/* ── LIGHT THEME (default) ── */
:root {
    --bg: #F7F7F5;
    --bg2: #F4F4F2;
    --bg3: #F0F0EE;
    --accent: #1B2A4A;
    --accent2: #0F1C33;
    --cream: #111111;
    --muted: #555555;
    --border: #E2E2E2;
    --card: #FFFFFF;
    --tag-bg: #EEF1F6;
}

/* ── DARK THEME ── */
[data-theme="dark"] {
    --bg: #0D0F14;
    --bg2: #121418;
    --bg3: #17191E;
    --accent: #4A7BCC;
    --accent2: #5A8BDC;
    --cream: #F0F0EE;
    --muted: #9A9A98;
    --border: #1E2025;
    --card: #0D0F14;
    --tag-bg: #1A1D28;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--cream);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
    transition: background .3s ease, color .3s ease;
}

/* ── CURSOR ── */
.cursor {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    transition: transform .15s ease, width .2s, height .2s, background .2s;
    mix-blend-mode: difference;
    opacity: .7;
}

.cursor.hover {
    width: 36px;
    height: 36px;
    background: var(--accent2);
}

/* ── NAV ── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.4rem 4rem;
    border-bottom: 1px solid transparent;
    transition: background .3s, border-color .3s, backdrop-filter .3s;
}

nav.scrolled {
    background: rgba(247, 247, 245, .9);
    border-color: var(--border);
    backdrop-filter: blur(12px);
}

[data-theme="dark"] nav.scrolled {
    background: rgba(13, 15, 20, .9);
}

/* ── THEME TOGGLE ── */
#theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--cream);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: border-color .2s, color .2s, transform .2s, background .2s;
    flex-shrink: 0;
}

#theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: rotate(20deg) scale(1.08);
}

.nav-logo {
    font-family: Impact, Arial Black, sans-serif;
    font-size: 1.5rem;
    letter-spacing: .1em;
    color: var(--accent);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2.4rem;
    list-style: none;
}

.nav-links a {
    font-size: .85rem;
    font-weight: 500;
    letter-spacing: .08em;
    color: var(--muted);
    text-decoration: none;
    text-transform: uppercase;
    transition: color .2s;
}

.nav-links a:hover,
[data-theme="dark"] .nav-links a:hover {
    color: var(--cream);
}

/* ── HERO ── */
#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 0 4rem 6rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 60% 60% at 75% 30%, rgba(27, 42, 74, .04) 0%, transparent 65%),
        radial-gradient(ellipse 40% 40% at 15% 80%, rgba(27, 42, 74, .02) 0%, transparent 60%);
}

[data-theme="dark"] .hero-bg {
    background:
        radial-gradient(ellipse 60% 60% at 75% 30%, rgba(74, 123, 204, .06) 0%, transparent 65%),
        radial-gradient(ellipse 40% 40% at 15% 80%, rgba(74, 123, 204, .03) 0%, transparent 60%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: .03;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-family: 'Courier New', monospace;
    font-size: .78rem;
    color: var(--accent);
    border: 1px solid rgba(27, 42, 74, .25);
    padding: .3rem .8rem;
    border-radius: 2px;
    margin-bottom: 2rem;
    animation: fadeUp .6s ease both;
}

.hero-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

.hero-name {
    font-family: Impact, Arial Black, sans-serif;
    font-size: clamp(5rem, 12vw, 11rem);
    line-height: .92;
    letter-spacing: .02em;
    color: var(--cream);
    animation: fadeUp .6s .15s ease both;
}

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

.hero-sub {
    font-size: 1.15rem;
    color: var(--cream);
    max-width: 560px;
    margin-top: 2rem;
    font-weight: 300;
    line-height: 1.7;
    animation: fadeUp .6s .3s ease both;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    margin-top: 2.8rem;
    animation: fadeUp .6s .45s ease both;
}

.btn-primary {
    background: var(--accent);
    color: #FFFFFF;
    padding: .8rem 2rem;
    border-radius: 2px;
    font-weight: 700;
    font-size: .9rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background .2s, transform .2s;
}

