:root {
    --bg-color: #030712;
    --panel-color: rgba(15, 23, 42, 0.78);
    --neon-blue: #00f0ff;
    --neon-purple: #9d4edd;
    --text-color: #e2e8f0;
    --muted-color: #bfdbfe;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top, rgba(157, 78, 221, 0.08), transparent 25%),
        linear-gradient(135deg, #020617 0%, #030712 45%, #04111f 100%);
    color: var(--text-color);
    font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

#particle-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

.portfolio-shell {
    width: min(1200px, calc(100vw - 1.5rem));
    margin: 0 auto;
    padding-bottom: 2rem;
}

.site-header,
.site-footer,
.section-card {
    background: var(--panel-color);
    border: 1px solid rgba(0, 240, 255, 0.18);
    border-radius: 18px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.35);
    backdrop-filter: blur(10px);
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    margin-top: 1rem;
    position: sticky;
    top: 0.75rem;
    z-index: 5;
}

.brand,
.nav-link,
.cyber-btn {
    text-decoration: none;
    color: var(--text-color);
}

.brand {
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--neon-blue);
}

.site-nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--muted-color);
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--neon-blue);
}

main {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.hero {
    display: grid;
    grid-template-columns: 1.3fr 0.8fr;
    gap: 1rem;
    padding: 1.25rem;
}

.section-card {
    padding: 1.1rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.25em;
    font-size: 0.85rem;
    color: var(--neon-purple);
}

h1, h2, h3 {
    line-height: 1.15;
}

h1 {
    font-size: clamp(2rem, 4vw, 3.3rem);
    margin-bottom: 0.5rem;
}

h2 { font-size: 1.25rem; margin-top: 0; }

.meta {
    color: var(--neon-blue);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.lede,
.mini-card p,
.project-card p,
.status-note,
.contact-list {
    color: var(--muted-color);
}

.button-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.cyber-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--neon-blue);
    background: rgba(0, 240, 255, 0.06);
    color: var(--neon-blue);
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cyber-btn:hover,
.cyber-btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
}

.info-list,
.contact-list {
    padding-left: 1.1rem;
    margin: 0;
}

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

.mini-card,
.project-card,
.timeline-card {
    border: 1px solid rgba(157, 78, 221, 0.25);
    border-radius: 14px;
    padding: 1rem;
    background: rgba(8, 15, 28, 0.75);
}

.timeline-grid {
    display: grid;
    gap: 1rem;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.85rem;
}

.chip {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(0, 240, 255, 0.35);
    background: rgba(0, 240, 255, 0.08);
    color: var(--text-color);
    padding: 0.35rem 0.6rem;
    font-size: 0.92rem;
}

.site-footer {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    text-align: center;
    color: var(--muted-color);
}

@media (max-width: 880px) {
    .hero { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .site-header { flex-direction: column; align-items: flex-start; }
    .site-nav { width: 100%; justify-content: space-between; }
    .portfolio-shell { width: min(100vw - 0.75rem, 1200px); }
}