:root {
    --bg-primary: #05060a;
    --bg-secondary: #0f111a;
    --bg-elevated: rgba(12, 16, 28, 0.8);
    --bg-glass: rgba(16, 20, 34, 0.65);
    --bg-card: rgba(18, 23, 40, 0.9);
    --accent-1: #4fc3f7;
    --accent-2: #9c6bff;
    --accent-3: #ff9f59;
    --accent-4: #5dffb0;
    --text-primary: #f5f8ff;
    --text-secondary: #c3c8d4;
    --text-muted: #8d90a1;
    --border-soft: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(79, 195, 247, 0.4);
    --shadow-strong: 0 25px 80px rgba(0, 0, 0, 0.5);
    --shadow-soft: 0 10px 35px rgba(9, 13, 30, 0.45);
    --radius-lg: 32px;
    --radius-md: 22px;
    --radius-sm: 14px;
    --transition-fast: 160ms ease;
    --transition-medium: 320ms cubic-bezier(0.22, 1, 0.36, 1);
    --max-width: 1200px;
}

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

html, body {
    height: 100%;
}

body {
    font-family: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, rgba(79, 195, 247, 0.12), transparent 40%),
                radial-gradient(circle at 10% 80%, rgba(156, 107, 255, 0.1), transparent 45%),
                linear-gradient(135deg, #040509, #0b0e17 40%, #05060a 80%);
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
}

canvas#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
}

.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 140px 140px;
    mix-blend-mode: overlay;
    opacity: 0.4;
}

.hero {
    position: relative;
    min-height: 100vh;
    padding: 48px clamp(24px, 5vw, 72px) 120px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto 60px;
    padding: 14px 20px;
    background: rgba(5, 6, 10, 0.7);
    border: 1px solid var(--border-soft);
    border-radius: 999px;
    backdrop-filter: blur(18px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.logo {
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 0.18em;
    color: var(--text-primary);
    text-decoration: none;
    text-transform: uppercase;
    position: relative;
    padding-left: 16px;
}

.logo::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-1);
    box-shadow: 0 0 12px rgba(79, 195, 247, 0.6);
}

.nav-links {
    display: flex;
    gap: 18px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 10px 16px;
    border-radius: 999px;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--text-primary);
    background: rgba(79, 195, 247, 0.15);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 999px;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(32px, 6vw, 96px);
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(79, 195, 247, 0.12);
    color: var(--accent-1);
    font-weight: 600;
    font-size: 0.9rem;
}

.hero-tag::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-1);
}

.hero h1 {
    font-size: clamp(2.8rem, 5vw, 4.5rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
    font-weight: 700;
}

.hero h1 span {
    background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: transform var(--transition-medium), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #0a0c12;
    box-shadow: 0 18px 40px rgba(79, 195, 247, 0.35);
}

.btn.primary:hover {
    transform: translateY(-4px);
}

.btn.ghost {
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.02);
}

.btn.ghost:hover {
    background: rgba(255, 255, 255, 0.08);
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
    padding: 18px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
    background: rgba(15, 18, 30, 0.55);
    backdrop-filter: blur(16px);
}

.hero-meta .meta-label {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.hero-portrait {
    position: relative;
    perspective: 1200px;
}

.portrait-frame {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(160deg, rgba(79, 195, 247, 0.2), rgba(156, 107, 255, 0.08));
    padding: 18px;
    border: 1px solid rgba(79, 195, 247, 0.25);
    transform-style: preserve-3d;
    box-shadow: var(--shadow-strong);
}

.portrait-frame img {
    width: 100%;
    border-radius: calc(var(--radius-lg) - 14px);
    display: block;
}

.portrait-glow {
    position: absolute;
    inset: -40% -10% auto;
    height: 40px;
    background: radial-gradient(circle, rgba(156, 107, 255, 0.4), transparent);
    animation: glow 6s ease-in-out infinite;
    mix-blend-mode: screen;
}

