@import "tailwindcss";

:root {
    --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;

    /* Tokyo Night — backgrounds */
    --color-bg-primary: #1a1b26;
    --color-bg-secondary: #24283b;
    --color-bg-tertiary: #2f3549;
    --color-bg-card: #24283b;
    --color-bg-card-hover: #2f3549;

    /* Tokyo Night — text */
    --color-text-primary: #c0caf5;
    --color-text-secondary: #a9b1d6;
    --color-text-muted: #565f89;

    /* Tokyo Night — accent: electric blue #7aa2f7 */
    --color-accent: #7aa2f7;
    --color-accent-hover: #89b4fa;
    --color-accent-light: #1e2a4a;
    --color-accent-subtle: #192038;
    --color-accent-contrast: #1a1b26;

    /* Chess button — amber/gold */
    --color-chess-btn: #e0af68;
    --color-chess-btn-hover: #d9a54e;
    --color-chess-btn-bg: color-mix(in srgb, #e0af68 15%, transparent);
    --color-chess-btn-border: color-mix(in srgb, #e0af68 40%, transparent);

    /* Tokyo Night — borders */
    --color-border: #3b4261;
    --color-border-light: #24283b;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    --spacing-section: 5rem;
    --spacing-container: 1.5rem;
}

html.light {
    /* Steel blue-grey — cool, clean, no purple */
    --color-bg-primary: #dde8f0;
    --color-bg-secondary: #cfdcea;
    --color-bg-tertiary: #bfcfde;
    --color-bg-card: #edf3f8;
    --color-bg-card-hover: #dde8f0;

    /* Text — dark blue-grey, no purple */
    --color-text-primary: #0f2132;
    --color-text-secondary: #2a4257;
    --color-text-muted: #5e7a90;

    /* Accent — pure blue, no purple shift */
    --color-accent: #1a73e8;
    --color-accent-hover: #1558b0;
    --color-accent-light: #b3d1f8;
    --color-accent-subtle: #cfe2fc;
    --color-accent-contrast: #ffffff;

    --color-border: #b8cfe0;
    --color-border-light: #cfdcea;

    --color-chess-btn: #9a6e1e;
    --color-chess-btn-hover: #7d5916;
    --color-chess-btn-bg: color-mix(in srgb, #9a6e1e 15%, transparent);
    --color-chess-btn-border: color-mix(in srgb, #9a6e1e 40%, transparent);

    --shadow-sm: 0 1px 2px 0 rgb(15 33 50 / 0.08);
    --shadow-md: 0 4px 6px -1px rgb(15 33 50 / 0.1), 0 2px 4px -2px rgb(15 33 50 / 0.07);
    --shadow-lg: 0 10px 15px -3px rgb(15 33 50 / 0.1), 0 4px 6px -4px rgb(15 33 50 / 0.07);
    --shadow-xl: 0 20px 25px -5px rgb(15 33 50 / 0.12), 0 8px 10px -6px rgb(15 33 50 / 0.08);
}

html.light .fa-github {
    color: #0f2132 !important;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-accent);
}

.container {
    width: 100%;
    max-width: 72rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-container);
    padding-right: var(--spacing-container);
}

.section {
    padding-top: var(--spacing-section);
    padding-bottom: var(--spacing-section);
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.section-alt {
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    position: fixed;
    left: 1rem;
    top: 1rem;
    width: auto;
    height: auto;
    padding: 0.75rem 1rem;
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
    z-index: 9999;
    border-radius: var(--radius-md);
    font-weight: 500;
}

@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;
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-section: 3rem;
        --spacing-container: 1rem;
    }
}

.section-title {
    font-size: 1.875rem;
    line-height: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.section-description {
    font-size: 1.125rem;
    line-height: 1.75rem;
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    color: var(--color-text-secondary);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.nav-link-mobile {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link-mobile:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.nav-link-primary {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.nav-link-primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-accent-contrast);
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.btn-accent:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-accent-contrast);
}

