/**
 * TEK Evolutions - Main Stylesheet
 * Design system completo per il sito
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Colors */
    --color-primary: #0066cc;
    --color-primary-dark: #004d99;
    --color-primary-light: #3399ff;
    --color-secondary: #00a8e8;
    --color-accent: #ff6b35;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    
    /* Neutrals */
    --color-dark: #1a1a2e;
    --color-gray-dark: #4a4a5a;
    --color-gray: #6c757d;
    --color-gray-light: #e9ecef;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: 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);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul, ol {
    list-style: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-primary);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ============================================
   HEADER
   ============================================ */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--container-padding);
    max-width: var(--container-max);
    margin: 0 auto;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--color-dark);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
    background: var(--color-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lang-switch {
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
}

.cart-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
    color: var(--color-dark);
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-dark);
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-main {
        gap: var(--spacing-md);
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

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

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

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

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

.btn-cart {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
    width: 100%;
}

.btn-cart:hover {
    background: #e55a2b;
    border-color: #e55a2b;
    color: var(--color-white);
}

.btn-cart-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
    width: 100%;
}

/* ============================================
   PRODUCT CARDS
   ============================================ */
.product-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-light);
}

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

.product-brand {
    margin-bottom: var(--spacing-md);
}

.product-brand .brand-logo {
    height: 40px;
    width: auto;
    opacity: 0.8;
}

.product-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--color-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   COMPANY CARDS
   ============================================ */
.company-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-light);
}

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

.company-logo {
    margin-bottom: var(--spacing-md);
}

.company-logo img {
    height: 50px;
    width: auto;
}

.company-name {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.company-description {
    color: var(--color-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.company-categories {
    font-size: 0.85rem;
    color: var(--color-gray-dark);
}

.company-categories li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
}

.company-categories li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ============================================
   SECTOR CARDS
   ============================================ */
.sector-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.sector-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

.sector-image {
    position: relative;
    height: 250px;
}

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

.sector-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 102, 204, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.sector-card:hover .sector-overlay {
    opacity: 1;
}

.sector-overlay i {
    font-size: 3rem;
    color: var(--color-white);
}

.sector-content {
    padding: var(--spacing-lg);
    background: var(--color-white);
}

.sector-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.sector-description {
    color: var(--color-gray);
    font-size: 0.9rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

.footer-logo img {
    height: 50px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-logo p {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.875rem;
    opacity: 0.7;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none !important; }
.visible { display: block !important; }

/* Loading Spinner */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-light);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}
/* ============================================
   PRODUCT SHOP SECTION (integrated in product detail)
   ============================================ */
.product-shop-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--color-gray-light);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.product-price-large {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.product-price-large .price-old {
    text-decoration: line-through;
    color: var(--color-gray);
    font-size: 1.25rem;
    margin-right: var(--spacing-md);
}

.product-price-large .price-new {
    color: #28a745;
}

.product-price-large .price-current {
    color: var(--color-primary);
}

.product-price-large .price-ask {
    font-size: 1.5rem;
    color: var(--color-secondary);
    font-weight: 600;
}

.stock-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.stock-info.available {
    background: #d4edda;
    color: #155724;
}

.stock-info.low-stock {
    background: #fff3cd;
    color: #856404;
}

.stock-info.out-of-stock {
    background: #f8d7da;
    color: #721c24;
}

.stock-info i {
    font-size: 1.1rem;
}

.warranty-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-lg);
}

.warranty-info i {
    color: #17a2b8;
}

.product-actions {
    margin-top: var(--spacing-lg);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.quantity-selector label {
    font-weight: 500;
    color: var(--color-dark);
}

.qty-controls {
    display: flex;
    align-items: center;
    border: 1px solid var(--color-gray-light);
    border-radius: 8px;
    overflow: hidden;
}

.qty-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--color-gray-light);
    cursor: pointer;
    font-size: 1.25rem;
    transition: background var(--transition-fast);
}

.qty-btn:hover {
    background: var(--color-gray);
}

.qty-input {
    width: 60px;
    height: 40px;
    border: none;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    -moz-appearance: textfield;
}

.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.btn-cart-large {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-cart-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-cart-large i {
    font-size: 1.2rem;
}

.out-of-stock-msg {
    display: block;
    padding: var(--spacing-md);
    background: #f8d7da;
    color: #721c24;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

/* Responsive adjustments for product shop section */
@media (max-width: 768px) {
    .product-shop-section {
        padding: var(--spacing-lg);
    }
    
    .product-price-large {
        font-size: 1.5rem;
    }
    
    .quantity-selector {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* IVA esclusa badge - visible on all pages */
.iva-excluded {
    display: inline !important;
    font-size: 0.8em !important;
    color: #64748b !important;
    font-weight: 500 !important;
    margin-left: 4px !important;
    white-space: nowrap !important;
}