/**
 * Enes Türkoğlu Photography Portfolio
 * Design System & Styles
 * 
 * Philosophy: Warmth, Nostalgia, Cinematic, Minimal Elegance
 */

/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* Primary Palette - Nostalgic Warmth */
    --color-primary: #D4A574;
    --color-primary-dark: #B8905F;
    --color-primary-light: #E8C9A5;

    /* Secondary Palette - Supporting Tones */
    --color-secondary: #C4917C;
    --color-accent: #8B7355;

    /* Neutrals - Film-Inspired */
    --color-background: #FAF8F5;
    --color-navbar-scrolled: #FAF8F5;
    --color-surface: #FFFFFF;
    --color-heading: #2C2825;
    --color-text-primary: #2C2825;
    --color-text-secondary: #6B6560;
    --color-text-muted: #9A9590;

    /* Teal Shadows (Complementary) */
    --color-teal: #5C8A8A;
    --color-teal-light: #A4C4C4;

    /* Functional Colors */
    --color-success: #7C9473;
    --color-error: #B85C5C;

    /* Gradients */
    --gradient-sunset: linear-gradient(135deg, #D4A574 0%, #C4917C 100%);
    --gradient-hero: linear-gradient(to bottom, rgba(250, 248, 245, 0.95) 0%, rgba(250, 248, 245, 0) 100%);
    --gradient-overlay: linear-gradient(transparent, rgba(0, 0, 0, 0.6));

    /* Font Families */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Type Scale (1.250 - Major Third) */
    --text-xs: 0.8rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.25rem;
    --text-xl: 1.563rem;
    --text-2xl: 1.953rem;
    --text-3xl: 2.441rem;
    --text-4xl: 3.052rem;
    --text-5xl: 3.815rem;

    /* Line Heights */
    --leading-tight: 1.2;
    --leading-normal: 1.6;
    --leading-relaxed: 1.8;

    /* Letter Spacing */
    --tracking-tight: -0.02em;
    --tracking-normal: 0;
    --tracking-wide: 0.05em;
    --tracking-wider: 0.1em;

    /* Spacing Scale (4px base) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Container Widths */
    --container-narrow: 720px;
    --container-normal: 1024px;
    --container-wide: 1280px;
    --container-full: 1600px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
    list-style: none;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
.heading-display {
    font-family: var(--font-serif);
    font-size: clamp(var(--text-4xl), 8vw, var(--text-5xl));
    font-weight: 300;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--color-heading);
}

.heading-1 {
    font-family: var(--font-serif);
    font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-heading);
}

.heading-2 {
    font-family: var(--font-serif);
    font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
    font-weight: 400;
    line-height: var(--leading-tight);
    color: var(--color-heading);
}

.heading-3 {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 500;
    line-height: var(--leading-tight);
    color: var(--color-heading);
}

.body-text {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

.body-large {
    font-family: var(--font-sans);
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

.caption {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* ============================================
   4. LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.container--normal {
    max-width: var(--container-normal);
}

.container--full {
    max-width: var(--container-full);
}

.section {
    padding: var(--space-16) 0;
}

.section--large {
    padding: var(--space-24) 0;
}

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

/* ============================================
   5. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-primary-light);
}

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid transparent;
}

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

.btn-full {
    width: 100%;
}

/* ============================================
   6. NAVIGATION
   ============================================ */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    background: rgba(250, 248, 245, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.main-nav--transparent {
    background: transparent;
    backdrop-filter: none;
}

.main-nav--scrolled {
    background: var(--color-navbar-scrolled);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.logo {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: var(--tracking-tight);
    transition: color var(--transition-fast);
}

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

.nav-links {
    display: flex;
    gap: var(--space-4);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

.nav-link::after {
    display: none;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.5);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    z-index: calc(var(--z-fixed) + 1);
}

.nav-toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-normal);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-surface);
        padding: var(--space-24) var(--space-8);
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }

    .nav-menu.open {
        right: 0;
    }

    .nav-links {
        flex-direction: column;
        gap: var(--space-6);
    }

    .nav-link {
        font-size: var(--text-lg);
    }

    .nav-toggle.active .nav-toggle-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active .nav-toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

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

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-sunset);
}

.hero-content {
    position: relative;
    width: 100%;
    padding: var(--space-16) var(--space-8);
    text-align: center;
    color: white;
    z-index: 1;
}

.hero-overlay {
    position: relative;
}

.hero-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    margin-left: calc(-50vw + 50%);
    background: var(--gradient-hero);
    pointer-events: none;
    z-index: 0;
}

/* Full-height gradient overlay - covers entire hero section */
.hero-gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    pointer-events: none;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(var(--text-3xl), 6vw, var(--text-5xl));
    font-weight: 300;
    letter-spacing: var(--tracking-tight);
    margin-bottom: var(--space-4);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
    font-weight: 300;
    margin-bottom: var(--space-8);
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero .btn {
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* ============================================
   8. GALLERY
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-4);
    padding: var(--space-4);
}

