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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --success-color: #16a34a;
    --warning-color: #ea580c;
    --danger-color: #dc2626;
    --info-color: #0284c7;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --text-color: #333;
    --bg-color: #f9fafb;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 3rem 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

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

main {
    padding: 2rem 1rem;
    min-height: calc(100vh - 200px);
}

.card {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
    font-weight: 600;
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
    font-weight: 600;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
}

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

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    display: inline-block;
    text-decoration: none;
}

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

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

.btn-secondary {
    background-color: var(--gray-300);
    color: var(--gray-900);
}

.btn-secondary:hover {
    background-color: var(--gray-400);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

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

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

.table thead {
    background-color: var(--gray-50);
    border-bottom: 2px solid var(--border-color);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--gray-900);
}

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

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

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

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

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.filter-group {
    display: flex;
    gap: 0.5rem;
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.95rem;
    cursor: pointer;
}

.empty-state {
    text-align: center;
    color: var(--gray-500);
    padding: 2rem !important;
}

.info-box {
    background-color: #eff6ff;
    border-left: 4px solid var(--info-color);
}

.info-box ul {
    list-style: none;
    padding-left: 0;
}

.info-box li {
    padding: 0.5rem 0;
    color: var(--gray-700);
    padding-left: 1.5rem;
    position: relative;
}

.info-box li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

footer {
    background-color: var(--gray-100);
    padding: 2rem;
    text-align: center;
    color: var(--gray-600);
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 0.5rem;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.close {
    font-size: 2rem;
    font-weight: bold;
    color: var(--gray-500);
    cursor: pointer;
    transition: color 0.2s ease;
}

.close:hover {
    color: var(--gray-900);
}

.modal-footer {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Loading indicator */
.loading {
    text-align: center;
    padding: 2rem;
    color: var(--gray-600);
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Alert messages */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border-color: var(--success-color);
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border-color: var(--danger-color);
}

.alert-info {
    background-color: #eff6ff;
    color: #0c4a6e;
    border-color: var(--info-color);
}

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

.stat-card {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    color: var(--primary-color);
}

.stat-content p {
    margin: 0;
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-xl);
    border-left: 4px solid;
    min-width: 300px;
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.toast-success {
    border-color: var(--success-color);
}

.toast.toast-error {
    border-color: var(--danger-color);
}

.toast.toast-info {
    border-color: var(--info-color);
}

.toast.toast-warning {
    border-color: var(--warning-color);
}

.toast-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.toast-message {
    flex: 1;
    color: var(--gray-800);
    font-size: 0.95rem;
}

.toast-close {
    cursor: pointer;
    color: var(--gray-400);
    font-size: 1.25rem;
    line-height: 1;
    transition: color 0.2s ease;
}

.toast-close:hover {
    color: var(--gray-700);
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
        flex-direction: column;
    }

    .header-actions .btn,
    .header-actions .filter-select {
        width: 100%;
    }

    .table {
        font-size: 0.9rem;
        display: block;
        overflow-x: auto;
    }

    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-buttons .btn {
        width: 100%;
    }

    .modal-content {
        width: 95%;
        margin: 20% auto;
    }

    .toast-container {
        right: 10px;
        left: 10px;
        top: 10px;
    }

    .toast {
        min-width: auto;
        max-width: none;
    }
}