/* ==========================================================================
   Sydney Sweeney Fan Gallery — Editorial Dark Theme
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Color Palette — Warm dark tones for cinematic feel */
    --color-bg-deep: #0a0a0b;
    --color-bg: #111113;
    --color-bg-elevated: #1a1a1d;
    --color-bg-subtle: #222226;
    
    --color-text-primary: #f5f5f4;
    --color-text-secondary: #a1a1a8;
    --color-text-muted: #6b6b73;
    
    --color-accent: #d4a574;
    --color-accent-hover: #e5b885;
    --color-accent-subtle: rgba(212, 165, 116, 0.15);
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 0.9375rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
    --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
    --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
    --text-hero: clamp(2.5rem, 2rem + 5vw, 5.5rem);
    
    /* Spacing */
    --space-xs: clamp(0.5rem, 0.4rem + 0.5vw, 0.75rem);
    --space-sm: clamp(0.75rem, 0.6rem + 0.75vw, 1rem);
    --space-md: clamp(1rem, 0.8rem + 1vw, 1.5rem);
    --space-lg: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
    --space-xl: clamp(2rem, 1.5rem + 2.5vw, 4rem);
    --space-2xl: clamp(3rem, 2rem + 5vw, 6rem);
    --space-3xl: clamp(4rem, 3rem + 5vw, 8rem);
    
    /* Layout */
    --container-max: 1400px;
    --container-narrow: 900px;
    
    /* Z-Index Scale */
    --z-base: 1;
    --z-elevated: 10;
    --z-overlay: 100;
    --z-modal: 1000;
    --z-skip-link: 9999;
    
    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 400ms;
    
    /* Effects */
    --blur-subtle: blur(12px);
    --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.5);
    
    /* Focus */
    --focus-outline: 2px solid var(--color-accent);
    --focus-outline-offset: 3px;
    --focus-ring: 0 0 0 3px rgba(212, 165, 116, 0.4);
    
    /* Safe Area Insets for notched devices */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
}

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

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

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

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-deep);
    overflow-x: hidden;
    min-height: 100vh;
    min-height: 100dvh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text-primary);
}

p {
    color: var(--color-text-secondary);
    max-width: 65ch;
}

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

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

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

ul, li {
    list-style: none;
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
/* Screen Reader Only - hides content visually but keeps it accessible */
.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;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-skip-link);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-accent);
    color: var(--color-bg-deep);
    font-weight: 600;
    border-radius: 0 0 4px 4px;
    transition: top var(--duration-fast) var(--ease-out);
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
    outline: none;
    box-shadow: var(--shadow-elevated);
}

/* Focus States */
:focus {
    outline: none;
}

:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
    box-shadow: var(--focus-ring);
}

/* Fallback for browsers without :focus-visible */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
    outline: none;
    box-shadow: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: rgba(255, 255, 255, 0.3);
        --color-border-hover: rgba(255, 255, 255, 0.5);
        --color-text-secondary: #c1c1c8;
        --color-text-muted: #9b9ba3;
    }
    
    :focus-visible {
        outline: 3px solid var(--color-accent);
        outline-offset: 2px;
    }
    
    .about__card {
        border-width: 2px;
    }
}

/* Forced colors mode (Windows High Contrast) */
@media (forced-colors: active) {
    .hero__cta,
    .about__card,
    .lightbox__close,
    .lightbox__prev,
    .lightbox__next {
        border: 2px solid currentColor;
    }
    
    :focus-visible {
        outline: 3px solid Highlight;
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__backdrop {
    position: absolute;
    inset: 0;
    /* Fallback for older browsers */
    background-image: url('images/hero.jpg');
    /* Modern browsers: WebP with responsive sizes */
    background-image: image-set(
        'images/medium/hero.webp' type('image/webp') 1x,
        'images/large/hero.webp' type('image/webp') 2x,
        'images/hero.jpg' 1x
    );
    background-size: cover;
    background-position: center 20%;
    background-repeat: no-repeat;
    filter: brightness(0.35) saturate(0.85);
    transform: scale(1.05);
    transition: transform 8s var(--ease-out);
    will-change: transform;
}