.btn-primary:hover {
    background: var(--accent2);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: .8rem 2rem;
    border-radius: 2px;
    font-weight: 500;
    font-size: .9rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    text-decoration: none;
    transition: border-color .2s, transform .2s;
}

.btn-outline:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* scroll hint */
.scroll-hint {
    position: absolute;
    bottom: 2.5rem;
    right: 4rem;
    font-family: 'Courier New', monospace;
    font-size: .72rem;
    color: var(--muted);
    letter-spacing: .12em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: .6rem;
    animation: fadeUp .6s .6s ease both;
}

.scroll-hint::before {
    content: '';
    width: 1px;
    height: 40px;
    background: var(--muted);
    animation: scrollLine 1.5s ease-in-out infinite;
}

/* ── SECTION COMMONS ── */
section {
    padding: 7rem 4rem;
}

.section-label {
    font-family: 'Courier New', monospace;
    font-size: .75rem;
    color: var(--accent);
    letter-spacing: .2em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-family: Impact, Arial Black, sans-serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: .04em;
    line-height: 1;
    color: var(--cream);
    margin-bottom: 3rem;
}

/* ── ABOUT ── */
#about {
    background: var(--bg2);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text p {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.2rem;
}

.about-text p strong {
    color: var(--cream);
    font-weight: 600;
}

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

.stat-card {
    background: var(--bg3);
    border: 1px solid var(--border);
    padding: 1.8rem 1.5rem;
    border-radius: 4px;
    transition: border-color .2s, transform .2s;
}

.stat-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.stat-num {
    font-family: Impact, Arial Black, sans-serif;
    font-size: 3rem;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: .82rem;
    color: var(--muted);
    margin-top: .4rem;
    letter-spacing: .05em;
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.2rem;
}

.skill-group {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 1.8rem;
    border-radius: 4px;
    transition: border-color .2s, transform .2s;
}

.skill-group:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.skill-group-title {
    font-family: 'Courier New', monospace;
    font-size: .78rem;
    color: var(--accent);
    letter-spacing: .14em;
    text-transform: uppercase;
    margin-bottom: 1.2rem;
    padding-bottom: .8rem;
    border-bottom: 1px solid var(--border);
}

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

.skill-tag {
    background: var(--tag-bg);
    color: var(--accent);
    border: 1px solid var(--border);
    padding: .3rem .7rem;
    border-radius: 2px;
    font-size: .8rem;
    font-weight: 500;
}

/* ── PROJECTS ── */
#projects {
    background: var(--bg2);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.4rem;
}

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color .2s, transform .25s;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.project-card-top {
    padding: 1.8rem 1.8rem 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.project-icon {
    width: 42px;
    height: 42px;
    border-radius: 3px;
    background: var(--tag-bg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-text {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    font-size: .75rem;
    color: var(--accent);
    letter-spacing: .04em;
}

.project-links {
    display: flex;
    gap: .5rem;
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-size: .8rem;
    font-family: 'Courier New', monospace;
    letter-spacing: .06em;
    padding: .3rem .6rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    transition: color .2s, border-color .2s;
}

.project-link:hover {
    color: var(--accent2);
    border-color: var(--accent);
}

.project-body {
    padding: 0 1.8rem 1.8rem;
    flex: 1;
}

.project-title {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: .5rem;
    color: var(--cream);
}

.project-desc {
    font-size: .88rem;
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 1.2rem;
}

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

.stack-tag {
    font-family: 'Courier New', monospace;
    font-size: .72rem;
    color: var(--accent);
    background: var(--tag-bg);
    border: 1px solid var(--border);
    padding: .2rem .55rem;
    border-radius: 2px;
}

/* featured project */
.project-card.featured {
    grid-column: 1 / -1;
    flex-direction: row;
}

.project-card.featured .project-card-top {
    padding-bottom: 1.8rem;
}

.project-card.featured .project-icon {
    width: 54px;
    height: 54px;
    font-size: 1.6rem;
}

.project-featured-content {
    flex: 1;
    padding: 1.8rem;
}

.project-featured-meta {
    width: 220px;
    background: var(--bg3);
    border-left: 1px solid var(--border);
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    gap: .8rem;
}

