/* === SOLOLUV MODERN DESIGN SYSTEM === */

:root {
    /* Typography Scale - Mobile First */
    --font-xs: clamp(10px, 2.5vw, 11px);
    --font-sm: clamp(12px, 3vw, 13px);
    --font-base: clamp(14px, 3.5vw, 15px);
    --font-md: clamp(15px, 4vw, 16px);
    --font-lg: clamp(16px, 4.5vw, 18px);
    --font-xl: clamp(18px, 5vw, 20px);
    --font-2xl: clamp(20px, 6vw, 24px);
    --font-3xl: clamp(24px, 7vw, 28px);
    --font-4xl: clamp(28px, 8vw, 32px);
    --font-5xl: clamp(32px, 10vw, 42px);
    
    /* Font Weights */
    --weight-light: 300;
    --weight-regular: 400;
    --weight-medium: 500;
    
    /* Letter Spacing */
    --spacing-tight: 0.2px;
    --spacing-normal: 0.5px;
    --spacing-wide: 1px;
    --spacing-wider: 1.5px;
    --spacing-widest: 2px;
    
    /* Line Heights */
    --leading-tight: 1.3;
    --leading-normal: 1.5;
    --leading-relaxed: 1.6;
    --leading-loose: 1.7;
    
    /* Spacing Scale - Mobile First */
    --space-xs: clamp(8px, 2vw, 10px);
    --space-sm: clamp(12px, 3vw, 15px);
    --space-md: clamp(16px, 4vw, 20px);
    --space-lg: clamp(24px, 6vw, 30px);
    --space-xl: clamp(32px, 8vw, 40px);
    --space-2xl: clamp(48px, 12vw, 60px);
    --space-3xl: clamp(64px, 16vw, 80px);
    --space-4xl: clamp(96px, 24vw, 120px);
    --space-5xl: clamp(128px, 32vw, 160px);
    
    /* Colors */
    --color-primary: #1a1a1a;
    --color-secondary: #333;
    --color-text: #555;
    --color-light: #666;
    --color-lighter: #888;
    --color-lightest: #adb5bd;
    --color-background: #fdfcf8;
    --color-surface: #f8f9fa;
    --color-border: rgba(26, 26, 26, 0.08);
    --color-overlay: rgba(0, 0, 0, 0.8);
    
    /* Container Sizes - Responsive */
    --container-sm: 90vw;
    --container-md: 85vw;
    --container-lg: 80vw;
    --container-xl: 75vw;
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Z-Index Scale */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 1000;
    --z-toast: 2000;
    
    /* Mobile Specific */
    --touch-target: 44px;
    --safe-area-inset-top: env(safe-area-inset-top);
    --safe-area-inset-bottom: env(safe-area-inset-bottom);
}

/* Enhanced Desktop Containers */
@media (min-width: 768px) {
    :root {
        --container-sm: min(700px, 90vw);
        --container-md: min(900px, 85vw);
        --container-lg: min(1100px, 80vw);
        --container-xl: min(1300px, 75vw);
    }
}

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

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--font-base);
    font-weight: var(--weight-light);
    line-height: var(--leading-relaxed);
    color: var(--color-text);
    background: var(--color-background);
    overflow-x: hidden;
    min-height: 100vh;
    min-height: 100dvh;
    min-height: calc(var(--vh, 1vh) * 100);
    padding-top: var(--safe-area-inset-top);
    padding-bottom: var(--safe-area-inset-bottom);
}

/* Typography System */
.text-display {
    font-size: var(--font-5xl);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-widest);
    line-height: var(--leading-tight);
    color: var(--color-primary);
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern";
}

.text-title {
    font-size: var(--font-4xl);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-wider);
    line-height: var(--leading-tight);
    color: var(--color-primary);
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern";
}

.text-heading {
    font-size: var(--font-2xl);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-wide);
    line-height: var(--leading-normal);
    color: var(--color-primary);
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern";
}

.text-subheading {
    font-size: var(--font-lg);
    font-weight: var(--weight-regular);
    letter-spacing: var(--spacing-normal);
    line-height: var(--leading-normal);
    color: var(--color-secondary);
}

.text-body {
    font-size: var(--font-base);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-tight);
    line-height: var(--leading-relaxed);
    color: var(--color-text);
}

.text-caption {
    font-size: var(--font-sm);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-normal);
    line-height: var(--leading-normal);
    color: var(--color-light);
    font-family: 'Sulphur Point', sans-serif;
}

