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

:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1a1f2e;
  --text-muted: #5c6578;
  --border: #e2e6ed;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --summary-bg: #f8fafc;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.header {
  margin-bottom: 1.5rem;
  text-align: center;
}

.header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 1.25rem;
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.card + .card {
  margin-top: 1.25rem;
}

.card-title {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
}

.value-readout {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  cursor: pointer;
}

input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
  cursor: pointer;
}

input[type="number"] {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text);
  background: var(--card);
}

input[type="number"]:focus,
input[type="range"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input[type="range"] {
  width: 100%;
  height: 6px;
  accent-color: var(--accent);
  cursor: pointer;
}

.hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.schematic-card {
  min-height: 900px;
}

.schematic {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.view-slot {
  min-height: 280px;
  height: 280px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: #fbfdff;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-slot svg {
  display: block;
  width: 100%;
  height: 100%;
}

.schematic-legend {
  margin-top: 0.75rem;
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 0;
  padding: 1rem;
  background: var(--summary-bg);
  border-radius: 8px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.summary dt {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.summary dd {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.summary-item.highlight dd {
  color: #059669;
}

.warning-banner,
.error-banner {
  margin-top: 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
}

.warning-banner {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  color: #92400e;
}

.error-banner {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.warning-banner.hidden,
.error-banner.hidden {
  display: none;
}

.disclaimer {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--summary-bg);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.schedule-table-wrap {
  overflow-x: auto;
}

table.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

table.schedule-table th,
table.schedule-table td {
  padding: 0.5rem 0.6rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
}

table.schedule-table .ribbon-index {
  font-weight: 700;
  color: var(--accent);
}

table.schedule-table th:first-child,
table.schedule-table td:first-child,
table.schedule-table th:nth-child(2),
table.schedule-table td:nth-child(2) {
  text-align: left;
}

table.schedule-table th {
  font-weight: 600;
  color: var(--text-muted);
  background: var(--summary-bg);
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 1.25rem 1rem 2rem;
  }

  .header h1 {
    font-size: 1.5rem;
  }

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