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

:root {
    --body-bg: #fafbfc;
    --masthead-bg: rgba(255, 255, 255, 0.95);
    --footer-bg: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
    --surface: #ffffff;
    --news-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    --text: #1f2937;
    --body-text: #374151;
    --muted: #6b7280;
    --faint: #9ca3af;
    --link: #1d4ed8;
    --link-hover: #1e40af;
    --border: #e5e7eb;
    --avatar-bg: #ffffff;
    --github-panel: #ffffff;
    --github-subtle: #f6f8fa;
    --github-line: #d0d7de;
    --github-icon: #57606a;
    --contribution-0: #ebedf0;
    --contribution-1: #9be9a8;
    --contribution-2: #40c463;
    --contribution-3: #30a14e;
    --contribution-4: #216e39;
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.05);
    --radius: 8px;
}

html[data-theme="dark"] {
    --body-bg: #111827;
    --masthead-bg: rgba(17, 24, 39, 0.96);
    --footer-bg: linear-gradient(180deg, #1f2937 0%, #111827 100%);
    --surface: #1f2937;
    --news-bg: linear-gradient(135deg, #1f2937 0%, #243244 100%);
    --text: #f3f4f6;
    --body-text: #d1d5db;
    --muted: #9ca3af;
    --faint: #6b7280;
    --link: #93c5fd;
    --link-hover: #bfdbfe;
    --border: #374151;
    --avatar-bg: #1f2937;
    --github-panel: #0d1117;
    --github-subtle: #161b22;
    --github-line: #30363d;
    --github-icon: #8b949e;
    --contribution-0: #161b22;
    --contribution-1: #0e4429;
    --contribution-2: #006d32;
    --contribution-3: #26a641;
    --contribution-4: #39d353;
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.2);
}

html { scroll-behavior: smooth; }

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background: var(--body-bg);
    color: var(--text);
    font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.65;
    letter-spacing: -0.01em;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.2s ease, color 0.2s ease;
}

a {
    color: var(--link);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover { color: var(--link-hover); }
button { font: inherit; }

.icon-sprite {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

.icon {
    width: 1em;
    height: 1em;
    flex: 0 0 auto;
    fill: currentColor;
}

.masthead {
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid var(--border);
    background: var(--masthead-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex: 0 0 auto;
}

.masthead-inner,
.page-shell {
    width: min(calc(100% - 32px), 1216px);
    margin: 0 auto;
}

.site-nav {
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-links {
    display: flex;
    align-items: stretch;
    min-height: 56px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-links li + li { border-left: 1px solid var(--border); }

.nav-links a {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 56px;
    padding: 0 14px;
    color: var(--muted);
    font-size: 16px;
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.is-active { color: var(--text); }
.nav-links a.is-active { font-weight: 600; }

.nav-links a::after {
    position: absolute;
    right: 14px;
    bottom: 10px;
    left: 14px;
    height: 2px;
    background: #2563eb;
    content: "";
    opacity: 0;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.2s ease;
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

.nav-links .icon { width: 15px; height: 15px; color: var(--faint); }

.control-buttons { display: flex; align-items: center; gap: 8px; }

.control-btn,
.nav-toggle {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.control-btn:hover,
.nav-toggle:hover { border-color: #9ca3af; color: var(--text); }
.nav-toggle { display: none; }

.page-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 900px);
    gap: 56px;
    padding-top: 48px;
    padding-bottom: 24px;
    flex: 1 0 auto;
}

.sidebar { min-width: 0; }

.avatar {
    display: block;
    width: 200px;
    height: 200px;
    margin: 0 0 14px;
    border: 2px solid var(--border);
    border-radius: 50%;
    background: var(--avatar-bg);
    object-fit: cover;
    filter: none;
}

.profile-name {
    margin: 0;
    color: var(--text);
    font-size: 1.38rem;
    font-weight: 700;
    line-height: 1.25;
}

.profile-role {
    margin: 5px 0 16px;
    color: var(--muted);
    font-size: 0.94rem;
}

.profile-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
    padding: 0 0 20px;
    border-bottom: 1px dashed var(--border);
    list-style: none;
}

.profile-links li,
.profile-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--body-text);
    font-size: 0.96rem;
    line-height: 1.4;
}

.profile-links a { text-decoration: none; }
.profile-links a:hover { color: var(--link); }
.profile-links .icon { width: 17px; height: 17px; color: var(--muted); }