.nav-link-mobile-primary {
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.nav-link-mobile-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.card-interactive {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.card-interactive:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.progress-track {
    height: 0.375rem;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    border-radius: var(--radius-full);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.icon-box {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.expertise-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--color-accent-subtle);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: all var(--transition-base);
}

.expertise-card:hover {
    border-color: var(--color-accent);
}

.icon-box-accent {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
}

.expertise-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.expertise-description {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.language-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.language-level {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.quote-icon {
    width: 3rem;
    height: 3rem;
    color: var(--color-accent);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.quote-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin: 0 0 1.5rem 0;
    font-style: italic;
    flex: 1;
}

@media (min-width: 640px) {
    .quote-text {
        font-size: 1.125rem;
    }
}

.recommendation-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border-light);
}

@media (min-width: 640px) {
    .recommendation-footer {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.avatar-initials {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    color: var(--color-accent-contrast);
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.author-name {
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    margin: 0;
    text-transform: none;
    letter-spacing: normal;
}

.author-role {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.recommendation-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin: 0;
    display: block;
    margin-top: 0.125rem;
}

.btn-accent-subtle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-accent-subtle:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.carousel-nav-btn {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-nav-btn:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    text-align: center;
}

.contact-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: inherit;
}

.contact-card:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.icon-circle {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-full);
}

.contact-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.contact-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.social-link {
    padding: 0.5rem;
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    transition: all 200ms ease;
}

.social-link:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.timeline {
    position: relative;
    padding: 1rem 0;
}

.timeline-line {
    position: absolute;
    left: 1.25rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-hover));
    opacity: 0.3;
}

@media (min-width: 768px) {
    .timeline-line {
        left: 50%;
        transform: translateX(-50%);
    }
}

.timeline-item {
    position: relative;
    padding-left: 4rem;
    padding-bottom: 2.5rem;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (min-width: 768px) {
    .timeline-item {
        width: 50%;
        padding-left: 0;
        padding-right: 2.5rem;
    }
    
    .timeline-item-left {
        margin-left: 0;
        padding-right: 2.5rem;
        padding-left: 0;
    }
    
    .timeline-item-right {
        margin-left: 50%;
        padding-left: 2.5rem;
        padding-right: 0;
    }
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 10;
}

@media (min-width: 768px) {
    .timeline-item-left .timeline-marker {
        left: auto;
        right: -1.25rem;
    }
    
    .timeline-item-right .timeline-marker {
        left: -1.25rem;
    }
}

.timeline-icon-wrapper {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-card);
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-icon-wrapper {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
    transform: scale(1.1);
}

.timeline-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-card {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.certificate-card {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.certificate-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.certificate-card:hover::before {
    opacity: 1;
}

.certificate-education {
    border-left: 3px solid var(--color-accent);
}

.certificate-professional {
    border-left: 3px solid var(--color-text-muted);
}

.thesis-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.thesis-link:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.recommendation-card {
    grid-area: 1 / 1;
    display: flex !important;
    flex-direction: column;
    background-color: color-mix(in srgb, var(--color-bg-card) 80%, transparent);
    backdrop-filter: blur(6px);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: opacity var(--transition-base);
    opacity: 0;
    z-index: 0;
    pointer-events: none;
}

.recommendation-active {
    opacity: 1 !important;
    z-index: 1 !important;
    pointer-events: auto !important;
}

@media (min-width: 640px) {
    .recommendation-card {
        padding: 2.5rem;
    }
}

.recommendation-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.recommendation-dot:hover {
    background-color: var(--color-text-muted);
}

.recommendation-dot.active {
    width: 1.5rem;
    background-color: var(--color-accent);
}

.photo-slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity var(--transition-base);
    opacity: 0;
    z-index: 0;
}

.photo-active {
    opacity: 1 !important;
    z-index: 1 !important;
}

.photo-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.photo-dot:hover {
    background-color: var(--color-text-muted);
}

.photo-dot.active {
    width: 1.5rem;
    background-color: var(--color-accent);
}

