* {
    box-sizing: border-box;
}

:root {
    color-scheme: dark;
    --bg: #050505;
    --fg: #f5f5f5;
    --muted: rgba(255, 255, 255, 0.72);
    --soft: rgba(255, 255, 255, 0.1);
    --panel: rgba(255, 255, 255, 0.03);
    --panel-strong: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.14);
    --border-strong: rgba(255, 255, 255, 0.3);
    --accent: rgb(3, 235, 3);
    --footer-muted: #9e9e9e;
    --footer-link: #fff;
    --canvas-stroke: rgba(255, 255, 255, 0.9);
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}

:root[data-theme="light"] {
    color-scheme: light;
    --bg: #fff;
    --fg: #14110f;
    --muted: rgba(20, 17, 15, 0.74);
    --soft: rgba(20, 17, 15, 0.08);
    --panel: rgba(194, 194, 194, 0.247);
    --panel-strong: rgba(255, 255, 255, 0.74);
    --border: rgba(0, 0, 0, 0.342);
    --border-strong: rgba(20, 17, 15, 0.28);
    --accent: #0d9a37;
    --footer-muted: #5e5a56;
    --footer-link: #14110f;
    --canvas-stroke: rgb(0, 0, 0);
    --shadow: 0 18px 40px rgba(20, 17, 15, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg);
    color: var(--fg);
    font-family: Georgia, "Times New Roman", serif;
    overflow-x: hidden;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* light-dark mode */
#dark-mode-toggle {
  display: none;
}

#dark-mode-toggle + label {
    z-index: 1;
    width: 100px;
    height: 100px;
    position: absolute ;
    right: 40px;
    top: 30px;
}

#dark-mode-toggle + label i {
  color: white;
  /* text-shadow: 0 0 2px rgba(255, 255, 255, 0.5), 0 0 12px */
}

#dark-mode-toggle:not(:checked) + label i {
  color: black;
  /* text-shadow: 0 0 6px rgba(0, 0, 0, 0.7) */
}

#dark-mode-toggle + label i {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#dark-mode-toggle + label i:hover {
  opacity: 0.85;
  transform: rotate(-30deg) scale(1.2);
}

canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

main,
.site-footer {
    position: relative;
    z-index: 1;
}

/* hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 20px 2px;
    margin: 0px 10px 0px;
    text-align: center;
}

.hero-box {
    width: min(760px, 100%);
    margin: 0 auto;
}

.hero-pfp img {
    border: 0.5px solid var(--fg);
    max-width: 20%;
    border-radius: 60%;
    transition: transform 0.6s ease;
}

.hero-pfp img:hover {
    transform: rotate(360deg);
}

.hero-title {
    color: var(--fg);
    font-size: clamp(1.4rem, 3rem, 4rem);
    text-align: center;
    line-height: 1.08;
    font-weight: 700;
}

.hero-sub {
    margin: 0 5 28px;
    opacity: 0.8;
    max-width: 680px;
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--muted);
}

.hero-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    margin: 0 0 30px;
    padding-top: 20px;
}

/* FIX: flex-wrap so icons don't overflow the card on mobile; bigger gap for breathing room */
.contact-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 28px;
    margin: 0 0 30px;
    padding-top: 20px;
}

.hero-links a,
.contact-links a {
    color: var(--fg);
    text-decoration: none;
    opacity: 1;
    transition:
        transform 0.18s ease,
        opacity 0.18s ease;
}

.hero-links a:hover,
.contact-links a:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.cta-btn {
    display: inline-block;
    margin: 0 auto;
    padding: 1px 10px;
    text-decoration: none;
    font-weight: 700;
    transition:
        transform 0.18s ease,
        opacity 0.18s ease,
        box-shadow 0.18s ease;
}

.cta-btn i {
    color: var(--fg);
    display: inline-block;
    animation: bounce 1.5s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(8px);
    }
}

.cta-btn:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

/* shared section layout */
.section {
    padding: 32px 20px 56px;
}

.section-inner {
    width: min(980px, calc(100% - 8px));
    margin: 0 auto;
    padding: 38px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--panel);
    backdrop-filter: blur(3px);
    transition:
        background-color 0.25s ease,
        border-color 0.25s ease,
        box-shadow 0.25s ease;
}

.section-label,
.section-title {
    margin: 0 0 22px;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    line-height: 1.15;
    font-weight: 700;
    text-align: center;
    color: var(--fg);
}

.about-grid {
    display: flex;
    padding: 0 0 20px;
    grid-template-columns: 1fr 1fr;
}

.about-text {
    flex: 1;
    max-width: 500;
    margin: 0 auto;
    font-size: 1.02rem;
    line-height: 1.9;
    color: var(--muted);
    text-overflow: clip;
}

