/* ============================================
   A2 Motori Elettrici - CSS Moderno
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #1a5276;
    --color-primary-dark: #0e3a52;
    --color-primary-light: #2980b9;
    --color-accent: #e67e22;
    --color-accent-dark: #d35400;
    --color-dark: #1a1a2e;
    --color-gray-900: #212529;
    --color-gray-800: #343a40;
    --color-gray-700: #495057;
    --color-gray-600: #6c757d;
    --color-gray-500: #adb5bd;
    --color-gray-400: #ced4da;
    --color-gray-300: #dee2e6;
    --color-gray-200: #e9ecef;
    --color-gray-100: #f8f9fa;
    --color-white: #ffffff;
    
    /* Typography */
    --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Other */
    --container-max: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --header-height: 72px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-gray-800);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul {
    list-style: none;
}

address {
    font-style: normal;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: 1000;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
    outline: 2px solid var(--color-accent);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Section */
.section {
    padding: var(--space-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary-light);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.25;
    margin-bottom: var(--space-lg);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

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

.btn--outline {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

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

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

.btn--light:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--full {
    width: 100%;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    padding: var(--space-sm) 0;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
    transform: scaleX(1);
}

.nav__link--cta {
    background: var(--color-primary);
    color: var(--color-white) !important;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--border-radius);
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle__line {
    width: 100%;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ============================================
   HERO
   ============================================ */

.hero {
    padding-top: calc(var(--header-height) + var(--space-4xl));
    padding-bottom: var(--space-4xl);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero__description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    opacity: 0.9;
    max-width: 520px;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero__image {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   FEATURES
   ============================================ */

.features {
    padding: var(--space-3xl) 0;
    margin-top: calc(-1 * var(--space-2xl));
    position: relative;
    z-index: 10;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* ============================================
   ABOUT / CHI SIAMO
   ============================================ */

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

.about__grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about__content p {
    margin-bottom: var(--space-lg);
    color: var(--color-gray-700);
}

.about__image {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   PRODUCTS
   ============================================ */

.products {
    background: var(--color-gray-100);
}

.products__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.product-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-card__content {
    padding: var(--space-lg);
}

.product-card__content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.product-card__content p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* ============================================
   INDUSTRIES
   ============================================ */

.industries {
    background: var(--color-primary-dark);
    color: var(--color-white);
    padding: var(--space-3xl) 0;
}

.industries .section-label {
    color: var(--color-accent);
}

.industries .section-title {
    color: var(--color-white);
}

.industries__grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}

.industry-tag {
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
}

.industry-tag:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ============================================
   PRODUCTION / PROCESS
   ============================================ */

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

.production__steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--space-xl);
    align-items: flex-start;
    padding: var(--space-xl);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-base);
}

.step:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.step__number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-lg);
    font-weight: 800;
    border-radius: 50%;
}

.step h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.step p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta-section {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-section__content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.cta-section p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.cta-section .btn {
    font-size: var(--font-size-lg);
    padding: 1rem 2.5rem;
}

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */

.page-header {
    padding-top: calc(var(--header-height) + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
    text-align: center;
}

.breadcrumb {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    margin-bottom: var(--space-md);
}

.breadcrumb a {
    color: var(--color-white);
    opacity: 0.8;
}

.breadcrumb a:hover {
    opacity: 1;
}

.page-header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.page-header p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   CONTACT PAGE
   ============================================ */

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.contact__info h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-md);
}

.contact__info > p {
    color: var(--color-gray-600);
    margin-bottom: var(--space-xl);
}

.contact-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.contact-item:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.contact-item__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius);
}

.contact-item__content h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
}

.contact-item__content p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.contact-item__content a.link {
    display: inline-block;
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
    font-weight: 500;
}

.contact-form-wrapper h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-xl);
}

/* Form */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem var(--space-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-gray-800);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(41, 128, 185, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group--checkbox label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
    font-weight: 400;
}

.form-group--checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--color-primary);
}

/* Map */
.map-section {
    width: 100%;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--color-dark);
    color: var(--color-gray-400);
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 0.8fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__col h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.footer__col p {
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

.footer__col address p {
    margin-bottom: var(--space-sm);
}

.footer__address a {
    color: var(--color-gray-400);
}

.footer__address a:hover {
    color: var(--color-white);
}

.footer__nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__nav a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer__nav a:hover {
    color: var(--color-white);
    padding-left: 5px;
}

.footer__bottom {
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
}

/* ============================================
   LINK
   ============================================ */

.link {
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about__content {
        order: 1;
    }
    
    .about__image {
        order: 2;
    }
    
    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-4xl: 4rem;
        --space-3xl: 3rem;
    }
    
    /* Nav toggle */
    .nav-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-white);
        padding: var(--space-xl);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
    }
    
    .nav.open {
        transform: translateX(0);
    }
    
    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    
    .nav__link {
        padding: var(--space-md) 0;
        font-size: var(--font-size-lg);
        border-bottom: 1px solid var(--color-gray-200);
    }
    
    .nav__link::after {
        display: none;
    }
    
    .nav__link--cta {
        text-align: center;
        margin-top: var(--space-md);
        border-radius: var(--border-radius);
    }
    
    /* Hero */
    .hero {
        padding-top: calc(var(--header-height) + var(--space-3xl));
    }
    
    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    .hero__description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__actions {
        justify-content: center;
    }
    
    .hero__image {
        max-width: 400px;
        margin: 0 auto;
    }
    
    /* Features */
    .features__grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    /* Products */
    .products__grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact__grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer__grid {
        grid-template-columns: 1fr;
    }
    
    /* Page header */
    .page-header h1 {
        font-size: var(--font-size-3xl);
    }
    
    /* Section titles */
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    /* Steps */
    .step {
        flex-direction: column;
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero h1 {
        font-size: var(--font-size-2xl);
    }
    
    .hero__actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .cta-section .btn {
        width: auto;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print */
@media print {
    .header,
    .nav-toggle,
    .footer,
    .hero__image {
        display: none;
    }
    
    .hero {
        background: none;
        color: var(--color-dark);
        padding-top: var(--space-xl);
    }
    
    .section {
        padding: var(--space-xl) 0;
    }
}