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
    border: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    z-index: 50;
    transition: all var(--transition-fast);
}

.scroll-to-top:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.scroll-to-top:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

@media (max-width: 640px) {
    .scroll-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

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

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

img[loading="lazy"] {
    background-color: var(--color-bg-tertiary);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.timeline-item-current .timeline-card {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.timeline-icon-current {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
    transform: scale(1.15);
}

.timeline-date-current {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.timeline-current-indicator {
    font-weight: 700;
    margin-right: 0.5rem;
}

.timeline-current-indicator::after {
    content: "·";
    margin-left: 0.5rem;
}

.timeline-card-current {
    position: relative;
    overflow: hidden;
    border: 2px solid var(--color-accent);
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-accent-subtle) 100%);
}

.timeline-card-current::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.about-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgb(0 0 0 / 0.6);
    backdrop-filter: blur(4px);
    padding: 1rem;
}

.about-panel {
    width: 100%;
    max-width: 48rem;
    max-height: 90vh;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.about-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
}

.arch-diagram {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.25rem;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
}

.arch-node {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-card);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.arch-node-dev {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, var(--color-accent-subtle), var(--color-bg-card));
    color: var(--color-accent);
    font-weight: 600;
}

.arch-node-source {
    border-color: var(--color-text-muted);
    color: var(--color-text-primary);
}

.arch-node-ci {
    border-color: var(--color-accent-light);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.arch-node-registry {
    border-color: var(--color-accent-light);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.arch-node-server {
    border-color: var(--color-border);
    color: var(--color-text-primary);
}

.arch-node-tunnel {
    border-color: var(--color-accent-light);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.arch-node-cdn {
    border-color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.arch-node-domain {
    border-color: var(--color-accent);
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.arch-arrow {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.about-tech-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
}

@media (max-width: 640px) {
    .about-panel {
        padding: 1.25rem;
    }

    .arch-diagram {
        gap: 0.375rem;
        padding: 0.75rem;
    }

    .arch-node {
        padding: 0.25rem 0.5rem;
        font-size: 0.6875rem;
    }

    .arch-arrow {
        font-size: 0.75rem;
    }
}

.about-github-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.about-github-cta:hover {
    border-color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    box-shadow: var(--shadow-md);
    color: inherit;
}

.about-github-icon {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.about-github-cta:hover .about-github-icon {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.project-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.project-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: inherit;
}

.project-card:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.project-card-private {
    cursor: default;
    opacity: 0.85;
}

.project-card-private:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border-light);
}

.project-private-badge {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-muted);
}

.project-wip-badge {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    background-color: #2a2415;
    color: #e0af68;
}

.project-tag {
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}

.aoc-year-link {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    text-decoration: none;
}

.aoc-year-link:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
}

.project-timeline-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.project-timeline-link::after {
    content: '\2192';
}

.project-timeline-link:hover {
    color: var(--color-accent-hover);
}

.oss-list-container {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    max-height: 10rem;
    overflow-y: auto;
    transition: all var(--transition-base);
    position: relative;
}

.oss-scroll-hint {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2.5rem;
    background: linear-gradient(to bottom, transparent, var(--color-bg-card));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 0.25rem;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.oss-scroll-hint svg {
    width: 1rem;
    height: 1rem;
    color: var(--color-text-muted);
    animation: oss-bounce 1.5s infinite;
}

@keyframes oss-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(3px); }
}

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

.oss-contribution-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    text-decoration: none;
    transition: background-color var(--transition-fast);
    border-bottom: 1px solid var(--color-border-light);
}

.oss-list li:last-child .oss-contribution-item {
    border-bottom: none;
}

.oss-contribution-item:hover {
    background-color: var(--color-bg-tertiary);
    color: inherit;
}

.oss-icon {
    width: 0.875rem;
    height: 0.875rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.oss-repo {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    white-space: nowrap;
}

.oss-title {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.oss-date {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    margin-left: auto;
    flex-shrink: 0;
}