.page-content { min-width: 0; }
.content-section { scroll-margin-top: 80px; }

.internal-shell {
    width: min(calc(100% - 32px), 936px);
    margin: 0 auto;
    padding: 28px 0 24px;
    flex: 1 0 auto;
}

.internal-main { min-width: 0; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.readme-shell {
    width: min(calc(100% - 32px), 1200px);
    padding: 32px 0 48px;
}

.readme-content {
    --readme-accent: #2e8f86;
    width: 100%;
}

.readme-hero {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 28px;
}

.readme-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0 10px;
    margin: 18px 0 52px;
    color: var(--muted);
    font-size: 0.96rem;
}

.readme-content a {
    color: var(--readme-accent);
}

.readme-content a:hover {
    color: #d7765a;
}

.readme-section {
    width: min(100%, 840px);
    margin: 0 auto 44px;
    scroll-margin-top: 80px;
}

.readme-section-title {
    margin: 0 0 16px;
    color: var(--text);
    font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: clamp(1.4rem, 2.4vw, 1.7rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.025em;
}

.readme-copy,
.readme-list,
.readme-link-line {
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    font-size: 1.02rem;
    line-height: 1.8;
    letter-spacing: 0.005em;
}

.readme-copy {
    margin: 0;
}

.readme-copy + .readme-copy {
    margin-top: 14px;
}

.readme-copy strong,
.readme-list strong {
    color: var(--text);
    font-weight: 600;
}

.readme-list {
    margin: 0;
    padding-left: 1.5rem;
}

.readme-list li + li {
    margin-top: 9px;
}

.readme-list li::marker {
    color: var(--readme-accent);
    font-weight: 700;
}

.readme-work-list a {
    font-weight: 600;
}

.readme-social-links,
.readme-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}

.readme-social-links {
    gap: 12px;
}

.readme-social-links a {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
}

.readme-social-links img {
    display: block;
    width: 40px;
    height: 30px;
}

.readme-tools {
    gap: 12px;
}

.readme-tools a {
    display: block;
    line-height: 0;
    transition: transform 0.2s ease;
}

.readme-tools a:hover {
    transform: translateY(-2px);
}

.readme-tools img {
    display: block;
    width: 40px;
    height: 40px;
}

.readme-streak {
    max-width: 100%;
    margin: 24px 0 0;
    overflow-x: auto;
}

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

.readme-link-line {
    display: flex;
    flex-wrap: wrap;
    gap: 0 8px;
    margin: 0;
}

.internal-callout {
    position: relative;
    margin: 0 0 30px;
    padding: 15px 20px;
    border-radius: var(--radius);
    background: var(--news-bg);
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    font-size: 1rem;
    line-height: 1.7;
}

.internal-callout::before {
    position: absolute;
    top: 0;
    left: 20px;
    width: 28px;
    height: 2px;
    background: #60a5fa;
    content: "";
}

.internal-section { margin-top: 28px; }

.internal-section-title {
    margin: 0 0 13px;
    color: var(--muted);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.45;
}

.github-dashboard { margin-top: 2px; }

.github-dashboard-header,
.activity-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
}

.github-kicker {
    margin: 0 0 5px;
    color: var(--link);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.github-dashboard .internal-section-title {
    margin-bottom: 16px;
    color: var(--text);
    font-size: 1.24rem;
}

.github-profile-link {
    margin-bottom: 17px;
    color: var(--muted);
    font-size: 0.82rem;
    text-decoration: none;
}

.github-profile-link:hover { color: var(--link); }

.contribution-card {
    overflow: hidden;
    border: 1px solid var(--github-line);
    border-radius: 7px;
    background: var(--github-panel);
    box-shadow: var(--shadow-sm);
}

.contribution-card-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 17px 19px 0;
}

.contribution-total {
    margin: 0;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 600;
}

.contribution-caption,
.contribution-updated {
    margin: 3px 0 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.contribution-updated { white-space: nowrap; }

.contribution-calendar-scroll {
    overflow-x: auto;
    padding: 17px 19px 11px;
    scrollbar-color: var(--github-line) transparent;
}

.contribution-calendar { min-width: 730px; }

.contribution-months {
    position: relative;
    display: block;
    min-width: max-content;
    height: 18px;
    margin-left: 32px;
    color: var(--muted);
    font-size: 0.68rem;
    line-height: 14px;
}

.contribution-months span {
    position: absolute;
    top: 0;
    white-space: nowrap;
}

.contribution-calendar-body {
    display: grid;
    grid-template-columns: 24px max-content;
    gap: 8px;
}

