:root {
    --bg: #050507;
    --bg-alt: #08080f;
    --bg-card: rgba(0, 0, 0, 0.35);
    --accent: #00d4ff;
    --accent-2: #6c63ff;
    --text: #ffffff;
    --text-muted: #8899bb;
    --border: rgba(0,212,255,0.18);
    --border-subtle: rgba(255,255,255,0.07);
    --font: 'Courier New', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

/* Grain overlay — above everything */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.028;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 128px 128px;
}

::selection { background: var(--accent); color: #000; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.3); }

/* ─── Three.js canvas — fixed full-page background ─── */
#bg-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ─── Navigation ─── */
#nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.75rem 3rem;
    transition: background 0.4s ease, backdrop-filter 0.4s ease, padding 0.4s ease;
}

#nav.scrolled {
    background: rgba(5,5,7,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    padding-top: 1.1rem;
    padding-bottom: 1.1rem;
}

.nav-logo {
    font-size: 1rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    cursor: default;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -3px; left: 0; right: 100%;
    height: 1px;
    background: var(--accent);
    transition: right 0.25s ease;
}

.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { right: 0; }

/* ─── Lang switch ─── */
.lang-switch {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border-subtle);
}

.lang-switch a {
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.lang-switch a.active { color: var(--accent); }
.lang-switch a:hover  { color: var(--text); }

/* ─── Hero ─── */
#hero {
    position: relative;
    z-index: 1;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* no background — canvas fully visible here */
}

/* Radial vignette specific to hero */
#hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 65% 70% at 50% 50%, transparent 35%, rgba(5,5,7,0.65) 100%);
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 880px;
    padding: 0 2rem;
}

.hero-pre {
    font-size: 1rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.3s forwards;
}

.hero-name {
    font-size: clamp(2.8rem, 9vw, 7rem);
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1;
    margin-bottom: 1.8rem;
    opacity: 0;
    animation: fadeUp 0.9s ease 0.55s forwards;
}

.hero-divider {
    width: 48px;
    height: 1px;
    background: var(--accent);
    margin: 0 auto 1.6rem;
    opacity: 0;
    transform-origin: center;
    animation: scaleIn 0.6s ease 0.85s forwards;
}

.hero-role {
    font-size: clamp(1rem, 2.2vw, 1.2rem);
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.6rem;
    opacity: 0;
    animation: fadeUp 0.8s ease 1s forwards;
}

.hero-role .sep { color: var(--accent); margin: 0 0.5em; }

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    max-width: 500px;
    margin: 0 auto 2.8rem;
    line-height: 1.9;
    opacity: 0;
    animation: fadeUp 0.8s ease 1.15s forwards;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease 1.35s forwards;
}

.btn {
    display: inline-block;
    padding: 0.82rem 2.2rem;
    font-family: var(--font);
    font-size: 0.85rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: #000;
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    box-shadow: 0 0 24px rgba(0,212,255,0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    opacity: 0;
    animation: fadeIn 1s ease 2s forwards;
}

.scroll-indicator span {
    font-size: 0.78rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.scroll-line {
    width: 1px;
    height: 44px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
    animation: scrollPulse 2.2s ease-in-out infinite;
}

/* ─── Sections — semi-transparent so canvas shows through ─── */
.section {
    position: relative;
    z-index: 1;
    padding: 8rem 0;
    background: rgba(5, 5, 7, 0.55);
}

.section-alt {
    background: rgba(8, 8, 15, 0.60);
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 2.5rem;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 4.5rem;
}

.section-num {
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--accent);
    text-transform: uppercase;
    opacity: 0.75;
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2.4rem);
    font-weight: 400;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

/* ─── About ─── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4.5rem;
    align-items: start;
}

.about-text p {
    color: var(--text-muted);
    font-size: 1.08rem;
    letter-spacing: 0.03em;
    line-height: 1.9;
    margin-bottom: 1.3rem;
}

.about-text .hl { color: var(--accent); }

.terminal {
    background: rgba(7, 7, 17, 0.80);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.terminal-bar {
    background: rgba(14, 14, 28, 0.95);
    padding: 0.7rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border-bottom: 1px solid var(--border-subtle);
}

.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #ffbd2e; }
.dot-g { background: #28c840; }

.terminal-title {
    margin-left: 0.6rem;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.terminal-body { padding: 1.5rem; }

