/**
 * ============================================
 * GALLERY NOIR - Wildlife Photography Portfolio
 * Design System & Styles
 * ============================================
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* Colors - Gallery Noir Palette */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #121212;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-elevated: #222222;

    --color-text-primary: #f5f2eb;
    --color-text-secondary: #a8a5a0;
    --color-text-muted: #6b6760;

    --color-accent-gold: #c9a55c;
    --color-accent-gold-light: #dfc07a;
    --color-accent-gold-dark: #9e7d3a;

    --color-overlay: rgba(10, 10, 10, 0.85);
    --color-overlay-light: rgba(10, 10, 10, 0.6);

    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, 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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* 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;
    --space-5xl: 8rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-slower: 800ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(201, 165, 92, 0.2);

    /* Layout */
    --container-max: 1400px;
    --nav-height: 80px;
}

/* ============================================
   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-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Prevent image selection and dragging */
img {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    pointer-events: none;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

/* ============================================
   LOADING SCREEN
   ============================================ */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loader-icon {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-lg);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loader-text {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: var(--color-accent-gold);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    gap: var(--space-2xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent-gold);
    transition: width var(--transition-base);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    background-size: cover;
    background-position: center 25%;
    transform: scale(1);
}

.hero-slide.active {
    opacity: 1;
    animation: kenBurns 8s ease-out forwards;
}

@keyframes kenBurns {
    from {
        transform: scale(1);
    }

    to {
        transform: scale(1.08);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom,
            rgba(10, 10, 10, 0.4) 0%,
            rgba(10, 10, 10, 0.2) 40%,
            rgba(10, 10, 10, 0.6) 100%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--space-xl);
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent-gold);
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 1s ease 0.5s forwards;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-style: italic;
    font-weight: 300;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    animation: fadeInUp 1s ease 0.7s forwards;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: 1px solid var(--color-accent-gold);
    color: var(--color-accent-gold);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    transition: all var(--transition-base);
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

.hero-cta:hover {
    background: var(--color-accent-gold);
    color: var(--color-bg-primary);
}

.hero-cta svg {
    animation: bounce 2s ease infinite;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(6px);
    }

    60% {
        transform: translateY(3px);
    }
}

/* ============================================
   SECTION COMMON STYLES
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent-gold);
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ============================================
   GALLERY SECTION
   ============================================ */
.gallery {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--color-bg-secondary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-lg);
    max-width: var(--container-max);
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-bg-tertiary);
    cursor: pointer;
    border-radius: 2px;
}

.gallery-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top,
            rgba(10, 10, 10, 0.5) 0%,
            transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 2;
    pointer-events: none;
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--color-accent-gold);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 3;
    pointer-events: none;
}

.gallery-item:hover::before,
.gallery-item:hover::after {
    opacity: 1;
}

.gallery-image-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Protection overlay */
.gallery-protection-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    cursor: pointer;
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    pointer-events: none;
}

.gallery-item:hover .gallery-image {
    transform: scale(1.05);
}

.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    z-index: 4;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base);
    pointer-events: none;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
    transform: translateY(0);
}

.gallery-item-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(201, 165, 92, 0.9);
    border-radius: 50%;
    color: var(--color-bg-primary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--color-bg-primary);
}

.about-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-content {
    max-width: 600px;
}

.about-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.about-text:last-of-type {
    margin-bottom: 0;
}

.about-image {
    position: relative;
    aspect-ratio: 3/4;
    background: var(--color-bg-tertiary);
    overflow: hidden;
}

.about-image-frame {
    position: absolute;
    inset: var(--space-lg);
    border: 1px solid var(--color-accent-gold-dark);
    opacity: 0.5;
}

/* ============================================
   EQUIPMENT SECTION
   ============================================ */
.equipment {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--color-bg-secondary);
}

.equipment-grid {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3xl);
}

.equipment-category {
    padding: var(--space-2xl);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-bg-elevated);
}

.equipment-category-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-accent-gold);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-bg-elevated);
}

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

.equipment-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.equipment-name {
    font-weight: 500;
    color: var(--color-text-primary);
}

.equipment-detail {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--color-bg-primary);
    text-align: center;
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.contact-email {
    display: inline-block;
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    color: var(--color-accent-gold);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base);
}

.contact-email:hover {
    border-bottom-color: var(--color-accent-gold);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-2xl) var(--space-xl);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-bg-tertiary);
    text-align: center;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.footer-notice {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   LIGHTBOX
   ============================================ */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-overlay);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    color: var(--color-text-primary);
    padding: var(--space-sm);
    transition: color var(--transition-fast), transform var(--transition-fast);
    z-index: 10;
}

.lightbox-close:hover {
    color: var(--color-accent-gold);
    transform: rotate(90deg);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-primary);
    padding: var(--space-md);
    transition: color var(--transition-fast), background var(--transition-fast);
    z-index: 10;
}

.lightbox-nav:hover {
    color: var(--color-accent-gold);
    background: rgba(255, 255, 255, 0.1);
}

.lightbox-prev {
    left: var(--space-xl);
}

.lightbox-next {
    right: var(--space-xl);
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-image-wrapper {
    position: relative;
    max-width: 100%;
    max-height: 85vh;
}

.lightbox-protection-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
}

.lightbox-image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    box-shadow: var(--shadow-lg);
    pointer-events: none;
}

.lightbox-counter {
    margin-top: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    letter-spacing: 0.2em;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .about-content {
        max-width: 100%;
        order: 2;
    }

    .about-image {
        order: 1;
        aspect-ratio: 16/9;
        max-height: 400px;
    }

    .equipment-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 70px;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        padding: var(--space-2xl);
        gap: var(--space-xl);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .lightbox-close {
        top: var(--space-md);
        right: var(--space-md);
    }

    .lightbox-nav {
        padding: var(--space-sm);
    }

    .lightbox-prev {
        left: var(--space-sm);
    }

    .lightbox-next {
        right: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .hero-cta {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-size-xs);
    }

    .gallery {
        padding: var(--space-3xl) var(--space-md);
    }

    .gallery-grid {
        gap: var(--space-md);
    }

    .equipment-category {
        padding: var(--space-lg);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Disable text selection on protected elements */
.no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Disable touch callout on mobile */
.no-touch-callout {
    -webkit-touch-callout: none;
}

/* ============================================
   IMAGE BLUR PROTECTION (when page loses focus)
   ============================================ */
body.page-hidden .gallery-image,
body.page-hidden .hero-slide,
body.page-hidden .lightbox-image {
    filter: blur(30px) brightness(0.3);
    transition: filter 0.1s ease;
}

body.page-hidden .gallery-item::before,
body.page-hidden .lightbox::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-primary);
    z-index: 100;
    opacity: 0.95;
}

body.page-hidden .lightbox-image-wrapper::after {
    content: '🔒 Contenuto protetto';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-text-secondary);
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    z-index: 101;
    text-align: center;
    letter-spacing: 0.1em;
}