.meta-item {
    font-family: 'Courier New', monospace;
    font-size: .72rem;
}

.meta-item span {
    display: block;
    color: var(--muted);
    letter-spacing: .1em;
    text-transform: uppercase;
    margin-bottom: .2rem;
}

.meta-item strong {
    color: var(--cream);
}

.featured-badge {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    background: var(--tag-bg);
    color: var(--accent);
    border: 1px solid var(--border);
    font-family: 'Courier New', monospace;
    font-size: .7rem;
    letter-spacing: .12em;
    padding: .25rem .7rem;
    border-radius: 2px;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

/* ── EXPERIENCE ── */
#experience {
    background: var(--bg);
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding: 0 0 3rem 2.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: .35rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent);
    transform: translateX(calc(-50% + .5px));
}

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

.t-period {
    font-family: 'Courier New', monospace;
    font-size: .75rem;
    color: var(--accent);
    letter-spacing: .1em;
    margin-bottom: .4rem;
}

.t-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--cream);
    margin-bottom: .2rem;
}

.t-org {
    font-size: .9rem;
    color: var(--muted);
    margin-bottom: .8rem;
}

.t-desc {
    font-size: .9rem;
    color: var(--muted);
    line-height: 1.7;
}

/* ── HOBBIES ── */
#hobbies {
    background: var(--bg3);
}

.hobbies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.hobby-card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 2.5rem 2rem;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: border-color .3s, transform .3s, box-shadow .3s;
    position: relative;
    overflow: hidden;
}

.hobby-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s ease;
}

#hobbies .hobby-card:hover {
    border-color: var(--accent) !important;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, .3);
}

.hobby-card:hover::before {
    transform: scaleX(1);
}

.hobby-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.hobby-name {
    font-family: Impact, Arial Black, sans-serif;
    font-size: 1.8rem;
    letter-spacing: .02em;
    color: var(--cream);
    margin-bottom: .5rem;
}

.hobby-desc {
    font-size: .95rem;
    color: var(--muted);
    line-height: 1.6;
}

.hobby-desc strong {
    color: var(--cream);
}

.hobby-link {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    margin-top: 1rem;
    font-family: 'Courier New', monospace;
    font-size: .8rem;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: .05em;
    transition: color .2s, gap .2s;
}

.hobby-link:hover {
    color: var(--accent2);
    gap: .8rem;
}

/* ── CONTACT ── */
#contact {
    background: var(--bg2);
    text-align: center;
    padding: 8rem 4rem;
}

.contact-eyebrow {
    font-family: 'Courier New', monospace;
    font-size: .78rem;
    color: var(--accent);
    letter-spacing: .2em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.contact-title {
    font-family: Impact, Arial Black, sans-serif;
    font-size: clamp(3rem, 7vw, 6rem);
    line-height: .95;
    margin-bottom: 1.5rem;
    color: var(--cream);
}

.contact-title span {
    color: var(--accent);
}

.contact-sub {
    color: var(--muted);
    font-size: 1rem;
    margin-bottom: 3rem;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--cream);
    text-decoration: none;
    border: 1px solid var(--border);
    padding: .8rem 1.6rem;
    border-radius: 2px;
    font-size: .9rem;
    font-weight: 500;
    letter-spacing: .04em;
    transition: border-color .2s, color .2s, transform .2s;
}

.contact-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.contact-link svg {
    width: 16px;
    height: 16px;
}

/* ── FOOTER ── */
footer {
    padding: 2rem 4rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: .8rem;
    color: var(--muted);
    font-family: 'Courier New', monospace;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: .3;
    }
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }

    50% {
        transform: scaleY(1);
        transform-origin: top;
    }

    51% {
        transform: scaleY(1);
        transform-origin: bottom;
    }

    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s ease, transform .7s ease;
}

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

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
    nav {
        padding: 1.2rem 1.5rem;
    }

    #hero {
        padding: 0 1.5rem 5rem;
    }

    section {
        padding: 5rem 1.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .project-card.featured {
        flex-direction: column;
    }

    .project-featured-meta {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border);
        flex-direction: row;
        flex-wrap: wrap;
    }

    footer {
        flex-direction: column;
        gap: .5rem;
        text-align: center;
    }

    .nav-links {
        display: none;
    }
}