:root {
  --bg: #f3efe6;
  --card: #fffdf8;
  --line: #d8cfbe;
  --text: #1f2933;
  --accent: #0d5c63;
  --accent-dark: #08444a;
  --danger: #a62c2b;
  --muted: #5b6870;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(13, 92, 99, 0.12), transparent 30%),
    linear-gradient(180deg, #f8f5ec 0%, var(--bg) 100%);
}

.container {
  width: min(1100px, calc(100vw - 2rem));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(10px);
}

.site-header .container,
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.site-header .container {
  padding: 1rem 0;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--accent);
}

nav a {
  margin-left: 1rem;
  color: var(--text);
  text-decoration: none;
}

main.container {
  padding: 2rem 0 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.5rem;
  box-shadow: 0 12px 30px rgba(31, 41, 51, 0.06);
  margin-bottom: 1.5rem;
}

.narrow {
  max-width: 480px;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

.form-span {
  grid-column: 1 / -1;
}

.weekday-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.75rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
}

.optional-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: #8a949b;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
  font: inherit;
  background: white;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.8rem 1.2rem;
  font: inherit;
  font-weight: 700;
  color: white;
  background: var(--accent);
  cursor: pointer;
}

button.secondary {
  background: #6d7a81;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error {
  color: var(--danger);
  font-weight: 700;
}

.error-text {
  color: var(--danger);
}

.ok {
  color: var(--accent);
}

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

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 1rem;
}

.remaining-box {
  padding: 0.85rem 1rem;
  border-radius: 14px;
  background: #edf5f6;
  border: 1px solid #c2dde0;
}

.ra-list {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 1.25rem;
}

.ra-row {
  display: grid;
  grid-template-columns: 48px 90px 1fr 160px;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.ra-row.dragging {
  opacity: 0.55;
}

.drag-handle {
  text-align: center;
  font-weight: 700;
  color: var(--muted);
  cursor: move;
}

.ra-key {
  font-weight: 700;
}

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

th, td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

@media (max-width: 900px) {
  .two-column,
  .summary-grid,
  .weekday-grid,
  .ra-row {
    grid-template-columns: 1fr;
  }
}