.contribution-weekdays {
    display: grid;
    grid-template-rows: repeat(7, 11px);
    gap: 3px;
    color: var(--muted);
    font-size: 0.65rem;
    line-height: 11px;
    text-align: right;
}

.contribution-grid {
    display: grid;
    grid-template-columns: repeat(var(--week-count, 53), 11px);
    grid-template-rows: repeat(7, 11px);
    grid-auto-flow: column;
    gap: 3px;
    min-width: max-content;
}

.contribution-cell {
    width: 11px;
    height: 11px;
    border: 1px solid rgb(27 31 36 / 0.06);
    border-radius: 2px;
    background: var(--contribution-0);
    cursor: default;
    transition: transform 0.16s ease, outline-color 0.16s ease;
}

.contribution-cell[data-level="1"] { background: var(--contribution-1); }
.contribution-cell[data-level="2"] { background: var(--contribution-2); }
.contribution-cell[data-level="3"] { background: var(--contribution-3); }
.contribution-cell[data-level="4"] { background: var(--contribution-4); }

.contribution-cell:hover {
    outline: 2px solid var(--link);
    outline-offset: 1px;
    transform: scale(1.12);
}

.contribution-legend-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 19px 16px;
    color: var(--muted);
    font-size: 0.74rem;
}

.contribution-legend-row a { color: var(--muted); }
.contribution-legend-row a:hover { color: var(--link); }

.contribution-legend,
.legend-cells {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.legend-cells { margin: 0 5px; }

.legend-cells i {
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: var(--contribution-0);
}

.legend-cells i[data-level="1"] { background: var(--contribution-1); }
.legend-cells i[data-level="2"] { background: var(--contribution-2); }
.legend-cells i[data-level="3"] { background: var(--contribution-3); }
.legend-cells i[data-level="4"] { background: var(--contribution-4); }

.contribution-overview {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    gap: 24px;
    padding: 18px 19px 20px;
    border-top: 1px solid var(--github-line);
    background: var(--github-subtle);
}

.overview-copy h2 {
    margin: 0 0 10px;
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 600;
}

.overview-copy p {
    margin: 0;
    color: var(--body-text);
    font-size: 0.86rem;
    line-height: 1.65;
}

.overview-copy a { font-weight: 600; }

.overview-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.overview-stat {
    display: flex;
    flex-direction: column;
    padding: 9px 11px;
    border: 1px solid var(--github-line);
    border-radius: 5px;
    background: var(--github-panel);
}

.overview-stat strong {
    color: var(--text);
    font-size: 1.05rem;
    line-height: 1.2;
}

.overview-stat span {
    margin-top: 3px;
    color: var(--muted);
    font-size: 0.7rem;
}

.activity-section { margin-top: 38px; }

.activity-section-heading {
    align-items: baseline;
    margin-bottom: 11px;
}

.activity-section-title {
    margin: 0;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 600;
}

.activity-source {
    color: var(--muted);
    font-size: 0.75rem;
}

.activity-timeline {
    position: relative;
    padding: 2px 0 16px 42px;
}

.activity-timeline::before {
    position: absolute;
    top: 20px;
    bottom: 27px;
    left: 14px;
    width: 2px;
    background: var(--github-line);
    content: "";
}

.timeline-loading {
    padding: 18px 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.timeline-month {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0 13px -42px;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 600;
}

.timeline-month:first-child { margin-top: 5px; }

.timeline-month::after {
    height: 1px;
    flex: 1;
    background: var(--github-line);
    content: "";
}

.timeline-entry {
    position: relative;
    margin-bottom: 24px;
}

.timeline-marker {
    position: absolute;
    top: 0;
    left: -42px;
    display: inline-flex;
    width: 30px;
    height: 30px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--github-line);
    border-radius: 50%;
    background: var(--github-subtle);
    color: var(--github-icon);
    font-size: 0.84rem;
    line-height: 1;
}

.timeline-entry-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 14px;
    min-height: 30px;
}

.timeline-entry-title {
    color: var(--text);
    font-size: 0.93rem;
    font-weight: 600;
    line-height: 1.45;
}

.timeline-entry-title a { color: var(--text); }
.timeline-entry-title a:hover { color: var(--link); }

.timeline-entry-date {
    flex: 0 0 auto;
    color: var(--muted);
    font-size: 0.72rem;
    white-space: nowrap;
}

.timeline-card {
    margin-top: 8px;
    padding: 14px 16px;
    border: 1px solid var(--github-line);
    border-radius: 6px;
    background: var(--github-panel);
}

