:root {
    /* Color Palette */
    --primary: #4F46E5;
    /* Indigo 600 */
    --primary-dark: #4338ca;
    /* Indigo 700 */
    --primary-light: #818cf8;
    /* Indigo 400 */
    --secondary: #64748B;
    /* Slate 500 */
    --accent: #0EA5E9;
    /* Sky 500 */
    --success: #10B981;
    /* Emerald 500 */
    --danger: #EF4444;
    /* Red 500 */
    --warning: #F59E0B;
    /* Amber 500 */

    /* Backgrounds */
    --bg-body: #F8FAFC;
    /* Slate 50 */
    --bg-card: #ffffff;
    --bg-input: #F1F5F9;
    /* Slate 100 */

    /* Text */
    --text-main: #0F172A;
    /* Slate 900 */
    --text-muted: #64748B;
    /* Slate 500 */
    --text-light: #94A3B8;
    /* Slate 400 */

    /* Borders & Shadows */
    --border-color: #E2E8F0;
    /* Slate 200 */
    --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);
    --radius-lg: 1rem;
    --radius-md: 0.5rem;
    --radius-sm: 0.375rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-main);
    font-weight: 700;
    line-height: 1.25;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

@media (max-width: 640px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Components: Card */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

/* Components: Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    gap: 0.5rem;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 6px 8px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--bg-body);
    border-color: var(--text-muted);
}

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

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

/* Components: Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-input);
    font-size: 1rem;
    color: var(--text-main);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background-color: #fff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer & Credits */
.footer {
    margin-top: auto;
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
}

.credits {
    font-weight: 600;
    color: var(--primary);
    margin-top: 0.5rem;
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    background: rgba(79, 70, 229, 0.05);
}

/* Tabs (Modern Pill Style) */
.tab-container {
    background: var(--bg-input);
    padding: 0.5rem;
    border-radius: 9999px;
    /* Pill shape */
    display: inline-flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    position: relative;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background-color: white;
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Utilities */
.text-center {
    text-align: center;
}

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

.mt-4 {
    margin-top: 1rem;
}


.mb-4 {
    margin-bottom: 1rem;
}

/* Responsive Visibility */
.hidden-mobile {
    display: flex !important;
}

.hidden-desktop {
    display: none !important;
}


@media (max-width: 640px) {
    .hidden-mobile {
        display: none !important;
    }

    .hidden-desktop {
        display: flex !important;
    }
}

/* =========================================
   Added Missing Component Styles
   ========================================= */

/* Navbar */
.navbar {
    background: var(--bg-card);
    padding: 0.75rem 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary);
}

.navbar-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

/* Border accents for stat cards */
.stat-card-primary {
    border-left: 4px solid var(--primary);
}

.stat-card-success {
    border-left: 4px solid var(--success);
}

.stat-card-danger {
    border-left: 4px solid var(--danger);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Tables */
.table-container {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

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

th {
    background-color: var(--bg-input);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    color: var(--text-main);
    font-size: 0.95rem;
}

tr:hover {
    background-color: var(--bg-body);
}

/* Badges */
.badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-success {
    background: #DCFCE7;
    color: #166534;
}

.badge-danger {
    background: #FEE2E2;
    color: #991B1B;
}

.badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

/* Dashboard Card Headers */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.card-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}