@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

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

:root {
    --bg: #080c10;
    --surface: #0e1319;
    --card: #111820;
    --border: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.14);
    --text: #e8edf3;
    --muted: #6b7a8d;
    --subtle: #3a4556;
    --accent: #5b9cf6;
    --accent2: #a78bfa;
    --gold: #f4c06f;
    --green: #4ade80;
    --r: 12px;
    --tr: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --c-color: #A8B9CC;
    --c-glow: rgba(168, 185, 204, 0.12);
    --python-color: #3776AB;
    --python-glow: rgba(55, 118, 171, 0.15);
    --javascript-color: #F7DF1E;
    --javascript-glow: rgba(247, 223, 30, 0.1);
    --html-color: #E34F26;
    --html-glow: rgba(227, 79, 38, 0.15);
    --css-color: #1572B6;
    --css-glow: rgba(21, 114, 182, 0.15);
    --arduino-color: #00979D;
    --arduino-glow: rgba(0, 151, 157, 0.15);
    --esp-color: #E7352C;
    --esp-glow: rgba(231, 53, 44, 0.12);
    --raspberry-color: #A22846;
    --raspberry-glow: rgba(162, 40, 70, 0.15);
    --linux-color: #FCC624;
    --linux-glow: rgba(252, 198, 36, 0.12);
    --windows-color: #00A4EF;
    --windows-glow: rgba(0, 164, 239, 0.15);
    --fusion-color: #FF6B35;
    --fusion-glow: rgba(255, 107, 53, 0.15);
    --paintdotnet-color: #6A9FB5;
    --paintdotnet-glow: rgba(106, 159, 181, 0.15);
    --cloudflare-color: #F38020;
    --cloudflare-glow: rgba(243, 128, 32, 0.15);
    --nginx-color: #009900;
    --nginx-glow: rgba(0, 153, 0, 0.15);
}

::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--subtle);
    border-radius: 99px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* mesh background */
.mesh {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.mesh-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(130px);
    opacity: 0.1;
    animation: drift 22s ease-in-out infinite alternate;
}

.mesh-orb:nth-child(1) {
    width: 700px;
    height: 700px;
    top: -200px;
    left: 50%;
    transform: translateX(-80%);
    background: #3b6cf7;
    animation-delay: 0s;
}

.mesh-orb:nth-child(2) {
    width: 500px;
    height: 500px;
    bottom: -150px;
    left: 50%;
    transform: translateX(10%);
    background: #7c3aed;
    animation-delay: -8s;
}

.mesh-orb:nth-child(3) {
    width: 400px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #1a56db;
    animation-delay: -16s;
}

@keyframes drift {
    from {
        transform: translate(0, 0) scale(1);
    }

    to {
        transform: translate(50px, 35px) scale(1.08);
    }
}

/* cursor glow */
.cursor-glow {
    position: fixed;
    pointer-events: none;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(91, 156, 246, 0.055) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    z-index: 0;
    transition: opacity 0.4s;
}

/* layout */
.container {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem 7rem;
    position: relative;
    z-index: 1;
}

/* navbar */
nav {
    position: sticky;
    top: 0;
    z-index: 100;
}

nav::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(8, 12, 16, 0.82);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    z-index: -1;
}

.nav-inner {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-logo span {
    color: var(--accent);
}

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

.nav-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--tr);
}

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

.lang-switch {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 0.28rem 0.7rem;
    border-radius: 99px;
    cursor: pointer;
    font-size: 0.78rem;
    font-family: inherit;
    transition: all var(--tr);
}

.lang-btn:hover,
.lang-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(91, 156, 246, 0.08);
}

/* hero */
.hero {
    padding: 4rem 0 3.5rem;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(91, 156, 246, 0.08);
    border: 1px solid rgba(91, 156, 246, 0.2);
    border-radius: 99px;
    padding: 0.3rem 0.9rem;
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 1.75rem;
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.hero-tag .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.4;
        transform: scale(0.65);
    }
}

.hero h1 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.9rem, 3.5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 1.5rem;
    color: var(--text);
}

.hero h1 em {
    font-style: normal;
    background: linear-gradient(130deg, var(--accent) 0%, var(--accent2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--muted);
    max-width: 500px;
    font-weight: 300;
    line-height: 1.75;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 0.875rem;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: #fff;
    padding: 0.7rem 1.6rem;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--tr);
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background: #4a8de0;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(91, 156, 246, 0.35);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    color: var(--text);
    padding: 0.7rem 1.6rem;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--tr);
    border: 1px solid var(--border-hover);
}

.btn-ghost:hover {
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.03);
}

/* section titles */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.6rem;
}

.section-label::before {
    content: "";
    width: 18px;
    height: 1px;
    background: var(--accent);
}

section {
    margin-bottom: 5rem;
}

h2 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.6rem, 3.5vw, 2.1rem);
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
    margin-bottom: 2rem;
    line-height: 1.15;
}

h3.sub {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--subtle);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 2.25rem 0 1rem;
}

/* skill grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
    gap: 12px;
    justify-content: center;
}

.element {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    aspect-ratio: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: default;
    position: relative;
    overflow: hidden;
    transition: transform var(--tr), box-shadow var(--tr),
        border-color 0.1s ease, background 0.1s ease;
}

.element::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% -20%, var(--hover-glow, transparent), transparent 65%);
    opacity: 0;
    transition: opacity 0.1s ease;
}

