/* ========================
    DESIGN SYSTEM (CSS Vars)
    ======================== */
    :root {
        /* DARK THEME (when data-theme is not light) */
        --bg: #0a0e27;
        --bg-2: #0f1419;
        --text: #e5e7eb;
        --heading: #ffffff;
        --muted: #a3a3a3;
        --primary: #0ea5e9;
        --primary-2: #00d4ff;
        --secondary: #8b5cf6;
        --accent: #10b981;
        --warning: #f59e0b;
        --glass: rgba(0, 0, 0, .6);
        --glass-strong: rgba(0, 0, 0, .8);
        --card: rgba(15, 20, 25, .65);
        --cardText: #e8ebf1;
        --border: rgba(255, 255, 255, .12);
        --shadow: 0 10px 30px rgba(0, 0, 0, .35);
        --radius: 18px;
        --radius-lg: 22px;
        --space: 8px;
    }

    /* LIGHT THEME OVERRIDES */
    :root[data-theme="light"] {
        --bg: #f8fafc;
        --bg-2: #ffffff;
        --text: #0b1220;
        --heading: #0b1220;
        --muted: #475569;
        /* slate-600 */
        --primary: #0284c7;
        --primary-2: #06b6d4;
        --secondary: #6d28d9;
        --accent: #059669;
        --warning: #b45309;
        --glass: rgba(255, 255, 255, .70);
        --glass-strong: rgba(255, 255, 255, .85);
        --card: rgba(255, 255, 255, .78);
        --cardText: #0b1220;
        --border: rgba(2, 6, 23, .12);
        --shadow: 0 10px 30px rgba(2, 6, 23, .12);
    }

    /* Theme Fade Transition */
    /* html[data-theme="light"],
    html[data-theme="dark"] {
        transition: background-color .4s ease, color .4s ease;
    } */
    :root[data-theme="light"],
    :root[data-theme="dark"] {
        transition: background-color .4s ease, color .4s ease;
    }

    body,
    .glass,
    .card,
    footer {
        transition: background .4s ease, color .4s ease, border-color .4s ease;
    }

    /* Prevent flicker during toggle */
    * {
        transition: background-color .3s ease, color .3s ease, border-color .3s ease;
    }


    * {
        box-sizing: border-box
    }

    html {
        /* scroll-behavior: smooth; Handled by Lenis! */
    }

    body {
        margin: 0;
        font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
        color: var(--text);
        background: var(--bg);
        line-height: 1.65;
        overflow-x: hidden;
    }

    /* Fixed starfield canvas (behind content) */
    #star-canvas {
        position: fixed;
        inset: 0;
        width: 100vw;
        height: 100vh;
        z-index: -1;
        display: block;
        background: radial-gradient(circle at 50% 120%, #0b0c1a 0%, #000 100%);
    }

    /* Scroll progress */
    .progress-bar {
        position: fixed;
        top: 0;
        left: 0;
        height: 4px;
        width: 100%;
        transform: scaleX(0);
        transform-origin: left;
        z-index: 9999;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        box-shadow: 0 0 12px rgba(14, 165, 233, .55);
    }

    /* Nav */
    header.nav {
        position: sticky;
        top: 0;
        z-index: 9998;
        transform: translateY(-110%);
        transition: transform .5s ease;
    }

    header.nav.visible {
        transform: translateY(0)
    }

    .nav-wrap {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: calc(var(--space)*2);
        max-width: 1200px;
        margin: 12px auto;
        padding: 12px 20px;
        background: var(--card);
        backdrop-filter: blur(12px);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
    }

    .brand {
        font-weight: 700;
        color: var(--heading);
        letter-spacing: .5px;
    }

    nav ul {
        list-style: none;
        display: flex;
        margin: 0;
        padding: 0;
        gap: 14px;
    }

    nav a {
        display: inline-block;
        padding: 10px 14px;
        border-radius: 12px;
        color: var(--text);
        text-decoration: none;
        transition: transform .25s ease, background .25s ease, color .25s ease;
    }

    :root[data-theme="light"] nav a:hover {
        transform: translateY(-2px) scale(1.03);
        color: var(--heading);
        background: rgba(0, 0, 0, 0.110);
    }

