/* ==========================================================================
   SIMPLE, CLEAN & EASY-TO-USE ENTERPRISE HRMS STYLESHEET
   Professional, Mobile-friendly, High Contrast, Responsive
   ========================================================================== */

:root {
    --primary: #1e3a8a;       /* Deep Slate Blue */
    --primary-hover: #1e40af;
    --primary-light: #eff6ff;
    --secondary: #475569;     /* Slate */
    --success: #059669;       /* Emerald */
    --success-light: #ecfdf5;
    --warning: #d97706;       /* Amber */
    --warning-light: #fffbeb;
    --danger: #dc2626;        /* Crimson */
    --danger-light: #fef2f2;
    --dark: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --white: #ffffff;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.5;
    font-size: 14px;
}

/* AUTH / LOGIN SCREEN */
.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    padding: 32px;
}

.auth-header {
    text-align: center;
    margin-bottom: 24px;
}

.auth-logo {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 12px auto;
}

.auth-header h2 {
    font-size: 20px;
    color: var(--dark);
    font-weight: 700;
}

.auth-header p {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 4px;
}

.password-field {
    position: relative;
    display: flex;
}

.password-field .form-control {
    padding-right: 40px;
}

.btn-toggle-pw {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    background: transparent;
    border: none;
    padding: 0 12px;
    color: var(--gray-400);
    cursor: pointer;
}

.btn-toggle-pw:hover {
    color: var(--gray-700);
}

.quick-demo-section {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.quick-demo-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    margin-bottom: 12px;
    text-align: center;
}

.quick-demo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.quick-btn {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: 12px;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.quick-btn:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.super-admin-btn { border-left: 3px solid #7c3aed; }
.admin-btn { border-left: 3px solid #2563eb; }
.mgr-btn { border-left: 3px solid #059669; }
.emp-btn { border-left: 3px solid #d97706; }

.auth-footer {
    margin-top: 24px;
    text-align: center;
    color: var(--gray-400);
    font-size: 12px;
}

/* APP SHELL & NAVIGATION */
.app-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-brand .logo-icon {
    font-size: 22px;
    color: var(--primary);
}

.brand-text h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
}

.brand-text span {
    font-size: 11px;
    color: var(--gray-500);
    font-weight: 500;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-profile-badge {
    text-align: right;
}

.user-profile-badge .user-name {
    font-weight: 600;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-end;
}

.user-profile-badge .user-subtext {
    font-size: 11px;
    color: var(--gray-500);
}

.btn-logout {
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    color: var(--danger);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-logout:hover {
    background: var(--danger-light);
    border-color: var(--danger);
}

/* MAIN NAVIGATION TABS */
.nav-container {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
}

.nav-tabs {
    display: flex;
    padding: 0 16px;
    list-style: none;
    min-width: max-content;
}

.nav-tab-item {
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.nav-tab-item:hover {
    color: var(--primary);
    background: var(--gray-50);
}

.nav-tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: var(--primary-light);
}

/* APP MAIN CONTENT */
.app-content {
    max-width: 1300px;
    margin: 20px auto;
    padding: 0 16px;
}

/* CARDS & PANELS */
.card {
    background: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-50);
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 20px;
}

/* GRID LAYOUTS */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-box {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-blue { background: #dbeafe; color: #1e40af; }
.stat-green { background: #d1fae5; color: #065f46; }
.stat-purple { background: #ede9fe; color: #5b21b6; }
.stat-amber { background: #fef3c7; color: #92400e; }

.stat-details h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
}

.stat-details p {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    margin-top: 2px;
}

/* TABLES */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}

.table th {
    background: var(--gray-50);
    padding: 12px 14px;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

/* BADGES */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 9999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-super_admin { background: #f3e8ff; color: #6b21a8; border: 1px solid #d8b4fe; }
.badge-admin { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.badge-dept_head { background: #e0e7ff; color: #3730a3; border: 1px solid #c7d2fe; }
.badge-manager { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.badge-employee { background: #f1f5f9; color: #334155; border: 1px solid #cbd5e1; }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }

/* FORMS & BUTTONS */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 13px;
}

.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--gray-800);
    background: var(--white);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary { background: var(--gray-100); border-color: var(--gray-300); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); }

.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #047857; }

.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: 4px 8px; font-size: 12px; }
.btn-block { width: 100%; }

/* ALERTS */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #a7f3d0; }
.alert-danger { background: var(--danger-light); color: var(--danger); border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-light); color: var(--warning); border: 1px solid #fde68a; }
.alert-info { background: var(--primary-light); color: var(--primary); border: 1px solid #bfdbfe; }
.d-none { display: none !important; }

/* MODALS */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    padding: 16px;
}

.modal-card {
    background: var(--white);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-50);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 18px;
    color: var(--gray-400);
    cursor: pointer;
}

.modal-close:hover { color: var(--dark); }

.modal-body {
    padding: 20px;
    overflow-y: auto;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background: var(--gray-50);
}

/* PERMISSIONS TOGGLE MATRIX (SUPER ADMIN SPECIAL CONTROL) */
.perm-matrix-table th {
    text-align: center;
}
.perm-matrix-table td {
    text-align: center;
}
.perm-matrix-table td:first-child,
.perm-matrix-table th:first-child {
    text-align: left;
}

.switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--gray-300);
    transition: .2s;
    border-radius: 20px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .2s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--success);
}

input:checked + .slider:before {
    transform: translateX(16px);
}

/* HIERARCHY TREE STYLING */
.tree-node {
    margin-left: 20px;
    padding-left: 12px;
    border-left: 2px dashed var(--gray-300);
    margin-top: 8px;
}

.node-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
}

/* MOBILE ADAPTATIONS */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 10px 16px;
    }
    .header-user {
        width: 100%;
        justify-content: space-between;
    }
    .user-profile-badge {
        text-align: left;
    }
    .grid-4 {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}