.text-small {
    font-size: var(--font-xs);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-wide);
    line-height: var(--leading-normal);
    color: var(--color-lighter);
    font-family: 'Sulphur Point', sans-serif;
}

/* Container System */
.container {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    min-height: calc(var(--vh, 1vh) * 100);
}

.container-sm,
.container-md,
.container-lg,
.container-xl {
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-xl { max-width: var(--container-xl); }

@media (min-width: 768px) {
    .container-sm,
    .container-md,
    .container-lg,
    .container-xl {
        padding: 0 var(--space-3xl);
    }
}

/* Header Component */
.site-header {
    padding: var(--space-lg) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    min-height: var(--touch-target);
}

.site-logo {
    font-family: 'Sulphur Point', sans-serif;
    font-size: var(--font-xl);
    font-weight: var(--weight-light);
    color: var(--color-primary);
    letter-spacing: var(--spacing-widest);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.nav-link {
    color: var(--color-light);
    text-decoration: none;
    font-size: var(--font-sm);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-normal);
    font-family: 'Sulphur Point', sans-serif;
    transition: var(--transition-normal);
    padding: var(--space-xs) var(--space-sm);
    min-height: var(--touch-target);
    display: flex;
    align-items: center;
    border-radius: 4px;
    -webkit-tap-highlight-color: transparent;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.02);
}

.nav-link:active {
    transform: translateY(1px);
}

/* Mobile touch targets */
@media (max-width: 768px) {
    .nav-link {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: var(--space-sm);
    }
}

@media (min-width: 768px) {
    .site-header {
        padding: var(--space-xl) var(--space-3xl) var(--space-md);
    }
    
    .nav-links {
        gap: var(--space-lg);
    }
    
    .nav-link {
        font-size: var(--font-md);
        padding: var(--space-xs) 0;
        background: none !important;
    }
}

/* Hero Section */
.hero-section {
    padding: var(--space-2xl) var(--space-md) var(--space-3xl);
    text-align: center;
    position: relative;
}

.hero-image {
    width: 100%;
    max-width: 90vw;
    height: clamp(200px, 50vw, 350px);
    background: linear-gradient(135deg, var(--color-surface) 0%, #e9ecef 100%);
    margin: var(--space-xl) auto var(--space-2xl);
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    aspect-ratio: 16/10;
    content-visibility: auto;
    contain: layout style paint;
}

.hero-image::before {
    content: attr(data-caption);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-lightest);
    font-size: var(--font-sm);
    letter-spacing: var(--spacing-wide);
    font-family: 'Sulphur Point', sans-serif;
    text-align: center;
    white-space: nowrap;
    will-change: opacity;
    backface-visibility: hidden;
}

@media (min-width: 768px) {
    .hero-section {
        padding: var(--space-4xl) var(--space-3xl);
    }
    
    .hero-image {
        max-width: 600px;
        height: 350px;
    }
}

/* Content Flow */
.content-flow {
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .content-flow {
        max-width: var(--container-xl);
        padding: 0 var(--space-3xl);
    }
}

/* Grid Systems */
.article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-4xl);
}

@media (min-width: 768px) {
    .article-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: var(--space-3xl) var(--space-2xl);
    }
}

/* Article Cards */
.article-card {
    background: transparent;
    position: relative;
    margin-bottom: var(--space-xl);
}

.article-image {
    width: 100%;
    height: clamp(180px, 40vw, 220px);
    background: linear-gradient(135deg, var(--color-surface) 0%, #e9ecef 100%);
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal);
    border-radius: 4px;
    aspect-ratio: 16/10;
    content-visibility: auto;
    contain: layout style paint;
}

.article-image::before {
    content: attr(data-placeholder);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-lightest);
    font-size: var(--font-xs);
    letter-spacing: var(--spacing-wide);
    text-align: center;
    font-family: 'Sulphur Point', sans-serif;
    will-change: opacity;
    backface-visibility: hidden;
}

.article-link {
    color: var(--color-secondary);
    text-decoration: none;
    display: block;
    transition: opacity var(--transition-normal);
    -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) {
    .article-card:hover .article-image {
        transform: scale(1.02);
    }
    
    .article-link:hover {
        opacity: 0.9;
    }
}

/* Image placeholders optimization */
.image-placeholder {
    content-visibility: auto;
    contain: layout style paint;
    background: linear-gradient(135deg, var(--color-surface) 0%, #e9ecef 100%);
    position: relative;
    border-radius: 4px;
}

