:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --sidebar-bg: #111827;
    --sidebar-text: #d1d5db;
    --bg: #f3f4f6;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --card-bg: #ffffff;
    --border: #e5e7eb;
}
* { box-sizing: border-box; }
body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    margin: 0;
    color: #1f2937;
}
.wrapper { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    flex-shrink: 0;
    padding: 20px 0;
}
.sidebar h2 {
    color: #fff;
    text-align: center;
    font-size: 20px;
    margin: 0 0 20px;
    padding: 0 15px;
}
.sidebar a {
    display: block;
    color: var(--sidebar-text);
    text-decoration: none;
    padding: 12px 24px;
    font-size: 14px;
    border-left: 3px solid transparent;
}
.sidebar a:hover, .sidebar a.active {
    background: rgba(255,255,255,0.08);
    border-left-color: var(--primary);
    color: #fff;
}

/* Main content */
.main { flex: 1; padding: 24px; }
.topbar {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 24px;
}
.topbar h1 { font-size: 22px; margin: 0; }
.user-badge { font-size: 14px; color: #4b5563; }
.user-badge a { color: var(--danger); margin-left: 12px; text-decoration: none; }

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card-bg); border-radius: 8px; padding: 18px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.stat-card .value { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat-card .label { font-size: 13px; color: #6b7280; margin-top: 4px; }

/* Table */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: #f9fafb; font-weight: 600; color: #374151; }
tr:hover { background: #f9fafb; }

/* Forms */
label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: #374151; }
input, select, textarea {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 14px; margin-bottom: 14px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Buttons */
.btn {
    display: inline-block; padding: 9px 18px; border-radius: 6px;
    border: none; cursor: pointer; font-size: 14px; text-decoration: none; font-weight: 600;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: #374151; }

/* Badges */
.badge { padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-gray { background: #f3f4f6; color: #4b5563; }

/* Alert */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-danger { background: #fee2e2; color: #991b1b; }

/* Login page */
.login-page {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.login-box {
    background: #fff; padding: 40px; border-radius: 10px; width: 360px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.login-box h1 { text-align: center; font-size: 22px; margin-bottom: 24px; }

/* Room grid (calendar-style) */
.room-status-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 12px; }
.room-box {
    padding: 14px 10px; border-radius: 8px; text-align: center; color: #fff; font-weight: 600; font-size: 13px;
}
.room-box small { display: block; font-weight: 400; opacity: .9; margin-top: 4px; }
.room-available { background: var(--success); }
.room-occupied { background: var(--danger); }
.room-cleaning { background: var(--warning); }
.room-maintenance { background: #6b7280; }

/* Public booking engine */
.public-header { background: var(--primary); color: #fff; padding: 40px 20px; text-align: center; }
.public-header h1 { margin: 0 0 10px; }
.public-container { max-width: 1000px; margin: -40px auto 40px; padding: 0 20px; }
.search-box { background: #fff; border-radius: 10px; padding: 24px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); margin-bottom: 30px; }
.search-box .form-row { grid-template-columns: 1fr 1fr 1fr 1fr; align-items: end; }
.room-card { background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.08); margin-bottom: 20px; display: flex; }
.room-card .info { padding: 20px; flex: 1; }
.room-card .price { font-size: 22px; font-weight: 700; color: var(--primary); }

@media (max-width: 768px) {
    .wrapper { flex-direction: column; }
    .sidebar { width: 100%; }
    .form-row, .search-box .form-row { grid-template-columns: 1fr; }
    .room-card { flex-direction: column; }
}