:root {
  --bg: #f7f7fb;
  --panel: #ffffff;
  --border: #e0e0ea;
  --text: #1f2430;
  --muted: #5c6475;
  --primary: #2d6cdf;
  --primary-hover: #2558b8;
  --positive: #1f9d5c;
  --negative: #d64545;
  --zero: #6b7280;
  --invalid: #f9e1e1;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

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

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

.container {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 0 1rem;
}

.app-header {
  background: #0f172a;
  color: white;
  padding: 1.5rem 0;
  box-shadow: var(--shadow);
}

.app-header h1 {
  margin: 0 0 0.25rem;
}

.subtitle {
  color: var(--muted);
  margin: 0.1rem 0 0;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 1.25rem 0;
  box-shadow: var(--shadow);
}

.panel-header {
  padding: 1.1rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.panel-body {
  padding: 1rem 1.25rem 1.25rem;
}

.panel-footer {
  padding: 0 1.25rem 1rem;
  color: var(--negative);
  min-height: 1.25rem;
}

.panel-header.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.95rem;
}

.field input,
.field select {
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fbfbfe;
  font-size: 0.95rem;
  color: var(--text);
}

.field input:focus {
  outline: 2px solid rgba(45, 108, 223, 0.25);
}

.hint {
  color: var(--muted);
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}

.btn.primary {
  background: var(--primary);
  color: white;
}

.btn.primary:hover {
  background: var(--primary-hover);
}

.btn.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn.small {
  padding: 0.4rem 0.6rem;
  font-size: 0.9rem;
}

.button-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pattern-card {
  border-top: 1px solid var(--border);
}

.pattern-card:first-child {
  border-top: none;
}

.pattern-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  gap: 1rem;
}

.pattern-name {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.pattern-name input {
  width: 220px;
  max-width: 100%;
}

.day-grid {
  width: 100%;
  border-collapse: collapse;
}

.day-grid th,
.day-grid td {
  padding: 0.55rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.day-grid th {
  background: #f1f3f8;
  font-weight: 600;
  font-size: 0.95rem;
}

.day-grid td input {
  width: 100%;
  min-width: 90px;
}

/* Prevent macOS browsers' native <input type="time"> UI from changing row height while editing */
.day-grid td input[type="time"],
.day-grid td input[type="number"] {
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.2;
  height: 2.25rem;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fbfbfe;
  color: var(--text);
}

.day-grid td input[type="time"]:focus,
.day-grid td input[type="number"]:focus {
  outline: 2px solid rgba(45, 108, 223, 0.25);
  outline-offset: 0;
}

.day-grid .hours-cell {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  text-align: right;
}

/* Keep the Hours column width stable so row height doesn't jump when values get wider */
.day-grid th:nth-child(5),
.day-grid td:nth-child(5) {
  width: 6.5rem;
}

.invalid-row {
  background: var(--invalid);
}

.summary-row {
  font-weight: 700;
  background: #f8fafc;
}

.gap-positive {
  color: var(--positive);
}

.gap-negative {
  color: var(--negative);
}

.gap-zero {
  color: var(--zero);
}

.table-wrapper {
  overflow-x: auto;
}

#comparison-table {
  width: 100%;
  border-collapse: collapse;
}

#comparison-table th,
#comparison-table td {
  padding: 0.65rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

#comparison-table tbody tr.highlight {
  background: #e7f0ff;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.85rem;
  background: #eef2ff;
  color: #3730a3;
}

.error-text {
  color: var(--negative);
  font-size: 0.9rem;
}

.toast-visible {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: #111827;
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  opacity: 0.95;
}

@media (max-width: 720px) {
  .panel-header.actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .pattern-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .day-grid th:nth-child(2),
  .day-grid td:nth-child(2) {
    width: 30%;
  }
}