/* HR System - Main Stylesheet */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --info: #0891b2;
    --sidebar-width: 260px;
    --sidebar-bg: #1e293b;
    --topbar-height: 60px;
}

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

body {
    font-family: 'Sarabun', 'Noto Sans Thai', sans-serif;
    background: #f1f5f9;
    color: #334155;
    font-size: 15px;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s;
}

.sidebar-brand {
    padding: 20px 16px;
    border-bottom: 1px solid #334155;
}

.sidebar-brand h5 {
    color: #f8fafc;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}

.sidebar-brand small {
    color: #94a3b8;
    font-size: 12px;
}

.sidebar-nav { padding: 12px 0; }

.nav-section {
    padding: 8px 16px 4px;
    font-size: 11px;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: #f8fafc;
    background: rgba(255,255,255,0.05);
    border-left-color: var(--primary);
}

.sidebar-nav a i { width: 20px; text-align: center; font-size: 15px; }

/* ===== TOPBAR ===== */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 999;
}

.topbar-title { font-size: 18px; font-weight: 600; color: #1e293b; }

.topbar-right { display: flex; align-items: center; gap: 12px; }

.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: #f1f5f9;
    border-radius: 8px;
    font-size: 13px;
    color: #475569;
}

.user-badge .avatar {
    width: 32px; height: 32px;
    background: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 13px; font-weight: 600;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    padding-top: var(--topbar-height);
    min-height: 100vh;
}

.page-content { padding: 24px; }

/* ===== CARDS ===== */
.card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #f1f5f9;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
}

/* ===== STAT CARDS ===== */
.stat-card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
}

.stat-icon.blue { background: #dbeafe; color: #2563eb; }
.stat-icon.green { background: #dcfce7; color: #16a34a; }
.stat-icon.yellow { background: #fef9c3; color: #ca8a04; }
.stat-icon.red { background: #fee2e2; color: #dc2626; }
.stat-icon.purple { background: #f3e8ff; color: #7c3aed; }

.stat-info h3 { font-size: 26px; font-weight: 700; color: #1e293b; }
.stat-info p { font-size: 13px; color: #64748b; margin-top: 2px; }

/* ===== TABLES ===== */
.table-responsive { overflow-x: auto; border-radius: 8px; }

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

table thead th {
    background: #f8fafc;
    padding: 12px 16px;
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid #e2e8f0;
    white-space: nowrap;
}

table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 14px;
    color: #334155;
}

table tbody tr:hover { background: #f8fafc; }
table tbody tr:last-child td { border-bottom: none; }

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: #dcfce7; color: #16a34a; }
.badge-danger { background: #fee2e2; color: #dc2626; }
.badge-warning { background: #fef3c7; color: #d97706; }
.badge-info { background: #e0f2fe; color: #0369a1; }
.badge-secondary { background: #f1f5f9; color: #64748b; }
.badge-primary { background: #dbeafe; color: #2563eb; }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: #16a34a; color: #fff; }
.btn-success:hover { background: #15803d; color: #fff; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-warning { background: #d97706; color: #fff; }
.btn-warning:hover { background: #b45309; color: #fff; }
.btn-secondary { background: #f1f5f9; color: #475569; }
.btn-secondary:hover { background: #e2e8f0; }
.btn-outline { background: transparent; border: 1px solid #e2e8f0; color: #475569; }
.btn-outline:hover { background: #f8fafc; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 6px 8px; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: #374151; margin-bottom: 6px; }
.form-required { color: var(--danger); margin-left: 2px; }

.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    color: #1f2937;
    background: #fff;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

select.form-control { appearance: none; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-row { display: grid; gap: 16px; }
.form-row-2 { grid-template-columns: 1fr 1fr; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ===== ALERTS ===== */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success { background: #dcfce7; color: #15803d; border-left: 4px solid #16a34a; }
.alert-danger { background: #fee2e2; color: #b91c1c; border-left: 4px solid #dc2626; }
.alert-warning { background: #fef3c7; color: #b45309; border-left: 4px solid #d97706; }
.alert-info { background: #e0f2fe; color: #0369a1; border-left: 4px solid #0284c7; }

/* ===== LOGIN PAGE ===== */
.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #1e40af 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}

.login-logo .icon {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 16px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 28px;
    margin-bottom: 12px;
}

.login-logo h4 { font-size: 20px; font-weight: 700; color: #1e293b; }
.login-logo p { font-size: 13px; color: #64748b; margin-top: 4px; }

/* ===== MISC ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.page-header h1 { font-size: 22px; font-weight: 700; color: #1e293b; }
.page-header p { font-size: 13px; color: #64748b; margin-top: 2px; }

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: #94a3b8;
}

.empty-state i { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

.divider { border: none; border-top: 1px solid #e2e8f0; margin: 16px 0; }

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .topbar { left: 0; }
    .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
}

/* role badge */
.role-admin { background: #fef3c7; color: #92400e; }
.role-hr { background: #e0f2fe; color: #075985; }
.role-employee { background: #f3e8ff; color: #5b21b6; }

/* Print */
@media print {
    .sidebar, .topbar, .btn, .no-print { display: none !important; }
    .main-content { margin-left: 0; padding-top: 0; }
}