/* ==========================================================================
   Crystal Software - Modern Styles
   ========================================================================== */

/* CSS Variables / Custom Properties */
:root {
    /* Colors */
    --color-primary: #bf1e2e;
    --color-dark: #212121;
    --color-gray: #dadada;
    --color-light: #ffffff;
    --color-text: #333333;
    --color-text-light: #ffffff;

    /* Typography */
    --font-primary: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Layout */
    --container-max-width: 1200px;
    --content-max-width: 600px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index layers */
    --z-header: 100000;
    --z-nav: 99999;
    --z-progress: 100001;
    --z-skip-link: 100002;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

a:hover, a:focus {
    color: var(--color-light);
    text-decoration: underline;
}

/* ==========================================================================
   Skip Link (Accessibility)
   ========================================================================== */

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-light);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-skip-link);
    font-weight: var(--font-weight-semibold);
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--color-dark);
    outline-offset: 2px;
}

/* ==========================================================================
   Container & Layout
   ========================================================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(33, 33, 33, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(33, 33, 33, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    z-index: calc(var(--z-header) + 1);
}

.logo img {
    height: 45px;
    width: auto;
    filter: brightness(1.2);
}

@media (min-width: 768px) {
    .logo img {
        height: 52px;
    }
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: calc(var(--z-header) + 1);
    position: relative;
    width: 48px;
    height: 48px;
}

.hamburger {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--color-dark);
    position: relative;
    transition: background var(--transition-fast);
    border-radius: 2px;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 28px;
    height: 3px;
    background: var(--color-dark);
    left: 0;
    transition: all var(--transition-fast);
    border-radius: 2px;
}

.hamburger::before {
    top: -9px;
}

.hamburger::after {
    bottom: -9px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
    background: var(--color-primary);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
    background: var(--color-primary);
}

/* Navigation - Mobile First - SUPER SIMPLE */
.main-nav {
    display: none;
}

.main-nav.is-open {
    display: block;
}

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

/* MOBILE - Regole specifiche per schermi piccoli */
@media (max-width: 767px) {
    .site-header {
        background: #dadada;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }

    .logo img {
        filter: none;
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: #dadada;
        z-index: 99999;
        padding-top: calc(var(--header-height) + 40px);
        padding-left: 20px;
        padding-right: 20px;
        padding-bottom: 20px;
    }

    .nav-list li {
        margin-bottom: 5px;
        background: #ffffff;
    }

    .nav-list li:last-child {
        margin-bottom: 0;
    }

    .nav-link {
        display: block;
        padding: 20px 15px;
        font-size: 20px;
        font-weight: 600;
        color: #212121;
        text-transform: uppercase;
        text-decoration: none;
        border-bottom: 2px solid #cccccc;
    }

    .nav-link:hover,
    .nav-link:focus {
        color: #bf1e2e;
        background: #ffe5e8;
        text-decoration: none;
    }

    .nav-link.active {
        color: #bf1e2e;
        font-weight: 700;
        background: #ffe5e8;
    }
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .main-nav {
        display: block;
        position: static;
        background: transparent;
        padding: 0;
        overflow: visible;
    }

    .nav-list {
        display: flex;
        flex-direction: row;
        gap: var(--spacing-lg);
    }

    .nav-list li {
        border-bottom: none;
        background: transparent;
    }

    .nav-link {
        padding: var(--spacing-xs) 0;
        font-size: 1rem;
        color: #ffffff;
        border-bottom: 2px solid transparent;
    }

    .nav-link:hover,
    .nav-link:focus {
        color: #bf1e2e;
        border-bottom-color: #bf1e2e;
        background: transparent;
    }

    .nav-link.active {
        color: #bf1e2e;
        border-bottom-color: #bf1e2e;
    }
}

/* ==========================================================================
   Main Content & Sections
   ========================================================================== */

.main-content {
    margin-top: var(--header-height);
}

.section {
    position: relative;
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: var(--spacing-xxl) 0;
    scroll-margin-top: var(--header-height);
}

.section-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-dark);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.95;
    z-index: -1;
}

.section-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 33, 33, 0.7) 0%, rgba(33, 33, 33, 0.4) 100%);
}

.content-box {
    max-width: var(--content-max-width);
    animation: fadeInUp 0.8s ease-out;
}

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

/* ==========================================================================
   Typography
   ========================================================================== */

.heading {
    font-weight: var(--font-weight-light);
    color: var(--color-text-light);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.heading--xl {
    font-size: clamp(1.75rem, 5vw, 2.75rem);
}

.heading--lg {
    font-size: clamp(1.5rem, 4vw, 2rem);
}

.heading--md {
    font-size: clamp(1.25rem, 3.5vw, 1.75rem);
}

.heading--sm {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
}

.highlight {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.quote-author {
    font-size: 1rem;
    font-style: italic;
    color: var(--color-text-light);
    text-align: right;
    margin-bottom: var(--spacing-lg);
    font-weight: var(--font-weight-light);
}

.text-content {
    color: var(--color-text-light);
    line-height: 1.7;
}

.text-content p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.text-content p:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   Lists
   ========================================================================== */

.service-list,
.feature-list {
    list-style: none;
    margin-top: var(--spacing-md);
}

.service-list li,
.feature-list li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.service-list li::before,
.feature-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.highlight-text {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    text-align: right;
    margin-top: var(--spacing-lg);
}

/* ==========================================================================
   Service Items
   ========================================================================== */

.service-item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.service-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.service-title {
    color: var(--color-primary);
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.service-item ul {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.service-item ul li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.service-item ul li::before {
    content: '–';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.external-link {
    color: var(--color-primary);
    text-decoration: underline;
    font-weight: var(--font-weight-semibold);
}

.external-link:hover,
.external-link:focus {
    color: var(--color-light);
}

/* ==========================================================================
   Contact Info
   ========================================================================== */

.contact-info {
    font-style: normal;
    line-height: 1.8;
}

.company-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-link {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.contact-link:hover,
.contact-link:focus {
    color: var(--color-light);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    background: var(--color-dark);
    color: var(--color-text-light);
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.875rem;
}

.copyright {
    line-height: 1.6;
}

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

.copyright a:hover,
.copyright a:focus {
    color: var(--color-light);
}

/* ==========================================================================
   Scroll Progress Indicator
   ========================================================================== */

.scroll-progress {
    position: fixed;
    top: var(--header-height);
    left: 0;
    height: 3px;
    background: var(--color-primary);
    width: 0%;
    z-index: var(--z-progress);
    transition: width var(--transition-fast);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (min-width: 768px) {
    .content-box {
        max-width: 700px;
    }

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

@media (min-width: 1024px) {
    .content-box {
        max-width: 800px;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .site-header,
    .main-nav,
    .scroll-progress,
    .skip-link {
        display: none;
    }

    .main-content {
        margin-top: 0;
    }

    .section {
        min-height: auto;
        page-break-inside: avoid;
    }

    .section-bg {
        display: none;
    }

    .text-content,
    .heading,
    .quote-author {
        color: #000 !important;
    }
}

/* ==========================================================================
   Accessibility & Focus Styles
   ========================================================================== */

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   Performance Optimizations
   ========================================================================== */

.section-bg {
    will-change: opacity;
}

.main-nav {
    will-change: transform;
}

/* ==========================================================================
   Buttons & CTA
   ========================================================================== */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.5;
}

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

.btn--primary:hover,
.btn--primary:focus {
    background-color: #a51a27;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(191, 30, 46, 0.3);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.cta-wrapper {
    margin-top: var(--spacing-lg);
    text-align: center;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .btn {
        width: 100%;
    }
}