/* ========== Global Styles ========== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #111827;
    --light: #f8fafc;
    --border: #e2e8f0;
    --shadow: rgba(15, 23, 42, 0.08);
    --shadow-md: rgba(15, 23, 42, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--light);
    color: #1f2937;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== Navigation ========== */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    background: var(--dark);
    color: #fff;
    box-shadow: 0 2px 8px var(--shadow);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.logo {
    font-weight: 700;
    font-size: 22px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo i {
    color: var(--primary);
}

.logo span {
    color: var(--primary);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 4px;
    margin: 0;
}

.nav-links a {
    color: #e5e7eb;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.nav-links a.active {
    background: var(--primary);
    color: #ffffff;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-details {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
}

.user-role {
    font-size: 12px;
    color: #9ca3af;
}

.btn-logout {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* ========== Main Container ========== */
.page-container {
    padding: 32px 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    flex: 1;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

/* ========== Cards ========== */
.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 16px var(--shadow);
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 8px 20px var(--shadow-md);
}

.stat-card.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-card.danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-card.secondary {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.stat-label {
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
}

/* ========== Tables ========== */
.table-container {
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 14px 12px;
    text-align: left;
    font-size: 14px;
}

.data-table thead {
    background: #f8fafc;
    border-bottom: 2px solid var(--border);
}

.data-table th {
    font-weight: 600;
    color: var(--dark);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

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

/* ========== Buttons ========== */
.btn,
.btn-primary,
.btn-secondary,
.btn-success,
.btn-warning,
.btn-danger,
.btn-small {
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn,
.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn:hover,
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: #e5e7eb;
    color: #1f2937;
}

.btn-secondary:hover {
    background: #d1d5db;
}

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

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

.btn-warning {
    background: var(--warning);
    color: #fff;
}

.btn-warning:hover {
    background: #d97706;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

/* ========== Badges ========== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-primary {
    background: #dbeafe;
    color: #1e40af;
}

.badge-secondary {
    background: #f1f5f9;
    color: #475569;
}

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

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: var(--dark);
}

.form-control,
.form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

/* ========== Modal ========== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal.open {
    display: flex;
}

.modal-content {
    background: #fff;
    padding: 28px;
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #6b7280;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: #f3f4f6;
    color: var(--dark);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* ========== Login Page ========== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 20px;
}

.login-box {
    background: white;
    padding: 48px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 440px;
}

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

.login-logo i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 12px;
}

.login-logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

.login-logo p {
    color: #6b7280;
    font-size: 14px;
    margin-top: 8px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

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

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

/* ========== Footer ========== */
.page-footer {
    background: var(--dark);
    color: #9ca3af;
    padding: 20px 24px;
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.footer-version {
    color: #6b7280;
}

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

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .top-nav {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 16px;
    }

    .nav-links {
        width: 100%;
        order: 3;
        margin-top: 12px;
        overflow-x: auto;
    }

    .page-container {
        padding: 20px 16px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

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

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

    .modal-content {
        margin: 20px;
        padding: 20px;
    }

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

/* ========== Loading Spinner ========== */
.spinner {
    border: 3px solid #f3f4f6;
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}