    :root[data-theme="dark"] nav a:hover {
        transform: translateY(-2px) scale(1.03);
        color: var(--heading);
        background: rgba(255, 255, 255, 0.110);
    }

    nav a.active {
        background: linear-gradient(90deg, color-mix(in srgb, var(--primary) 40%, transparent), color-mix(in srgb, var(--secondary) 40%, transparent));
        color: var(--heading);
        box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06);
    }

    .hamburger {
        display: none;
        cursor: pointer;
        width: 42px;
        height: 42px;
        border-radius: 12px;
        border: 1px solid var(--border);
        background: var(--card);
        place-content: center;
    }

    .hamburger span {
        width: 22px;
        height: 2px;
        background: var(--text);
        display: block;
        position: relative;
    }

    .hamburger span::before,
    .hamburger span::after {
        content: "";
        position: absolute;
        inset-inline: 0;
        height: 2px;
        background: var(--text);
    }

    .hamburger span::before {
        top: -6px
    }

    .hamburger span::after {
        top: 6px
    }

    .menu {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    @media (max-width:900px) {
        .menu {
            display: none
        }

        .menu.open {
            display: grid;
            grid-template-columns: 1fr;
            gap: 6px;
            position: absolute;
            top: calc(100% + 8px);
            right: 12px;
            background: var(--card);
            padding: 10px;
            border: 1px solid var(--border);
            border-radius: 12px;
        }

        .hamburger {
            display: grid
        }
    }

    /* Sections */
    main {
        position: relative;
        z-index: 1
    }

    section {
        padding: clamp(80px, 12vh, 120px) 20px;
        display: grid;
        place-items: center
    }

    .container {
        width: min(1200px, 92vw);
        margin-inline: auto
    }

    .glass {
        background: var(--glass);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow)
    }

    .content-card {
        padding: clamp(20px, 4vw, 36px);
        color: var(--cardText)
    }

    h1,
    h2,
    h3 {
        color: var(--heading);
        line-height: 1.2;
        margin: 0 0 12px 0
    }

    h1 {
        font-size: clamp(36px, 6vw, 64px);
        font-weight: 800
    }

    h2 {
        font-size: clamp(28px, 4.2vw, 42px);
        font-weight: 700
    }

    h3 {
        font-size: clamp(20px, 2.6vw, 28px);
        font-weight: 600
    }

    p {
        color: var(--text);
        margin: 0 0 12px 0
    }

    .muted {
        color: var(--muted)
    }

    .lead {
        font-size: clamp(18px, 2.2vw, 22px);
        opacity: .95
    }

    .mono {
        font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace
    }

    /* HERO */
    .hero {
        min-height: 100svh;
        display: grid;
        place-items: center;
        text-align: center;
        position: relative;
    }

    .hero-inner {
        display: grid;
        gap: 22px
    }

    .name-gradient {
        background: linear-gradient(90deg, var(--primary-2), var(--secondary));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        /* text-shadow: 0 2px 10px rgba(0, 0, 0, .8); */
    }

    :root[data-theme="light"] .name-gradient {
        text-shadow: linear-gradient(90deg, var(--primary-2), var(--secondary));
        /* text-shadow: 0 2px 10px rgba(0, 0, 0, .8); */
        /* text-shadow: 0 1px 0 rgba(255, 255, 255, .8), 0 0 18px rgba(99, 102, 241, .35); */
    }

    .breathing {
        animation: breathe 6s ease-in-out infinite
    }

    @keyframes breathe {

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

        50% {
            transform: translateY(-6px)
        }
    }

    .cta-row {
        display: flex;
        gap: 12px;
        justify-content: center;
        flex-wrap: wrap
    }

    .btn {
        --_bg: var(--primary);
        display: inline-block;
        padding: 12px 18px;
        border-radius: 14px;
        color: white;
        background: linear-gradient(90deg, var(--_bg), var(--secondary));
        text-decoration: none;
        font-weight: 600;
        letter-spacing: .3px;
        box-shadow: 0 8px 22px rgba(14, 165, 233, .25);
        transform: translateZ(0);
        transition: transform .25s cubic-bezier(.2, .6, .2, 1), filter .25s ease
    }

    .btn:hover {
        transform: translateY(-2px) scale(1.05);
        filter: brightness(1.1)
    }

    .btn.ghost {
        background: transparent;
        box-shadow: inset 0 0 0 1px var(--border);
        color: var(--heading)
    }