.gallery-item {
    position: relative;
    aspect-ratio: 4/5;
    overflow: hidden;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.gallery-item-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.gallery-image {
    position: relative;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
    z-index: 1;
}

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

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-6) var(--space-4) var(--space-4);
    background: var(--gradient-overlay);
    color: white;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    z-index: 2;
}

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

.gallery-location {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    opacity: 0.8;
    margin-bottom: var(--space-1);
}

.gallery-title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 400;
}

.gallery-empty {
    grid-column: 1 / -1;
    padding: var(--space-16);
    text-align: center;
    color: var(--color-text-muted);
}

/* Responsive gallery */
@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   9. CATEGORY FILTER
   ============================================ */
.category-filter {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-8) var(--space-4);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-2) var(--space-6);
    background: transparent;
    border: 2px solid var(--color-primary-light);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

/* ============================================
   10. CARDS
   ============================================ */
.card {
    display: block;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

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

.card-body {
    padding: var(--space-6);
}

.card-title {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.card-content {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* Card Variants */
.card--nostalgia {
    background: linear-gradient(135deg, #FAF8F5 0%, #F5EFE8 100%);
    border: 1px solid var(--color-primary-light);
}

.card--minimal {
    background: transparent;
    box-shadow: none;
    border-radius: 0;
}

.card--minimal:hover {
    transform: none;
    box-shadow: none;
}

/* ============================================
   11. LIGHTBOX
   ============================================ */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox[hidden] {
    display: none;
}

.lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
}

.lightbox-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: var(--space-8);
}

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

.lightbox-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.lightbox-info {
    padding: var(--space-4);
    text-align: center;
    color: white;
}

.lightbox-title {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 400;
    margin-bottom: var(--space-2);
}

.lightbox-caption {
    font-size: var(--text-sm);
    opacity: 0.8;
    max-width: 600px;
}

.lightbox-close,
.lightbox-nav {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    cursor: pointer;
    padding: var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    z-index: 10;
}

.lightbox-close:hover,
.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-close {
    top: var(--space-4);
    right: var(--space-4);
}

.lightbox-prev {
    left: var(--space-4);
}

.lightbox-next {
    right: var(--space-4);
}

/* ============================================
   12. FORMS
   ============================================ */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-intro {
    margin-bottom: var(--space-8);
    text-align: center;
}

.form-intro p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-surface);
    border: 2px solid var(--color-primary-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

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

.form-error {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-error);
}

.form-success {
    text-align: center;
    padding: var(--space-12);
}

.form-success svg {
    color: var(--color-success);
    margin-bottom: var(--space-4);
}

.form-success h3 {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.form-success p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================
   13. PAGE SECTIONS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header .caption {
    margin-bottom: var(--space-2);
    color: var(--color-primary);
}

.section-header h2 {
    margin-bottom: var(--space-4);
}

.section-header p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-text-secondary);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    align-items: center;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image img {
    width: 100%;
    height: auto;
}

.about-content h2 {
    margin-bottom: var(--space-6);
}

.about-content p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.about-content .highlight {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-style: italic;
    color: var(--color-primary-dark);
    line-height: var(--leading-relaxed);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(212, 165, 116, 0.2);
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.service-card p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================
   14. FOOTER
   ============================================ */
.site-footer {
    background: var(--color-text-primary);
    color: white;
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand .logo {
    color: var(--color-primary-light);
    margin-bottom: var(--space-4);
    display: inline-block;
}

.footer-brand p {
    opacity: 0.7;
    line-height: var(--leading-relaxed);
}

.footer-nav h4,
.footer-contact h4 {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
    color: var(--color-primary-light);
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-nav a {
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--color-primary-light);
}

.footer-contact p {
    opacity: 0.7;
    margin-bottom: var(--space-2);
}

.footer-contact a {
    color: var(--color-primary-light);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-copyright {
    font-size: var(--text-sm);
    opacity: 0.5;
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.footer-social a:hover {
    opacity: 1;
}

/* ============================================
   15. UTILITIES & ACCESSIBILITY
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-2) var(--space-4);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.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;
}

/* Reduced motion */
@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;
    }
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

/* Scroll animations (triggered by JS) */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   17. ERROR PAGE
   ============================================ */
.error-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-8);
}

.error-page h1 {
    font-family: var(--font-serif);
    font-size: clamp(6rem, 20vw, 12rem);
    font-weight: 300;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-4);
}

.error-page p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

/* ============================================
   18. LOADING STATES
   ============================================ */
.image-placeholder {
    background: var(--color-primary);
    animation: pulse 2s ease-in-out infinite;
}

.skeleton {
    background: linear-gradient(90deg,
            var(--color-primary-light) 25%,
            #f0e6d9 50%,
            var(--color-primary-light) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}