/* ── TOKENS ─────────────────────────────────────────────── */
:root {
    --bg:        #0b0d11;
    --bg2:       #101318;
    --surface:   #161b22;
    --border:    #21262d;
    --accent:    #7ee787;   /* GitHub-green — nod to the source */
    --accent2:   #58a6ff;
    --text:      #e6edf3;
    --muted:     #7d8590;
    --dim:       #30363d;

    --font-display: 'Space Mono', monospace;
    --font-body:    'Space Grotesk', sans-serif;

    --ease: cubic-bezier(.16,1,.3,1);
    --r: 8px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ── SCROLLBAR ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--dim); border-radius: 2px; }

/* ── NOISE OVERLAY ──────────────────────────────────────── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 999;
    opacity: .4;
}

/* ── NAV ────────────────────────────────────────────────── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(1.5rem, 5vw, 4rem);
    height: 64px;
    background: rgba(11,13,17,.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: .9rem;
    color: var(--accent);
    letter-spacing: .05em;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-size: .85rem;
    color: var(--muted);
    text-decoration: none;
    transition: color .2s;
    letter-spacing: .03em;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
    font-size: .8rem;
    font-family: var(--font-display);
    padding: .45rem 1.1rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: var(--r);
    text-decoration: none;
    transition: background .2s, color .2s;
}
.nav-cta:hover { background: var(--accent); color: var(--bg); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s var(--ease), opacity .2s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
    display: none;
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 99;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
    font-size: 1.4rem;
    color: var(--text);
    text-decoration: none;
}

/* ── HERO ───────────────────────────────────────────────── */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 clamp(1.5rem, 8vw, 8rem);
    position: relative;
    overflow: hidden;
}

/* grid background */
#hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 80%);
    opacity: .35;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 820px;
}

.hero-label {
    font-family: var(--font-display);
    font-size: .75rem;
    color: var(--accent);
    letter-spacing: .18em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp .6s var(--ease) .2s forwards;
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -.02em;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .35s forwards;
}

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

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--muted);
    margin-bottom: 2.5rem;
    max-width: 520px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .5s forwards;
}

/* typewriter */
.typewriter {
    color: var(--accent2);
    font-family: var(--font-display);
    font-size: clamp(.9rem, 2vw, 1.1rem);
    margin-bottom: 3rem;
    min-height: 1.6em;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .65s forwards;
}
.typewriter::after {
    content: '|';
    animation: blink .7s step-end infinite;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .8s forwards;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.8rem;
    background: var(--accent);
    color: var(--bg);
    font-family: var(--font-display);
    font-size: .85rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--r);
    transition: transform .2s var(--ease), box-shadow .2s;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(126,231,135,.25);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.8rem;
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font-display);
    font-size: .85rem;
    text-decoration: none;
    border-radius: var(--r);
    transition: border-color .2s, background .2s;
}
.btn-ghost:hover { border-color: var(--accent2); background: rgba(88,166,255,.06); }

/* floating glow */
.hero-glow {
    position: absolute;
    right: -10%;
    top: 10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(126,231,135,.08) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 5s ease-in-out infinite alternate;
}

/* ── SECTIONS COMMON ────────────────────────────────────── */
section {
    padding: clamp(5rem, 10vh, 8rem) clamp(1.5rem, 8vw, 8rem);
}

.section-label {
    font-family: var(--font-display);
    font-size: .72rem;
    color: var(--accent);
    letter-spacing: .18em;
    text-transform: uppercase;
    margin-bottom: .75rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.section-sub {
    color: var(--muted);
    max-width: 520px;
    margin-bottom: 3.5rem;
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 0 clamp(1.5rem, 8vw, 8rem);
}

/* ── ABOUT ──────────────────────────────────────────────── */
#about .about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text p {
    color: var(--muted);
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
}

.about-text p strong { color: var(--text); }

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.5rem;
    transition: border-color .2s;
}
.stat-card:hover { border-color: var(--accent); }

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: .25rem;
}

.stat-label {
    font-size: .8rem;
    color: var(--muted);
}

/* ── SKILLS ─────────────────────────────────────────────── */
#skills { background: var(--bg2); }

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.skill-group {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.75rem;
    transition: border-color .3s, transform .3s var(--ease);
}
.skill-group:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.skill-group-icon {
    font-size: 1.6rem;
    margin-bottom: .75rem;
}

