:root {
    color-scheme: light dark;
    --header-offset: 84px;
    --bg: #0f172a;
    --panel: rgba(15, 23, 42, 0.88);
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: rgba(148, 163, 184, 0.18);
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.35);
    --radius: 20px;
    --max: 1280px;
    --accent: #5b8cff;
    --accent2: #7dd3fc;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bg: #f8fafc;
        --panel: rgba(255, 255, 255, 0.92);
        --text: #0f172a;
        --muted: #64748b;
        --border: rgba(15, 23, 42, 0.08);
        --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
        --accent: #2563eb;
        --accent2: #0ea5e9;
    }
}

[data-theme="light"] {
    --bg: #f8fafc;
    --panel: rgba(255, 255, 255, 0.92);
    --text: #0f172a;
    --muted: #64748b;
    --border: rgba(15, 23, 42, 0.08);
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
    --accent: #2563eb;
    --accent2: #0ea5e9;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --panel: rgba(15, 23, 42, 0.88);
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: rgba(148, 163, 184, 0.18);
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.35);
    --accent: #5b8cff;
    --accent2: #7dd3fc;
}

* { box-sizing: border-box; }

html {
    height: 100%;
    scroll-padding-top: var(--header-offset);
    scroll-behavior: smooth;
}

[id] {
    scroll-margin-top: var(--header-offset);
}

body {
    min-height: 100vh;
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    line-height: 1.6;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 10%, rgba(91, 140, 255, 0.14), transparent 22%),
        radial-gradient(circle at 88% 15%, rgba(125, 211, 252, 0.10), transparent 24%),
        radial-gradient(circle at 30% 85%, rgba(81, 105, 255, 0.07), transparent 18%),
        var(--bg);
    background-repeat: no-repeat;
    background-attachment: fixed;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: var(--max);
    margin: 0 auto;
    padding: 34px 24px 72px;
}

header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(15, 23, 42, 0.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) header {
        background: rgba(248, 250, 252, 0.92);
        border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    }
}

[data-theme="light"] header {
    background: rgba(248, 250, 252, 0.92);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    max-width: var(--max);
    margin: 0 auto;
    padding: 18px 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
}

.brand strong {
    font-size: 0.98rem;
    letter-spacing: 0.2px;
}

.brand span {
    display: block;
    font-size: 0.84rem;
    color: var(--muted);
    margin-top: -2px;
}

.navlinks {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.chip {
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.92rem;
    color: var(--muted);
    transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

[data-theme="light"] .chip {
    background: rgba(15, 23, 42, 0.05);
}

.chip:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.12);
    color: var(--text);
}

[data-theme="light"] .chip:hover {
    background: rgba(15, 23, 42, 0.08);
}

.btn {
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 14px;
    cursor: pointer;
    font: inherit;
    transition: transform 180ms ease, filter 180ms ease, background 180ms ease;
}

.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
    background: rgba(255, 255, 255, 0.12);
}

.hero {
    margin-top: 32px;
    padding: 34px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--panel);
    box-shadow: var(--shadow);
}

h1 {
    margin: 0 0 14px;
    font-size: clamp(2rem, 3.4vw, 3.2rem);
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.subtitle {
    margin: 0 0 20px;
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 760px;
}

.cta-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.primary {
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 14px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, rgba(91, 140, 255, 0.18), rgba(125, 211, 252, 0.18));
    font-weight: 600;
    transition: transform 180ms ease, filter 180ms ease;
}

.primary:hover {
    transform: translateY(-1px);
    filter: brightness(1.08);
}

.secondary {
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 14px;
    border: 1px solid var(--border);
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .secondary {
    background: rgba(15, 23, 42, 0.04);
}

section {
    margin-top: 28px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.card {
    grid-column: span 12;
    padding: 22px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--panel);
}

.card.full {
    grid-column: span 12;
}

@media (min-width: 760px) {
    .card.half {
        grid-column: span 6;
    }
    .card.third {
        grid-column: span 4;
    }
}

.card h2 {
    margin: 0 0 10px;
    font-size: 1.2rem;
    letter-spacing: -0.01em;
}

.card p {
    margin: 0;
    color: var(--muted);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.tag {
    font-size: 0.85rem;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .tag {
    background: rgba(15, 23, 42, 0.04);
}

.project-meta {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.project-meta a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.28);
}

[data-theme="light"] .project-meta a {
    border-bottom-color: rgba(15, 23, 42, 0.28);
}

.contact-form {
    margin-top: 16px;
    display: grid;
    gap: 14px;
    width: 100%;
}

.contact-form label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    font: inherit;
}

[data-theme="light"] .contact-form input,
[data-theme="light"] .contact-form textarea {
    background: rgba(15, 23, 42, 0.04);
}

.contact-form textarea {
    resize: vertical;
    min-height: 140px;
}

footer {
    margin-top: 32px;
    color: var(--muted);
    font-size: 0.94rem;
}