/* ========================================
   FUTURISTIC PORTFOLIO — STYLE SYSTEM
   ======================================== */

/* ----- Custom Properties ----- */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #0d0d2b;
    --bg-card: rgba(15, 15, 40, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(255, 255, 255, 0.08);

    --cyan: #00f0ff;
    --cyan-dim: rgba(0, 240, 255, 0.15);
    --purple: #b066ff;
    --purple-dim: rgba(176, 102, 255, 0.15);
    --pink: #ff2daa;
    --green: #00ff88;

    --gradient-main: linear-gradient(135deg, var(--cyan), var(--purple));
    --gradient-card: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(176, 102, 255, 0.08));
    --gradient-border: linear-gradient(135deg, var(--cyan), var(--purple), var(--pink));

    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #555577;

    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----- Light Mode Overrides ----- */
[data-theme="light"] {
    --bg-primary: #f0f2f8;
    --bg-secondary: #e4e7f0;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --border-glass: rgba(0, 0, 0, 0.08);

    --cyan: #0099cc;
    --cyan-dim: rgba(0, 153, 204, 0.12);
    --purple: #7c3aed;
    --purple-dim: rgba(124, 58, 237, 0.1);
    --pink: #d6336c;
    --green: #059669;

    --gradient-main: linear-gradient(135deg, #0099cc, #7c3aed);
    --gradient-card: linear-gradient(135deg, rgba(0, 153, 204, 0.08), rgba(124, 58, 237, 0.08));
    --gradient-border: linear-gradient(135deg, #0099cc, #7c3aed, #d6336c);

    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #7a7a9a;
}

[data-theme="light"] .nav.scrolled {
    background: rgba(240, 242, 248, 0.9);
}

[data-theme="light"] .hero::before {
    background: radial-gradient(circle at 30% 40%, rgba(0, 153, 204, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
}

[data-theme="light"] .timeline-dot {
    background: var(--bg-primary);
}

[data-theme="light"] .orbit-core {
    box-shadow: 0 0 40px rgba(0, 153, 204, 0.2), 0 0 80px rgba(124, 58, 237, 0.1);
}

[data-theme="light"] .btn-primary {
    color: #ffffff;
}

[data-theme="light"] .project-card-glow {
    background: radial-gradient(circle, rgba(0, 153, 204, 0.08) 0%, transparent 70%);
}

[data-theme="light"] .skill-bar {
    background: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] ::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-main);
    border-radius: 3px;
}

/* ----- Canvas ----- */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ----- Layout ----- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    position: relative;
    padding: 120px 0;
    z-index: 1;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--cyan);
    letter-spacing: 2px;
    display: block;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: 1px;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-line {
    width: 80px;
    height: 3px;
    background: var(--gradient-main);
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ----- Navigation ----- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.nav.scrolled {
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 10px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 2px;
}

.logo-bracket {
    color: var(--cyan);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 1px;
}

/* Theme Toggle */
.theme-toggle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: var(--transition);
    position: relative;
    margin-left: 12px;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
    transform: rotate(15deg);
}

.theme-toggle .icon-sun {
    position: absolute;
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
    transition: var(--transition);
}

.theme-toggle .icon-moon {
    position: absolute;
    opacity: 1;
    transform: rotate(0deg) scale(1);
    transition: var(--transition);
}

[data-theme="light"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

/* ----- Hero Section ----- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 24px 60px;
    z-index: 1;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(176, 102, 255, 0.06) 0%, transparent 50%);
    animation: heroGlow 12s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(-5%, 5%) scale(1.1);
    }
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border: 1px solid var(--cyan-dim);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--cyan);
    font-weight: 500;
    margin-bottom: 28px;
    background: rgba(0, 240, 255, 0.04);
    animation: fadeInUp 0.8s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4);
    }

    50% {
        opacity: 0.8;
        box-shadow: 0 0 0 8px rgba(0, 255, 136, 0);
    }
}

.hero-name {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease-out 0.15s both;
}

.hero-first {
    display: block;
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--text-primary);
}

.hero-last {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-wrapper {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--cyan);
    margin-bottom: 20px;
    height: 32px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.cursor {
    animation: blink 1s step-end infinite;
    color: var(--cyan);
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    animation: fadeInUp 0.8s ease-out 0.45s both;
}

.highlight {
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0.5;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-main);
    color: #0a0a1a;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero Logo */
.hero-logo {
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out both;
}

.logo-svg {
    width: 220px;
    height: 60px;
    display: block;
}

.logo-tagline {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 4px;
    color: var(--text-muted);
    margin-top: 6px;
    text-transform: uppercase;
}

/* Cert card as link */
a.cert-card {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

a.cert-card:hover {
    border-color: var(--cyan);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 240, 255, 0.15);
}