.contact-form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.375rem;
}

.contact-form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    color: var(--color-text-primary);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form-input::placeholder {
    color: var(--color-text-muted);
}

.contact-form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

@keyframes orbit-cw {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes orbit-ccw {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

.orbit-container {
    --orbit-size: 24rem;
    --orbit-radius: 9rem;
    position: relative;
    width: var(--orbit-size);
    height: var(--orbit-size);
}

@media (min-width: 640px) {
    .orbit-container {
        --orbit-size: 30rem;
        --orbit-radius: 11.5rem;
    }
}

@media (min-width: 1024px) {
    .orbit-container {
        --orbit-size: 34rem;
        --orbit-radius: 13rem;
    }
}

.orbit-ring {
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    z-index: 10;
}

.orbit-ring-single {
    --orbit-duration: 90s;
    animation: orbit-cw var(--orbit-duration) linear infinite;
}

.orbit-path {
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    border: 1px dashed var(--color-border);
    opacity: 0.4;
}

.orbit-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2.25rem;
    height: 2.25rem;
    margin-left: -1.125rem;
    margin-top: -1.125rem;
    transform: rotate(var(--angle)) translateX(var(--orbit-radius)) rotate(calc(-1 * var(--angle)));
}

.orbit-icon-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    border-radius: 9999px;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    font-size: 1rem;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    animation: orbit-ccw var(--orbit-duration) linear infinite;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.orbit-icon-inner:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.orbit-center {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.orbit-center img {
    pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
    .orbit-ring,
    .orbit-icon-inner {
        animation: none !important;
    }
}

/* ── Chessboard background with Smith-Morra Gambit ───────────────────────── */
/* 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bd3 */

.chessboard-bg {
    position: relative;
    overflow-x: hidden;
}

.chessboard-stack {
    display: grid;
}

.chessboard-stack-board,
.chessboard-stack-content {
    grid-row: 1 / -1;
    grid-column: 1 / -1;
}

.chessboard-stack-board {
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 0;
}

.chessboard-stack-content {
    z-index: 1;
    pointer-events: none;
}

.chessboard-stack-content > * {
    pointer-events: auto;
}

.chessboard-layer {
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    transition: opacity var(--transition-base);
    overflow-x: hidden;
    width: 100%;
}

.chessboard-layer--active {
    pointer-events: auto;
}

.chessboard-stack-board:has(.chessboard-layer--active) {
    z-index: 2;
}

.chessboard-layer--active .cb {
    opacity: 0.45;
}

html.light .chessboard-layer--active .cb {
    opacity: 0.65;
}

.chessboard-layer--active .chessboard-title { opacity: 0.85; }
.chessboard-layer--active .chessboard-notation { opacity: 0.9; }
.chessboard-layer--active .chessboard-flavor { opacity: 0.75; }
.chessboard-layer--active .chessboard-meta { opacity: 0.7; }
.chessboard-layer--active .chessboard-link { opacity: 0.85; }

/* Recommendation content fade when viewing board */
.recommendations-content {
    transition: opacity var(--transition-base);
}

.recommendations-content--hidden {
    opacity: 0.05;
    pointer-events: none;
}

.chessboard-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1.5rem;
}

.chessboard-footer {
    text-align: center;
    pointer-events: auto;
    max-width: 90vw;
}

.chessboard-title {
    font-family: "Georgia", "Times New Roman", serif;
    font-size: 1.1rem;
    font-weight: 600;
    font-style: italic;
    color: var(--color-text-primary);
    opacity: 0.4;
    letter-spacing: 0.02em;
    margin: 0;
    max-width: 90vw;
    text-align: center;
}

@media (max-width: 640px) {
    .chessboard-title {
        font-size: 0.9rem;
    }
}

.chessboard-notation {
    font-family: "JetBrains Mono", ui-monospace, "Cascadia Code", "Fira Code", monospace;
    font-size: 0.75rem;
    color: var(--color-accent);
    opacity: 0.5;
    letter-spacing: 0.04em;
    margin: 0.25rem 0 0;
    max-width: 90vw;
    text-align: center;
}