@keyframes glow {
    0%, 100% { transform: translate3d(-10%, 0, 0); opacity: 0.7; }
    50% { transform: translate3d(10%, 10%, 0); opacity: 0.3; }
}

.portrait-floating-card {
    position: absolute;
    right: -18%;
    bottom: 12%;
    width: clamp(220px, 30vw, 280px);
    padding: 20px 22px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    color: var(--text-secondary);
    box-shadow: var(--shadow-soft);
    transform: translateZ(40px);
}

.portrait-floating-card .badge {
    display: inline-block;
    margin-bottom: 12px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(93, 255, 176, 0.16);
    color: var(--accent-4);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-signal {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(180deg, rgba(5, 6, 10, 0) 0%, rgba(5, 6, 10, 0.9) 100%);
    z-index: -1;
}

main {
    display: flex;
    flex-direction: column;
    gap: 140px;
    padding: 0 clamp(24px, 5vw, 72px) 140px;
}

.section-heading {
    max-width: 720px;
    margin: 0 auto 48px;
    text-align: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid rgba(79, 195, 247, 0.3);
    color: var(--accent-1);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.section-heading h2 {
    margin-top: 18px;
    margin-bottom: 16px;
    font-size: clamp(2rem, 4vw, 2.8rem);
}

.section-heading p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.about {
    max-width: var(--max-width);
    margin: 0 auto;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}

.about-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(79, 195, 247, 0.14);
    background: rgba(7, 9, 18, 0.8);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    gap: 16px;
    transform-style: preserve-3d;
}

.about-card h3 {
    font-size: 1.4rem;
}

.about-card p {
    color: var(--text-secondary);
}

.about-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.about-card li {
    position: relative;
    padding-left: 18px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.about-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-2);
}

.about-stats {
    margin-top: 48px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.about-stats div {
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(10, 13, 24, 0.65);
    text-align: center;
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 700;
    display: block;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.skills {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

.skills-cloud {
    position: relative;
    min-height: 320px;
    margin-bottom: 48px;
    perspective: 900px;
    transform-style: preserve-3d;
}

.skill-orb {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(var(--tx, -50%), var(--ty, -50%), var(--tz, 0px));
    padding: 16px 24px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.25), rgba(156, 107, 255, 0.2));
    color: var(--text-primary);
    font-weight: 600;
    border: 1px solid rgba(79, 195, 247, 0.32);
    box-shadow: 0 18px 40px rgba(79, 195, 247, 0.2);
    animation: float 8s ease-in-out infinite;
}

.skill-orb:nth-child(odd) {
    background: linear-gradient(135deg, rgba(93, 255, 176, 0.18), rgba(79, 195, 247, 0.26));
    border-color: rgba(93, 255, 176, 0.3);
}

@keyframes float {
    0%, 100% { transform: translate3d(var(--tx, -50%), var(--ty, -50%), var(--tz, 0px)); }
    50% { transform: translate3d(calc(var(--tx, -50%) + 12px), calc(var(--ty, -50%) - 18px), calc(var(--tz, 0px) + 30px)); }
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
}

.skill-panel {
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(9, 11, 20, 0.85);
    backdrop-filter: blur(12px);
    min-height: 180px;
}

.skill-panel h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.skill-panel p {
    color: var(--text-secondary);
    line-height: 1.5;
}

.projects {
    max-width: var(--max-width);
    margin: 0 auto;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
}

.project-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(79, 195, 247, 0.18);
    background: rgba(9, 12, 22, 0.85);
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-height: 360px;
    transform-style: preserve-3d;
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.project-header h3 {
    font-size: 1.6rem;
}

.project-year {
    font-size: 0.85rem;
    color: var(--accent-1);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.project-summary {
    color: var(--text-primary);
    font-weight: 600;
}

.project-detail {
    color: var(--text-secondary);
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
}

.project-tags li {
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(79, 195, 247, 0.12);
    color: var(--accent-1);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.project-links {
    display: flex;
    gap: 16px;
    margin-top: auto;
}

