/**
 * TRESTINI FRUIT WEBSITE
 * Main CSS file with brand colors and responsive design
 * Inspired by Zanarini.com design
 */

/* ========================================================================
   CSS VARIABLES - BRAND COLORS
   ======================================================================== */
:root {
    /* Brand Colors */
    --verde-trestini: #A5C73B;  /* Verde mela - titoli, icone, elementi naturali */
    --rosso-brillante: #E5130E; /* CTA buttons, offerte speciali */
    --rosso-scuro: #A50800;     /* Titoli eleganti, sottolineature */
    --bianco: #FFFFFF;          /* Sfondi principali */
    --beige-chiaro: #FAE3B8;    /* Sfondi alternativi */
    --nero: #000000;            /* Testo principale */
    --grigio-scuro: #555555;    /* Testo secondario, bordi */
    --grigio-chiaro: #F8F8F8;   /* Sfondi sezioni */
    --grigio-medio: #CCCCCC;    /* Bordi input */
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    
    /* Header */
    --header-height: 80px;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--nero);
    background-color: var(--bianco);
    overflow-x: hidden;
}

/* ========================================================================
   TYPOGRAPHY
   ======================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    color: var(--rosso-scuro);
}

h3 {
    font-size: 1.8rem;
    color: var(--verde-trestini);
}

h4 {
    font-size: 1.4rem;
}

h5 {
    font-size: 1.2rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--grigio-scuro);
}

a {
    color: var(--verde-trestini);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--rosso-scuro);
}

strong {
    color: var(--nero);
}

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

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

.section-alt {
    background-color: var(--grigio-chiaro);
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* ========================================================================
   BUTTONS
   ======================================================================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.btn-primary {
    background-color: var(--rosso-brillante);
    color: var(--bianco);
}

.btn-primary:hover {
    background-color: var(--rosso-scuro);
    color: var(--bianco);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-secondary {
    background-color: var(--verde-trestini);
    color: var(--bianco);
}

.btn-secondary:hover {
    background-color: var(--rosso-scuro);
    color: var(--bianco);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-outline {
    background-color: transparent;
    color: var(--verde-trestini);
    border: 2px solid var(--verde-trestini);
}

.btn-outline:hover {
    background-color: var(--verde-trestini);
    color: var(--bianco);
}

/* ========================================================================
   HEADER & NAVIGATION
   ======================================================================== */
.header {
    background-color: var(--bianco);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.navbar {
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.navbar-brand .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    margin-right: var(--spacing-xs);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--verde-trestini);
}

.navbar-menu {
    display: flex;
    align-items: center;
}

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0 var(--spacing-sm);
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 16px;
    color: var(--nero);
    text-decoration: none;
    padding: 10px 0;
    position: relative;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--verde-trestini);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--verde-trestini);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    margin-left: var(--spacing-md);
    flex-wrap: wrap;
    gap: 4px;
}

.lang-link,
.lang-current {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 12px;
    margin: 0;
    border-radius: 6px;
    transition: var(--transition);
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.lang-link {
    color: var(--grigio-scuro);
    background-color: transparent;
    border: 1px solid var(--grigio-medio);
}

.lang-link:hover {
    color: var(--bianco);
    background-color: var(--verde-trestini);
    border-color: var(--verde-trestini);
}

.lang-current {
    color: var(--bianco);
    background-color: var(--verde-trestini);
    border: 1px solid var(--verde-trestini);
}

/* Mobile Navigation Toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    margin-left: var(--spacing-sm);
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: var(--nero);
    margin: 3px 0;
    transition: var(--transition);
}

/* ========================================================================
   HERO SECTION
   ======================================================================== */
.hero {
    min-height: 70vh;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    margin-top: var(--header-height);
    overflow: hidden;
    padding: var(--spacing-xl) 0;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    padding: 0 var(--spacing-sm);
    animation: fadeInUp 1s ease-out;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text {
    z-index: 2;
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--verde-trestini);
    line-height: 1.1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--nero);
    line-height: 1.5;
    font-weight: 400;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.hero-logo {
    width: 200px;
    height: 200px;
    opacity: 0.9;
    filter: drop-shadow(0 20px 40px rgba(165, 199, 59, 0.2));
    animation: float 6s ease-in-out infinite;
    margin: 0 auto;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-cta {
    margin-top: var(--spacing-lg);
}