@media (max-width: 640px) {
    .chessboard-notation {
        font-size: 0.625rem;
        letter-spacing: 0.02em;
    }
}

.cb-mn {
    opacity: 0.5;
}

.cb-hl {
    opacity: 0.5;
    transition: opacity 0.3s;
}

.cb-hl--active {
    opacity: 1;
    color: var(--color-chess-btn);
}

.chessboard-meta {
    font-family: var(--font-sans);
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
    opacity: 0.4;
    margin: 0.2rem 0 0;
}

.chessboard-flavor {
    font-family: "Georgia", "Times New Roman", serif;
    font-size: 0.8rem;
    font-style: italic;
    color: var(--color-text-secondary);
    opacity: 0.45;
    margin: 0.4rem 0 0;
    line-height: 1.4;
    text-align: center;
    max-width: 90vw;
}

.chessboard-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.5rem;
    padding: 0.3rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    border: 1px solid color-mix(in srgb, var(--color-accent) 20%, transparent);
    border-radius: var(--radius-full);
    text-decoration: none;
    opacity: 0.6;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.chessboard-link:hover {
    opacity: 1;
    background-color: color-mix(in srgb, var(--color-accent) 15%, transparent);
    color: var(--color-accent);
}

.chessboard-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.5rem;
    padding: 0.4rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-chess-btn);
    background-color: var(--color-chess-btn-bg);
    border: 1px solid var(--color-chess-btn-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 1;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.chessboard-toggle-btn:hover {
    background-color: color-mix(in srgb, var(--color-chess-btn) 25%, transparent);
    border-color: color-mix(in srgb, var(--color-chess-btn) 60%, transparent);
}

.chessboard-controls {
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.5rem;
    pointer-events: auto;
}

.chessboard-toggle-btn::before {
    content: "\265E";
}

.chessboard-toggle-btn::after {
    content: "\265E";
}

.cb {
    --sq: min(9vw, 4.5rem);
    --cb-square: var(--color-accent);
    position: relative;
    width: calc(var(--sq) * 8);
    height: calc(var(--sq) * 8);
    background-image:
        repeating-conic-gradient(
            transparent 0% 25%,
            var(--cb-square) 0% 50%
        );
    background-size: calc(var(--sq) * 2) calc(var(--sq) * 2);
    opacity: 0.10;
    border-radius: var(--radius-md);
}

html.light .cb {
    --cb-square: #5e7a90;
    opacity: 0.12;
}

.cb-piece {
    position: absolute;
    width: var(--sq);
    height: var(--sq);
    left: calc(var(--file) * var(--sq));
    top: calc(var(--rank) * var(--sq));
    background-size: 80%;
    background-repeat: no-repeat;
    background-position: center;
}

/* Piece images — dark mode (white pieces are white SVGs, black pieces are black SVGs) */
.cb-wK { background-image: url('/images/chess/wK-267a80b42f284d7e239e14763a22c93c.svg'); }
.cb-wQ { background-image: url('/images/chess/wQ-abf58997fb94c4952a2430d762fc71fc.svg'); }
.cb-wR { background-image: url('/images/chess/wR-09ccdd5828a4edc4ec508bee9d57aca9.svg'); }
.cb-wB { background-image: url('/images/chess/wB-b1c3a67eadf4720da14579e34ad78b75.svg'); }
.cb-wN { background-image: url('/images/chess/wN-4ead195751f3981784747ef79152d0b6.svg'); }
.cb-wP { background-image: url('/images/chess/wP-90c46196e5ebcb701bc2796b7d6d08c3.svg'); }
.cb-bK { background-image: url('/images/chess/bK-179a64a3aae52afb1e1ed2c9dcac0fb7.svg'); }
.cb-bQ { background-image: url('/images/chess/bQ-9593ac2ea2c76b102843a5de53a24a70.svg'); }
.cb-bR { background-image: url('/images/chess/bR-e03af8d7f7732661cfd1f21dfdc80fdb.svg'); }
.cb-bB { background-image: url('/images/chess/bB-e7de0c6a49e282b6f11aac45a13a036f.svg'); }
.cb-bN { background-image: url('/images/chess/bN-d5f11715d4e2b62ab749b1b27820e244.svg'); }
.cb-bP { background-image: url('/images/chess/bP-4f16f70750df210af264f6acddab1135.svg'); }