.project-links a {
    color: var(--accent-1);
    text-decoration: none;
    font-weight: 600;
    position: relative;
}

.project-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-medium);
}

.project-links a:hover::after {
    transform: scaleX(1);
}

.journey {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

.timeline {
    position: relative;
    display: grid;
    gap: 32px;
    margin-top: 48px;
}

.timeline-track {
    position: absolute;
    left: calc(50% - 1px);
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, rgba(79, 195, 247, 0.2), rgba(156, 107, 255, 0.6));
}

.timeline-card {
    position: relative;
    width: clamp(280px, 40vw, 480px);
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(7, 10, 18, 0.9);
    box-shadow: var(--shadow-soft);
    transform-style: preserve-3d;
}

.timeline-card:nth-of-type(odd) {
    justify-self: flex-start;
    margin-left: 6%;
}

.timeline-card:nth-of-type(even) {
    justify-self: flex-end;
    margin-right: 6%;
}

.timeline-card::before {
    content: "";
    position: absolute;
    top: 24px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-2);
    box-shadow: 0 0 18px rgba(156, 107, 255, 0.7);
}

.timeline-card:nth-of-type(odd)::before {
    right: -7px;
}

.timeline-card:nth-of-type(even)::before {
    left: -7px;
}

.timeline-year {
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    color: var(--accent-1);
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}

.timeline-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.timeline-card p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.timeline-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-muted);
}

.labs {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

.labs-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.lab-card {
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(7, 9, 16, 0.8);
    min-height: 180px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform var(--transition-medium), border var(--transition-medium);
}

.lab-card:hover {
    transform: translateY(-8px);
    border-color: rgba(93, 255, 176, 0.35);
}

.contact {
    max-width: 860px;
    margin: 0 auto;
}

.contact-card {
    padding: clamp(32px, 6vw, 64px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(79, 195, 247, 0.18);
    background: linear-gradient(140deg, rgba(9, 12, 22, 0.9), rgba(11, 18, 30, 0.85));
    box-shadow: var(--shadow-strong);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-links a:hover {
    color: var(--accent-1);
}

.footer {
    padding: 48px 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

[data-observer] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 600ms ease, transform 600ms ease;
}

[data-observer].visible {
    opacity: 1;
    transform: translateY(0);
}

[data-tilt] {
    transition: transform var(--transition-medium), box-shadow var(--transition-fast);
}

[data-tilt].tilt-active {
    box-shadow: 0 28px 70px rgba(79, 195, 247, 0.25);
}

@media (max-width: 1080px) {
    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-meta {
        grid-template-columns: 1fr;
    }

    .portrait-floating-card {
        position: relative;
        inset: auto;
        margin-top: 18px;
        transform: none;
        width: 100%;
    }

    .skill-panel,
    .about-card,
    .project-card,
    .timeline-card {
        transform: none !important;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .skill-orb {
        position: relative;
        transform: none !important;
        animation: float 10s ease-in-out infinite;
        margin: 14px auto;
        display: inline-flex;
    }

    .skills-cloud {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 14px;
        min-height: auto;
    }

    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .about-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .labs-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .timeline-track {
        display: none;
    }

    .timeline-card {
        justify-self: center !important;
        margin: 0 !important;
        width: 100%;
    }

    .timeline-card::before {
        display: none;
    }
}

@media (max-width: 720px) {
    .nav {
        border-radius: 24px;
    }

    .nav-links {
        position: absolute;
        top: 80px;
        right: clamp(16px, 5vw, 36px);
        background: rgba(7, 9, 16, 0.96);
        border-radius: var(--radius-md);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: var(--shadow-soft);
        flex-direction: column;
        padding: 16px;
        gap: 12px;
        transform: translateY(-16px);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-medium), transform var(--transition-medium);
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 32px;
    }

    .hero-cta {
        flex-direction: column;
    }

    main {
        gap: 100px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

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

    .labs-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}