.terminal-body pre {
    font-family: var(--font);
    font-size: 0.95rem;
    line-height: 1.78;
    color: #7788bb;
}

.terminal-body .key  { color: #4fa8d0; }
.terminal-body .str  { color: #a8c080; }
.terminal-body .bool { color: #d4a0ff; }
.terminal-body .num  { color: #f0c060; }
.terminal-body .sym  { color: var(--text-muted); }

/* ─── Skills ─── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.skill-group-title {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
}

.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.tag {
    display: inline-block;
    padding: 0.35rem 0.95rem;
    font-size: 0.82rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    transition: border-color 0.2s, color 0.2s;
    cursor: default;
    background: rgba(0,0,0,0.2);
}

.tag:hover { border-color: var(--accent); color: var(--accent); }

.tag i[class^="devicon"] {
    font-size: 1rem;
    vertical-align: middle;
    margin-right: 5px;
    line-height: 1;
}

.tag-purple {
    border-color: rgba(108,99,255,0.28);
    color: #9a93ff;
}

.tag-purple:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* ─── Projects ─── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.projects-grid.solo {
    grid-template-columns: 1fr;
    max-width: 640px;
}

.project-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-subtle);
    padding: 2.2rem;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s, transform 0.3s;
    cursor: default;
    backdrop-filter: blur(6px);
    display: flex;
    flex-direction: column;
}

.project-image {
    margin: -2.2rem -2.2rem 1.8rem;
    height: 160px;
    overflow: hidden;
    flex-shrink: 0;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.75;
    transition: opacity 0.3s;
    display: block;
}

.project-card:hover .project-image img { opacity: 0.95; }

.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.project-card:hover { border-color: var(--border); transform: translateY(-3px); }
.project-card:hover::before { opacity: 1; }

.project-index {
    position: absolute;
    top: 1.4rem; right: 1.8rem;
    font-size: 3.5rem;
    font-weight: 400;
    color: rgba(255,255,255,0.04);
    line-height: 1;
    user-select: none;
}

.project-name {
    font-size: 1.35rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.project-desc {
    font-size: 1rem;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    line-height: 1.78;
    margin-bottom: 1.4rem;
}

.project-techs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.4rem;
}

.project-techs span {
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 0.2rem 0.55rem;
    border: 1px solid rgba(0,212,255,0.22);
    background: rgba(0,212,255,0.04);
}

.project-links { display: flex; gap: 1.5rem; }

.project-link {
    font-size: 0.82rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.project-link:hover { color: var(--accent); }

/* ─── Contact ─── */
.contact-wrap {
    text-align: center;
    max-width: 580px;
    margin: 0 auto;
}

.contact-lead {
    font-size: 1.12rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    line-height: 1.9;
    margin-bottom: 2.5rem;
}

.contact-email {
    display: inline-block;
    font-size: clamp(1.2rem, 2.8vw, 1.65rem);
    letter-spacing: 0.1em;
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 0.2rem;
    margin-bottom: 3rem;
    transition: color 0.2s, box-shadow 0.2s;
}

.contact-email:hover {
    color: var(--accent);
    box-shadow: 0 4px 24px rgba(0,212,255,0.15);
}

.socials { display: flex; justify-content: center; gap: 3rem; }

.social {
    font-size: 0.88rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
    position: relative;
}

.social::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 100%;
    height: 1px;
    background: var(--accent);
    transition: right 0.25s ease;
}

.social:hover { color: var(--text); }
.social:hover::after { right: 0; }

/* ─── Footer ─── */
footer {
    position: relative;
    z-index: 1;
    padding: 2rem 0;
    border-top: 1px solid var(--border-subtle);
    background: rgba(5,5,7,0.88);
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer span {
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* ─── Scroll reveal ─── */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal[data-d="1"] { transition-delay: 0.1s; }
.reveal[data-d="2"] { transition-delay: 0.2s; }
.reveal[data-d="3"] { transition-delay: 0.3s; }
.reveal[data-d="4"] { transition-delay: 0.4s; }

/* ─── Keyframes ─── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scaleX(0); }
    to   { opacity: 1; transform: scaleX(1); }
}

@keyframes scrollPulse {
    0%,100% { opacity: 0.35; transform: scaleY(1); }
    50%      { opacity: 1;    transform: scaleY(1.12); }
}

/* ─── Experience timeline ─── */
.timeline {
    position: relative;
    padding-left: 2.8rem;
    max-width: 820px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 10px;
    bottom: 3.5rem;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent), rgba(0,212,255,0.08));
}

