:root {
    --primary-color: #4361ee;
    --secondary-color: #6b7280;
    --background-color: #f9fafb;
    --panel-color: #ffffff;
    --text-color: #1f2937;
    --error-color: #ef4444;
    --success-color: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.panel {
    background-color: var(--panel-color);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: transform 0.2s ease;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
    background-color: #3a5bd9;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-icon {
    margin-right: 0.5rem;
}

.status-message {
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: none;
}

.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Navbar Styles */
.navbar {
    background-color: var(--panel-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: 2rem;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    margin: 0 auto;
}

.brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.brand i {
    margin-right: 0.5rem;
}

.nav-tabs {
    display: flex;
    gap: 0.5rem;
}

.nav-tab {
    text-decoration: none;
    color: var(--secondary-color);
    padding: 0.5rem 1rem;
    border-bottom: 2px solid transparent;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-tab:hover {
    color: var(--primary-color);
}

.nav-tab.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

/* Table Styles */
.table-container {
    overflow-x: auto;
}

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

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    font-weight: 600;
    color: var(--secondary-color);
    background-color: #f9fafb;
}

tr:hover {
    background-color: #f9fafb;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-primary {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.action-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    margin-right: 0.5rem;
}

.action-btn:hover {
    color: #3a5bd9;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

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

input, textarea, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.1);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

/* Grid layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--panel-color);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: #f9fafb;
    border-top: 1px solid #e5e7eb;
}

/* Responsive utilities */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .panel {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .nav-tabs {
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
}