/* Smith-Morra Gambit animation: 15 half-moves                              */
/* 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bd3 */
/*                                                                           */
/* Timing: each move ≈ 5% (3% move + 2% hold). 30s loop.                    */
/*   1:  3-6%   e4        8:  38-41%  Nc6                                    */
/*   2:  8-11%  c5        9:  43-46%  Nf3                                    */
/*   3: 13-16%  d4       10:  48-51%  e6                                     */
/*   4: 18-21%  cxd4     11:  53-56%  Bc4                                    */
/*   5: 23-26%  c3       12:  58-61%  a6                                     */
/*   6: 28-31%  dxc3     13:  63-66%  O-O                                    */
/*   7: 33-36%  Nxc3     14:  68-71%  b5                                     */
/*   8: 38-41%  ...      15:  73-76%  Bd3                                    */
/*  76-100% hold final position, then loop                                   */

/* file: a=0 b=1 c=2 d=3 e=4 f=5 g=6 h=7                                   */
/* rank: 8=0 7=1 6=2 5=3 4=4 3=5 2=6 1=7  (top-to-bottom in CSS)           */

/* Move 1: e2→e4  (file 4, rank 6→4) */
@keyframes sm-wPe2 {
    0%, 3%     { top: calc(6 * var(--sq)); left: calc(4 * var(--sq)); }
    6%, 100%   { top: calc(4 * var(--sq)); left: calc(4 * var(--sq)); }
}

/* Move 2: c7→c5  (file 2, rank 1→3) */
/* Move 4: cxd4  c5→d4  (file 2→3, rank 3→4) */
/* Move 6: dxc3  d4→c3  (file 3→2, rank 4→5) */
/* Move 7: Nxc3 — this pawn gets captured (fade out) */
@keyframes sm-bPc7 {
    0%, 8%     { top: calc(1 * var(--sq)); left: calc(2 * var(--sq)); opacity: 1; }
    11%, 17%   { top: calc(3 * var(--sq)); left: calc(2 * var(--sq)); opacity: 1; }
    21%, 27%   { top: calc(4 * var(--sq)); left: calc(3 * var(--sq)); opacity: 1; }
    31%, 32%   { top: calc(5 * var(--sq)); left: calc(2 * var(--sq)); opacity: 1; }
    36%, 100%  { top: calc(5 * var(--sq)); left: calc(2 * var(--sq)); opacity: 0; }
}

/* Move 3: d2→d4  (file 3, rank 6→4) — captured by cxd4 at move 4 */
@keyframes sm-wPd2 {
    0%, 13%    { top: calc(6 * var(--sq)); left: calc(3 * var(--sq)); opacity: 1; }
    16%, 17%   { top: calc(4 * var(--sq)); left: calc(3 * var(--sq)); opacity: 1; }
    21%, 100%  { top: calc(4 * var(--sq)); left: calc(3 * var(--sq)); opacity: 0; }
}

/* Move 5: c2→c3  (file 2, rank 6→5) — captured by dxc3 at move 6 */
@keyframes sm-wPc2 {
    0%, 23%    { top: calc(6 * var(--sq)); left: calc(2 * var(--sq)); opacity: 1; }
    26%, 27%   { top: calc(5 * var(--sq)); left: calc(2 * var(--sq)); opacity: 1; }
    31%, 100%  { top: calc(5 * var(--sq)); left: calc(2 * var(--sq)); opacity: 0; }
}

/* Move 7: Nb1→c3  (file 1→2, rank 7→5) */
@keyframes sm-wNb1 {
    0%, 33%    { top: calc(7 * var(--sq)); left: calc(1 * var(--sq)); }
    36%, 100%  { top: calc(5 * var(--sq)); left: calc(2 * var(--sq)); }
}

