/* Estilos Gerais - Módulo de Planejamento Operacional Mineracore */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: #0b1120;
    color: #e2e8f0;
    line-height: 1.5;
    padding: 24px;
    min-height: 100vh;
}

header {
    max-width: 1400px;
    margin: 0 auto 20px auto;
    padding-bottom: 12px;
    border-bottom: 1px solid #1e293b;
}

header h1 {
    color: #38bdf8;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

header p {
    color: #94a3b8;
    font-size: 0.95rem;
}

main {
    width: 100%;
}

.container-form {
    background-color: #1e293b;
    padding: 28px;
    border-radius: 14px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.container-form h2 {
    color: #f8fafc;
    margin-bottom: 20px;
    font-size: 1.35rem;
    font-weight: 600;
    border-bottom: 2px solid #334155;
    padding-bottom: 10px;
}

/* Form em Grid de 2 Colunas */
form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

/* Ocupação de Largura Completa (Bloco 0 - Identificação, Bloco 4 - Manutenção, Bloco 5 - Chuvas e Botão) */
form fieldset:nth-of-type(1),
form fieldset:nth-of-type(5),
form fieldset:nth-of-type(6),
.btn-calcular {
    grid-column: span 2;
}

fieldset {
    border: 1px solid #334155;
    border-radius: 10px;
    padding: 20px;
    background-color: #0f172a;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-width: 0;
}

fieldset:hover {
    border-color: #475569;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

legend {
    color: #38bdf8;
    font-weight: 600;
    font-size: 1rem;
    padding: 0 8px;
    background-color: #0f172a;
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #cbd5e1;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input, 
.form-group select {
    width: 100%;
    padding: 9px 12px;
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 6px;
    color: #f8fafc;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.form-group input:focus, 
.form-group select:focus {
    outline: none;
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
    background-color: #0f172a;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.sub-legend {
    color: #f1f5f9;
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: 16px;
    margin-bottom: 4px;
}

.info-text {
    color: #94a3b8;
    font-size: 0.82rem;
    margin-bottom: 14px;
}

/* Grid de Paradas Operacionais Ajustado */
.paradas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.parada-item label {
    display: block;
    margin-bottom: 4px;
    color: #cbd5e1;
    font-size: 0.82rem;
}

.parada-item input {
    width: 100%;
    padding: 8px 10px;
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 6px;
    color: #f8fafc;
    font-size: 0.9rem;
}

.parada-item input:focus {
    outline: none;
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

/* Grid das Horas de Manutenção e Chuva (6 Colunas x 2 Linhas) */
.form-row-meses {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
}

.mes-input {
    background-color: #1e293b;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #334155;
    text-align: center;
    transition: border-color 0.2s ease;
}

.mes-input:hover {
    border-color: #38bdf8;
}

.mes-input label {
    display: block;
    font-size: 0.8rem;
    color: #94a3b8;
    margin-bottom: 4px;
}

.mes-input input {
    width: 100%;
    padding: 5px;
    background-color: #0f172a;
    border: 1px solid #475569;
    border-radius: 4px;
    color: #38bdf8;
    font-weight: 600;
    text-align: center;
    font-size: 0.9rem;
}

.mes-input input:focus {
    outline: none;
    border-color: #38bdf8;
}

/* Botão Principal de Ação */
.btn-calcular {
    display: block;
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
    margin-top: 10px;
}

.btn-calcular:hover {
    background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
    transform: translateY(-1px);
}

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

/* Responsividade para Telas Menores */
@media (max-width: 1024px) {
    .form-row-meses {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 850px) {
    form {
        grid-template-columns: 1fr;
    }
    
    form fieldset:nth-of-type(1),
    form fieldset:nth-of-type(5),
    form fieldset:nth-of-type(6),
    .btn-calcular {
        grid-column: span 1;
    }
    
    .form-row-meses {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .form-row-meses {
        grid-template-columns: repeat(2, 1fr);
    }
}