:root {
    color-scheme: light dark;
    --background: #f6f8fa;
    --surface: #ffffff;
    --surface-subtle: #f6f8fa;
    --text: #1f2328;
    --text-muted: #59636e;
    --border: #d0d7de;
    --border-muted: #d8dee4;
    --accent: #0969da;
    --accent-hover: #0550ae;
    --accent-soft: #ddf4ff;
    --button-text: #ffffff;
    --focus: #0969da;
    --shadow: 0 1px 2px rgb(31 35 40 / 5%);
    --content-width: 1180px;
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-padding-block-start: 1rem;
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    color: var(--text);
    background: var(--background);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 1rem;
    line-height: 1.6;
}

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

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.container {
    width: min(100% - 2rem, var(--content-width));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 10;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.6rem 0.85rem;
    border-radius: 6px;
    color: var(--button-text);
    background: var(--accent);
    font-weight: 600;
    transform: translateY(-180%);
}

.skip-link:focus {
    color: var(--button-text);
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 92%, transparent);
}

.header-content {
    display: flex;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.identity {
    display: flex;
    align-items: baseline;
    gap: 0.8rem;
    color: var(--text);
    text-decoration: none;
}

.identity:hover {
    color: var(--text);
}

.identity-name {
    font-size: 1.05rem;
    font-weight: 700;
}

.identity-context {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.github-link,
.site-footer a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.intro {
    padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3rem, 6vw, 5rem);
}

.intro::before {
    display: block;
    width: 42px;
    height: 4px;
    margin-bottom: 1.5rem;
    border-radius: 999px;
    background: var(--accent);
    content: "";
}

.eyebrow {
    margin: 0 0 0.5rem;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 760px;
    margin-bottom: 1rem;
    font-size: clamp(2rem, 6vw, 3.6rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.intro-text {
    max-width: 720px;
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.projects-section {
    scroll-margin-block-start: 1rem;
    padding-bottom: clamp(4rem, 8vw, 7rem);
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.section-heading h2 {
    margin-bottom: 0;
    font-size: clamp(1.55rem, 3vw, 2rem);
    line-height: 1.2;
}

.project-count {
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.filter-button {
    min-height: 38px;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    background: var(--surface);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.filter-button:hover {
    border-color: var(--text-muted);
    background: var(--surface-subtle);
}

.filter-button.is-active {
    border-color: var(--accent);
    color: var(--button-text);
    background: var(--accent);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.project-card {
    display: flex;
    min-width: 0;
    min-height: 100%;
    flex-direction: column;
    padding: 1.4rem;
    border: 1px solid var(--border-muted);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.project-card--learning {
    border-style: dashed;
    background: color-mix(in srgb, var(--surface) 75%, var(--surface-subtle));
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 1rem;
}

.year-badge {
    padding: 0.18rem 0.55rem;
    border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
    border-radius: 999px;
    color: var(--accent-hover);
    background: var(--accent-soft);
    font-size: 0.75rem;
    font-weight: 700;
}

.project-type {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
}

.project-title {
    margin-bottom: 0.2rem;
    font-size: 1.25rem;
    line-height: 1.3;
}

.repository-name {
    margin-bottom: 1rem;
    overflow-wrap: anywhere;
    color: var(--text-muted);
    font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
    font-size: 0.8rem;
}

.project-description {
    margin-bottom: 1.2rem;
    color: var(--text-muted);
}

.technology-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: auto 0 1.3rem;
    padding: 0;
    list-style: none;
}

.technology {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.22rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-muted);
    background: var(--surface-subtle);
    font-size: 0.75rem;
    font-weight: 600;
}

.technology-icon {
    display: block;
    width: 1.125rem;
    height: 1.125rem;
    flex: 0 0 auto;
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-muted);
}

.project-link {
    display: inline-flex;
    min-height: 38px;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
}

.project-link--secondary {
    color: var(--text);
    background: var(--surface-subtle);
}

.project-link--secondary:hover {
    border-color: var(--text-muted);
    color: var(--text);
    background: var(--surface);
}

.project-link--primary {
    border-color: var(--accent);
    color: var(--button-text);
    background: var(--accent);
}

.project-link--primary:hover {
    border-color: var(--accent-hover);
    color: var(--button-text);
    background: var(--accent-hover);
}

.empty-state,
.noscript-message {
    padding: 2rem;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    background: var(--surface);
    text-align: center;
}

.empty-state p,
.noscript-message {
    margin-bottom: 0;
}

.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.footer-content {
    display: flex;
    min-height: 84px;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-content p {
    margin-bottom: 0;
}

@media (min-width: 700px) {
    .container {
        width: min(100% - 3rem, var(--content-width));
    }

    .projects-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1100px) {
    .projects-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 540px) {
    .header-content,
    .footer-content {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        padding-block: 1rem;
    }

    .identity {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.05rem;
    }

    .intro {
        padding-top: 3rem;
    }

    .project-card {
        padding: 1.15rem;
    }

    .project-links {
        align-items: stretch;
        flex-direction: column;
    }

    .project-link {
        width: 100%;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: #0d1117;
        --surface: #161b22;
        --surface-subtle: #21262d;
        --text: #f0f6fc;
        --text-muted: #9da7b3;
        --border: #30363d;
        --border-muted: #30363d;
        --accent: #4493f8;
        --accent-hover: #6ca8f8;
        --accent-soft: #102a46;
        --button-text: #ffffff;
        --focus: #58a6ff;
        --shadow: 0 1px 2px rgb(0 0 0 / 30%);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}