:root {
    --bg-primary: #0a0c10;
    --bg-surface: #12161f;
    --bg-surface-hover: #181e2b;
    --border-color: #212636;
    --border-focus: #3b82f6;

    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.15);

    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --status-online: #22c55e;
    --status-offline: #ef4444;
    --status-checking: #eab308;
}

/* Base Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.site-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

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

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.15s ease;
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Hero */
.hero-content {
    padding: 4rem 0 3rem;
}

.tagline {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.2;
    letter-spacing: -0.03em;
    font-weight: 800;
    margin-bottom: 1rem;
}

.bio {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
}

/* Sections */
.section {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

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

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
    border-color: var(--border-focus);
    transform: translateY(-2px);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.badge {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    background-color: var(--accent-glow);
    color: var(--accent);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

/* Tech Tags */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    margin-bottom: 1.5rem;
}

.tech-tags li {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: var(--text-muted);
}

/* Status Indicator */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--status-checking);
    display: inline-block;
}

.status-indicator.online .status-dot {
    background-color: var(--status-online);
    box-shadow: 0 0 8px var(--status-online);
}

.status-indicator.offline .status-dot {
    background-color: var(--status-offline);
}

/* Buttons */
.card-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn-primary {
    background-color: var(--text-main);
    color: var(--bg-primary);
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
}

/* Skills Grid */
.stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.stack-category {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
}

.stack-category h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.stack-category ul {
    list-style: none;
}

.stack-category li {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text-main);
}