* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #2563eb;
    --primary-light: #dbeafe;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warn: #d97706;
    --warn-light: #fef3c7;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --sidebar-w: 200px;
}

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', sans-serif;
       background: var(--gray-50); color: var(--gray-900); display: flex; min-height: 100vh; }

/* Sidebar Toggle */
.sidebar-toggle { position: fixed; top: 12px; left: calc(var(--sidebar-w) - 40px); z-index: 200; background: transparent; color: var(--gray-300);
                  border: none; border-radius: 6px; width: 32px; height: 32px; font-size: 1.1rem; cursor: pointer;
                  display: flex; align-items: center; justify-content: center; transition: left 0.3s; }
.sidebar-toggle:hover { color: #fff; }
body.sidebar-collapsed .sidebar-toggle { left: 10px; background: var(--gray-900); color: #fff; border-radius: 6px; opacity: 0.7; }
body.sidebar-collapsed .sidebar-toggle:hover { opacity: 1; }

/* Sidebar */
.sidebar { width: var(--sidebar-w); background: var(--gray-900); color: #fff; padding: 1.5rem 0;
           position: fixed; top: 0; left: 0; height: 100vh; overflow-y: auto; transition: transform 0.3s; z-index: 150; }
.sidebar.collapsed { transform: translateX(-100%); }
.sidebar .logo { font-size: 1.2rem; font-weight: 700; padding: 0 1.25rem 1.5rem; border-bottom: 1px solid var(--gray-700); margin-bottom: 0.5rem; }
.sidebar a { display: block; padding: 0.75rem 1.25rem; color: var(--gray-300); text-decoration: none;
             font-size: 0.9rem; transition: background 0.15s; }
.sidebar a:hover { background: var(--gray-700); color: #fff; }
.sidebar a.active { background: var(--primary); color: #fff; }

/* Content */
.content { margin-left: var(--sidebar-w); padding: 2rem; padding-top: 3rem; flex: 1; max-width: 1800px; transition: margin-left 0.3s; }
body.sidebar-collapsed .content { margin-left: 0; }

/* Flash */
.flash-messages { margin-bottom: 1rem; }
.flash { padding: 0.75rem 1rem; border-radius: 6px; margin-bottom: 0.5rem; font-size: 0.9rem; }
.flash.success { background: var(--success-light); color: var(--success); }
.flash.error { background: var(--danger-light); color: var(--danger); }

/* Typography */
h1 { font-size: 1.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 1.2rem; margin-bottom: 1rem; }

/* Cards */
.card { background: #fff; border-radius: 8px; padding: 1.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        margin-bottom: 1rem; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: #fff; border-radius: 8px; padding: 1.25rem; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.stat-card .label { font-size: 0.8rem; color: var(--gray-500); margin-bottom: 0.25rem; }
.stat-card .value { font-size: 1.8rem; font-weight: 700; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid var(--gray-200); font-size: 0.9rem; }
th { background: var(--gray-50); font-weight: 600; color: var(--gray-700); position: sticky; top: 0; }
tr:hover { background: var(--gray-50); }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.3rem; color: var(--gray-700); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--gray-300); border-radius: 6px;
    font-size: 0.9rem; background: #fff; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.5rem 1rem; border: none;
       border-radius: 6px; font-size: 0.85rem; font-weight: 600; cursor: pointer; text-decoration: none; transition: background 0.15s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-outline { background: #fff; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover { background: var(--gray-100); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-group { display: flex; gap: 0.5rem; margin-bottom: 1rem; }

/* Badges */
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 99px; font-size: 0.75rem; font-weight: 600; }
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-yellow { background: var(--warn-light); color: var(--warn); }
.badge-red { background: var(--danger-light); color: var(--danger); }

/* Calendar grid */
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }
.cal-header { background: var(--gray-700); color: #fff; padding: 0.5rem; text-align: center; font-size: 0.8rem; font-weight: 600; }
.cal-day { background: #fff; min-height: 100px; padding: 0.4rem; border: 1px solid var(--gray-200); }
.cal-day .date-num { font-size: 0.8rem; font-weight: 600; color: var(--gray-500); margin-bottom: 0.3rem; }
.cal-day.today .date-num { color: var(--primary); }
.cal-day .shift-entry { font-size: 0.7rem; padding: 0.15rem 0.3rem; margin-bottom: 2px;
                         border-radius: 3px; background: var(--primary-light); color: var(--primary); }
.cal-day .shift-entry.confirmed { background: var(--success-light); color: var(--success); }
.cal-day.empty { background: var(--gray-50); }
.cal-day.sunday .date-num { color: var(--danger); }
.cal-day.saturday .date-num { color: var(--primary); }

/* Request table */
.req-table { overflow-x: auto; }
.req-table table { min-width: 600px; }
.req-table td input[type="time"] { width: 100px; padding: 0.2rem; font-size: 0.8rem; }
.req-table td input[type="checkbox"] { width: 18px; height: 18px; }

/* Daily */
.daily-card { display: flex; align-items: center; gap: 1rem; padding: 1rem; background: #fff;
              border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); margin-bottom: 0.5rem; }
.daily-card .name { font-weight: 600; min-width: 80px; }
.daily-card .time { color: var(--gray-500); font-size: 0.9rem; min-width: 120px; }
.daily-card select { padding: 0.4rem; border-radius: 6px; border: 1px solid var(--gray-300); }

/* Period nav */
.period-nav { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.period-nav .period-label { font-size: 1.1rem; font-weight: 700; }

/* Staff select for request */
.staff-select { margin-bottom: 1rem; }
.staff-select select { padding: 0.5rem; font-size: 1rem; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar-toggle { top: 8px; left: 8px; width: 32px; height: 32px; font-size: 1rem; }
    body:not(.sidebar-collapsed) .sidebar-toggle { left: 8px; top: 8px; background: rgba(17,24,39,0.7); }
    .sidebar { width: 240px; height: 100vh; position: fixed; top: 0; left: 0; z-index: 150; padding: 1rem 0; transform: translateX(-100%); }
    .sidebar:not(.collapsed) { transform: translateX(0); }
    .sidebar .logo { padding: 0.8rem 1rem; border-bottom: 1px solid var(--gray-700); margin-bottom: 0.5rem; }
    .sidebar a { padding: 0.7rem 1rem; font-size: 0.85rem; }
    .content { margin-left: 0; padding: 0.8rem; max-width:100%; padding-top: 50px; }
    body { flex-direction: column; }
    h1 { font-size:1.1rem; margin-bottom:0.8rem; }
    .form-row { grid-template-columns: 1fr; }
    .cal-grid { grid-template-columns: repeat(7, 1fr); }
    .cal-day { min-height: 60px; }
    table { font-size:0.8rem; }
    th, td { padding:0.4rem 0.5rem; font-size:0.8rem; }
}