.about-grid a {
    color: var(--accent);
    text-decoration: underline;
}

.about-grid a strong {
    color: var(--accent);
}

.about-text strong {
    color: var(--fg);
    font-weight: 700;
}

/* projects */
.projects-group+.projects-group {
    margin-top: 32px;
}

.group-label {
    margin: 0 0 16px;
    color: var(--muted);
    opacity: 0.5;
    font-size: 1rem;
    font-weight: 700;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.project-card {
    display: block;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    background: var(--panel);
    transition:
        transform 0.18s ease,
        border-color 0.18s ease,
        background 0.18s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    background: var(--panel-strong);
}

.card-title {
    padding: 10px 0 0;
    margin: 0 0 10px;
    font-size: 1.2rem;
    color: var(--fg);
}

.card-desc {
    margin: 0 0 14px;
    color: var(--muted);
    line-height: 1.7;
}

.card-lang {
    display: inline-block;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.88rem;
    color: var(--fg);
}

/* art */
.art-carousel {
    position: relative;
}

.art-row {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 5px 0 10px;
}

.art-row::-webkit-scrollbar {
    display: none;
}

.art-nav {
    position: absolute;
    top: 50%;
    z-index: 2;
    border: 0;
    padding: 0;
    background: transparent;
    color: var(--fg);
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
    transition: opacity 0.25s ease, transform 0.25s ease;
    transform: translateY(-50%);
}

.art-nav:hover {
    transform: translateY(calc(-50% - 2px));
}

.art-nav-left {
    left: -28px;
}

.art-nav-right {
    right: -28px;
}

.art-nav.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.art-card {
    min-width: 260px;
    max-width: 260px;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px;
    background: var(--panel);
    scroll-snap-align: start;
    transition: 0.25s ease;
}

.art-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}

.art-card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
    filter: saturate(0);
}

.art-card img:hover {
    filter: saturate(1);
}

.art-card p {
    font-family: serif;
    text-align: center;
    margin: 0;
    font-size: 0.9rem;
    color: var(--muted);
}

/*contact */
.contact-intro {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
    text-align: center;
    padding: 0 0 3rem;
}

/* footer */
.vaibring-nav {
    width: fit-content;
    margin: 0 auto;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
        var(--panel);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
}

.vaibring-nav a {
    min-width: 1.1rem;
    height: 1.4rem;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    color: var(--fg);
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    transition:
        background-color 0.18s ease,
        color 0.18s ease,
        transform 0.18s ease,
        opacity 0.18s ease;
}

.vaibring-nav a[data-vaibring="prev"],
.vaibring-nav a[data-vaibring="next"] {
    padding: 0;
    font-size: 1rem;
    color: var(--muted);
}

.vaibring-nav a[data-vaibring="random"] {
    min-width: 6.4rem;
    font-size: 0.98rem;
}

.vaibring-nav a:hover,
.vaibring-nav a:focus-visible {
    background: var(--panel);
    color: var(--fg);
    transform: translateY(-1px);
    outline: none;
}

.vaibring-nav a:active {
    transform: translateY(0);
}

.site-footer {
    padding: 8px 0 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    width: 100%;
}

.site-footer p {
    margin: 0;
    color: var(--footer-muted);
    flex: 1 1 0;
}

.footer-copy {
    text-align: left;
}

.footer-upi {
    text-align: right;
}

.footer-upi a {
    cursor: pointer;
}

.footer-link {
    color: var(--footer-link);
    text-decoration: none;
}

.upi-status {
    color: var(--fg);
    font-size: 0.85rem;
}

.upi-status:not(:empty) {
    display: inline-block;
    margin-left: 8px;
}

.upi-status:empty {
    display: none;
}

@media (max-width: 800px) {
    .art-nav {
        font-size: 1.1rem;
    }

    .art-nav-left {
        left: -18px;
    }

    .art-nav-right {
        right: -18px;
    }

    .about-grid,
    .card-grid {
        grid-template-columns: 1fr;
    }

    .section-inner {
        padding: 22px;
    }
}

@media (max-width: 640px) {
    .hero {
        min-height: 82vh;
        padding-top: 36px;
    }

    .hero-sub {
        font-size: 0.97rem;
        line-height: 1.75;
    }

    .hero-links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .section {
        padding: 24px 16px 40px;
    }

    .section-inner {
        padding: 18px;
        border-radius: 14px;
    }

    .vaibring-nav {
        margin-bottom: 18px;
    }

    .vaibring-nav a[data-vaibring="random"] {
        min-width: 5.8rem;
    }

    .site-footer {
        padding: 8px 0 16px;
        flex-direction: column;
        justify-content: center;
        gap: 12px;
    }

    .site-footer p {
        flex: initial;
    }

    .footer-copy,
    .footer-upi {
        text-align: center;
    }

    .vaibring-nav {
        order: -1;
    }
}