/* --- ESTILOS ESPECÍFICOS PORCENTAGEM --- */
:root {
    /* --cor-primaria: #2563eb;
    --cor-secundaria: #16a34a;
    --cor-fundo: #f1f5f9;
    --cor-card: #ffffff;
    --cor-texto: #1f2933;
    --cor-texto-suave: #64748b; */
    --cor-primaria: #16a34a;
    --cor-primaria-dark: #15803d;
    --cor-secundaria: #64748b;
    --cor-fundo: #f0fdf4;
    /* Fundo verde muito claro */
    --cor-card: #ffffff;
    --cor-texto: #1e293b;
    --cor-texto-suave: #64748b;
    --cor-borda: #bbf7d0;
    --sombra: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
    --cor-fundo: #0f172a;
    --cor-card: #1e293b;
    --cor-texto: #e2e8f0;
    --cor-texto-suave: #94a3b8;
}

body {
    background-color: var(--cor-fundo);
    color: var(--cor-texto);
    /* padding-bottom: 40px; */
}

.calculator-wrapper {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Card Principal */
.calc-card {
    background-color: var(--cor-card);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.calc-header {
    text-align: center;
    margin-bottom: 30px;
}

.calc-header h2 {
    font-size: 26px;
    margin-bottom: 8px;
    color: var(--cor-texto);
}

/* Inputs e Select */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--cor-texto);
    font-size: 14px;
}

.input-wrapper {
    position: relative;
}

input,
select {
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    font-size: 16px;
    background-color: var(--cor-fundo);
    color: var(--cor-texto);
    transition: all 0.2s;
    outline: none;
    appearance: none;
    /* Remove estilo padrão do select */
}

/* Custom Arrow for Select */
.select-wrapper::after {
    content: '▼';
    font-size: 12px;
    color: var(--cor-texto-suave);
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

input:focus,
select:focus {
    border-color: var(--cor-primaria);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Grid de Inputs */
.inputs-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 20px;
}

/* Botões */
.btn-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

button {
    padding: 14px;
    border-radius: 8px;
    border: none;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--cor-primaria);
    color: white;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #cbd5e1;
    color: var(--cor-texto-suave);
}

.btn-secondary:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--cor-texto);
    border-color: #94a3b8;
}

/* Área de Resultado */
.result-area {
    display: none;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
    text-align: center;
}

.result-card {
    background: rgba(37, 99, 235, 0.05);
    border: 1px solid rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    padding: 24px;
}

.result-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--cor-primaria);
    line-height: 1.2;
    margin-bottom: 8px;
}

.result-desc {
    color: var(--cor-texto-suave);
    font-size: 16px;
    margin-bottom: 20px;
}

/* Caixa de Passo a Passo (Matemática) */
.steps-box {
    background: #f8fafc;
    padding: 16px;
    border-radius: 8px;
    text-align: left;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    color: var(--cor-texto-suave);
    border-left: 4px solid var(--cor-secundaria);
    margin-top: 10px;
}

/* Conteúdo Informativo */
.info-content h3 {
    margin-top: 30px;
    color: var(--cor-texto);
    font-size: 20px;
}

.formula-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.formula-card {
    background: var(--cor-card);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.formula-title {
    font-weight: 700;
    color: var(--cor-primaria);
    margin-bottom: 8px;
}

.formula-math {
    background: rgba(0, 0, 0, 0.05);
    padding: 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 14px;
    margin-bottom: 8px;
}

.example-box {
    background: rgba(245, 158, 11, 0.1);
    padding: 20px;
    border-left: 4px solid #f59e0b;
    border-radius: 8px;
    margin-top: 20px;
}

.example-box h4 {
    margin-top: 0;
    color: #92400e;
}

/* Mobile */
@media (max-width: 600px) {
    .inputs-grid {
        grid-template-columns: 1fr;
    }

    .btn-container {
        grid-template-columns: 1fr;
    }

    .result-value {
        font-size: 28px;
    }
}

.info-card {
    background: var(--cor-card);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--sombra);
    border: 1px solid var(--cor-borda);
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid var(--cor-borda);
}

details {
    padding: 15px 0;
    cursor: pointer;
}

summary {
    font-weight: 600;
    color: var(--cor-texto);
    list-style: none;
    display: flex;
    justify-content: space-between;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--cor-primaria);
}

details[open] summary::after {
    content: '-';
}

details p {
    margin-top: 10px;
    font-size: 0.95rem;
    color: var(--cor-texto-suave);
}

/* Conteúdo Educativo */
.info-card h3 {
    margin-bottom: 15px;
    color: var(--cor-texto);
    font-size: 1.4rem;
}

.info-card p,
.info-card li {
    color: var(--cor-texto-suave);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

/* Tips Box */
.tip-box {
    background: rgba(22, 163, 74, 0.1);
    border-left: 4px solid #16a34a;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}

.tip-box h4 {
    margin: 0 0 5px 0;
    color: #14532d;
    font-size: 0.95rem;
    font-weight: 700;
}

.tip-box p {
    margin: 0;
    font-size: 0.85rem;
    color: #166534;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid var(--cor-borda);
}

details {
    padding: 15px 0;
    cursor: pointer;
}

summary {
    font-weight: 600;
    color: var(--cor-texto);
    list-style: none;
    display: flex;
    justify-content: space-between;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--cor-primaria);
}

details[open] summary::after {
    content: '-';
}

details p {
    margin-top: 10px;
    font-size: 0.95rem;
    color: var(--cor-texto-suave);
}

/* Links Externos */
.link-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-top: 20px;
}

.link-card {
    display: flex;
    align-items: center;
    padding: 15px;
    background: var(--cor-fundo);
    border: 1px solid var(--cor-borda);
    border-radius: 8px;
    text-decoration: none;
    color: var(--cor-texto);
    transition: transform 0.2s, box-shadow 0.2s;
}

.link-card:hover {
    transform: translateY(-2px);
    border-color: var(--cor-primaria);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.link-icon {
    font-size: 24px;
    margin-right: 15px;
    color: var(--cor-primaria);
}

.link-title {
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
}

.link-desc {
    font-size: 0.85rem;
    color: var(--cor-texto-suave);
}