/* ========================================================================
   SECTIONS
   ======================================================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-title {
    font-size: 2.5rem;
    color: var(--rosso-scuro);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--grigio-scuro);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    margin-bottom: var(--spacing-xxl);
}

.about-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: var(--transition);
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-content h3 {
    color: var(--verde-trestini);
    margin-bottom: var(--spacing-sm);
}

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

/* Products Section */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.product-card {
    background: var(--bianco);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-content {
    padding: var(--spacing-md);
}

.product-title {
    font-size: 1.5rem;
    color: var(--verde-trestini);
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--grigio-scuro);
    margin-bottom: var(--spacing-md);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bianco);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--verde-trestini);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bianco);
    font-size: 2rem;
}

.service-title {
    color: var(--rosso-scuro);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    color: var(--grigio-scuro);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--verde-trestini), var(--rosso-scuro));
    color: var(--bianco);
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.cta-section h2 {
    color: var(--bianco);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
}

.cta-section .btn-primary {
    background-color: var(--bianco);
    color: var(--verde-trestini);
}

.cta-section .btn-primary:hover {
    background-color: var(--beige-chiaro);
    color: var(--rosso-scuro);
}

/* ========================================================================
   FORMS
   ======================================================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--nero);
    margin-bottom: var(--spacing-xs);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--grigio-medio);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    background-color: var(--bianco);
}

.form-control:focus {
    outline: none;
    border-color: var(--verde-trestini);
    box-shadow: 0 0 0 3px rgba(165, 199, 59, 0.1);
}

.form-control.error {
    border-color: var(--rosso-brillante);
}

.form-error {
    color: var(--rosso-brillante);
    font-size: 14px;
    margin-top: var(--spacing-xs);
}

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

select.form-control {
    cursor: pointer;
}

/* ========================================================================
   FOOTER
   ======================================================================== */
.footer {
    background-color: var(--nero);
    color: var(--bianco);
    padding: var(--spacing-xxl) 0 var(--spacing-md);
}

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

.footer-section h4 {
    color: var(--verde-trestini);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

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

.footer-logo-img {
    height: 40px;
    margin-bottom: var(--spacing-xs);
}

.footer-logo h3 {
    color: var(--verde-trestini);
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    color: var(--grigio-medio);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--grigio-medio);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--grigio-medio);
    transition: var(--transition);
}

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

.footer-links span {
    color: var(--grigio-medio);
}

.contact-info p {
    margin-bottom: var(--spacing-xs);
    color: var(--grigio-medio);
}

.contact-info a {
    color: var(--verde-trestini);
}

.contact-info a:hover {
    color: var(--bianco);
}

.language-switcher-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--grigio-scuro);
}

.lang-link-footer {
    color: var(--grigio-medio);
    text-decoration: none;
    transition: var(--transition);
}

.lang-link-footer:hover {
    color: var(--verde-trestini);
}

.lang-current-footer {
    color: var(--verde-trestini);
    font-weight: 600;
}

.footer-bottom {
    border-top: 1px solid var(--grigio-scuro);
    padding-top: var(--spacing-md);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--grigio-medio);
    margin: 0;
}

.footer-links-bottom {
    display: flex;
    gap: var(--spacing-md);
}

.footer-link-bottom {
    color: var(--grigio-medio);
    font-size: 14px;
    transition: var(--transition);
}

.footer-link-bottom:hover {
    color: var(--verde-trestini);
}

/* ========================================================================
   BACK TO TOP BUTTON
   ======================================================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--verde-trestini);
    color: var(--bianco);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--rosso-scuro);
    transform: translateY(-3px);
}

/* ========================================================================
   ANIMATIONS
   ======================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-up-delay {
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* Scroll animations */
.scroll-animation {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.scroll-animation.animate {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================================================
   UTILITY CLASSES
   ======================================================================== */
.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mt-4 { margin-top: var(--spacing-lg) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }
.mt-5 { margin-top: var(--spacing-xl) !important; }
.mb-5 { margin-bottom: var(--spacing-xl) !important; }

/* ========================================================================
   LOADING STATES
   ======================================================================== */
.loading {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--grigio-medio);
    border-top: 2px solid var(--verde-trestini);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}