:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #0d1117;
    --bg-terminal: #0c0c0c;
    --green: #00ff41;
    --green-dim: #00cc33;
    --green-glow: rgba(0, 255, 65, 0.3);
    --cyan: #00d4ff;
    --cyan-dim: #00a8cc;
    --cyan-glow: rgba(0, 212, 255, 0.3);
    --red: #ff3e3e;
    --yellow: #ffdd57;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --text-dim: #555555;
    --border: #1a1a2e;

    /* Typography */
    --font-mono: "Fira Code", "JetBrains Mono", "Courier New", monospace;

    /* Spacing */
    --nav-height: 60px;
    --section-padding: 100px 0;
    --container-width: 1100px;
    --gap: 2rem;

    /* Z-index layers */
    --z-canvas: 1;
    --z-scanline: 2;
    --z-content: 3;
    --z-nav: 10;
    --z-hamburger: 11;
    --z-mobile-menu: 9;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
}

/* ============================================
   Reset & Base
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body.nav-open {
    overflow: hidden;
}

a {
    color: var(--green);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--cyan);
}

::selection {
    background: var(--green);
    color: var(--bg-primary);
}

/* ============================================
   Matrix Canvas
   ============================================ */
#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-canvas);
    pointer-events: none;
}

/* ============================================
   Scanline Overlay
   ============================================ */
.scanline-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-scanline);
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: var(--z-nav);
    transition: background var(--transition-base);
}

.nav-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--green) !important;
    white-space: nowrap;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.nav-links a {
    display: block;
    padding: 0.5rem 0.85rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-radius: 4px;
    transition:
        color var(--transition-fast),
        background var(--transition-fast);
    position: relative;
}

.nav-links a::before {
    content: attr(data-cmd);
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.nav-links a:hover {
    color: var(--green);
    background: rgba(0, 255, 65, 0.05);
}

.nav-links a.active {
    color: var(--green);
    background: rgba(0, 255, 65, 0.08);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: var(--z-hamburger);
    padding: 0;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--green);
    transition:
        transform var(--transition-base),
        opacity var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   Section Common
   ============================================ */
.section {
    position: relative;
    z-index: var(--z-content);
    padding: var(--section-padding);
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: 2rem;
    padding-right: 2rem;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--green);
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: 0.05em;
    position: relative;
}

/* Glitch Effect */
.glitch {
    position: relative;
    animation: glitch-skew 4s infinite linear alternate-reverse;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    text-align: center;
}

.glitch::before {
    color: var(--cyan);
    animation: glitch-1 3s infinite linear alternate-reverse;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}

.glitch::after {
    color: var(--red);
    animation: glitch-2 2.5s infinite linear alternate-reverse;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
}

@keyframes glitch-1 {
    0%,
    90%,
    100% {
        transform: translate(0);
    }
    92% {
        transform: translate(-2px, 1px);
    }
    94% {
        transform: translate(2px, -1px);
    }
    96% {
        transform: translate(-1px, 2px);
    }
    98% {
        transform: translate(1px, -2px);
    }
}

@keyframes glitch-2 {
    0%,
    88%,
    100% {
        transform: translate(0);
    }
    90% {
        transform: translate(2px, 1px);
    }
    93% {
        transform: translate(-2px, -1px);
    }
    96% {
        transform: translate(1px, 2px);
    }
}

@keyframes glitch-skew {
    0%,
    95%,
    100% {
        transform: skew(0deg);
    }
    96% {
        transform: skew(0.5deg);
    }
    97% {
        transform: skew(-0.3deg);
    }
    98% {
        transform: skew(0.4deg);
    }
    99% {
        transform: skew(-0.2deg);
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    z-index: var(--z-content);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.terminal-window {
    background: var(--bg-terminal);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%;
    max-width: 750px;
    box-shadow:
        0 0 30px rgba(0, 255, 65, 0.05),
        0 20px 60px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red {
    background: #ff5f57;
}
.dot.yellow {
    background: #febc2e;
}
.dot.green {
    background: #28c840;
}

.terminal-title {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.terminal-body {
    padding: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.8;
}

.terminal-line {
    display: none;
}

.terminal-line.visible {
    display: block;
}

.prompt {
    color: var(--green);
    font-weight: 600;
}

.command {
    color: var(--text-primary);
}

.terminal-output {
    display: none;
    color: var(--cyan);
    padding-left: 1rem;
    margin-bottom: 0.5rem;
}

.terminal-output.visible {
    display: block;
}

#output-whoami.visible {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--green);
    padding-left: 0;
    margin-bottom: 0.25rem;
}

#output-title.visible {
    font-size: 1rem;
    color: var(--cyan);
    padding-left: 0;
    margin-bottom: 0.75rem;
}

#output-position.visible {
    font-size: 0.9rem;
    color: var(--yellow);
    padding-left: 0;
    margin-bottom: 0.5rem;
}

#output-bio.visible {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-left: 0;
    margin-bottom: 0.75rem;
}

/* Blinking cursor */
.cursor {
    color: var(--green);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
}

/* ============================================
   About Section
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
    align-items: start;
}

.about-bio p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.json-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color var(--transition-base);
}

.json-card:hover {
    border-color: var(--green-dim);
}

.json-header {
    font-size: 0.85rem;
    color: var(--green);
    padding: 0.75rem 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.json-body {
    padding: 1.25rem;
    font-size: 0.85rem;
    line-height: 1.75;
    margin: 0;
    overflow-x: auto;
}

.json-bracket {
    color: var(--text-secondary);
}

.json-key {
    color: var(--cyan);
}

.json-string {
    color: var(--green);
}

/* ============================================
   Timeline (Education)
   ============================================ */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 2.5rem;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        var(--green),
        var(--green-dim),
        transparent
    );
    box-shadow: 0 0 10px var(--green-glow);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