/* Move 8: Nb8→c6  (file 1→2, rank 0→2) */
@keyframes sm-bNb8 {
    0%, 38%    { top: calc(0 * var(--sq)); left: calc(1 * var(--sq)); }
    41%, 100%  { top: calc(2 * var(--sq)); left: calc(2 * var(--sq)); }
}

/* Move 9: Ng1→f3  (file 6→5, rank 7→5) */
@keyframes sm-wNg1 {
    0%, 43%    { top: calc(7 * var(--sq)); left: calc(6 * var(--sq)); }
    46%, 100%  { top: calc(5 * var(--sq)); left: calc(5 * var(--sq)); }
}

/* Move 10: e7→e6  (file 4, rank 1→2) */
@keyframes sm-bPe7 {
    0%, 48%    { top: calc(1 * var(--sq)); left: calc(4 * var(--sq)); }
    51%, 100%  { top: calc(2 * var(--sq)); left: calc(4 * var(--sq)); }
}

/* Move 11: Bf1→c4  (file 5→2, rank 7→4) */
/* Move 15: Bc4→d3  (file 2→3, rank 4→5) */
@keyframes sm-wBf1 {
    0%, 53%    { top: calc(7 * var(--sq)); left: calc(5 * var(--sq)); }
    56%, 72%   { top: calc(4 * var(--sq)); left: calc(2 * var(--sq)); }
    76%, 100%  { top: calc(5 * var(--sq)); left: calc(3 * var(--sq)); }
}

/* Move 12: a7→a6  (file 0, rank 1→2) */
@keyframes sm-bPa7 {
    0%, 58%    { top: calc(1 * var(--sq)); left: calc(0 * var(--sq)); }
    61%, 100%  { top: calc(2 * var(--sq)); left: calc(0 * var(--sq)); }
}

/* Move 13: O-O — King e1→g1  (file 4→6, rank 7) */
@keyframes sm-wKe1 {
    0%, 63%    { top: calc(7 * var(--sq)); left: calc(4 * var(--sq)); }
    66%, 100%  { top: calc(7 * var(--sq)); left: calc(6 * var(--sq)); }
}

/* Move 13: O-O — Rook h1→f1  (file 7→5, rank 7) */
@keyframes sm-wRh1 {
    0%, 63%    { top: calc(7 * var(--sq)); left: calc(7 * var(--sq)); }
    66%, 100%  { top: calc(7 * var(--sq)); left: calc(5 * var(--sq)); }
}

/* Move 14: b7→b5  (file 1, rank 1→3) */
@keyframes sm-bPb7 {
    0%, 68%    { top: calc(1 * var(--sq)); left: calc(1 * var(--sq)); }
    71%, 100%  { top: calc(3 * var(--sq)); left: calc(1 * var(--sq)); }
}

/* Apply animations — 30s full loop */
.cb-move-wPe2  { animation: sm-wPe2  30s ease-in-out infinite; }
.cb-move-bPc7  { animation: sm-bPc7  30s ease-in-out infinite; }
.cb-move-wPd2  { animation: sm-wPd2  30s ease-in-out infinite; }
.cb-move-wPc2  { animation: sm-wPc2  30s ease-in-out infinite; }
.cb-move-wNb1  { animation: sm-wNb1  30s ease-in-out infinite; }
.cb-move-bNb8  { animation: sm-bNb8  30s ease-in-out infinite; }
.cb-move-wNg1  { animation: sm-wNg1  30s ease-in-out infinite; }
.cb-move-bPe7  { animation: sm-bPe7  30s ease-in-out infinite; }
.cb-move-wBf1  { animation: sm-wBf1  30s ease-in-out infinite; }
.cb-move-bPa7  { animation: sm-bPa7  30s ease-in-out infinite; }
.cb-move-wKe1  { animation: sm-wKe1  30s ease-in-out infinite; }
.cb-move-wRh1  { animation: sm-wRh1  30s ease-in-out infinite; }
.cb-move-bPb7  { animation: sm-bPb7  30s ease-in-out infinite; }

