:root {
    --bg: #0b0c0f;
    --panel: #13151c;
    --soft: #0f1117;
    --ink: #f4f6ff;
    --muted: #9aa3b2;
    --accent: #4f7cff;
    --ring: rgba(79,124,255,.35);
    --radius: 16px;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --maxw: 1100px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
    margin: 0;
    font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
    color: var(--ink);
    background: #000;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 24px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);

    background: rgba(11,12,15,0.75);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    max-width: var(--maxw);
    margin: 12px auto;
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}
.nav { display: flex; align-items: center; gap: 16px; padding: 10px 16px; }
.logo { margin: 0; font-size: 18px; }
.nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 10px;
}
.nav a:hover { background: rgba(255,255,255,.06); color: var(--ink); }
.btn {
    background: var(--panel);
    color: var(--ink);
    border: 1px solid rgba(255,255,255,.12);
    padding: 8px 12px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}
.btn:focus { outline: none; box-shadow: 0 0 0 4px var(--ring); }
.spacer { flex: 1; }


.section { padding: 28px 0; }
.eyebrow {
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
    font-size: 13px;
    margin: 0 0 8px;
}
.h2 { font-size: clamp(24px,4vw,36px); line-height: 1.2; margin: 0 0 8px; }
.muted { color: var(--muted); }


.card {
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
}
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.chip {
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.10);
}


.xp-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    align-items: start;
}
@media (max-width: 900px) { .xp-layout { grid-template-columns: 1fr; } }

.xp-list { display: flex; flex-direction: column; gap: 12px; }
.xp-item {
    padding: 14px 16px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.08);
    color: var(--ink);
    text-align: left;
    cursor: pointer;
}
.xp-item:hover { background: #171924; }
.xp-item.active { background: #0e1a3a; border-color: #223869; }
.xp-item h4 { margin: 0 0 2px; font-size: 15px; }
.xp-item .sub { color: var(--muted); font-size: 12px; }

.xp-detail { min-height: 320px; }
.xp-detail .header { display: flex; align-items: flex-start; }
.xp-detail .title { font-size: 20px; margin: 0; }
.xp-detail .meta { margin-left: auto; color: var(--muted); }
.hr { height: 2px; background: #9d2b2b; margin: 12px 0; opacity: .7; }

ul.tight { margin: 8px 0 0 20px; }
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.badge {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 999px;
    background: #0f2b11;
    color: #a9f3b4;
    border: 1px solid #284b30;
}
.techs { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 14px; opacity: .95; }
.tech {
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.1);
    background: rgba(255,255,255,.04);
}

#projects .xp-item.active { background: #102332; border-color: #29577a; }
#projects .hr { background: #29577a; }


.hero-bg {
    position: relative;
    background: url("img/about.jpeg") center top / cover no-repeat;
    color: #fff;
    border-radius: 12px;
    overflow: hidden;


    padding: 140px 24px 180px;
}


.hero-bg .overlay {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 0;
}
.hero-bg .about,
.hero-bg .about-grid,
.hero-bg .bio { position: relative; z-index: 1; }
.hero-bg::before { background: rgba(0,0,0,0.35); }

.about-grid {
    display: grid;
    gap: 24px;
    align-items: center;
    grid-template-columns: 160px 1fr;
}
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; } }

.headshot {
    width: 160px; height: 160px; object-fit: cover;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,.18);
    box-shadow: 0 12px 30px rgba(0,0,0,.35);
    background: rgba(0,0,0,.2);
}

.site-footer { padding: 36px 24px 60px; text-align: center; color: var(--muted); }

.contact-card p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 8px 0;
}

.contact-card i {
    color: var(--accent);
    font-size: 18px;
    width: 22px;
    text-align: center;
}



.contact-icons {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding: 20px;
}

.contact-icon {
    font-size: 32px;
    color: var(--muted);
    transition: color 0.3s ease, transform 0.2s ease;
}

.contact-icon:hover {
    transform: translateY(-4px);
}


.contact-icon.email:hover { color: #fa6c08; }
.contact-icon.linkedin:hover { color: #0a66c2; }
.contact-icon.github:hover { color: #fff; }
.contact-icon.location:hover { color: #ff5252; }


.paper-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
}

.paper-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.paper-title {
    font-size: 18px;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.paper-links {
    display: flex;
    gap: 16px;
    margin-top: 6px;
}

.paper-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.paper-link:hover {
    color: var(--accent);
}
#projects .xp-layout { gap: 14px; }

#projects .xp-detail {
    min-height: unset;
}

#projects .xp-detail.card {
    padding: 12px 14px;
}

#projects .xp-detail .header {
    margin-bottom: 6px;
}

#projects .hr {
    margin: 8px 0;
}

#projects ul.tight {
    margin: 6px 0 0 18px;
}

#projects .techs {
    margin-top: 10px;
    gap: 10px;
}

#projects .badges {
    margin-top: 8px;
    gap: 6px;
}

#projects .xp-item {
    padding: 12px 14px;
}


.paper-list {
    padding: 16px;
    gap: 12px;
}

.paper-item {
    gap: 6px;
}

.paper-title {
    font-size: 18px;
    margin: 0 0 4px 0;
}

.paper-item p {
    margin: 2px 0;
    line-height: 1.4;
}

.paper-links {
    margin-top: 4px;
    gap: 12px;
}