:root {
    --bg: #ffffff;
    --text: #0b0f14;
    --muted: #5b6777;
    --card: #f6f8fa;
    --border: #e6ebf1;
    --accent: #2563eb;
    --accent-contrast: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] {
    --bg: #0b0f14;
    --text: #e5e7eb;
    --muted: #93a1b2;
    --card: #111827;
    --border: #1f2937;
    --accent: #60a5fa;
    --accent-contrast: #0b0f14;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--accent);
    color: var(--accent-contrast);
    padding: 8px 12px;
    border-radius: 6px;
    z-index: 1000;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    background: color-mix(in oklab, var(--bg) 92%, transparent);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--border);
    z-index: 10;
}

.header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
}

.brand-avatar img {
    border-radius: 50%;
    display: block;
}

.brand-text {
    font-weight: 700;
    letter-spacing: .3px;
}

.site-nav ul {
    list-style: none;
    display: flex;
    gap: 18px;
    margin: 0;
    padding: 0;
}

.site-nav a {
    color: var(--text);
    text-decoration: none;
    opacity: .9;
}

.site-nav a:hover {
    opacity: 1;
    color: var(--accent);
}

.theme-toggle {
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    border-radius: 8px;
    padding: 8px 10px;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.theme-toggle:hover {
    filter: brightness(1.05);
}

.hero {
    padding: 56px 0 24px;
}

.hero-inner {
    display: grid;
    grid-template-columns: 2fr 1fr;
    align-items: center;
    gap: 28px;
}

.hero-text h1 {
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.15;
    margin: 0 0 12px;
}

.subtitle {
    font-size: clamp(16px, 2.2vw, 18px);
    color: var(--muted);
    margin: 0 0 18px;
}

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

.hero-photo img {
    border-radius: 16px;
    width: 100%;
    height: auto;
    box-shadow: var(--shadow);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text);
    border: 1px solid var(--border);
    background: var(--card);
    box-shadow: var(--shadow);
}

.btn:hover {
    transform: translateY(-1px);
    transition: transform .15s ease, filter .15s ease;
    filter: brightness(1.02);
}

.btn.primary {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: color-mix(in oklab, var(--accent) 75%, black);
}

.btn.ghost {
    background: transparent;
}

.btn.small {
    padding: 8px 12px;
    font-size: 14px;
}

.section {
    padding: 36px 0;
}

.section h2 {
    font-size: 24px;
    margin: 0 0 16px;
}

.grid {
    display: grid;
    gap: 16px;
}

.projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: 14px;
    box-shadow: var(--shadow);
    overflow: clip;
    display: flex;
    flex-direction: column;
}

.card-body {
    padding: 16px;
}

.card-title {
    margin: 0 0 8px;
    font-size: 18px;
}

.card-text {
    margin: 0 0 12px;
    color: var(--muted);
}

.card-actions {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
}

.tags li {
    border: 1px solid var(--border);
    background: color-mix(in oklab, var(--card) 85%, transparent);
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 13px;
    color: var(--muted);
}

.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.skills h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 18px 0;
    color: var(--muted);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.icon-link {
    color: inherit;
    text-decoration: none;
    opacity: .85;
}

.icon-link:hover {
    opacity: 1;
    color: var(--accent);
}

/* Responsive */
@media (max-width: 800px) {
    .hero-inner {
        grid-template-columns: 1fr;
    }

    .hero-photo {
        order: -1;
    }

    .header-inner {
        grid-template-columns: auto 1fr auto;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}