/* Variables Globales de Diseño */
:root {
    --primary-color: #f39c12;    /* Amarillo industrial */
    --secondary-color: #2c3e50;  /* Gris azulado oscuro corporativo */
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f9f9f9;
    --white: #ffffff;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --border-radius: 6px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Roboto', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding {
    padding: 60px 0;
}

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

/* Encabezado */
.main-header {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
}

.nav a {
    color: var(--white);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--primary-color);
}

.btn-nav {
    background-color: var(--primary-color);
    padding: 8px 15px;
    border-radius: var(--border-radius);
    color: var(--secondary-color) !important;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.85), rgba(44, 62, 80, 0.85)), url('https://unsplash.com') no-repeat center center/cover;
    color: var(--white);
    padding: 100px 0;
    text-align: center;
}

.hero h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 30px auto;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: 12px 30px;
    text-decoration: none;
    font-weight: 700;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: inline-block;
}

.btn-primary:hover {
    background-color: var(--white);
    transform: translateY(-2px);
}

/* Sección Productos */
.section-title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    position: relative;
    color: var(--secondary-color);
}

.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.product-card {
    background: var(--white);
    border: 1px solid #e1e1e1;
    border-radius: var(--border-radius);
    padding: 30px;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: 3px 10px;
    font-size: 12px;
    font-weight: bold;
    border-radius: 20px;
}

.product-card h3 {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.product-desc {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 15px;
}

.product-features {
    list-style: none;
    margin-bottom: 25px;
    flex-grow: 1;
}

.product-features li {
    margin-bottom: 8px;
    font-size: 14px;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
    text-align: center;
    padding: 10px;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Formulario */
.form-container {
    max-width: 800px;
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.form-subtitle {
    text-align: center;
    margin-top: -30px;
    margin-bottom: 30px;
    color: var(--text-light);
}

.main-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #cccccc;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(243, 156, 18, 0.3);
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--error-color);
    background-color: #fdf2f2;
}

.btn-submit {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 700;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

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

/* Alertas de respuesta */
.alert {
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-size: 15px;
}
.alert-danger {
    background-color: #fde8e8;
    color: var(--error-color);
    border: 1px solid #f8b4b4;
}
.alert-success {
    background-color: #def7ec;
    color: var(--success-color);
    border: 1px solid #bcf0da;
}

/* Pie de Página */
.main-footer {
    background-color: var(--secondary-color);
    color: #a0aec0;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
}

/* Media Queries para Responsive Design (Escritorio) */
@media (min-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .main-form {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .full-width {
        grid-column: span 2;
    }
    
    .hero h2 {
        font-size: 48px;
    }
}