/* ===== Room Booking — Design Tokens ===== */
:root {
  --primary: #0d6efd;
  --primary-600: #0b5ed7;
  --primary-50: #e7f1ff;
  --success: #198754;
  --success-50: #d1e7dd;
  --danger: #dc3545;
  --danger-50: #f8d7da;
  --warning: #ffc107;
  --warning-50: #fff3cd;
  --info: #0dcaf0;
  --info-50: #cff4fc;

  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #212529;
  --muted: #6c757d;
  --border: #dee2e6;
  --border-strong: #ced4da;
  --hover: #f8f9fa;

  --r-sm: 0.375rem;
  --r-md: 0.5rem;
  --r-lg: 0.75rem;

  --shadow-card: 0 1px 3px rgba(0,0,0,.05);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.08);
  --shadow-pop: 0 8px 24px rgba(13,17,38,.12);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
h1, h2, h3, h4, h5, h6, p { margin: 0; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

/* ===== Navbar ===== */
.navbar {
  height: 56px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar .brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 1.05rem; color: #fff;
}
.navbar .brand:hover { text-decoration: none; }
.navbar .brand .bi { font-size: 1.25rem; }
.navbar .nav-links {
  display: flex; align-items: center; gap: 4px;
  flex: 1;
}
.navbar .nav-link {
  color: rgba(255,255,255,.85);
  padding: 8px 14px;
  border-radius: var(--r-sm);
  font-size: .95rem;
  transition: background .15s, color .15s;
}
.navbar .nav-link:hover { background: rgba(255,255,255,.12); color:#fff; text-decoration: none; }
.navbar .nav-link.active { background: rgba(0,0,0,.18); color: #fff; }
.navbar .user-menu {
  position: relative;
  display: flex; align-items: center; gap: 10px;
  padding: 6px 12px; border-radius: var(--r-sm);
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: .9rem;
  border: 1px solid rgba(255,255,255,.12);
  cursor: pointer;
}
.navbar .user-menu .bi-person-circle { font-size: 1.35rem; }
.navbar .user-menu .role {
  background: #fff; color: var(--text);
  font-size: .7rem; font-weight: 600;
  padding: 2px 8px; border-radius: 999px;
  text-transform: lowercase;
}
.navbar .user-menu .role.admin { background: var(--danger); color: #fff; }
.navbar .user-menu .caret { opacity: .7; font-size: .7rem; }
.navbar .user-menu .dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
  min-width: 180px;
  padding: 6px;
  display: none;
  z-index: 200;
}
.navbar .user-menu:hover .dropdown { display: block; }
.navbar .user-menu .dropdown a {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  color: var(--text);
  border-radius: var(--r-sm);
  font-size: .9rem;
}
.navbar .user-menu .dropdown a:hover { background: var(--hover); text-decoration: none; }

/* ===== Container ===== */
.container {
  max-width: 1140px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}
.container.narrow { max-width: 520px; }
main { flex: 1; }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 16px;
  color: var(--muted);
  font-size: .875rem;
  background: #fff;
  border-top: 1px solid var(--border);
}

/* ===== Typography ===== */
.page-title { font-size: 2rem; font-weight: 600; line-height: 1.2; display: inline-flex; align-items: center; gap: 10px; }
.page-title .bi { color: var(--primary); }
.section-title { font-size: 1.5rem; font-weight: 600; }
.card-title { font-size: 1.25rem; font-weight: 600; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

/* ===== Card ===== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}
.card-body { padding: 20px; }
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  transition: background .15s, border-color .15s, color .15s;
  line-height: 1.4;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-600); border-color: var(--primary-600); color: #fff; }
.btn-secondary { background: #6c757d; color: #fff; border-color: #6c757d; }
.btn-secondary:hover { background: #5c636a; color: #fff; }
.btn-outline-primary { color: var(--primary); border-color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-outline-secondary { color: var(--muted); border-color: var(--border-strong); }
.btn-outline-secondary:hover { background: var(--hover); color: var(--text); }
.btn-outline-danger { color: var(--danger); border-color: var(--danger); }
.btn-outline-danger:hover { background: var(--danger); color: #fff; }
.btn-light { background: #fff; color: var(--text); border-color: var(--border); }
.btn-light:hover { background: var(--hover); }
.btn-sm { padding: 4px 10px; font-size: .875rem; }
.btn-lg { padding: 10px 20px; font-size: 1.05rem; }
.w-100 { width: 100%; }
.btn-group { display: inline-flex; }
.btn-group .btn { border-radius: 0; }
.btn-group .btn:first-child { border-top-left-radius: var(--r-sm); border-bottom-left-radius: var(--r-sm); }
.btn-group .btn:last-child  { border-top-right-radius: var(--r-sm); border-bottom-right-radius: var(--r-sm); }
.btn-group .btn + .btn { margin-left: -1px; }

