/* CSS Variables for Light/Dark Mode */
:root[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --success-color: #198754;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

:root[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --success-color: #198754;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Navbar */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    box-shadow: var(--shadow);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.navbar-brand h2 {
    color: var(--primary-color);
    font-size: 1.25rem;
    white-space: nowrap;
}

.navbar-menu {
    display: flex;
    gap: 0.25rem;
    flex: 1;
    flex-wrap: wrap;
    align-items: center;
}

.navbar-menu a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    font-size: 0.85rem;
    white-space: nowrap;
}

.navbar-menu a:hover {
    background-color: var(--bg-secondary);
}

.nav-messages {
    position: relative;
}

.nav-badge {
    position: absolute;
    top: -5px;
    right: -10px;
    background: #e74c3c;
    color: white;
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 10px;
    font-weight: bold;
    min-width: 16px;
    text-align: center;
}

.navbar-end {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.navbar-user {
    color: var(--text-secondary);
    font-size: 0.8rem;
    white-space: nowrap;
}

/* Responsive navbar */
@media (max-width: 1200px) {
    .navbar-container {
        gap: 0.5rem;
    }
    .navbar-menu a {
        padding: 0.35rem 0.5rem;
        font-size: 0.8rem;
    }
    .navbar-user {
        font-size: 0.75rem;
    }
}

@media (max-width: 900px) {
    .navbar-container {
        flex-direction: column;
        align-items: flex-start;
    }
    .navbar-menu {
        width: 100%;
        justify-content: flex-start;
    }
    .navbar-end {
        width: 100%;
        justify-content: flex-end;
        padding-top: 0.5rem;
        border-top: 1px solid var(--border-color);
        margin-top: 0.5rem;
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    min-height: calc(100vh - 200px);
}

/* Auth Page */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, #563d7c 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.auth-card {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

.auth-card h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.auth-links {
    text-align: center;
    margin-top: 1rem;
}

.auth-links a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Forms */
.form {
    width: 100%;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-icon {
    padding: 0.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
    border: 1px solid #badbcc;
}

.alert-error {
    background-color: #f8d7da;
    color: #842029;
    border: 1px solid #f5c2c7;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

/* Cards */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table thead {
    background-color: var(--bg-secondary);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.table tbody tr:hover {
    background-color: var(--bg-secondary);
}

/* Dashboard */
.dashboard h1 {
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.dashboard-section {
    margin-bottom: 2rem;
}

.dashboard-section h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.dashboard-actions {
    margin-top: 2rem;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

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

.badge-warning {
    background-color: var(--warning-color);
    color: #000;
}

.badge-error {
    background-color: var(--error-color);
    color: white;
}

/* Footer */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-container {
        flex-direction: column;
        gap: 1rem;
    }

    .navbar-menu {
        flex-direction: column;
        width: 100%;
    }

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

    .table {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }
}