/* === Estilos gerais === */
:root {
    --primary: #9ca3af;      /* Prata */
    --secondary: #1f2937;    /* Grafite */
    --accent: #3b82f6;       /* Azul aço */
    --light: #f3f4f6;
    --dark: #0f172a;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light);
    font-size: 16px;
}

/* Container principal */
.main-container {
    background-color: #ffffff;
    max-width: 700px;
    margin: 30px auto;
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid #e5e7eb;
}

/* Container do formulário */
.form-container {
    background-color: #f9fafb;
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid #e5e7eb;
}

/* Logo centralizada */
.logo {
    display: block;
    margin: 0 auto 15px auto;
    max-width: 150px;
}

/* Título principal */
.main-title {
    text-align: center;
    color: var(--secondary);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
}

/* Títulos dos campos */
.title-field {
    color: var(--secondary);
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

/* Campos do formulário */
.form-group {
    margin-bottom: 15px;
}

input[type="text"],
input[type="tel"],
select {
    width: 100%;
    padding: 12px;
    border: 1px solid #9ca3af;
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color 0.3s;
}

input:focus,
select:focus {
    border-color: var(--accent);
    outline: none;
}

/* Select custom */
select.form-control {
    appearance: none;
    background-color: #ffffff;
    color: #374151;
    cursor: pointer;
}

/* Botões */
.button-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
    justify-content: center;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 700;
    font-size: 14px;
    width: 100%;
    transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    transform: translateY(-1px);
}

/* Botões específicos */
button.btn-calcular {
    background-color: var(--secondary);
    color: #ffffff;
}

button.btn-calcular:hover {
    background-color: #374151;
}

button.btn-copiar,
button.btn-add {
    background-color: var(--primary);
    color: #111827;
}

button.btn-copiar:hover,
button.btn-add:hover {
    background-color: #bfc5cf;
}

button.btn-whatsapp {
    background-color: #22c55e;
    color: #ffffff;
}

button.btn-whatsapp:hover {
    background-color: #16a34a;
}

button.btn-limpar {
    background-color: #9ca3af;
    color: #111827;
}

button.btn-limpar:hover {
    background-color: #6b7280;
}

/* Resultados */
.result-box-container {
    background-color: #f8fafc;
    color: var(--secondary);
    padding: 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    border: 1px solid #c7cdd6;
    margin-top: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.result-box {
    list-style: none;
    padding: 0;
    margin: 0;
}

.result-box .list-group-item {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
}

.result-label {
    font-weight: 600;
    color: #6b7280;
}

.result-info {
    font-weight: 700;
    color: var(--dark);
}

/* Responsividade */
@media screen and (max-width: 768px) {
    .main-container,
    .form-container {
        padding: 15px;
    }

    .button-container {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}

/* Rodapé */
footer {
    text-align: center;
    padding: 12px 0;
    background-color: var(--secondary);
    color: #ffffff;
    font-size: 13px;
    margin-top: 20px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}