.timeline-item {
    position: relative;
    padding-bottom: 3.5rem;
}

.timeline-item:last-child { padding-bottom: 0; }

/* dot */
.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.8rem;
    top: 8px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--bg-alt);
    border: 1px solid var(--accent);
    box-shadow: 0 0 8px rgba(0,212,255,0.25);
}

.timeline-item.current::before {
    background: var(--accent);
    animation: dotPulse 2.2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%,100% { box-shadow: 0 0 6px rgba(0,212,255,0.4); }
    50%      { box-shadow: 0 0 18px rgba(0,212,255,0.85); }
}

.job-header { margin-bottom: 0.9rem; display: flex; flex-direction: column; gap: 0.5rem; }

.job-logo {
    height: 36px;
    max-width: 120px;
    object-fit: contain;
    opacity: 0.75;
    filter: brightness(0) invert(1);
    align-self: flex-start;
}

.job-meta {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-bottom: 0.45rem;
}

.job-period {
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.job-period .accent { color: var(--accent); }

.job-company {
    font-size: 0.72rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--accent);
    opacity: 0.75;
}

.job-role {
    font-size: 1.15rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.job-desc {
    font-size: 0.96rem;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    line-height: 1.85;
    margin-bottom: 1.2rem;
}

/* ─── Hamburger button ─── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 4px;
    z-index: 110;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1px;
    background: var(--text);
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ─── Responsive ─── */
@media (max-width: 768px) {
    /* Nav */
    #nav { padding: 1.1rem 1.5rem; }

    .nav-toggle { display: flex; }

    .nav-right {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(5, 5, 7, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        z-index: 105;
    }

    .nav-right.open { display: flex; }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 2.2rem;
    }

    .nav-links a {
        font-size: 1.1rem;
        letter-spacing: 0.22em;
    }

    .lang-switch {
        border-left: none;
        border-top: 1px solid var(--border-subtle);
        padding-left: 0;
        padding-top: 1.2rem;
        gap: 1.5rem;
    }

    /* Hero */
    .hero-content { padding: 0 1.5rem; }
    .hero-pre     { font-size: 0.8rem; letter-spacing: 0.18em; }
    .hero-role    { font-size: 0.9rem; letter-spacing: 0.16em; }
    .hero-desc    { font-size: 0.97rem; }
    .scroll-indicator { display: none; }

    /* Sections */
    .section         { padding: 5rem 0; }
    .container       { padding: 0 1.5rem; }
    .section-header  { margin-bottom: 3rem; }
    .section-title   { letter-spacing: 0.1em; }

    /* About */
    .about-grid     { grid-template-columns: 1fr; gap: 2.5rem; }
    .terminal-body  { padding: 1rem; overflow-x: auto; }
    .terminal-body pre { font-size: 0.85rem; }

    /* Timeline */
    .timeline               { padding-left: 2rem; }
    .timeline-item::before  { left: -2rem; }
    .job-role               { letter-spacing: 0.06em; }

    /* Skills */
    .skills-grid       { grid-template-columns: 1fr; gap: 2.5rem; }
    .skill-group-title { letter-spacing: 0.18em; }

    /* Projects */
    .projects-grid { grid-template-columns: 1fr; }
    .project-name  { letter-spacing: 0.12em; }

    /* Contact */
    .contact-email { font-size: 1.1rem; letter-spacing: 0.06em; word-break: break-all; }

    /* Footer */
    footer .container { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 480px) {
    #nav { padding: 1rem 1.2rem; }

    .section        { padding: 4rem 0; }
    .container      { padding: 0 1.2rem; }
    .section-header { gap: 0.6rem; margin-bottom: 2.5rem; }

    .hero-content   { padding: 0 1.2rem; }
    .hero-pre       { font-size: 0.72rem; letter-spacing: 0.12em; }
    .hero-role      { font-size: 0.82rem; letter-spacing: 0.1em; }
    .hero-cta       { flex-direction: column; align-items: center; }
    .btn            { width: 220px; text-align: center; }

    .timeline              { padding-left: 1.8rem; }
    .timeline-item::before { left: -1.8rem; }

    .project-card  { padding: 1.6rem; }
    .project-index { font-size: 2.5rem; }

    .contact-email { font-size: 0.95rem; letter-spacing: 0.03em; }
    .socials       { gap: 2rem; }
}