/* ===== Form ===== */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: .95rem;
}
.required::after { content: " *"; color: var(--danger); }
.form-control, .form-select {
  width: 100%;
  height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--text);
  font-size: 1rem;
  transition: border-color .15s, box-shadow .15s;
}
.form-control:focus, .form-select:focus {
  outline: none;
  border-color: #86b7fe;
  box-shadow: 0 0 0 3px rgba(13,110,253,.18);
}
.form-control::placeholder { color: #aab1b7; }
textarea.form-control { height: auto; resize: vertical; min-height: 86px; }
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%236c757d' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 10px;
  padding-right: 36px;
}
.form-hint { display: block; font-size: .85rem; color: var(--muted); margin-top: 4px; }
.input-icon { position: relative; }
.input-icon .bi {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: var(--muted);
}
.input-icon .form-control,
.input-icon .form-select { padding-left: 38px; }

/* ===== Duration picker ===== */
.duration-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.duration-picker .dp-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  border-radius: var(--r-sm);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
  font-family: inherit;
}
.duration-picker .dp-btn:hover {
  background: var(--hover);
  border-color: var(--primary);
}
.duration-picker .dp-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.time-summary {
  padding: 10px 12px;
  background: var(--primary-50);
  color: var(--primary);
  border-radius: var(--r-sm);
  font-size: .9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.time-summary.error {
  background: var(--danger-50);
  color: var(--danger);
}

.check-row { display: flex; align-items: center; gap: 8px; padding: 6px 0; }
.check-row input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--primary); }
.check-row label { cursor: pointer; user-select: none; }

.check-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px 18px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: #fafbfc;
}

.role-radio-grid { display: flex; gap: 12px; }
.role-radio {
  flex: 1;
  border: 1px solid var(--border);
  padding: 12px 14px;
  border-radius: var(--r-sm);
  display: flex; gap: 10px; align-items: center; cursor: pointer;
  background: #fff;
}
.role-radio.active { border-color: var(--primary); background: var(--primary-50); }
.role-radio input[type=radio] { accent-color: var(--primary); }
.role-radio .lbl { font-weight: 600; }

/* ===== Alerts ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}
.alert .bi { font-size: 1.1rem; margin-top: 1px; }
.alert-success { background: var(--success-50); color: #0a3622; border-color: #a3cfbb; }
.alert-danger  { background: var(--danger-50);  color: #58151c; border-color: #f1aeb5; }
.alert-warning { background: var(--warning-50); color: #664d03; border-color: #ffe69c; }
.alert-info    { background: var(--info-50);    color: #055160; border-color: #9eeaf9; }
.alert-close {
  margin-left: auto;
  background: none; border: none;
  color: inherit; opacity: .65;
  font-size: 1rem;
  padding: 0 4px;
  cursor: pointer;
}
.alert-close:hover { opacity: 1; }

/* ===== Badges ===== */
.badge {
  display: inline-flex; align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  line-height: 1;
  text-transform: lowercase;
}
.badge-success { background: var(--success-50); color: #0a3622; }
.badge-secondary { background: #e9ecef; color: #495057; }
.badge-danger { background: var(--danger); color: #fff; }
.badge-user  { background: #e9ecef; color: #495057; }
.badge-admin { background: var(--danger); color: #fff; }

