:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #64748b;
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 1.8rem;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Sections */
.section {
    padding: 40px 0;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border);
}

.card-header h2,
.card-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

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

.card-body {
    padding: 25px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
    font-size: 0.9rem;
}

.label-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 400;
    margin-top: 2px;
}

.input-readonly {
    background-color: var(--bg) !important;
    color: var(--primary) !important;
    font-weight: 600;
    cursor: default;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--card-bg);
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.form-group-small {
    flex: 0.6;
}

.form-group-xsmall {
    flex: 0.3;
}

.form-group-medium {
    flex: 0.8;
}

/* Map */
.map-container {
    margin-bottom: 20px;
}

.map-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
    font-size: 0.9rem;
}

.mapa {
    width: 100%;
    height: 350px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    z-index: 1;
}

.map-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

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

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--bg);
    font-weight: 600;
    color: var(--text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    color: var(--text);
}

.row-total {
    background: var(--primary) !important;
    color: white !important;
}

.row-total td {
    color: white !important;
    font-weight: 600;
}

input[type="number"] {
    -moz-appearance: textfield;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}

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

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

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

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

.actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

/* Resultados */
.resultado-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.resultado-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
}

.status-badge {
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.status-badge.viavel {
    background: var(--success-light);
    color: var(--success);
    border: 2px solid var(--success);
}

.status-badge.inviavel {
    background: var(--danger-light);
    color: var(--danger);
    border: 2px solid var(--danger);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.card-resultado {
    border-left: 4px solid var(--primary);
}

.resultado-item {
    text-align: center;
    padding: 20px;
}

.resultado-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

.resultado-valor {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

/* Chart */
.chart-container {
    position: relative;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Table Resultado */
.table-resultado {
    width: 100%;
}

.table-resultado th {
    background: var(--primary);
    color: white;
    text-transform: none;
}

.table-resultado tr:hover {
    background: var(--bg);
}

.table-resultado td:last-child {
    font-weight: 600;
    text-align: right;
}

.table-resultado td:nth-child(2) {
    text-align: center;
}

/* Regra Viabilidade */
.regra-viabilidade {
    padding: 20px;
    border-radius: var(--radius);
    line-height: 1.8;
}

.regra-viabilidade.viavel {
    background: var(--success-light);
    border: 1px solid var(--success);
}

.regra-viabilidade.inviavel {
    background: var(--danger-light);
    border: 1px solid var(--danger);
}

.regra-viabilidade h4 {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

/* Footer */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
    color: var(--text-light);
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav {
        gap: 15px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

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

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .resultado-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .actions {
        flex-direction: column;
    }

    .btn-lg {
        width: 100%;
        justify-content: center;
    }
}

/* Animações */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Utilitários */
.hidden {
    display: none !important;
}

.text-success {
    color: var(--success);
}

.text-danger {
    color: var(--danger);
}

.text-warning {
    color: var(--warning);
}