:root {
    --bg: #020202;
    --bg-soft: #0a0a0a;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-strong: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.14);
    --text: #f5f7fa;
    --muted: #adb2b7;
    --accent: #8bd3e6;
    --accent-strong: #57bdd8;
    --danger: #f2a1a1;
    --radius: 18px;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at 10% 15%, rgba(139, 211, 230, 0.08), transparent 36%),
        radial-gradient(circle at 90% 4%, rgba(139, 211, 230, 0.04), transparent 28%),
        var(--bg);
    font-family: "Space Grotesk", "Segoe UI", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration-color: rgba(139, 211, 230, 0.6);
    text-underline-offset: 2px;
}

a:hover {
    color: var(--accent-strong);
}

#tsparticles {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.site-header,
main,
.site-footer {
    position: relative;
    z-index: 1;
    width: min(1120px, 92%);
    margin-left: auto;
    margin-right: auto;
}

.site-header {
    position: sticky;
    top: 0;
    padding-top: 0.9rem;
    padding-bottom: 0.6rem;
    backdrop-filter: blur(10px);
    z-index: 10;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(6, 6, 6, 0.72);
    box-shadow: var(--shadow);
    padding: 0.6rem 0.75rem;
}

.brand {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text);
    text-decoration: none;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
}

.site-nav {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.36rem 0.75rem;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="true"] {
    color: var(--text);
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.05);
}

main {
    padding-top: 1.4rem;
    padding-bottom: 1.5rem;
}

section {
    scroll-margin-top: 6.8rem;
}

.section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(150deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    box-shadow: var(--shadow);
    padding: clamp(1.2rem, 2.8vw, 2.2rem);
    margin-bottom: 1.25rem;
}

.section-heading {
    margin-bottom: 1rem;
}

.eyebrow {
    margin: 0;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.13em;
    color: #d5dce4;
}

h1,
h2,
h3 {
    margin-top: 0.25rem;
    margin-bottom: 0.4rem;
    line-height: 1.18;
}

h1 {
    font-size: clamp(2rem, 7vw, 3.6rem);
    letter-spacing: -0.025em;
}

h2 {
    font-size: clamp(1.5rem, 3.8vw, 2.2rem);
    letter-spacing: -0.015em;
}

h3 {
    font-size: 1.18rem;
}

p {
    margin-top: 0.5rem;
    margin-bottom: 0;
    color: var(--muted);
}

.hero {
    display: grid;
    grid-template-columns: 1.3fr 0.9fr;
    gap: 1.5rem;
    align-items: center;
}

.lead {
    color: #dce1e8;
    max-width: 65ch;
}

.sublead {
    max-width: 62ch;
}

.hero-visual img {
    width: min(100%, 420px);
    border-radius: 22px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: block;
    margin-left: auto;
}

.hero-actions {
    display: flex;
    gap: 0.65rem;
    flex-wrap: wrap;
    margin-top: 1.1rem;
}

.btn {
    display: inline-block;
    text-decoration: none;
    border-radius: 999px;
    padding: 0.57rem 1.05rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid var(--border);
    transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    color: #071218;
    background: var(--accent);
    border-color: rgba(139, 211, 230, 0.7);
}

.btn-primary:hover {
    color: #071218;
    background: var(--accent-strong);
}

.btn-ghost {
    color: var(--text);
    background: rgba(255, 255, 255, 0.04);
}

.quick-facts {
    margin: 1rem 0 0;
    padding-left: 1.15rem;
    color: var(--muted);
}

.quick-facts li {
    margin-bottom: 0.25rem;
}

.metric-grid,
.card-grid,
.stack-grid,
.contact-grid,
.timeline-grid {
    display: grid;
    gap: 0.9rem;
}

.metric-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card,
.project-card,
.stack-block,
.contact-item {
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 4px);
    background: var(--surface);
    padding: 0.9rem;
}

.metric-value {
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.metric-label {
    color: #ced4db;
    margin-top: 0.35rem;
}

.proof-line {
    margin-top: 0.55rem;
    color: #c4cbd2;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.8rem;
}

.pending-proof {
    display: inline-block;
    margin-top: 0.5rem;
    border: 1px dashed rgba(242, 161, 161, 0.5);
    color: var(--danger);
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    font-size: 0.73rem;
    font-family: "IBM Plex Mono", monospace;
}

.card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.subheading {
    margin-top: 1.4rem;
    margin-bottom: 0.7rem;
}

.card-top {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: 0.4rem;
}

.badge {
    display: inline-block;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.11rem 0.55rem;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.badge.research {
    color: #b2f6d6;
    border-color: rgba(178, 246, 214, 0.45);
}

.badge.awarded {
    color: #ffd9a9;
    border-color: rgba(255, 217, 169, 0.45);
}

.badge.prototype {
    color: #c2ddff;
    border-color: rgba(194, 221, 255, 0.44);
}

.badge.dev {
    color: #d2cbff;
    border-color: rgba(210, 203, 255, 0.42);
}

.badge.concept {
    color: #f2b7e0;
    border-color: rgba(242, 183, 224, 0.4);
}

.project-points {
    margin: 0.7rem 0 0;
    padding-left: 1rem;
    color: #cfd5dc;
}

.project-points li {
    margin-bottom: 0.24rem;
}

.link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.8rem;
}

.stack-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stack-list {
    margin: 0.65rem 0 0;
    padding-left: 1rem;
    color: #d2d8df;
}

.stack-list li {
    margin-bottom: 0.2rem;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 0.85rem;
}

.chip {
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.25rem 0.68rem;
    color: #d6dce3;
    background: rgba(255, 255, 255, 0.03);
    font-size: 0.84rem;
}

.contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 0.55rem;
}

.timeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contact-item {
    margin: 0;
    display: flex;
    align-items: center;     /* Centers vertically */
    
}

.contact-item p {
    color: #c8d0d8;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.88rem;
}

.contact-item a {
    color: #c8d0d8;
    text-decoration: none;
    border-bottom: 1px solid rgba(139, 211, 230, 0.45);
    transition: color 180ms ease, border-color 180ms ease;
}

.contact-item a:hover,
.contact-item a:focus-visible {
    color: var(--accent);
    border-bottom-color: rgba(139, 211, 230, 0.85);
}

.site-footer {
    margin-bottom: 1rem;
}

.site-footer p {
    margin: 0;
    color: #a9b0b8;
    text-align: right;
    font-size: 0.9rem;
}

.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 420ms ease, transform 420ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1080px) {
    .metric-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .stack-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .site-header {
        position: static;
    }

    .hero {
        grid-template-columns: 1fr;
    }

    .hero-visual img {
        margin-left: 0;
    }

    .card-grid,
    .contact-grid,
    .timeline-grid {
        grid-template-columns: 1fr;
    }

    .site-footer p {
        text-align: left;
    }
}

@media (max-width: 620px) {
    .nav-wrap {
        border-radius: 20px;
        align-items: flex-start;
        flex-direction: column;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .metric-grid,
    .stack-grid {
        grid-template-columns: 1fr;
    }
}