/* =========================================================
   Jack Nelson - Portfolio
   Modern dark theme
   ========================================================= */

:root {
    --bg: #0a0c11;
    --bg-2: #0f131b;
    --surface: #141923;
    --surface-2: #1a2030;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);

    --text: #e8ecf3;
    --text-dim: #9aa6bd;
    --text-faint: #6b7689;

    --accent: #5eead4;
    --accent-2: #7c8bff;
    --accent-3: #b46cff;
    --grad: linear-gradient(120deg, #5eead4 0%, #7c8bff 50%, #b46cff 100%);

    --radius: 16px;
    --radius-sm: 10px;
    --maxw: 1080px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);

    --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 28px;
}

/* ---------- Background decoration ---------- */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

.bg-glow {
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 700px;
    z-index: -1;
    background:
        radial-gradient(circle at 30% 30%, rgba(94, 234, 212, 0.16), transparent 55%),
        radial-gradient(circle at 70% 40%, rgba(124, 139, 255, 0.18), transparent 55%),
        radial-gradient(circle at 50% 80%, rgba(180, 108, 255, 0.12), transparent 60%);
    filter: blur(40px);
    pointer-events: none;
}

/* ---------- Navigation ---------- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease), backdrop-filter 0.3s;
    border-bottom: 1px solid transparent;
}
.nav.scrolled {
    background: rgba(10, 12, 17, 0.72);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--border);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 600; }
.brand-mark {
    display: grid; place-items: center;
    width: 34px; height: 34px;
    border-radius: 9px;
    background: var(--grad);
    color: #0a0c11;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}
.brand-name { font-family: 'Space Grotesk', sans-serif; letter-spacing: 0.2px; }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
    font-size: 0.92rem;
    color: var(--text-dim);
    position: relative;
    transition: color 0.2s;
}
.nav-links a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    left: 0; bottom: -6px;
    width: 0; height: 2px;
    background: var(--grad);
    border-radius: 2px;
    transition: width 0.25s var(--ease);
}
.nav-links a:not(.nav-cta):hover,
.nav-links a.active { color: var(--text); }
.nav-links a.active::after,
.nav-links a:not(.nav-cta):hover::after { width: 100%; }

.nav-cta {
    padding: 8px 18px;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    color: var(--text) !important;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.nav-cta:hover { border-color: var(--accent); background: rgba(94, 234, 212, 0.08); transform: translateY(-1px); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s var(--ease), opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
}
.hero-inner { max-width: 820px; }
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 0.85rem;
    color: var(--text-dim);
    padding: 7px 15px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.02);
    margin-bottom: 26px;
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.6);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.5); }
    70% { box-shadow: 0 0 0 9px rgba(94, 234, 212, 0); }
    100% { box-shadow: 0 0 0 0 rgba(94, 234, 212, 0); }
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    line-height: 1.08;
    font-weight: 700;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}
.grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.rotator {
    color: var(--accent);
    border-bottom: 3px solid rgba(94, 234, 212, 0.4);
    transition: opacity 0.3s;
}
.hero-sub {
    font-size: clamp(1.05rem, 2vw, 1.22rem);
    color: var(--text-dim);
    max-width: 640px;
    margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.96rem;
    cursor: pointer;
    transition: transform 0.2s var(--ease), box-shadow 0.25s, background 0.25s, border-color 0.2s;
    border: 1px solid transparent;
}
.btn-primary {
    background: var(--grad);
    color: #0a0c11;
    box-shadow: 0 10px 30px -10px rgba(124, 139, 255, 0.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(124, 139, 255, 0.7); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--border-strong);
    color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); background: rgba(94, 234, 212, 0.06); transform: translateY(-2px); }
.btn-lg { padding: 16px 34px; font-size: 1.05rem; }

.hero-meta { display: flex; gap: 48px; flex-wrap: wrap; }
.hero-meta-item { display: flex; flex-direction: column; }
.hero-meta-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.9rem;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-meta-label { font-size: 0.86rem; color: var(--text-faint); }

.scroll-cue {
    position: absolute;
    bottom: 32px; left: 50%;
    transform: translateX(-50%);
    width: 26px; height: 42px;
    border: 2px solid var(--border-strong);
    border-radius: 14px;
    display: grid;
    place-items: start center;
    padding-top: 8px;
}
.scroll-cue span {
    width: 4px; height: 8px;
    border-radius: 4px;
    background: var(--accent);
    animation: scrollcue 1.8s infinite;
}
@keyframes scrollcue {
    0% { opacity: 0; transform: translateY(0); }
    40% { opacity: 1; }
    100% { opacity: 0; transform: translateY(14px); }
}

/* ---------- Sections ---------- */
.section { padding: 100px 0; position: relative; }
.section-head { margin-bottom: 52px; }
.section-kicker {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 12px;
}
.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    font-weight: 700;
    letter-spacing: -1px;
}

/* ---------- About ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 56px;
    align-items: start;
}
.about-photo { position: relative; }
.about-photo img {
    width: 100%;
    border-radius: var(--radius);
    display: block;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border: 1px solid var(--border);
}
.about-photo-ring {
    position: absolute;
    inset: -12px;
    border-radius: calc(var(--radius) + 12px);
    background: var(--grad);
    opacity: 0.25;
    z-index: -1;
    filter: blur(14px);
}
.about-text .lead { font-size: 1.18rem; color: var(--text); margin-bottom: 18px; }
.about-text p { color: var(--text-dim); margin-bottom: 16px; }
.about-text strong { color: var(--text); }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.about-tags span {
    font-size: 0.86rem;
    padding: 7px 15px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-dim);
}