/* Mobile: use smaller hero image */
@media (max-width: 768px) {
    .hero__backdrop {
        background-image: url('images/medium/hero.webp');
        background-image: image-set(
            'images/medium/hero.webp' type('image/webp') 1x,
            'images/large/hero.webp' type('image/webp') 2x
        );
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero__backdrop {
        transform: scale(1);
        transition: none;
        will-change: auto;
    }
}

.hero:hover .hero__backdrop {
    transform: scale(1);
}

.hero__backdrop::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(10, 10, 11, 0.3) 0%,
        rgba(10, 10, 11, 0.1) 40%,
        rgba(10, 10, 11, 0.6) 100%
    );
}

.hero__content {
    position: relative;
    z-index: var(--z-elevated);
    text-align: center;
    padding: var(--space-lg);
}

.hero__title {
    font-size: var(--text-hero);
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s var(--ease-out) 0.3s forwards;
    /* Prevent overflow on small screens */
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
}

.hero__subtitle {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    font-weight: 300;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 1s var(--ease-out) 0.5s forwards;
}

.hero__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 0;
    backdrop-filter: var(--blur-subtle);
    -webkit-backdrop-filter: var(--blur-subtle);
    transition: all var(--duration-base) var(--ease-out);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 1s var(--ease-out) 0.7s forwards;
}

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(12px)) {
    .hero__cta {
        background: rgba(30, 30, 32, 0.9);
    }
}

.hero__cta:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.hero__cta:focus-visible {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.hero__cta svg {
    transition: transform var(--duration-base) var(--ease-out);
}

.hero__cta:hover svg {
    transform: translateY(3px);
}

@media (prefers-reduced-motion: reduce) {
    .hero__title,
    .hero__subtitle,
    .hero__cta {
        opacity: 1;
        transform: none;
        animation: none;
    }
    
    .hero__cta:hover {
        transform: none;
    }
    
    .hero__cta:hover svg {
        transform: none;
    }
}

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

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--color-bg);
    /* Performance: skip rendering when off-screen */
    content-visibility: auto;
    contain-intrinsic-size: 600px;
}

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

.about__heading {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-lg);
    position: relative;
}

.about__heading::after {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background: var(--color-accent);
    margin-top: var(--space-sm);
}

.about__intro {
    font-size: var(--text-lg);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
}

.about__cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
}

.about__card {
    padding: var(--space-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 0;
    transition: all var(--duration-base) var(--ease-out);
}

.about__card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
}

@media (prefers-reduced-motion: reduce) {
    .about__card:hover {
        transform: none;
    }
}

.about__card-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-accent);
}

.about__card-text {
    font-size: var(--text-sm);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Gallery Section
   -------------------------------------------------------------------------- */
.gallery {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--color-bg-deep);
    /* Performance: skip rendering when off-screen */
    content-visibility: auto;
    contain-intrinsic-size: 800px;
}

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

.gallery__heading {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-sm);
    padding: 0;
}

.gallery__item {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: var(--color-bg-subtle);
    border: none;
    border-radius: 0;
    transition: transform var(--duration-slow) var(--ease-out);
    cursor: pointer;
}

.gallery__item:hover {
    transform: scale(1.02);
    z-index: var(--z-elevated);
}

.gallery__item:focus-visible {
    outline-offset: 4px;
    z-index: var(--z-overlay);
}

@media (prefers-reduced-motion: reduce) {
    .gallery__item:hover {
        transform: none;
    }
}

.gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out), filter var(--duration-slow) var(--ease-out);
    will-change: transform, filter;
}

.gallery__item:hover img {
    transform: scale(1.05);
    filter: brightness(0.85);
}

@media (prefers-reduced-motion: reduce) {
    .gallery__item img {
        will-change: auto;
    }
    
    .gallery__item:hover img {
        transform: none;
        filter: none;
    }
}

