:root {
  --bg: #0f172a; /* slate-900 */
  --fg: #e2e8f0; /* slate-200 */
  --muted: #94a3b8; /* slate-400 */
  --accent: #22d3ee; /* cyan-400 */
  --accent-2: #818cf8; /* indigo-400 */
  --danger: #fb7185; /* rose-400 */
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--fg);
  background: radial-gradient(1200px 800px at 70% -10%, #1f2937 0%, var(--bg) 60%);
}

.screen {
  min-height: 100dvh;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 32px;
  display: flex;
  flex-direction: column;
}

h1, h2 {
  margin: 8px 0 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.hidden {
  display: none !important;
}

/* Home */
form#config-form {
  display: grid;
  gap: 16px;
  margin-top: 8px;
}

.field-row label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.inputs-inline {
  display: flex;
  align-items: center;
  gap: 8px;
}

.inputs-inline input[type="number"] {
  width: 110px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #334155;
  color: var(--fg);
  background: #0b1220;
}

.inputs-inline .sep {
  color: var(--muted);
}

.hint {
  display: block;
  color: var(--muted);
  margin-top: 6px;
}

.form-error {
  color: var(--danger);
  margin-top: 6px;
  min-height: 1.2em;
}

.note {
  margin-top: 12px;
  color: var(--muted);
}

.primary, .ghost, .option {
  font-weight: 600;
  border-radius: 12px;
  padding: 12px 16px;
  border: 1px solid transparent;
  cursor: pointer;
}

.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #001019;
}

.ghost {
  color: var(--fg);
  background: transparent;
  border-color: #334155;
}

/* Trainer */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.deal-area {
  flex: 1;
  display: grid;
  place-items: center;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.card-img {
  width: min(80vw, 420px);
  height: auto;
  filter: drop-shadow(0 24px 40px rgba(0,0,0,0.45));
}

.quiz-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(2,6,23,0.72);
  backdrop-filter: blur(6px);
}

.quiz-card {
  width: min(92vw, 560px);
  background: #0b1220;
  border: 1px solid #1f2a44;
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

.options {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.guess-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 24px;
}

.adjust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.adjust-btn {
  background: #0f172a;
  border: 1px solid #334155;
  color: var(--fg);
  padding: 12px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.feedback {
  min-height: 1.2em;
  margin-top: 10px;
  color: var(--muted);
}

@media (min-width: 768px) {
  .card-img {
    width: min(40vw, 420px);
  }
}

/* Improve touch targets on mobile */
@media (max-width: 480px) {
  .primary, .ghost, .option, .adjust-btn, button {
    padding: 16px 18px;
    min-height: 48px;
    min-width: 48px;
    font-size: 18px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* Make quiz action buttons easier to tap */
  .quiz-card > button {
    display: block;
    width: 100%;
  }

  /* Slightly larger gaps for easier separation */
  .options {
    gap: 14px;
  }
  .adjust-grid {
    gap: 12px;
  }
}