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 5px; top: 6px; bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2) 50%, var(--accent-3));
    opacity: 0.4;
}
.tl-item { position: relative; margin-bottom: 26px; }
.tl-item:last-child { margin-bottom: 0; }
.tl-dot {
    position: absolute;
    left: -30px; top: 26px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent);
    box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.12);
}
.tl-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 28px;
    transition: transform 0.3s var(--ease), border-color 0.3s, background 0.3s;
}
.tl-card:hover {
    transform: translateX(4px);
    border-color: var(--border-strong);
    background: var(--surface-2);
}
.tl-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.tl-role { font-size: 1.15rem; font-weight: 600; font-family: 'Space Grotesk', sans-serif; }
.tl-company { color: var(--accent); font-weight: 500; font-size: 0.98rem; margin-top: 2px; }
.tl-meta { text-align: right; display: flex; flex-direction: column; gap: 3px; }
.tl-date {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-dim);
    white-space: nowrap;
}
.tl-date.current { color: var(--accent); }
.tl-loc { font-size: 0.8rem; color: var(--text-faint); }
.tl-points { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.tl-points li {
    position: relative;
    padding-left: 22px;
    color: var(--text-dim);
    font-size: 0.95rem;
}
.tl-points li::before {
    content: '';
    position: absolute;
    left: 2px; top: 9px;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.7;
}
.tl-stack { display: flex; flex-wrap: wrap; gap: 8px; }
.tl-stack span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    padding: 4px 11px;
    border-radius: 7px;
    background: rgba(124, 139, 255, 0.1);
    border: 1px solid rgba(124, 139, 255, 0.18);
    color: #aeb6ff;
}

/* ---------- Skills ---------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: transform 0.3s var(--ease), border-color 0.3s;
}
.skill-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.skill-cat {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.05rem;
    margin-bottom: 16px;
    color: var(--text);
}
.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chips span {
    font-size: 0.88rem;
    padding: 7px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    color: var(--text-dim);
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.skill-card:hover .chips span:hover,
.chips span:hover { color: var(--text); border-color: var(--accent); background: rgba(94, 234, 212, 0.06); }
.chips-sm span { font-size: 0.8rem; padding: 5px 12px; }

/* ---------- Projects ---------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}
.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}
.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad);
    opacity: 0;
    transition: opacity 0.3s;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.project-card:hover::before { opacity: 1; }
.project-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.project-title { font-family: 'Space Grotesk', sans-serif; font-size: 1.3rem; font-weight: 700; }
.project-badge {
    font-size: 0.78rem;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(94, 234, 212, 0.1);
    border: 1px solid rgba(94, 234, 212, 0.2);
    color: var(--accent);
    white-space: nowrap;
}
.project-desc { color: var(--text-dim); margin-bottom: 20px; font-size: 0.96rem; }

/* ---------- Education ---------- */
.edu-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
}
.edu-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 22px;
}
.edu-school { font-family: 'Space Grotesk', sans-serif; font-size: 1.25rem; font-weight: 700; }
.edu-degree { color: var(--accent); margin-top: 3px; }
.edu-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--text-faint);
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

/* ---------- Contact ---------- */
.contact { padding-bottom: 110px; }
.contact-inner {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 56px 40px;
    position: relative;
    overflow: hidden;
}
.contact-inner::before {
    content: '';
    position: absolute;
    top: -50%; left: 50%;
    transform: translateX(-50%);
    width: 500px; height: 300px;
    background: radial-gradient(circle, rgba(124, 139, 255, 0.16), transparent 70%);
    pointer-events: none;
}
.contact-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.5px;
    margin: 12px 0 16px;
}
.contact-sub { color: var(--text-dim); margin-bottom: 32px; }
.contact-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 26px;
    flex-wrap: wrap;
    margin-top: 32px;
    color: var(--text-dim);
}
.contact-links a, .contact-loc {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    transition: color 0.2s;
}
.contact-links a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-faint);
    font-size: 0.88rem;
    flex-wrap: wrap;
    gap: 10px;
}
.footer-top { transition: color 0.2s; }
.footer-top:hover { color: var(--accent); }

/* ---------- Reveal animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
    .about-grid { grid-template-columns: 1fr; gap: 32px; }
    .about-photo { max-width: 280px; }
    .skills-grid, .projects-grid { grid-template-columns: 1fr; }

    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 70px; left: 0; right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background: rgba(13, 16, 23, 0.97);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border);
        padding: 8px 28px 20px;
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.35s var(--ease), opacity 0.3s;
    }
    .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-links a { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--border); }
    .nav-links a:last-child { border-bottom: none; }
    .nav-cta { width: 100%; text-align: center; margin-top: 10px; padding: 12px 18px; }
}

@media (max-width: 560px) {
    .container { padding: 0 20px; }
    .section { padding: 70px 0; }
    .hero-meta { gap: 28px; }
    .tl-card { padding: 22px 20px; }
    .tl-meta { text-align: left; }
    .contact-inner { padding: 40px 24px; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
}