:root {
  --bg: #F7F5FF;
  --card-bg: #FFFFFF;
  --primary: #7C5CFC;
  --primary-hover: #6344E0;
  --primary-light: #EDE9FE;
  --text: #1C1917;
  --text-secondary: #78716C;
  --text-muted: #A8A29E;
  --border: #E7E5E4;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --yes: #34D399;
  --no: #F87171;
  --depends: #FBBF24;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#app {
  width: 100%;
  max-width: 520px;
  padding: 24px 16px;
}

/* Screens */
.screen { display: none; }
.screen.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Landing */
.logo { font-size: 48px; text-align: center; margin-bottom: 8px; }

h1 {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 32px;
}

/* Buttons */
.btn-primary {
  display: block;
  width: 100%;
  padding: 14px 24px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

/* Category badge */
.category-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  text-transform: capitalize;
  margin-bottom: 16px;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.card-label {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.card h2 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  text-align: left;
  margin-bottom: 0;
}

/* Context */
.context {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.context h3 {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.context p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Timer */
.timer {
  text-align: center;
  margin-bottom: 24px;
}
.timer p {
  font-size: 14px;
  color: var(--text-secondary);
}
.timer-bar {
  height: 3px;
  background: var(--primary-light);
  border-radius: 2px;
  margin-bottom: 12px;
  overflow: hidden;
  position: relative;
}
.timer-bar::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  background: var(--primary);
  border-radius: 2px;
  width: var(--progress, 0%);
  transition: width 1s linear;
}

/* Response form */
.response-form { margin-top: 0; }
.hidden { display: none !important; }

.form-group { margin-bottom: 24px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.direction-buttons { display: flex; gap: 8px; }
.dir-btn {
  flex: 1;
  padding: 12px 8px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.dir-icon { font-size: 20px; }
.dir-btn:hover { border-color: var(--primary); background: var(--primary-light); }
.dir-btn.selected[data-direction="yes"] { border-color: var(--yes); background: #ECFDF5; }
.dir-btn.selected[data-direction="no"] { border-color: var(--no); background: #FEF2F2; }
.dir-btn.selected[data-direction="depends"] { border-color: var(--depends); background: #FFFBEB; }

/* Slider */
.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}
.certainty-display {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 1px 8px;
  border-radius: 6px;
  font-weight: 700;
}

/* Result screen */
.check-icon { font-size: 36px; text-align: center; margin-bottom: 8px; }
.result-screen .card h2 { text-align: center; }

.bar-chart { margin-top: 16px; }
.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.bar-label {
  font-size: 14px;
  font-weight: 500;
  width: 80px;
  text-align: right;
}
.bar-track {
  flex: 1;
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.5s ease;
}
.bar-yes .bar-fill { background: var(--yes); }
.bar-no .bar-fill { background: var(--no); }
.bar-depends .bar-fill { background: var(--depends); }
.bar-pct {
  font-size: 14px;
  font-weight: 600;
  width: 40px;
}
.response-count {
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Empty screen */
.empty-icon { font-size: 48px; text-align: center; margin-bottom: 8px; }
#empty-screen .card h2 { text-align: center; }
#empty-screen .subtitle { margin-bottom: 0; }

/* Result card center */
#result-screen .card h2 { text-align: center; }
#result-screen h3 {
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-align: center;
  margin-top: 20px;
  margin-bottom: 4px;
}