.skill-group-title {
    font-family: var(--font-display);
    font-size: .85rem;
    color: var(--accent);
    letter-spacing: .08em;
    margin-bottom: 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.skill-tag {
    font-family: var(--font-display);
    font-size: .72rem;
    padding: .3rem .7rem;
    background: var(--bg);
    border: 1px solid var(--dim);
    border-radius: 4px;
    color: var(--muted);
    letter-spacing: .04em;
}

/* ── PROJECTS ───────────────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: border-color .3s, transform .3s var(--ease);
    position: relative;
    overflow: hidden;
}
.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s var(--ease);
}
.project-card:hover {
    border-color: var(--dim);
    transform: translateY(-4px);
}
.project-card:hover::before { transform: scaleX(1); }

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

.project-icon { font-size: 1.6rem; }

.project-links { display: flex; gap: .75rem; }
.project-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: .8rem;
    font-family: var(--font-display);
    transition: color .2s;
}
.project-links a:hover { color: var(--accent); }

.project-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: .5rem;
}

.project-desc {
    font-size: .9rem;
    color: var(--muted);
    flex: 1;
    margin-bottom: 1.25rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

.project-tag {
    font-family: var(--font-display);
    font-size: .68rem;
    padding: .25rem .6rem;
    border-radius: 4px;
    letter-spacing: .04em;
}
.tag-py  { background: rgba(55,118,171,.15);  color: #4b9cd3; border: 1px solid rgba(55,118,171,.3); }
.tag-ml  { background: rgba(255,165,0,.1);     color: #f5a623; border: 1px solid rgba(255,165,0,.2); }
.tag-html{ background: rgba(227,76,38,.1);     color: #e34f26; border: 1px solid rgba(227,76,38,.2); }
.tag-sh  { background: rgba(126,231,135,.1);   color: var(--accent); border: 1px solid rgba(126,231,135,.2); }
.tag-js  { background: rgba(240,219,79,.1);    color: #f0db4f; border: 1px solid rgba(240,219,79,.2); }

/* ── CONTACT ────────────────────────────────────────────── */
#contact { background: var(--bg2); }

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    text-decoration: none;
    color: var(--text);
    font-size: .9rem;
    transition: border-color .2s, transform .2s var(--ease);
}
.contact-link:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.contact-link-icon {
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg);
    border-radius: 6px;
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-link-info { flex: 1; }
.contact-link-label { font-size: .72rem; color: var(--muted); display: block; }
.contact-link-value { font-family: var(--font-display); font-size: .82rem; }

/* contact form */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: .5rem; }

.form-group label {
    font-family: var(--font-display);
    font-size: .72rem;
    color: var(--muted);
    letter-spacing: .08em;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: .85rem 1rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: .95rem;
    outline: none;
    transition: border-color .2s;
    resize: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }

.form-group textarea { min-height: 130px; }

.btn-send {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .85rem 2rem;
    background: var(--accent);
    color: var(--bg);
    font-family: var(--font-display);
    font-size: .85rem;
    font-weight: 700;
    border: none;
    border-radius: var(--r);
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .2s;
    align-self: flex-start;
}
.btn-send:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(126,231,135,.25);
}

/* success toast */
.toast {
    position: fixed;
    bottom: 2rem; right: 2rem;
    background: var(--surface);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-display);
    font-size: .85rem;
    padding: 1rem 1.5rem;
    border-radius: var(--r);
    transform: translateY(100px);
    opacity: 0;
    transition: transform .4s var(--ease), opacity .3s;
    z-index: 200;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ── FOOTER ─────────────────────────────────────────────── */
footer {
    padding: 2rem clamp(1.5rem, 8vw, 8rem);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copy {
    font-size: .8rem;
    color: var(--muted);
    font-family: var(--font-display);
}

.footer-socials {
    display: flex;
    gap: 1.25rem;
}
.footer-socials a {
    color: var(--muted);
    text-decoration: none;
    font-size: .8rem;
    font-family: var(--font-display);
    transition: color .2s;
}
.footer-socials a:hover { color: var(--accent); }

/* ── REVEAL ANIMATION ───────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

/* ── KEYFRAMES ──────────────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: none; }
}
@keyframes blink {
    50% { opacity: 0; }
}
@keyframes pulse {
    from { opacity: .6; transform: scale(1); }
    to   { opacity: 1; transform: scale(1.08); }
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .hamburger { display: flex; }

    #about .about-grid,
    .contact-wrapper { grid-template-columns: 1fr; gap: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}