.image-placeholder::before {
    content: attr(data-caption);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-lightest);
    font-size: var(--font-sm);
    letter-spacing: var(--spacing-wide);
    font-family: 'Sulphur Point', sans-serif;
    text-align: center;
    will-change: opacity;
    backface-visibility: hidden;
}

/* Navigation Dots */
.nav-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-3xl) 0;
    flex-wrap: wrap;
    margin: 0 var(--space-md);
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-lightest);
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    min-height: var(--touch-target);
    min-width: var(--touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    will-change: transform, opacity;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.nav-dot::before {
    content: '';
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: inherit;
    transition: inherit;
}

.nav-dot:hover::before,
.nav-dot:focus::before {
    background: var(--color-light);
    transform: scale(1.2);
}

.nav-dot.active::before {
    background: var(--color-secondary);
    transform: scale(1.1);
}

.nav-dot[data-label]::after {
    content: attr(data-label);
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--font-xs);
    color: var(--color-light);
    font-family: 'Sulphur Point', sans-serif;
    letter-spacing: var(--spacing-wide);
    opacity: 0;
    transition: var(--transition-normal);
    white-space: nowrap;
    pointer-events: none;
}

@media (hover: hover) {
    .nav-dot[data-label]:hover::after {
        opacity: 1;
    }
}

@media (min-width: 768px) {
    .nav-dots {
        margin: 0;
    }
    
    .nav-dot {
        width: 10px;
        height: 10px;
        min-height: auto;
        min-width: auto;
    }
    
    .nav-dot::before {
        width: 10px;
        height: 10px;
    }
}

/* Footer Component */
.site-footer {
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-4xl);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--color-light);
    text-decoration: none;
    font-size: var(--font-sm);
    font-weight: var(--weight-light);
    letter-spacing: var(--spacing-normal);
    transition: var(--transition-normal);
    font-family: 'Sulphur Point', sans-serif;
    padding: var(--space-xs);
    min-height: var(--touch-target);
    display: flex;
    align-items: center;
    border-radius: 4px;
    -webkit-tap-highlight-color: transparent;
}

.footer-link:hover,
.footer-link:focus {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.02);
}

/* Mobile touch targets for footer */
@media (max-width: 768px) {
    .footer-link {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: var(--space-sm);
    }
}

@media (min-width: 768px) {
    .site-footer {
        padding: var(--space-4xl) var(--space-3xl) var(--space-3xl);
    }
    
    .footer-links {
        gap: var(--space-2xl);
    }
    
    .footer-link {
        font-size: var(--font-base);
        padding: 0;
        background: none !important;
    }
}

/* Floating elements optimization for mobile */
@media (max-width: 768px) {
    .image-left,
    .image-right {
        float: none !important;
        margin: var(--space-lg) auto !important;
        display: block;
        width: 100% !important;
        max-width: 400px !important;
    }
    
    .text-block.clearfix {
        text-align: left;
    }
}

/* Performance optimizations */
.photo-reveal,
.carousel-item {
    will-change: transform, opacity;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Focus management */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    *:focus {
        outline: 3px solid var(--color-primary);
        outline-offset: 2px;
    }
}

.nav-link:focus,
.footer-link:focus,
.nav-dot:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

/* Utilities */
.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;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Print Styles */
@media print {
    .nav-dots,
    .site-header,
    .site-footer {
        display: none;
    }
    
    .article-image,
    .image-placeholder {
        background: #f5f5f5 !important;
    }
}

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

/* === TEMPORARY DELAY NOTICE STYLES - START === */
/* AI Note: The following styles are for a temporary site state (as of Dec 2023)
   to display a delay notice and disable a link. This can be removed for full launch. */

.delay-notice-container {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    padding: var(--space-lg);
    margin: 0 var(--space-md) var(--space-xl);
    text-align: center;
    font-family: 'Sulphur Point', sans-serif;
    letter-spacing: var(--spacing-wide);
    color: var(--color-text);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.delay-notice-container.is-hiding {
    opacity: 0;
    transform: translateY(-20px);
}

.nav-link-wrapper {
    position: relative;
    display: inline-block;
}

.nav-link.is-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none; /* Disables hover on link itself */
}

.nav-link-wrapper:hover .tooltip-popup {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.tooltip-popup {
    position: absolute;
    bottom: calc(100% + var(--space-sm));
    left: 50%;
    transform: translate(-50%, 10px);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    font-size: var(--font-xs);
    font-family: 'Sulphur Point', sans-serif;
    letter-spacing: var(--spacing-wide);
    color: var(--color-text);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    pointer-events: none;
}
/* === TEMPORARY DELAY NOTICE STYLES - END === */