:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --danger-color: #EF4444;
    --success-color: #10B981;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-900);
    background-color: var(--gray-50);
    padding: 2rem 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.header {
    background: white;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header h1 {
    color: var(--gray-900);
    font-size: 2rem;
    font-weight: 700;
}

.header-nav {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

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

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

.btn-secondary {
    background-color: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background-color: var(--gray-50);
}

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

.btn-danger:hover {
    background-color: #DC2626;
}

/* Filter Form */
.filter-card {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

.filter-form {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 150px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.375rem;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.95rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    background-color: white;
    transition: all 0.2s;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Table */
.table-card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-wrapper {
    overflow-x: auto;
}

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

thead {
    background-color: var(--gray-100);
}

th {
    padding: 1rem;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

td {
    padding: 1rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.95rem;
    color: var(--gray-800);
}

tbody tr:hover {
    background-color: var(--gray-50);
}

td a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

td a:hover {
    text-decoration: underline;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 0.375rem;
}

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
}

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

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

.badge-info {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.badge-secondary {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

/* Detail View */
.detail-card {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

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

.detail-item {
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
}

.detail-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 0.25rem;
}

.detail-value {
    font-size: 1rem;
    color: var(--gray-900);
}

.detail-actions {
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-100);
    flex-wrap: wrap;
}

/* Form */
.form-card {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    max-width: 800px;
}

.form-card h1 {
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.form-row {
    margin-bottom: 1.25rem;
}

.form-row label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-row input[type="text"],
.form-row input[type="number"],
.form-row input[type="email"],
.form-row input[type="datetime-local"],
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 0.75rem;
    font-size: 0.95rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-row input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--gray-100);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 0.75rem;
    margin-top: 1.5rem;
    box-shadow: var(--shadow);
}

.pagination a {
    padding: 0.5rem 1rem;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.pagination a:hover {
    background-color: var(--gray-100);
}

.pagination span {
    color: var(--gray-600);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-600);
}

.empty-state svg {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    opacity: 0.3;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .filter-form {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-group {
        width: 100%;
    }
    
    table {
        font-size: 0.875rem;
    }
    
    th, td {
        padding: 0.75rem 0.5rem;
    }
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    padding: 2rem 1rem;
}

.login-card {
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
}

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

.login-header h1 {
    color: var(--gray-900);
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--gray-600);
    font-size: 1rem;
}

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

.login-form .form-group {
    margin-bottom: 1.25rem;
}

.login-form .form-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 0.75rem;
    transition: all 0.2s;
    background-color: var(--gray-50);
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-full {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.login-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-danger {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.form-error {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.text-muted {
    color: var(--gray-600);
}

.text-small {
    font-size: 0.875rem;
}