    .scroll-indicator {
        position: absolute;
        /* bottom: 22px; */
        bottom: 120px;
        left: 50%;
        translate: -50% 0;
        color: var(--text);
        opacity: .8;
        font-size: 14px
    }

    .scroll-indicator .arrow {
        display: block;
        margin: 6px auto 0;
        width: 12px;
        height: 12px;
        border-right: 2px solid var(--text);
        border-bottom: 2px solid var(--text);
        transform: rotate(45deg);
        animation: floatDown 1.6s infinite ease-in-out
    }

    @keyframes floatDown {
        0% {
            opacity: .2;
            transform: translateY(0) rotate(45deg)
        }

        50% {
            opacity: 1;
            transform: translateY(8px) rotate(45deg)
        }

        100% {
            opacity: .2;
            transform: translateY(0) rotate(45deg)
        }
    }

    /* Reveal - GSAP will handle the rest */
    .reveal {
        opacity: 0;
        visibility: hidden;
    }

    /* ABOUT */
    .about {
        display: grid;
        gap: 24px;
        grid-template-columns: 1.1fr 2fr;
        align-items: center
    }

    .about img {
        width: 100%;
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        object-fit: cover
    }

    .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 12px
    }

    .tag {
        font-size: 12px;
        padding: 6px 10px;
        border-radius: 999px;
        color: #fff;
        /* background: linear-gradient(90deg, rgba(14, 165, 233, .25), rgba(139, 92, 246, .25)); */
        background: linear-gradient(90deg, color-mix(in srgb, var(--primary) 40%, transparent), color-mix(in srgb, var(--secondary) 40%, transparent));
        border: 1px solid var(--border)
    }

    /* SKILLS */
    .skills-grid {
        display: grid;
        gap: 16px;
        grid-template-columns: repeat(4, 1fr)
    }

    .skill-card {
        padding: 16px;
        border-radius: var(--radius);
        border: 1px solid var(--border);
        background: var(--card);
        box-shadow: var(--shadow);
        color: var(--cardText);
        transition: transform .25s ease
    }

    .skill-card:hover {
        transform: translateY(-4px)
    }

    .skill-bar {
        height: 8px;
        background: rgba(255, 255, 255, .12);
        border-radius: 999px;
        overflow: hidden;
        margin-top: 8px
    }

    :root[data-theme="light"] .skill-bar {
        background: rgba(2, 6, 23, .08)
    }

    .skill-bar>span {
        display: block;
        height: 100%;
        width: 0;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        border-radius: 999px;
        transition: width 1.2s cubic-bezier(.2, .6, .2, 1)
    }

    /* PROJECTS */
    .filters {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
        justify-content: center;
        margin-bottom: 18px
    }

    .filter-btn {
        padding: 8px 14px;
        background: rgba(255, 255, 255, .06);
        color: var(--text);
        border: 1px solid var(--border);
        border-radius: 12px;
        cursor: pointer;
        transition: transform .2s ease
    }

    .filter-btn.active,
    .filter-btn:hover {
        transform: translateY(-2px);
        background: linear-gradient(90deg, rgba(14, 165, 233, .15), rgba(139, 92, 246, .15));
        color: var(--heading)
    }

    /* Fix Project Filter Buttons in Light Theme */
    :root[data-theme="light"] .filter-btn {
        background: rgba(254, 254, 255, 0.277);
        /* Light contrasting bg */
        /* color: var(--heading); */
        border: 1px solid rgba(212, 213, 214, 0.125);
    }

    :root[data-theme="light"] .filter-btn.active,
    :root[data-theme="light"] .filter-btn:hover {
        background: linear-gradient(90deg,
                rgba(14, 165, 233, 0.35),
                rgba(139, 92, 246, 0.35));
        color: var(--heading);
        transform: translateY(-2px);
    }

    .projects-grid {
        display: grid;
        gap: 18px;
        grid-template-columns: repeat(3, 1fr)
    }

    .project {
        position: relative;
        overflow: hidden;
        border-radius: var(--radius);
        border: 1px solid var(--border);
        background: var(--card);
        box-shadow: var(--shadow);
        color: var(--cardText)
    }

    .project img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        display: block;
        transition: transform .4s ease
    }

    .project:hover img {
        transform: scale(1.08)
    }

    .project .meta {
        padding: 14px 16px
    }

    .project .meta p {
        color: var(--muted)
    }

    .project .tech {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
        margin-top: 6px
    }

