:root {
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --border-color: #e2e8f0;
    --sidebar-width: 250px;
    --bg-hover: #f1f5f9;
    --text-color: #0f172a;

    /* Font scale */
    --font-xs: 0.75rem;     /* 12px */
    --font-sm: 0.875rem;    /* 14px */
    --font-base: 1rem;      /* 16px */
    --font-md: 1.125rem;    /* 18px */
    --font-lg: 1.25rem;     /* 20px */
    --font-xl: 1.5rem;      /* 24px */
    --font-2xl: 2rem;       /* 32px */
    --font-3xl: 2.5rem;     /* 40px */
    --font-4xl: 3.5rem;     /* 56px */
    --font-5xl: 4rem;       /* 64px */
    --font-6xl: 5rem;       /* 80px */
}

[data-theme="dark"] {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --border-color: #334155;
    --bg-hover: #334155;
    --text-color: #f8fafc;
}

.sidebar-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 1rem;
    border-radius: 8px;
    display: block;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    font-size: var(--font-base);
}

/* Auth Layout */
.auth-container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.auth-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.auth-card h1 {
    font-size: var(--font-xl);
    margin-bottom: 0.5rem;
    text-align: center;
}

.auth-card p {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 2rem;
    font-size: var(--font-sm);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

.form-select, .form-textarea, .form-input {
    background: var(--bg-hover) !important;
    color: var(--text-color) !important;
}

.form-select option {
    background: var(--bg-dark);
    color: var(--text-color);
}

.btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.btn-danger {
    background: var(--danger-color);
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-xs {
    padding: 0.25rem 0.5rem;
    font-size: var(--font-xs);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: var(--font-sm);
}

.btn-success {
    background: var(--success-color);
}

.btn-success:hover {
    background: #059669;
}

/* Dashboard Layout */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    display: none;
    /* hidden on login */
    flex-direction: column;
    height: 100vh;
    position: fixed;
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.sidebar-header h2 {
    font-size: var(--font-lg);
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    flex: 1;
}

.nav-links li {
    padding: 0.25rem 1rem;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--bg-dark);
    color: var(--primary-color);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    display: none;
    /* hidden on login */
}

.header, .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    position: relative;
    width: 100%;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
    display: inline-block;
}

.user-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.6rem 1.25rem;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
    user-select: none;
}

.user-dropdown-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-color);
}

.user-dropdown-btn .user-name-text {
    font-weight: 500;
    font-size: var(--font-base);
    color: var(--text-primary);
}

.user-dropdown-btn .chevron {
    font-size: var(--font-xs);
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.user-dropdown:hover .chevron {
    transform: rotate(180deg);
}

.user-dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: var(--bg-card);
    min-width: 240px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    z-index: 1001;
    padding: 0.5rem;
    animation: dropdownFade 0.2s ease;
}

/* Invisible bridge to prevent dropdown from closing when moving mouse across the 8px gap */
.user-dropdown-content::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    right: 0;
    height: 12px;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.user-dropdown:hover .user-dropdown-content {
    display: block;
}

.user-dropdown-item {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    text-decoration: none !important;
    font-size: var(--font-base);
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
}

.user-dropdown-item:hover {
    background: var(--bg-dark);
    color: var(--primary-color);
}

.user-dropdown-item.text-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.user-dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.4rem 0.5rem;
}

.user-dropdown-item i {
    font-size: var(--font-md);
    opacity: 0.7;
}

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.card h3 {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    margin-bottom: 0.5rem;
}

.card .value {
    font-size: var(--font-2xl);
    font-weight: 600;
}

/* Tables */
.table-container {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-top: 1.5rem;
}

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

th,
td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-sm);
}

tr:hover td {
    background: var(--bg-dark);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: var(--font-xs);
    font-weight: 500;
    text-transform: capitalize;
}

.badge.pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
    white-space: nowrap;
}

.badge.pending-payment {
    background: rgba(245, 158, 11, 0.1);
    color: #e67e22;
    border: 1px solid rgba(230, 126, 34, 0.3);
    white-space: nowrap;
}

.badge.approved,
.badge.present {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.badge.rejected,
.badge.absent {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.badge.wfh {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
}

.badge.paid {
    background: rgba(59, 130, 246, 0.15);
    color: #3f51b5;
    border: 1px solid rgba(63, 81, 181, 0.3);
}

.badge.received {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge.not_received {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Utilities */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 {
    margin-top: 1rem;
}

.mb-1 {
    margin-bottom: 1rem;
}

.text-xs { font-size: var(--font-xs); }
.text-sm { font-size: var(--font-sm); }
.text-base { font-size: var(--font-base); }
.text-md { font-size: var(--font-md); }
.text-lg { font-size: var(--font-lg); }
.text-xl { font-size: var(--font-xl); }
.text-2xl { font-size: var(--font-2xl); }
.text-3xl { font-size: var(--font-3xl); }
.text-4xl { font-size: var(--font-4xl); }
.text-5xl { font-size: var(--font-5xl); }
.text-6xl { font-size: var(--font-6xl); }

.color-primary { color: var(--text-primary); }
.color-secondary { color: var(--text-secondary); }
.color-danger { color: var(--danger-color); }
.color-success { color: var(--success-color); }
.color-warning { color: var(--warning-color); }
.color-blue { color: var(--primary-color); }

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-overlay.visible {
    display: flex;
}

/* Notification Toast */
#toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: white;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

#toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    background: var(--success-color);
}

.toast-error {
    background: var(--danger-color);
}

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

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

input:checked+.slider:before {
    transform: translateX(20px);
}

/* Sidebar scroll */
.sidebar {
    overflow-y: auto;
}
/* Global Toast Notifications */
#toastContainer {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    padding: 10px 16px;
    border-radius: 8px;
    color: white;
    font-size: var(--font-sm);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideInToast 0.3s ease;
    box-shadow: var(--shadow-md);
    pointer-events: auto;
}

.toast.success { background: var(--success-color); }
.toast.error { background: var(--danger-color); }
.toast.warning { background: var(--warning-color); }

.toast-close {
    background: none;
    border: none;
    color: white;
    font-size: var(--font-lg);
    cursor: pointer;
    margin-left: 8px;
    opacity: 0.7;
}

.toast-close:hover { opacity: 1; }

@keyframes slideInToast {
    from { transform: translateX(100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}