.timeline-card-title {
    display: inline-block;
    color: var(--link);
    font-size: 0.98rem;
    font-weight: 600;
    line-height: 1.45;
}

.timeline-card-title:hover { color: var(--link-hover); }

.timeline-card-summary {
    display: -webkit-box;
    overflow: hidden;
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.55;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.timeline-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.72rem;
}

.timeline-badge {
    display: inline-flex;
    align-items: center;
    min-height: 20px;
    padding: 1px 7px;
    border: 1px solid var(--github-line);
    border-radius: 999px;
    background: var(--github-subtle);
    color: var(--body-text);
    font-size: 0.7rem;
}

.timeline-badge.is-merged { border-color: #8250df; color: #8250df; }
.timeline-badge.is-open { border-color: #1a7f37; color: #1a7f37; }
.timeline-diff-add { color: #1a7f37; }
.timeline-diff-delete { color: #cf222e; }

.timeline-repository-list,
.timeline-summary-list {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin: 7px 0 0;
    padding: 0;
    list-style: none;
}

.timeline-repository-row,
.timeline-summary-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(72px, 108px);
    align-items: center;
    gap: 10px;
    color: var(--body-text);
    font-size: 0.78rem;
}

.timeline-repository-row a,
.timeline-summary-row a { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.timeline-repository-count,
.timeline-summary-count {
    color: var(--muted);
    white-space: nowrap;
}

.timeline-repository-bar {
    height: 6px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--github-line);
}

.timeline-repository-bar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: #2da44e;
}

.timeline-summary-count strong {
    margin-right: 3px;
    padding: 1px 5px;
    border-radius: 999px;
    background: #8250df;
    color: #fff;
    font-size: 0.68rem;
}

.activity-more {
    display: block;
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--github-line);
    border-radius: 6px;
    background: var(--github-panel);
    color: var(--link);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.activity-more:hover { border-color: var(--link); background: var(--github-subtle); }

.internal-copy {
    margin: 0;
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    font-size: 1rem;
    line-height: 1.75;
}

.internal-copy + .internal-copy { margin-top: 14px; }

.quiet-list {
    display: flex;
    flex-direction: column;
    gap: 9px;
    margin: 0;
    padding-left: 24px;
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    line-height: 1.7;
}

.event-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.event-card {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 16px;
    padding: 15px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--news-bg);
    box-shadow: var(--shadow-sm);
}

.event-date {
    color: var(--muted);
    font-size: 0.86rem;
    white-space: nowrap;
}

.event-card p {
    margin: 0;
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    line-height: 1.7;
}

.intro {
    margin: 0;
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    font-size: 1.02rem;
    line-height: 1.75;
    letter-spacing: 0.005em;
}

.intro + .intro { margin-top: 14px; }
.intro strong, .intro em { color: var(--text); }
.intro strong { font-weight: 600; }
.closing { margin-top: 18px !important; }

.page-heading {
    margin: 0 0 20px;
    color: var(--muted);
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1.4;
}

.section-title {
    margin: 30px 0 13px;
    color: var(--muted);
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.4;
}

.news-list {
    margin: 0;
    padding: 5px 18px 5px 42px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--news-bg);
    box-shadow: var(--shadow-sm);
    list-style: none;
}

.news-list li {
    position: relative;
    display: grid;
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 0;
    padding: 8px 0;
    color: var(--body-text);
    font-family: Lora, Georgia, "Times New Roman", "Songti SC", serif;
    font-size: 0.95rem;
    line-height: 1.65;
}

.news-list li + li { border-top: 1px dashed var(--border); }

.news-list li::before {
    position: absolute;
    top: 0.82em;
    left: -22px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--muted);
    content: "";
}

.news-date {
    color: var(--muted);
    font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 0.86rem;
    letter-spacing: 0;
    white-space: nowrap;
}

.news-list a { font-weight: 500; }

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 26px 0 0;
    padding: 0;
    list-style: none;
}

.contact-list a {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--body-text);
    text-decoration: none;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.contact-list a:hover { border-color: var(--link); color: var(--link); }
.contact-list .icon { width: 17px; height: 17px; color: var(--muted); }

.footer {
    margin-top: auto;
    flex: 0 0 auto;
    padding: 20px 16px;
    border-top: 1px solid var(--border);
    background: var(--footer-bg);
    color: var(--muted);
    text-align: center;
    font-size: 0.88rem;
}

