12px 0;
}

.visibility-row p {
  color: var(--muted);
  margin: 4px 0 0;
}

.muted-row {
  opacity: 0.72;
}

.result-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.result-row {
  background: var(--soft);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.result-row div {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 44px;
  padding: 0 12px;
  position: relative;
  z-index: 1;
}

.result-row em {
  color: var(--muted);
  display: block;
  font-size: 12px;
  font-style: normal;
  padding: 0 12px 10px;
  position: relative;
  z-index: 1;
}

.result-row i {
  background: #c9f4ea;
  bottom: 0;
  display: block;
  left: 0;
  position: absolute;
  top: 0;
}

.result-row.correct { outline: 2px solid var(--accent); }

.narrative-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.narrative-list p {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  margin: 0;
  padding: 14px;
}

.display .narrative-list p {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
  color: #fff;
  font-size: 24px;
}

.report-question {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.participant {
  background:
    radial-gradient(circle at top left, rgba(0, 191, 166, 0.10), transparent 34%),
    linear-gradient(180deg, #f8fafc 0%, #eef3f8 100%);
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  place-items: center;
  padding: 18px;
}

.participant-card {
  box-shadow: var(--shadow);
  width: min(560px, 100%);
}

.participant-card h1 {
  font-size: clamp(26px, 7vw, 40px);
  line-height: 1.12;
}

.participant-card h2 {
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.18;
}

.answer-list {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.answer-list label {
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  gap: 10px;
  margin: 0;
  min-height: 58px;
  padding: 16px;
  touch-action: manipulation;
}

.answer-list span {
  display: block;
  font-size: 17px;
  line-height: 1.35;
}

.answer-list input { width: auto; min-height: 0; }
.waiting { text-align: center; padding: 24px 0; }

.display {
  background: #f7f9fc;
  color: var(--ink);
  min-height: 100vh;
  padding: 42px;
}

.display .eyebrow { color: #006b5d; }
.display h1 { color: var(--brand); font-size: 46px; margin: 0 0 28px; }

.display-top {
  align-items: flex-start;
  display: flex;
  gap: 18px;
  justify-content: space-between;
}

.display-fullscreen {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--brand);
  flex: 0 0 auto;
}

.display-join {
  align-items: center;
  display: grid;
  gap: 34px;
  grid-template-columns: 300px 1fr;
}

.display-qr {
  background: #fff;
  border-radius: 8px;
  padding: 12px;
  width: 300px;
  box-shadow: var(--shadow);
}

.display-join h2 {
  font-size: 36px;
  margin: 0 0 16px;
}

.display-question h2 {
  font-size: clamp(34px, 5vw, 72px);
  line-height: 1.05;
}

.display-meta {
  display: flex;
  gap: 10px;
}

.display-meta span {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  padding: 8px 12px;
}

.display .result-row {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.display .result-row i { background: #c9f4ea; }
.display .result-row em { color: var(--muted); font-size: 15px; }

.summary-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 22px 0;
}

.summary-grid div {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.summary-grid strong {
  color: var(--brand);
  display: block;
  font-size: 44px;
}

.summary-grid span {
  color: var(--muted);
}

.summary-question {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.display .waiting {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  margin-top: 24px;
}

.display-powered {
  bottom: 18px;
  color: var(--muted);
  font-size: 12px;
  position: fixed;
  right: 24px;
}

.display .narrative-list p {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

@media (max-width: 860px) {
  .topbar { padding: 0 14px; }
  .topbar nav { gap: 6px; }
  .hero, .features, .split, .layout, .control-grid, .display-join {
    grid-template-columns: 1fr;
  }
  .hero { min-height: auto; padding: 28px 16px; }
  .features { padding: 0 16px 32px; }
  .layout { display: block; }
  .sidebar {
    flex-direction: row;
    overflow-x: auto;
    position: sticky;
    top: 0;
    z-index: 4;
  }
  .sidebar .brand { margin: 0; min-width: 130px; }
  .workspace { padding: 16px; }
  .stats { grid-template-columns: 1fr; }
  .workspace-head, .panel-head, .row-card {
    align-items: stretch;
    flex-direction: column;
  }
  .question-top, .option-row, .mini-grid {
    grid-template-columns: 1fr;
  }
  .display { padding: 22px; }
  .display h1 { font-size: 32px; }
  .display-top { flex-direction: column; }
  .display-qr { width: min(280px, 100%); }
  .summary-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .auth-screen,
  .participant {
    align-items: stretch;
    padding: 12px;
  }

  .participant-card,
  .auth-panel {
    border-radius: 8px;
    min-height: calc(100svh - 24px);
    padding: 18px;
  }

  button,
  .button-link {
    min-height: 48px;
  }

  input,
  textarea,
  select {
    font-size: 16px;
    min-height: 48px;
  }

  .answer-list {
    gap: 12px;
  }

  .answer-list label {
    min-height: 64px;
    padding: 18px 16px;
  }
}