/* ===== Stat cards ===== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.stat-card {
  border-radius: var(--r-lg);
  padding: 18px 20px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.stat-card .icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,.2);
  display: grid; place-items: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-card .label { font-size: .85rem; opacity: .9; font-weight: 500; margin-bottom: 2px; }
.stat-card .num { font-size: 1.75rem; font-weight: 700; line-height: 1.1; }
.stat-card.primary { background: linear-gradient(135deg, #0d6efd, #0a58ca); }
.stat-card.success { background: linear-gradient(135deg, #198754, #146c43); }
.stat-card.info    { background: linear-gradient(135deg, #0dcaf0, #087990); }
.stat-card.warning { background: linear-gradient(135deg, #ffc107, #cc9a06); color: #3a2e00; }
.stat-card.warning .icon { background: rgba(0,0,0,.12); }

/* ===== Table ===== */
.table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: .95rem;
}
.table thead th {
  background: #f8f9fa;
  text-align: left;
  font-weight: 600;
  font-size: .85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: #fafbfc; }
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-card);
}
.cell-actions { display: flex; gap: 6px; }
.room-dot { width: 8px; height: 8px; border-radius: 999px; display: inline-block; }

/* Avatar */
.avatar {
  width: 32px; height: 32px; border-radius: 999px;
  color: #fff; display: inline-grid; place-items: center;
  font-size: .82rem; font-weight: 600;
}
.avatar-sm { width: 26px; height: 26px; font-size: .78rem; }

/* Booking count pill */
.count-pill {
  display: inline-block;
  min-width: 32px;
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 600; font-size: .85rem;
  text-align: center;
}
.count-pill.has { background: var(--primary-50); color: var(--primary); }
.count-pill.zero { background: #f1f3f5; color: var(--muted); }

/* ===== Calendar ===== */
.cal-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: #fff;
  flex-wrap: wrap;
  gap: 10px;
}
.cal-toolbar .group { display: flex; align-items: center; gap: 6px; }
.cal-title { font-size: 1.15rem; font-weight: 600; }
.cal-nav-btn {
  width: 34px; height: 34px;
  border: 1px solid var(--border-strong);
  background: #fff;
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: var(--text);
}
.cal-nav-btn:hover { background: var(--hover); }

.cal-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  background: #fff;
}
.cal-grid .corner { background: #fff; border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); }
.cal-grid .day-head {
  text-align: center;
  padding: 10px 6px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-size: .8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
}
.cal-grid .day-head .num { display: block; font-size: 1.2rem; font-weight: 600; color: var(--text); margin-top: 2px; }
.cal-grid .day-head.today .num { color: var(--primary); }
.cal-grid .hour-label {
  text-align: right;
  padding: 8px 8px 0;
  font-size: .75rem;
  color: var(--muted);
  border-right: 1px solid var(--border);
  border-bottom: 1px dashed #eef0f3;
  height: 56px;
  position: relative;
}
.cal-grid .slot {
  border-right: 1px solid var(--border);
  border-bottom: 1px dashed #eef0f3;
  height: 56px;
  position: relative;
}
.cal-grid .slot.today { background: rgba(13,110,253,.04); }
.cal-event {
  position: absolute;
  padding: 6px 8px;
  border-radius: 6px;
  color: #fff;
  font-size: .78rem;
  line-height: 1.25;
  box-shadow: 0 1px 2px rgba(0,0,0,.12);
  overflow: hidden;
  cursor: pointer;
}
.cal-event .et { font-weight: 600; }
.cal-event .er { opacity: .85; font-size: .72rem; }

.now-line {
  position: absolute;
  left: 0; right: 0;
  height: 0;
  border-top: 2px solid var(--danger);
  z-index: 2;
}
.now-line::before {
  content: '';
  position: absolute;
  left: -6px; top: -6px;
  width: 10px; height: 10px;
  background: var(--danger);
  border-radius: 50%;
}

.cal-legend {
  display: flex; flex-wrap: wrap; gap: 14px;
  padding: 12px 18px; border-top: 1px solid var(--border);
  background: #fafbfc; font-size: .82rem; color: var(--muted);
  align-items: center;
}
.cal-legend strong { color: var(--text); }
.cal-legend .lg { display: inline-flex; align-items: center; gap: 6px; }
.cal-legend .sw { width: 10px; height: 10px; border-radius: 3px; }

