:root {
    --bg: #ffffff;
    --text: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    --border: #e5e5e5;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--text-secondary); }

.mono {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 0.78em;
    letter-spacing: -0.01em;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
@media (max-width: 640px) { .container { padding: 0 1rem; } }
@media (max-width: 400px) { .container { padding: 0 0.75rem; } }

/* ---- Header ---- */
.site-header {
    padding: 1.75rem 0 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.875rem;
    flex-wrap: wrap;
}
.nav-back {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
}
.nav-back:hover {
    color: var(--text);
    border-bottom-color: var(--text);
}
.profile-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border);
}
.site-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}
.site-title {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.02em;
    line-height: 1.2;
}
.site-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.3;
}
.header-links {
    margin-left: auto;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    display: flex;
    gap: 1.25rem;
    color: var(--text-muted);
}
.header-chart {
    height: 32px;
    width: auto;
    image-rendering: pixelated;
    opacity: 0.7;
    border-radius: 4px;
    flex-shrink: 0;
}
@media (max-width: 800px) {
    .header-chart { display: none; }
}
.header-links a {
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
}
.header-links a:hover {
    color: var(--text);
    border-bottom-color: var(--text);
}
@media (max-width: 640px) {
    .site-header { gap: 0.5rem; padding: 1.25rem 0 1rem; }
    .profile-img { width: 36px; height: 36px; }
    .header-links { margin-left: 0; width: 100%; margin-top: 0.25rem; gap: 0.875rem; }
    .header-links a { padding: 0.35rem 0; display: inline-block; }
}

/* ---- Projects grid ---- */
.projects {
    padding: 2.5rem 0;
}
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}
.project-card {
    background: var(--bg);
    padding: 1.75rem;
    transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.project-card:hover {
    background: #fafafa;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.project-card:active {
    transform: translateY(0);
    box-shadow: none;
}

.project-icon-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.4rem;
}
.project-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}
.project-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
    min-width: 0;
}
.project-title {
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
}
.project-title a:hover { color: var(--text-secondary); }
.project-stamp {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.58rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.12rem 0.35rem;
    border-radius: 2px;
    white-space: nowrap;
}
.project-stamp.live { color: #1e40af; border-color: #bfdbfe; background: #eff6ff; }
.project-stamp.wip { color: #713f12; border-color: #fde68a; background: #fefce8; }
.project-stamp.unsuccessful { color: #991b1b; border-color: #fecaca; background: #fef2f2; }

.project-desc {
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    margin-bottom: 0.6rem;
    word-break: break-word;
    overflow-wrap: break-word;
}

.project-links {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}
.project-links a {
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
}
.project-links a.project-primary-link {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text);
    border-bottom-width: 2px;
}
.project-links a:hover {
    color: var(--text);
    border-bottom-color: var(--text);
}
.project-links span.disabled {
    color: var(--text-muted);
    border-bottom: 1px dashed var(--border);
}

@media (max-width: 640px) {
    .projects-grid { grid-template-columns: 1fr; }
    .project-card { padding: 1.25rem; }
    .project-icon { width: 32px; height: 32px; }
    .project-title { font-size: 1rem; }
    .project-desc { -webkit-line-clamp: 3; line-clamp: 3; }
    .project-stamp { font-size: 0.62rem; }
    .project-links a { padding: 0.35rem 0; display: inline-block; }
}
@media (max-width: 400px) {
    .project-card { padding: 1rem; }
    .project-icon-row { gap: 0.5rem; }
}

/* ---- More link ---- */
.more-section {
    padding: 1.5rem 0 2rem;
    text-align: center;
}
.more-link {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
    transition: color 0.15s, border-color 0.15s;
}
.more-link:hover {
    color: var(--text);
    border-bottom-color: var(--text);
}

/* ---- Repos page ---- */
.repos-section {
    padding: 2rem 0;
}
.repos-section h2 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.repo-list {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    line-height: 1.5;
}
.repo-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
}
.repo-row:last-child { border-bottom: none; }
.repo-row:hover .repo-name { color: var(--text-secondary); }
.repo-name {
    color: var(--text);
    font-weight: 500;
    transition: color 0.15s;
}
.repo-desc {
    color: var(--text-muted);
    font-family: -apple-system, sans-serif;
    font-size: 0.92em;
    margin-left: 0.3rem;
    word-break: break-word;
    overflow-wrap: break-word;
}
.repo-tail {
    color: var(--text-muted);
    font-size: 0.65rem;
    white-space: nowrap;
    align-self: center;
}
.repo-tail .lang-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-right: 0.25rem;
    vertical-align: middle;
    background: var(--text-muted);
}
@media (max-width: 640px) {
    .repo-row { grid-template-columns: 1fr; gap: 0.15rem; }
}

.loading, .error {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 1rem 0;
}
.error { color: #c23e1a; }

/* Skeleton loading */
.skeleton-list {
    display: flex;
    flex-direction: column;
}
.skeleton-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--border);
    align-items: center;
}
.skeleton-name {
    height: 0.9rem;
    width: 180px;
    background: linear-gradient(90deg, var(--border) 25%, #f5f5f5 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 2px;
}
.skeleton-tail {
    height: 0.65rem;
    width: 120px;
    background: linear-gradient(90deg, var(--border) 25%, #f5f5f5 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 2px;
}
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Retry button */
.retry-btn {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--border);
    padding: 0.35rem 0.75rem;
    margin-top: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
}
.retry-btn:hover {
    border-color: var(--text);
    background: #fafafa;
}

/* ---- GitHub chart ---- */
.github-chart-section {
    padding: 1.5rem 0;
    text-align: center;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
}
.github-chart {
    max-width: 100%;
    height: auto;
    image-rendering: pixelated;
    min-width: 640px;
}
.github-chart-note {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}
@media (max-width: 640px) {
    .github-chart-section { padding: 1rem 0; overflow-x: auto; }
}

/* ---- Footer ---- */
footer {
    padding: 1.25rem 0 2rem;
    border-top: 1px solid var(--border);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem;
    color: var(--text-muted);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.footer-inner a {
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}
.footer-inner a:hover {
    color: var(--text);
    border-bottom-color: var(--text);
}
@media (max-width: 640px) {
    .footer-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    footer { padding: 1rem 0 1.5rem; }
}