.footer p { margin: 0; }
.footer p + p { margin-top: 4px; color: var(--faint); }

@media (max-width: 900px) {
    .page-shell { grid-template-columns: 200px minmax(0, 1fr); gap: 32px; }
    .avatar { width: 160px; height: 160px; }
}

@media (max-width: 680px) {
    .masthead-inner,
    .page-shell { width: min(calc(100% - 28px), 560px); }
    .site-nav { position: relative; }
    .nav-toggle { display: inline-flex; }

    .nav-links {
        position: absolute;
        top: 56px;
        right: 0;
        left: 0;
        display: none;
        min-height: 0;
        flex-direction: column;
        border: 1px solid var(--border);
        border-top: 0;
        background: var(--masthead-bg);
        box-shadow: var(--shadow-sm);
    }

    .nav-links.is-open { display: flex; }
    .nav-links li + li { border-top: 1px solid var(--border); border-left: 0; }
    .nav-links a { width: 100%; min-height: 45px; padding: 0 16px; }
    .nav-links a.is-active::after { right: 16px; bottom: 0; left: 16px; }
    .control-buttons { margin-left: auto; margin-right: 8px; }

    .page-shell { display: block; padding-top: 32px; }
    .internal-shell { width: min(calc(100% - 28px), 560px); padding-top: 24px; }
    .readme-shell { padding-top: 24px; padding-bottom: 36px; }
    .readme-hero { border-radius: 18px; }
    .readme-links { margin-bottom: 40px; }
    .readme-section { margin-bottom: 36px; }
    .readme-copy,
    .readme-list,
    .readme-link-line { font-size: 1rem; line-height: 1.75; }
    .sidebar {
        display: grid;
        grid-template-columns: 112px minmax(0, 1fr);
        gap: 18px;
        align-items: center;
        margin-bottom: 34px;
    }

    .avatar { width: 112px; height: 112px; margin: 0; }
    .profile-role { margin-bottom: 11px; }
    .profile-links { gap: 7px; padding-bottom: 0; border-bottom: 0; }
    .profile-links li, .profile-links a { font-size: 0.88rem; }
    .intro { font-size: 1rem; }
    .news-list { padding-left: 35px; }
    .news-list li { grid-template-columns: 58px minmax(0, 1fr); font-size: 0.92rem; }
    .event-card { grid-template-columns: 1fr; gap: 3px; }
    .github-dashboard-header,
    .activity-section-heading { align-items: flex-start; }
    .github-profile-link { margin: -4px 0 14px; }
    .contribution-overview { grid-template-columns: 1fr; }
    .timeline-entry-header { align-items: flex-start; flex-direction: column; gap: 2px; }
}

@media (max-width: 430px) {
    .sidebar { grid-template-columns: 96px minmax(0, 1fr); gap: 14px; }
    .avatar { width: 96px; height: 96px; }
    .profile-name { font-size: 1.2rem; }
    .news-list li { grid-template-columns: 1fr; gap: 2px; }
    .news-date { font-size: 0.8rem; }
    .readme-hero { border-radius: 14px; }
    .readme-tools { gap: 10px; }
    .contribution-card-heading { flex-direction: column; gap: 4px; }
    .contribution-updated { margin-top: 0; }
    .contribution-legend-row { align-items: flex-start; flex-direction: column; gap: 8px; }
    .timeline-repository-row,
    .timeline-summary-row { grid-template-columns: minmax(0, 1fr) auto; }
    .timeline-repository-bar { display: none; }
}

@keyframes page-fade-in {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes masthead-enter {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes sidebar-enter {
    from { opacity: 0; transform: translateX(-18px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes page-fade-out {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-8px); }
}

body { animation: page-fade-in 0.39s ease both; }
.masthead { animation: masthead-enter 0.31s ease both; }
.page-shell { animation: page-fade-in 0.46s 0.03s ease both; }
.sidebar { animation: sidebar-enter 0.43s 0.07s ease both; }
.page-content { animation: page-fade-in 0.43s 0.1s ease both; }
.news-list, .contact-list { animation: page-fade-in 0.39s 0.19s ease both; }
.footer { animation: page-fade-in 0.39s 0.21s ease both; }
.internal-shell { animation: page-fade-in 0.46s 0.03s ease both; }
.internal-callout { animation: page-fade-in 0.39s 0.1s ease both; }
.internal-section { animation: page-fade-in 0.43s 0.16s ease both; }

body.page-leaving { pointer-events: none; }
body.page-leaving .masthead,
body.page-leaving .page-shell,
body.page-leaving .internal-shell,
body.page-leaving .footer { animation: page-fade-out 0.14s ease both; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}