    .project .overlay {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, .45);
        opacity: 0;
        display: grid;
        place-items: center;
        transition: opacity .3s ease
    }

    :root[data-theme="light"] .project .overlay {
        background: rgba(255, 255, 255, .35)
    }

    .project:hover .overlay {
        opacity: 1
    }

    .project .actions {
        display: flex;
        gap: 10px
    }

    /* TIMELINE */
    .timeline {
        position: relative;
        margin-top: 10px;
        padding-left: 26px
    }

    .timeline::before {
        content: "";
        position: absolute;
        left: 10px;
        top: 0;
        bottom: 0;
        width: 2px;
        background: linear-gradient(var(--secondary), var(--primary));
        opacity: .7
    }

    .tl-item {
        position: relative;
        padding: 16px 0 16px 18px
    }

    .tl-item::before {
        content: "";
        position: absolute;
        left: -2px;
        top: 22px;
        width: 12px;
        height: 12px;
        border-radius: 999px;
        background: var(--warning);
        box-shadow: 0 0 0 4px color-mix(in srgb, var(--warning) 30%, transparent)
    }

    /* TESTIMONIALS */
    .testi-grid {
        display: grid;
        gap: 16px;
        grid-template-columns: repeat(3, 1fr)
    }

    .testi {
        padding: 18px;
        border-radius: var(--radius);
        border: 1px solid var(--border);
        background: var(--card);
        box-shadow: var(--shadow);
        color: var(--cardText)
    }

    .testi .who {
        display: grid;
        grid-template-columns: 48px 1fr;
        gap: 12px;
        align-items: center
    }

    .avatar {
        width: 48px;
        height: 48px;
        border-radius: 999px;
        object-fit: cover;
        border: 1px solid var(--border)
    }

    /* CONTACT */
    form {
        display: grid;
        gap: 12px
    }

    .field {
        display: grid;
        gap: 6px
    }

    .input,
    textarea {
        width: 100%;
        padding: 12px 14px;
        border-radius: 12px;
        border: 1px solid var(--border);
        background: rgba(0, 0, 0, .35);
        color: var(--text);
        outline: none;
        transition: box-shadow .2s ease, border-color .2s ease
    }

    :root[data-theme="light"] .input,
    :root[data-theme="light"] textarea {
        background: rgba(2, 6, 23, .05);
        color: var(--text)
    }

    .input:focus,
    textarea:focus {
        box-shadow: 0 0 0 4px rgba(14, 165, 233, .15);
        border-color: rgba(14, 165, 233, .55)
    }

    .error {
        color: #ff6b6b;
        font-size: 12px;
        min-height: 16px
    }

    /* Footer */
    footer {
        text-align: center;
        padding: 30px 20px;
        color: var(--muted)
    }

    /* Neon Socials (floating) */
    .socials {
        display: flex;
        gap: 14px;
        justify-content: center;
        margin-top: 12px
    }

    .socials a {
        width: 46px;
        height: 46px;
        display: grid;
        place-items: center;
        border-radius: 12px;
        border: 1px solid var(--border);
        background: var(--card);
        color: var(--heading);
        text-decoration: none;
        position: relative;
        box-shadow: 0 0 7px #0A66C2;
        transition: transform .25s ease
    }

    .socials a[aria-label="LinkedIn"] {
        box-shadow: 0 0 7px #0A66C2
    }

    .socials a[aria-label="Email"] {
        box-shadow: 0 0 7px var(--primary-2)
    }

    .socials a[aria-label="GitHub"] {
        box-shadow: 0 0 7px #ffffffa8
    }

    .socials a[aria-label="YouTube"] {
        box-shadow: 0 0 7px #FF0000
    }

    .socials a[aria-label="WhatsApp"] {
        box-shadow: 0 0 7px #25D366
    }

    .socials a:hover {
        transform: translateY(-5px) scale(1.05)
    }

    .socials svg {
        width: 22px;
        height: 22px;
        filter: drop-shadow(0 0 6px color-mix(in srgb, var(--primary) 60%, transparent));
        animation: glowPulse 2.8s ease-in-out infinite
    }

    .socials a:nth-child(2) svg {
        animation-delay: .2s
    }

    .socials a:nth-child(3) svg {
        animation-delay: .4s
    }

    .socials a:nth-child(4) svg {
        animation-delay: .6s
    }

    /* Brand-Glow on Hover */
    .socials a:hover {
        transform: translateY(-5px) scale(1.12);
        background: rgba(255, 255, 255, 0.08);
    }

