:root {
  --bg: #faf5f7;
  --card-bg: #ffffff;
  --primary: #c2185b;
  --primary-hover: #ad1457;
  --primary-light: #fce4ec;
  --text: #333333;
  --text-muted: #777777;
  --border: #e0d6d9;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.8rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 500;
}

.tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
  color: var(--primary);
}

/* Form */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group > label:first-child {
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

select, input[type="number"] {
  padding: 0.55rem 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fff;
  color: var(--text);
  transition: border-color 0.2s;
}

select:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
}

.range-inputs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.range-inputs input {
  flex: 1;
  min-width: 0;
}

.range-sep {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Checkboxes */
.checkbox-row, .checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem 0.75rem;
}

.checkbox-label {
  font-size: 0.9rem;
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
}

/* Dual-range slider */
.slider-container {
  padding: 0.25rem 0;
}

.slider-track {
  position: relative;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin: 12px 0 8px;
}

.slider-range {
  position: absolute;
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  pointer-events: none;
}

.slider-thumb {
  position: absolute;
  top: -10px;
  left: 0;
  width: 100%;
  height: 26px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  pointer-events: none;
  margin: 0;
  padding: 0;
}

.slider-thumb::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  cursor: pointer;
  pointer-events: auto;
}

.slider-thumb::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  cursor: pointer;
  pointer-events: auto;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}

/* Calculate Button */
.calculate-btn {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.85rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #e91e63);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.calculate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(194, 24, 91, 0.35);
}

.calculate-btn:active {
  transform: translateY(0);
}

/* Results */
.results-card {
  animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-hero {
  text-align: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.result-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.result-context {
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-size: 0.95rem;
}

.result-odds {
  text-align: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.result-odds p {
  font-size: 1.05rem;
  margin: 0.25rem 0;
}

.result-odds p:first-child {
  font-weight: 600;
}

.result-message {
  text-align: center;
  font-size: 1.1rem;
  padding: 1rem;
  background: var(--primary-light);
  border-radius: 8px;
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* Breakdown */
.breakdown {
  margin-top: 0.5rem;
}

.breakdown summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
  padding: 0.5rem 0;
}

.breakdown table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
}

.breakdown th, .breakdown td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.breakdown th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.breakdown td:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Footer */
footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding-top: 1rem;
  line-height: 1.5;
}

footer p + p {
  margin-top: 0.25rem;
}

/* Mobile */
@media (max-width: 600px) {
  .container {
    padding: 1.25rem 1rem;
  }

  header h1 {
    font-size: 2.2rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .checkbox-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card {
    padding: 1.25rem;
  }

  .result-number {
    font-size: 2rem;
  }
}