/* ------------------------------------------------------------------
   Room Booking — stylesheet
   Organised top to bottom: variables, resets, layout, components.
   ------------------------------------------------------------------ */

:root {
  --color-bg: #DBD3D8;
  --color-surface: #b491bb;
  --color-border: #e1e4e8;
  --color-text: #071108;
  --color-muted: #353635;

  --color-primary: #643173;
  --color-primary-dark: #071108;

  --color-free: #ecfdf5;
  --color-free-border: #34d399;
  --color-booked: #fef2f2;
  --color-booked-border: #f87171;
  --color-mine: #eff6ff;
  --color-mine-border: #60a5fa;

  --color-success-bg: #ecfdf5;
  --color-success-text: #047857;
  --color-error-bg: #fef2f2;
  --color-error-text: #b91c1c;

  --radius: 8px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 0 0 12px; }

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

/* ---------- header ---------- */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  font-size: 1.05rem;
}

.logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  margin: 0;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }

.nav-link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.92rem;
}
.nav-link:hover { text-decoration: underline; }
.nav-link.active {
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
}

.nav-user { color: var(--color-muted); font-size: 0.88rem; }

main.container { padding-top: 24px; padding-bottom: 48px; }

.page-heading { margin-bottom: 16px; }

/* ---------- flash messages ---------- */

.flash-container { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }

.flash {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.92rem;
}
.flash-success { background: var(--color-success-bg); color: var(--color-success-text); }
.flash-error   { background: var(--color-error-bg);   color: var(--color-error-text); }

/* ---------- cards / forms ---------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.hero { padding: 32px; text-align: center; }
.hero h1 { margin-bottom: 10px; }
.hero .muted { max-width: 520px; margin: 0 auto 20px; }
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

code {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.85em;
}

.login-wrap { display: flex; justify-content: center; margin-top: 40px; }
.login-card { width: 100%; max-width: 360px; }
.login-card h1 { margin-bottom: 4px; }
.login-card .muted { margin-bottom: 18px; }
.center-text { text-align: center; margin-top: 14px; margin-bottom: 0; }

label { display: block; font-size: 0.85rem; font-weight: 600; margin: 12px 0 4px; }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-text);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.inline-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.inline-form input, .inline-form select { width: auto; flex: 1 1 160px; }

.btn {
  display: inline-block;
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-block { width: 100%; margin-top: 18px; }

.btn-small {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}
.btn-small:hover { background: var(--color-bg); }

.btn-danger { color: #b91c1c; border-color: #fca5a5; }
.btn-danger:hover { background: var(--color-error-bg); }

.btn-link {
  background: none;
  border: none;
  color: var(--color-muted);
  font-size: 0.75rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}
.btn-link:hover { color: var(--color-error-text); }

.btn-update-credits {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 240px;
}

.btn-update-credits:disabled {
  opacity: 0.8;
  cursor: wait;
}

.btn-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-update-credits.is-loading .btn-spinner {
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.badge {
  display: inline-block;
  background: #111827;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 4px;
  vertical-align: middle;
}

.tag {
  display: inline-block;
  font-size: 0.62rem;
  color: var(--color-muted);
  margin-left: 4px;
}

/* ---------- booking grid ---------- */

.week-range { color: var(--color-muted); margin-top: 0; margin-bottom: 16px; }

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

.booking-grid {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  min-width: 720px;
}

.booking-grid th, .booking-grid td {
  border: 1px solid var(--color-border);
  text-align: center;
  padding: 8px 6px;
  font-size: 0.85rem;
}

.booking-grid thead th {
  background: #fafbfc;
  font-weight: 600;
  padding: 10px 6px;
}

.date-sub { font-weight: 400; color: var(--color-muted); font-size: 0.75rem; }

.time-col, .time-col-head {
  white-space: nowrap;
  font-weight: 600;
  background: #fafbfc;
  color: var(--color-muted);
}

.today-col { background: #fffbeb; }

.slot-cell { min-width: 100px; vertical-align: middle; }

.slot-cell.free { background: var(--color-free); }
.slot-cell.booked { background: var(--color-booked); }
.slot-cell.mine { background: var(--color-mine); }

.btn-slot {
  width: 100%;
  padding: 6px 4px;
  border: 1px solid var(--color-free-border);
  background: #fff;
  color: #047857;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-slot:hover:not(:disabled) { background: var(--color-free); }
.btn-slot:disabled { opacity: 0.45; cursor: not-allowed; }

.slot-booked {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.slot-name { font-weight: 600; font-size: 0.8rem; }

.admin-book-form { display: flex; flex-direction: column; gap: 4px; }

.admin-book-form select { font-size: 0.75rem; padding: 4px; background: var(--colour-bg) }
.admin-book-form button { font-size: 0.75rem; padding: 4px; background: var(--colour-bg) }


/* ---------- legend ---------- */

.legend { display: flex; gap: 18px; margin-top: 14px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--color-muted); }
.swatch { width: 14px; height: 14px; border-radius: 4px; display: inline-block; }
.swatch.free { background: var(--color-free); border: 1px solid var(--color-free-border); }
.swatch.mine { background: var(--color-mine); border: 1px solid var(--color-mine-border); }
.swatch.booked { background: var(--color-booked); border: 1px solid var(--color-booked-border); }

.update-credits-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.update-credits-form {
  margin: 0;
}

.update-credits-text {
  margin: 0;
  line-height: 1.4;
  max-width: 420px;
}

.btn-update-credits {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 190px;
  min-height: 52px;
  padding: 10px 16px;
}

.btn-update-credits:disabled {
  opacity: 0.8;
  cursor: wait;
}

.btn-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-update-credits.is-loading .btn-spinner {
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- admin table ---------- */

.admin-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.admin-table th, .admin-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.88rem;
}
.admin-table thead th { color: var(--color-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  .header-inner { flex-direction: column; align-items: flex-start; height: auto; padding: 10px 0; gap: 6px; }
  nav { flex-wrap: wrap; gap: 10px; }
  .logo { margin: 0; margin-bottom: 6px; }
}