.gallery__item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.6) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out);
    pointer-events: none;
}

.gallery__item:hover .gallery__item-overlay {
    opacity: 1;
}

/* Reveal Animation */
.gallery__item {
    opacity: 0;
    transform: translateY(20px);
}

.gallery__item.revealed {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

/* No-motion class for reduced motion preference */
.gallery__item.no-motion {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (prefers-reduced-motion: reduce) {
    .gallery__item {
        opacity: 1;
        transform: none;
    }
    
    .gallery__item.revealed {
        transition: none;
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-xl) var(--space-lg);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer__container {
    max-width: var(--container-narrow);
    margin: 0 auto;
    text-align: center;
}

.footer__disclaimer {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

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

/* --------------------------------------------------------------------------
   Lightbox
   -------------------------------------------------------------------------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-base) var(--ease-out), visibility var(--duration-base);
    /* Safe area support for notched devices */
    padding-top: var(--safe-area-top);
    padding-bottom: var(--safe-area-bottom);
}

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

/* Body scroll is locked via JavaScript (document.body.style.overflow) */

.lightbox__close {
    position: absolute;
    top: max(var(--space-md), var(--safe-area-top));
    right: max(var(--space-md), var(--safe-area-right));
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid transparent;
    border-radius: 50%;
    transition: all var(--duration-fast) var(--ease-out);
    z-index: calc(var(--z-modal) + 1);
}

.lightbox__close:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.lightbox__close:focus-visible {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.1);
}

.lightbox__prev,
.lightbox__next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid transparent;
    border-radius: 50%;
    transition: all var(--duration-fast) var(--ease-out);
    z-index: calc(var(--z-modal) + 1);
}

.lightbox__prev:hover,
.lightbox__next:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.lightbox__prev:focus-visible,
.lightbox__next:focus-visible {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.1);
}

.lightbox__prev {
    left: max(var(--space-md), var(--safe-area-left));
}

.lightbox__next {
    right: max(var(--space-md), var(--safe-area-right));
}

.lightbox__content {
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox__image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.lightbox.active .lightbox__image {
    opacity: 1;
    transform: scale(1);
}

/* Lightbox error state */
.lightbox__error {
    color: var(--color-text-secondary);
    text-align: center;
    padding: var(--space-xl);
}

.lightbox__error p {
    color: var(--color-text-muted);
    font-size: var(--text-lg);
}

@media (prefers-reduced-motion: reduce) {
    .lightbox__image {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    .lightbox.active .lightbox__image {
        transform: none;
    }
}

.lightbox__counter {
    position: absolute;
    bottom: max(var(--space-md), var(--safe-area-bottom));
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .hero__backdrop {
        background-position: center center;
    }
    
    .hero__subtitle {
        letter-spacing: 0.15em;
    }
    
    .about__cards {
        grid-template-columns: 1fr;
    }
    
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }
    
    .lightbox__prev,
    .lightbox__next {
        width: 44px;
        height: 44px;
    }
    
    .lightbox__prev {
        left: max(var(--space-sm), var(--safe-area-left));
    }
    
    .lightbox__next {
        right: max(var(--space-sm), var(--safe-area-right));
    }
}

@media (max-width: 480px) {
    .gallery__grid {
        grid-template-columns: 1fr;
    }
    
    .gallery__item {
        aspect-ratio: 3 / 4;
    }
    
    .hero__title {
        font-size: clamp(2rem, 1.5rem + 5vw, 3rem);
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .hero__backdrop {
        background-image: none;
        background-color: #000;
    }
    
    .lightbox,
    .hero__cta,
    .skip-link {
        display: none !important;
    }
    
    .gallery__item {
        opacity: 1;
        transform: none;
        page-break-inside: avoid;
    }
    
    body {
        background: #fff;
        color: #000;
    }
    
    .about__card {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
    
    .gallery__item img {
        max-width: 100%;
        height: auto;
        page-break-inside: avoid;
    }
}