/* ============================================
   Fee Management System — Stylesheet
   Dark Theme with Glassmorphism
   ============================================ */

/* --- CSS Variables --- */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(30, 41, 59, 0.6);
    --border-color: rgba(148, 163, 184, 0.15);
    --border-light: rgba(148, 163, 184, 0.08);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #06b6d4);
    --accent-gradient-hover: linear-gradient(135deg, #4f46e5, #7c3aed, #0891b2);

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    --sidebar-width: 260px;
    --topbar-height: 60px;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Light Theme --- */
[data-theme="light"] {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.75);
    --border-color: rgba(100, 116, 139, 0.2);
    --border-light: rgba(100, 116, 139, 0.1);

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.2);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover { color: var(--accent-secondary); }

/* --- App Layout --- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin var(--transition);
}

.main-content.full-width {
    margin-left: 0;
}

.content-area {
    flex: 1;
    padding: 24px;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition);
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-logo i {
    font-size: 1.4rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.nav-group {
    margin-bottom: 8px;
}

.nav-group-label {
    padding: 8px 20px 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    border-left: 3px solid transparent;
    text-decoration: none;
}

.nav-item:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.08);
    border-left-color: var(--accent-primary);
}

.nav-item.active {
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.12);
    border-left-color: var(--accent-primary);
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 0.95rem;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-align: center;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

/* --- Top Bar --- */
.top-bar {
    height: var(--topbar-height);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 50;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}
.sidebar-toggle:hover { background: var(--bg-tertiary); }

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-greeting {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-greeting i { color: var(--accent-primary); }

/* --- Theme Toggle --- */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    padding: 2px;
}
.theme-toggle:hover {
    border-color: var(--accent-primary);
}
.theme-toggle .toggle-knob {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gradient);
    transition: transform var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    color: #fff;
}
[data-theme="light"] .theme-toggle .toggle-knob {
    transform: translateX(20px);
}

/* --- Page Header --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
    background: var(--accent-gradient-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: #059669;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
    justify-content: center;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    transition: all var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(99, 102, 241, 0.2);
}

.stat-info h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-info .stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
}

.stat-icon.cyan { background: rgba(6, 182, 212, 0.1); color: var(--accent-cyan); }
.stat-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.stat-icon.yellow { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.stat-icon.red { background: rgba(239, 68, 68, 0.1); color: var(--danger); }

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
}

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

table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

table td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

table tbody tr {
    transition: background var(--transition);
}

table tbody tr:hover {
    background: rgba(99, 102, 241, 0.04);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--danger);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: all var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 10.5l-5-5h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-text {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-error {
    font-size: 0.78rem;
    color: var(--danger);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.form-check label {
    margin-bottom: 0;
    cursor: pointer;
    font-weight: 400;
}

/* Checkbox grid for permissions */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

/* --- Alerts --- */
.alert {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    margin: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.9rem;
    animation: slideDown 0.3s ease;
}

.alert-success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--info);
}

.alert-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition);
}
.alert-close:hover { opacity: 1; }

/* --- Toast Notifications --- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    min-width: 280px;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideInRight 0.3s ease;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

.toast-success {
    background: rgba(16, 185, 129, 0.9);
    color: #fff;
}

.toast-error {
    background: rgba(239, 68, 68, 0.9);
    color: #fff;
}

.toast-info {
    background: rgba(59, 130, 246, 0.9);
    color: #fff;
}

.toast-warning {
    background: rgba(245, 158, 11, 0.9);
    color: #fff;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 560px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.25s ease;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 { font-size: 1.1rem; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    transition: color var(--transition);
}
.modal-close:hover { color: var(--text-primary); }

.modal-body { padding: 24px; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-success { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--info); }
.badge-primary { background: rgba(99,102,241,0.15); color: var(--accent-primary); }

/* --- Loading Spinner --- */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: inline-block;
}

.btn .spinner {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: 20px;
}

/* --- Login Page --- */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    border-radius: 50%;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(6,182,212,0.1) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo i {
    font-size: 2.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 12px;
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* --- Dynamic Fields Builder --- */
.field-builder {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 12px;
    background: var(--bg-tertiary);
    position: relative;
    animation: fadeIn 0.3s ease;
}

.field-builder .remove-field {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.field-builder .remove-field:hover {
    background: var(--danger);
    color: #fff;
}

/* --- Filter Bar --- */
.filter-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: end;
}

.filter-bar .form-group {
    margin-bottom: 0;
    min-width: 180px;
}

/* --- Voucher Print --- */
.voucher-print {
    background: #fff;
    color: #000;
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
    font-family: 'Inter', sans-serif;
}

.voucher-print h1 {
    color: #1e293b;
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.voucher-print table {
    border: 1px solid #e2e8f0;
}

.voucher-print th {
    background: #f1f5f9;
    color: #475569;
    font-size: 0.85rem;
}

.voucher-print td {
    color: #1e293b;
    border: 1px solid #e2e8f0;
}

.voucher-total {
    font-weight: 700;
    font-size: 1.1rem;
}

@media print {
    .no-print { display: none !important; }
    body { background: #fff; }
    .voucher-print { box-shadow: none; }
}

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .sidebar-close { display: block; }
    .sidebar-toggle { display: block; }
    .sidebar-overlay.show { display: block; }

    .main-content {
        margin-left: 0;
    }

    .content-area {
        padding: 16px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
    }

    .filter-bar .form-group {
        min-width: 100%;
    }

    .login-card {
        padding: 32px 24px;
    }
}