/* ===== Room card ===== */
.room-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.room-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .15s, transform .15s;
}
.room-card:hover { box-shadow: var(--shadow-hover); }
.room-card .room-hero {
  height: 90px;
  display: grid; place-items: center;
  font-size: 2.2rem;
  color: rgba(255,255,255,.95);
  position: relative;
}
.room-card .room-hero .badge {
  position: absolute; top: 12px; right: 12px;
  background: rgba(255,255,255,.92);
  color: var(--text);
}
.room-card .room-hero.r0 { background: linear-gradient(135deg, #0d6efd, #0a58ca); }
.room-card .room-hero.r1 { background: linear-gradient(135deg, #198754, #146c43); }
.room-card .room-hero.r2 { background: linear-gradient(135deg, #6f42c1, #59359a); }
.room-card .room-hero.r3 { background: linear-gradient(135deg, #fd7e14, #ca6510); }
.room-card .room-hero.r4 { background: linear-gradient(135deg, #20c997, #1aa179); }
.room-card .room-hero.r5 { background: linear-gradient(135deg, #d63384, #ab2969); }
.room-card .room-hero.r6 { background: linear-gradient(135deg, #0dcaf0, #087990); }
.room-card .room-hero.r7 { background: linear-gradient(135deg, #dc3545, #b02a37); }
.room-card .room-body {
  padding: 16px 18px;
  display: flex; flex-direction: column;
  gap: 8px;
  flex: 1;
}
.room-card .room-title { font-size: 1.1rem; font-weight: 600; }
.room-card .room-meta {
  display: flex; align-items: center; gap: 6px;
  color: var(--muted);
  font-size: .9rem;
}
.room-card .room-meta .bi { color: var(--muted); }
.room-card .room-desc {
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.45;
}
.room-card .room-eq {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 4px;
}
.room-card .eq-chip {
  background: var(--hover);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 999px;
  font-size: .75rem;
  color: var(--text);
  display: inline-flex; align-items: center; gap: 4px;
}
.room-card .room-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap;
}

/* ===== Auth ===== */
.auth-shell {
  flex: 1;
  background: linear-gradient(180deg, #eef3fb 0%, #f5f7fb 100%);
  display: grid; place-items: center;
  padding: 40px 16px;
}
.auth-card {
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-pop);
  width: 100%;
  max-width: 440px;
  padding: 32px;
}
.auth-card .auth-head { text-align: center; margin-bottom: 24px; }
.auth-card .auth-head .icon-wrap {
  width: 56px; height: 56px;
  background: var(--primary-50);
  color: var(--primary);
  border-radius: 16px;
  display: grid; place-items: center;
  margin: 0 auto 14px;
  font-size: 1.6rem;
}
.auth-card .auth-head .icon-wrap.success { background: var(--success-50); color: var(--success); }
.auth-card .auth-head h1 { font-size: 1.5rem; font-weight: 600; }
.auth-card .auth-head p { color: var(--muted); margin-top: 4px; font-size: .92rem; }
.auth-footer-link { text-align: center; color: var(--muted); font-size: .92rem; margin-top: 18px; }

/* ===== Empty state ===== */
.empty-state {
  text-align: center;
  padding: 48px 20px;
}
.empty-state .empty-icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--primary-50); color: var(--primary);
  display: grid; place-items: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}

/* ===== Utility ===== */
.row { display: flex; flex-wrap: wrap; gap: 16px; }
.row > .col { flex: 1; min-width: 0; }
.col-2 { flex: 2 !important; }
.flex { display: flex; }
.flex.between { justify-content: space-between; align-items: center; gap: 16px; }
.flex.center { align-items: center; }
.flex.wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 24px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.ml-auto { margin-left: auto; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.divider { height: 1px; background: var(--border); margin: 16px 0; }

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .stat-grid, .room-grid { grid-template-columns: repeat(2, 1fr); }
  .navbar { padding: 0 16px; gap: 12px; }
  .navbar .nav-link { padding: 6px 10px; font-size: .9rem; }
}
@media (max-width: 767px) {
  .stat-grid, .room-grid { grid-template-columns: 1fr; }
  .navbar .nav-links { display: none; }
  .container { padding: 16px; }
  .page-title { font-size: 1.5rem; }
  .row { flex-direction: column; }
  .table-wrap { overflow-x: auto; }
  .cal-grid { grid-template-columns: 48px repeat(7, minmax(80px, 1fr)); overflow-x: auto; }
}