.cert-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.cert-link-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--cyan);
    margin-top: 8px;
    opacity: 0;
    transform: translateY(4px);
    transition: var(--transition);
}

a.cert-card:hover .cert-link-label {
    opacity: 1;
    transform: translateY(0);
}

/* Skill category icon as SVG */
.skill-cat-icon svg {
    color: var(--cyan);
}

.btn-linkedin {
    background: linear-gradient(135deg, #0077b5, #00a0dc);
    color: #fff;
}

.btn-linkedin:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 119, 181, 0.4);
}

/* Neural Network Section */
.nn-section {
    position: relative;
    padding: 100px 0;
    z-index: 1;
    overflow: hidden;
    border-top: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
}

.nn-section canvas {
    width: 100%;
    height: 350px;
    display: block;
}

.nn-section .nn-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
    pointer-events: none;
}

.nn-overlay h2 {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
}

.nn-overlay p {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--cyan);
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 48px;
    animation: fadeInUp 0.8s ease-out 0.75s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-plus {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--cyan);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 0.5px;
}

/* Hero Visual — Orbit */
.hero-visual {
    position: absolute;
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    z-index: 1;
}

.orbit-ring {
    position: absolute;
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ring-1 {
    width: 200px;
    height: 200px;
    border-color: rgba(0, 240, 255, 0.1);
    animation: rotateRing 20s linear infinite;
}

.ring-2 {
    width: 300px;
    height: 300px;
    border-color: rgba(176, 102, 255, 0.08);
    animation: rotateRing 30s linear infinite reverse;
}

.ring-3 {
    width: 400px;
    height: 400px;
    border-color: rgba(255, 45, 170, 0.05);
    animation: rotateRing 40s linear infinite;
}

@keyframes rotateRing {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.orbit-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: #0a0a1a;
    box-shadow: 0 0 60px rgba(0, 240, 255, 0.3), 0 0 120px rgba(176, 102, 255, 0.15);
    animation: corePulse 3s ease-in-out infinite;
}

@keyframes corePulse {

    0%,
    100% {
        box-shadow: 0 0 60px rgba(0, 240, 255, 0.3), 0 0 120px rgba(176, 102, 255, 0.15);
    }

    50% {
        box-shadow: 0 0 80px rgba(0, 240, 255, 0.5), 0 0 160px rgba(176, 102, 255, 0.25);
    }
}

.orbit-node {
    position: absolute;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(8px);
    animation: float 6s ease-in-out infinite;
}

.node-1 {
    top: 50%;
    left: -4%;
    transform: translateY(-50%);
    animation-delay: 0s;
}

.node-2 {
    top: 8%;
    left: 25%;
    animation-delay: 1s;
}

.node-3 {
    top: 8%;
    right: 25%;
    animation-delay: 2s;
}

.node-4 {
    top: 50%;
    right: -4%;
    transform: translateY(-50%);
    animation-delay: 3s;
}

.node-5 {
    bottom: 8%;
    left: 25%;
    animation-delay: 4s;
}

.node-6 {
    bottom: 8%;
    right: 25%;
    animation-delay: 5s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(-50%) translateX(0);
    }

    50% {
        transform: translateY(calc(-50% - 8px)) translateX(4px);
    }
}

.node-2,
.node-3,
.node-5,
.node-6 {
    animation-name: floatAlt;
}

@keyframes floatAlt {

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

    50% {
        transform: translateY(-10px);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 1px;
    animation: fadeInUp 0.8s ease-out 1s both;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-dot {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--cyan);
    border-radius: 2px;
    animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
    0% {
        top: 6px;
        opacity: 1;
    }

    100% {
        top: 20px;
        opacity: 0;
    }
}

/* ----- About ----- */
.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.02rem;
}

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

.about-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.info-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    gap: 14px;
    align-items: center;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

.info-card:hover {
    border-color: var(--cyan);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.08);
}

.info-card-icon {
    font-size: 1.6rem;
}

.info-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.info-value {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ----- Timeline ----- */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan), var(--purple), var(--pink), var(--cyan));
    background-size: 200% 200%;
    animation: timelineGlow 6s linear infinite;
}

@keyframes timelineGlow {
    0% {
        background-position: 50% 0%;
    }

    50% {
        background-position: 50% 100%;
    }

    100% {
        background-position: 50% 0%;
    }
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding: 0 0 60px;
    position: relative;
    width: 50%;
}

.timeline-item[data-side="left"] {
    align-self: flex-start;
    padding-right: 50px;
}

.timeline-item[data-side="right"] {
    align-self: flex-end;
    justify-content: flex-start;
    margin-left: 50%;
    padding-left: 50px;
}