.element:hover {
    transform: translateY(-5px) scale(1.025);
    border-color: var(--hover-border, var(--border-hover));
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.element:hover::after {
    opacity: 1;
}

.element img {
    width: 46px;
    height: 46px;
    object-fit: contain;
    margin-bottom: 10px;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.4));
    transition: transform 0.25s ease;
    position: relative;
    z-index: 1;
}

.element:hover img {
    transform: scale(1.1) translateY(-2px);
}

.element p {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--muted);
    position: relative;
    z-index: 1;
}

.element[data-tech="c"] {
    --hover-border: var(--c-color);
    --hover-glow: var(--c-glow);
}

.element[data-tech="python"] {
    --hover-border: var(--python-color);
    --hover-glow: var(--python-glow);
}

.element[data-tech="javascript"] {
    --hover-border: var(--javascript-color);
    --hover-glow: var(--javascript-glow);
}

.element[data-tech="html"] {
    --hover-border: var(--html-color);
    --hover-glow: var(--html-glow);
}

.element[data-tech="css"] {
    --hover-border: var(--css-color);
    --hover-glow: var(--css-glow);
}

.element[data-tech="arduino"] {
    --hover-border: var(--arduino-color);
    --hover-glow: var(--arduino-glow);
}

.element[data-tech="esp"] {
    --hover-border: var(--esp-color);
    --hover-glow: var(--esp-glow);
}

.element[data-tech="raspberry"] {
    --hover-border: var(--raspberry-color);
    --hover-glow: var(--raspberry-glow);
}

.element[data-tech="linux"] {
    --hover-border: var(--linux-color);
    --hover-glow: var(--linux-glow);
}

.element[data-tech="windows"] {
    --hover-border: var(--windows-color);
    --hover-glow: var(--windows-glow);
}

.element[data-tech="fusion"] {
    --hover-border: var(--fusion-color);
    --hover-glow: var(--fusion-glow);
}

.element[data-tech="paintdotnet"] {
    --hover-border: var(--paintdotnet-color);
    --hover-glow: var(--paintdotnet-glow);
}

.element[data-tech="cloudflare"] {
    --hover-border: var(--cloudflare-color);
    --hover-glow: var(--cloudflare-glow);
}

.element[data-tech="nginx"] {
    --hover-border: var(--nginx-color);
    --hover-glow: var(--nginx-glow);
}

/* timeline */
.timeline {
    display: flex;
    flex-direction: column;
}

.timeline-item {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 2rem;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--border);
    transition: padding-left var(--tr);
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-item:hover {
    padding-left: 6px;
}

.timeline-date {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--subtle);
    padding-top: 0.2rem;
    letter-spacing: 0.2px;
}

.timeline-content h3 {
    font-family: 'Syne', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    text-transform: none;
    letter-spacing: -0.2px;
    margin-bottom: 0.4rem;
}

.timeline-content p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.65;
    font-weight: 300;
}

/* links */
.links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 99px;
    padding: 0.55rem 1.3rem;
    color: var(--muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--tr);
}

.social-link:hover {
    border-color: var(--border-hover);
    color: var(--text);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.03);
}

/* footer */
footer {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    margin-top: 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

footer p {
    color: var(--subtle);
    font-size: 0.8rem;
}

/* ---- REVEAL ANIMATIONS ---- */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-d1 {
    transition-delay: 0.1s;
}

.reveal-d2 {
    transition-delay: 0.2s;
}

.reveal-d3 {
    transition-delay: 0.3s;
}

.grid .element {
    opacity: 0;
    transform: translateY(18px) scale(0.97);
    transition: opacity 0.5s ease, transform 0.5s ease,
        box-shadow var(--tr), border-color var(--tr);
}

.grid.visible .element {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.grid.visible .element:nth-child(1) {
    transition-delay: 0.04s;
}

.grid.visible .element:nth-child(2) {
    transition-delay: 0.08s;
}

.grid.visible .element:nth-child(3) {
    transition-delay: 0.12s;
}

.grid.visible .element:nth-child(4) {
    transition-delay: 0.16s;
}

.grid.visible .element:nth-child(5) {
    transition-delay: 0.20s;
}

.grid.visible .element:nth-child(6) {
    transition-delay: 0.24s;
}

.grid.visible .element:nth-child(7) {
    transition-delay: 0.28s;
}

.grid.visible .element:nth-child(8) {
    transition-delay: 0.32s;
}

.grid.visible .element:nth-child(9) {
    transition-delay: 0.36s;
}

.grid.visible .element:nth-child(10) {
    transition-delay: 0.40s;
}

.grid.visible .element:nth-child(11) {
    transition-delay: 0.44s;
}

.grid.visible .element:nth-child(12) {
    transition-delay: 0.48s;
}

/* hero entrance */
.hero-tag,
.hero h1,
.hero-desc,
.hero-cta {
    opacity: 0;
    transform: translateY(22px);
    animation: heroIn 0.85s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.hero-tag {
    animation-delay: 0.1s;
}

.hero h1 {
    animation-delay: 0.25s;
}

.hero-desc {
    animation-delay: 0.42s;
}

.hero-cta {
    animation-delay: 0.58s;
}

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

/* responsive */
@media (max-width: 640px) {
    .container {
        padding: 0 1.25rem 5rem;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 3rem 0 2.5rem;
    }

    .grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }

    footer {
        flex-direction: column;
        text-align: center;
    }
}