@media (prefers-reduced-motion: reduce) {
    .cb-piece,
    .cb-hl {
        animation: none !important;
    }
}

/* ── Move highlight animations (synced with piece animations) ──────────── */
@keyframes hl-1  { 0%,3%  { opacity:.5;color:inherit } 3.1%,8%   { opacity:1;color:var(--color-chess-btn) } 8.1%,100%  { opacity:.5;color:inherit } }
@keyframes hl-2  { 0%,8%  { opacity:.5;color:inherit } 8.1%,13%  { opacity:1;color:var(--color-chess-btn) } 13.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-3  { 0%,13% { opacity:.5;color:inherit } 13.1%,18% { opacity:1;color:var(--color-chess-btn) } 18.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-4  { 0%,18% { opacity:.5;color:inherit } 18.1%,23% { opacity:1;color:var(--color-chess-btn) } 23.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-5  { 0%,23% { opacity:.5;color:inherit } 23.1%,28% { opacity:1;color:var(--color-chess-btn) } 28.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-6  { 0%,28% { opacity:.5;color:inherit } 28.1%,33% { opacity:1;color:var(--color-chess-btn) } 33.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-7  { 0%,33% { opacity:.5;color:inherit } 33.1%,38% { opacity:1;color:var(--color-chess-btn) } 38.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-8  { 0%,38% { opacity:.5;color:inherit } 38.1%,43% { opacity:1;color:var(--color-chess-btn) } 43.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-9  { 0%,43% { opacity:.5;color:inherit } 43.1%,48% { opacity:1;color:var(--color-chess-btn) } 48.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-10 { 0%,48% { opacity:.5;color:inherit } 48.1%,53% { opacity:1;color:var(--color-chess-btn) } 53.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-11 { 0%,53% { opacity:.5;color:inherit } 53.1%,58% { opacity:1;color:var(--color-chess-btn) } 58.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-12 { 0%,58% { opacity:.5;color:inherit } 58.1%,63% { opacity:1;color:var(--color-chess-btn) } 63.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-13 { 0%,63% { opacity:.5;color:inherit } 63.1%,68% { opacity:1;color:var(--color-chess-btn) } 68.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-14 { 0%,68% { opacity:.5;color:inherit } 68.1%,73% { opacity:1;color:var(--color-chess-btn) } 73.1%,100% { opacity:.5;color:inherit } }
@keyframes hl-15 { 0%,73% { opacity:.5;color:inherit } 73.1%,76% { opacity:1;color:var(--color-chess-btn) } 76.1%,100% { opacity:.5;color:inherit } }

.cb-hl-1  { animation: hl-1  30s ease-in-out infinite; }
.cb-hl-2  { animation: hl-2  30s ease-in-out infinite; }
.cb-hl-3  { animation: hl-3  30s ease-in-out infinite; }
.cb-hl-4  { animation: hl-4  30s ease-in-out infinite; }
.cb-hl-5  { animation: hl-5  30s ease-in-out infinite; }
.cb-hl-6  { animation: hl-6  30s ease-in-out infinite; }
.cb-hl-7  { animation: hl-7  30s ease-in-out infinite; }
.cb-hl-8  { animation: hl-8  30s ease-in-out infinite; }
.cb-hl-9  { animation: hl-9  30s ease-in-out infinite; }
.cb-hl-10 { animation: hl-10 30s ease-in-out infinite; }
.cb-hl-11 { animation: hl-11 30s ease-in-out infinite; }
.cb-hl-12 { animation: hl-12 30s ease-in-out infinite; }
.cb-hl-13 { animation: hl-13 30s ease-in-out infinite; }
.cb-hl-14 { animation: hl-14 30s ease-in-out infinite; }
.cb-hl-15 { animation: hl-15 30s ease-in-out infinite; }