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

.timeline-dot {
    position: absolute;
    left: -2.5rem;
    top: 0.25rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--green);
    transform: translateX(-6px);
    box-shadow: 0 0 10px var(--green-glow);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%,
    100% {
        box-shadow: 0 0 10px var(--green-glow);
    }
    50% {
        box-shadow:
            0 0 20px var(--green-glow),
            0 0 30px rgba(0, 255, 65, 0.15);
    }
}

.timeline-content {
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--green-dim);
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--green);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.timeline-content h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0.25rem 0;
}

.timeline-org {
    font-size: 0.8rem;
    color: var(--cyan);
    margin-bottom: 0.5rem;
}

.timeline-content p:last-child {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* ============================================
   Experience Cards
   ============================================ */
.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
}

.experience-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
}

.experience-card:hover {
    transform: translateY(-4px);
    border-color: var(--cyan-dim);
    box-shadow: 0 0 20px var(--cyan-glow);
}

.card-accent {
    height: 3px;
    background: linear-gradient(90deg, var(--green), var(--cyan));
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.experience-role {
    display: block;
    font-size: 0.85rem;
    color: var(--cyan);
    margin-bottom: 0.25rem;
}

.experience-tech {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--green);
    background: rgba(0, 255, 65, 0.08);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    margin-bottom: 0.75rem;
}

.experience-current {
    display: inline-block;
    font-size: 0.7rem;
    color: var(--bg-primary);
    background: var(--green);
    padding: 0.1rem 0.5rem;
    border-radius: 3px;
    margin-left: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    vertical-align: middle;
}

.experience-card.current {
    border-color: rgba(0, 255, 65, 0.25);
}

.card-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Project Cards
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
}

.project-card {
    display: block;
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.75rem;
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
    overflow: hidden;
    color: inherit;
    text-decoration: none;
}

.project-link-icon {
    font-size: 0.85em;
    color: var(--green);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.project-card:hover .project-link-icon {
    opacity: 1;
}

.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 8px;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(0, 255, 65, 0.06),
        transparent 40%
    );
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--green-dim);
    box-shadow: 0 0 25px rgba(0, 255, 65, 0.08);
}

.project-card:hover::before {
    opacity: 1;
}

.project-index {
    font-size: 0.8rem;
    color: var(--green);
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.project-card h3 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.project-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.project-tags span {
    font-size: 0.7rem;
    color: var(--cyan);
    border: 1px solid rgba(0, 212, 255, 0.2);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    background: rgba(0, 212, 255, 0.05);
}

/* ============================================
   Research Cards
   ============================================ */
.research-grid {
    max-width: 750px;
    margin: 0 auto;
}

.research-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
}

.research-card:hover {
    transform: translateY(-4px);
    border-color: var(--cyan-dim);
    box-shadow: 0 0 25px var(--cyan-glow);
}

.research-card:hover .project-link-icon {
    opacity: 1;
}

.research-label {
    font-size: 0.75rem;
    color: var(--cyan);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.research-card h3 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.research-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.research-finding {
    color: var(--yellow) !important;
    font-style: italic;
}

.research-card .project-tags {
    margin-top: 0.5rem;
}

/* ============================================
   Media Log
   ============================================ */
.media-log {
    max-width: 750px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.log-entry {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.85rem;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-timestamp {
    color: var(--text-dim);
    font-size: 0.75rem;
    white-space: nowrap;
    min-width: 60px;
}

.log-source {
    color: var(--cyan);
    font-weight: 600;
    white-space: nowrap;
    min-width: 120px;
}

.log-message {
    color: var(--text-secondary);
}

.log-entry-link {
    text-decoration: none;
    color: inherit;
    border-radius: 4px;
    margin: 0 -0.5rem;
    padding: 0.75rem 0.5rem !important;
    transition: background var(--transition-fast);
}

.log-entry-link:hover {
    background: rgba(0, 255, 65, 0.04);
    color: inherit;
}

.log-entry-link:hover .log-source {
    color: var(--green);
}

.log-entry-link:hover .project-link-icon {
    opacity: 1;
}

/* ============================================
   Contact Terminal
   ============================================ */
.contact-terminal {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-terminal);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
}

.contact-line {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.contact-link {
    display: block;
    font-size: 0.9rem;
    color: var(--cyan);
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--green);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    position: relative;
    z-index: var(--z-content);
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-dim);
}

.footer-sub {
    margin-top: 0.25rem;
    font-size: 0.7rem;
    color: var(--text-dim);
}

/* ============================================
   Scroll Animations
   ============================================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity var(--transition-slow),
        transform var(--transition-slow);
}

.animate-on-scroll.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive - Tablet (1024px)
   ============================================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

/* ============================================
   Responsive - Mobile (768px)
   ============================================ */
@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        justify-content: center;
        padding: 2rem;
        gap: 0.5rem;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: var(--z-mobile-menu);
        border-left: 1px solid var(--border);
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-links a {
        font-size: 1rem;
        padding: 0.75rem 1rem;
    }

    .experience-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.3rem;
    }

    #output-whoami.visible {
        font-size: 1.4rem;
    }

    .log-entry {
        flex-direction: column;
        gap: 0.25rem;
    }

    .log-source {
        min-width: auto;
    }
}

/* ============================================
   Responsive - Small Mobile (480px)
   ============================================ */
@media (max-width: 480px) {
    :root {
        --section-padding: 50px 0;
    }

    .section {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .nav-inner {
        padding: 0 1rem;
    }

    .terminal-body {
        padding: 1rem;
        font-size: 0.85rem;
    }

    #output-whoami.visible {
        font-size: 1.2rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline-dot {
        left: -2rem;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}