    /* LinkedIn */
    .socials a[aria-label="LinkedIn"]:hover svg {
        filter: drop-shadow(0 0 10px #0A66C2);
        color: #0A66C2;
    }

    /* Gmail / Email (keeping your theme colors) */
    .socials a[aria-label="Email"]:hover svg {
        filter: drop-shadow(0 0 10px var(--primary));
        color: var(--primary-2);
    }

    /* GitHub */
    .socials a[aria-label="GitHub"]:hover svg {
        filter: drop-shadow(0 0 10px #ffffffa8);
        color: #ffffff;
    }

    /* YouTube */
    .socials a[aria-label="YouTube"]:hover svg {
        filter: drop-shadow(0 0 12px #FF0000CC);
        color: #FF0000;
    }

    /* WhatsApp */
    .socials a[aria-label="WhatsApp"]:hover svg {
        filter: drop-shadow(0 0 12px #25D366);
        color: #25D366;
    }


    @keyframes glowPulse {

        0%,
        100% {
            transform: scale(1);
            opacity: .9
        }

        50% {
            transform: scale(1.08);
            opacity: 1
        }
    }

    /* FABs */
    .fab {
        position: fixed;
        right: 16px;
        bottom: 16px;
        display: grid;
        gap: 12px;
        z-index: 2147483647;
        pointer-events: auto;
    }

    /* Button style */
    .fab button {
        cursor: pointer;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        border: 1px solid var(--border);
        background: var(--card);
        backdrop-filter: blur(12px);
        -webkit-tap-highlight-color: transparent;
        display: grid;
        place-items: center;
        box-shadow: 0 0 12px rgba(0, 255, 100, 0.28);
        transition:
            transform .25s ease,
            box-shadow .25s ease,
            background-color .25s ease,
            border-color .25s ease;
    }

    /* SVG Icons */
    .fab button svg {
        width: 26px;
        height: 26px;
        fill: currentColor;
        transition: filter .3s ease, transform .3s ease;
    }

    /* Neon Green Pulse Hover Effect */
    .fab button:hover {
        transform: translateY(-6px) scale(1.13);
        box-shadow:
            0 0 18px rgba(255, 238, 0, 0.85),
            0 0 36px rgba(234, 255, 0, 0.6);
    }

    .fab button:hover svg {
        transform: scale(1.15);
        filter: drop-shadow(0 0 8px #ffff00);
    }

    /* Visible button when scroll > 60vh — JS toggles display */
    #toTop {
        display: none;
    }

    /* Light theme adaptation */
    :root[data-theme="light"] .fab button {
        box-shadow: 0 0 12px rgba(0, 180, 255, 0.35);
    }

    :root[data-theme="light"] .fab button:hover {
        box-shadow:
            0 0 20px rgba(0, 200, 255, 0.85),
            0 0 34px rgba(0, 200, 255, 0.50);
    }


    /* Responsive */
    @media (max-width:1100px) {
        .skills-grid {
            grid-template-columns: repeat(3, 1fr)
        }

        .projects-grid {
            grid-template-columns: repeat(2, 1fr)
        }

        .about {
            grid-template-columns: 1fr
        }
    }

    @media (max-width:700px) {
        .skills-grid {
            grid-template-columns: repeat(2, 1fr)
        }

        .projects-grid {
            grid-template-columns: 1fr
        }
    }

    /* Reduce Motion */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: .001ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: .001ms !important;
            scroll-behavior: auto !important
        }
    }


/* ✅ Minimal Clean Scrollbar — Works in Dark & Light Mode */
body::-webkit-scrollbar {
    width: 10px;
    background: transparent; /* no track background */
}

:root[data-theme="light"] body::-webkit-scrollbar-track {
    background: black !important;
}

:root[data-theme="dark"] body::-webkit-scrollbar-track {
    background: black !important;
}

/* Default: Faint border so thumb remains visible */
body::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 6px;
    border: 1.5px solid var(--muted); /* outline matches theme */
    transition: border-color .3s ease, box-shadow .3s ease;
}

/* ✅ Hover effect with theme accent glow */
body::-webkit-scrollbar-thumb:hover {
    border-color: var(--muted);
    box-shadow: 0 0 10px var(--primary);
}