.timeline-marker {
    position: absolute;
}

.timeline-item[data-side="left"] .timeline-marker {
    right: -9px;
}

.timeline-item[data-side="right"] .timeline-marker {
    left: -9px;
}

.timeline-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--purple);
    position: relative;
}

.timeline-dot.active-dot {
    border-color: var(--cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

.timeline-dot.active-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cyan);
    animation: pulse 2s infinite;
}

.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
    width: 100%;
}

.timeline-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.timeline-card-header {
    margin-bottom: 16px;
}

.timeline-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.timeline-badge.current {
    background: rgba(0, 255, 136, 0.12);
    color: var(--green);
    border: 1px solid rgba(0, 255, 136, 0.25);
}

.timeline-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-card h4 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--cyan);
    margin-bottom: 10px;
}

.timeline-meta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-right: 16px;
}

.timeline-meta svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.timeline-thesis-title {
    font-style: italic;
    color: var(--text-secondary);
    margin: 12px 0;
    font-size: 0.92rem;
    padding-left: 12px;
    border-left: 2px solid var(--purple);
}

.timeline-details {
    list-style: none;
    margin: 16px 0;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-details li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--cyan);
    font-size: 0.9rem;
}

.timeline-details li strong {
    color: var(--text-primary);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--cyan-dim);
    color: var(--cyan);
    border: 1px solid rgba(0, 240, 255, 0.15);
    letter-spacing: 0.5px;
}

/* ----- Education ----- */
.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 36px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-main);
}

.education-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.edu-icon {
    color: var(--cyan);
    margin-bottom: 20px;
}

.edu-content h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.edu-content h4 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--purple);
    margin-bottom: 8px;
}

.edu-school {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 14px;
}

.edu-meta {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 18px;
}

.edu-focus {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-focus span {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--purple-dim);
    color: var(--purple);
    border: 1px solid rgba(176, 102, 255, 0.15);
}

/* ----- Projects ----- */
.projects-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 8px 22px;
    border-radius: 30px;
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--cyan-dim);
    border-color: var(--cyan);
    color: var(--cyan);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(12px);
}

.project-card-glow {
    position: absolute;
    top: -100%;
    left: -100%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-slow);
    pointer-events: none;
}

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

.project-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.project-card.hidden {
    display: none;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.project-icon {
    font-size: 2rem;
}

.project-status {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-status.live {
    background: rgba(0, 255, 136, 0.1);
    color: var(--green);
    border: 1px solid rgba(0, 255, 136, 0.2);
}

.project-status.completed {
    background: rgba(0, 240, 255, 0.1);
    color: var(--cyan);
    border: 1px solid rgba(0, 240, 255, 0.2);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}

.project-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(176, 102, 255, 0.08);
    color: var(--purple);
    border: 1px solid rgba(176, 102, 255, 0.12);
}

/* ----- Skills ----- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 30px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.skill-category:hover {
    border-color: rgba(0, 240, 255, 0.15);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.skill-cat-icon {
    font-size: 1.6rem;
}

.skill-category-header h3 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.skill-item {
    margin-bottom: 18px;
}

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

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.88rem;
}

.skill-info span:first-child {
    color: var(--text-secondary);
}

.skill-info span:last-child {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--cyan);
}

.skill-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    width: 0;
    border-radius: 3px;
    background: var(--gradient-main);
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.skill-fill::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 20px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
    border-radius: 3px;
}

/* ----- Certifications ----- */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: var(--transition);
    backdrop-filter: blur(12px);
}

.cert-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.cert-badge {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan);
    border: 1px solid var(--cyan-dim);
}

.cert-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.82rem;
    color: var(--purple);
    margin-bottom: 6px;
}

.cert-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ----- Contact ----- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-info>p {
    color: var(--text-secondary);
    margin-bottom: 36px;
    font-size: 1rem;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition);
}

a.contact-link:hover {
    border-color: var(--cyan);
    transform: translateX(8px);
}

.contact-link-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--gradient-card);
    color: var(--cyan);
    flex-shrink: 0;
    border: 1px solid var(--cyan-dim);
}

.contact-link-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-link-value {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 36px;
    backdrop-filter: blur(12px);
}

.form-group {
    position: relative;
    margin-bottom: 28px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group label {
    position: absolute;
    top: 14px;
    left: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
}

.form-group input:focus~label,
.form-group input:not(:placeholder-shown)~label,
.form-group textarea:focus~label,
.form-group textarea:not(:placeholder-shown)~label {
    top: -10px;
    font-size: 0.72rem;
    color: var(--cyan);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: var(--transition);
}

.form-group input:focus~.form-line,
.form-group textarea:focus~.form-line {
    width: 100%;
}

/* ----- Footer ----- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-glass);
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.footer-text {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: var(--text-muted);
    transition: var(--transition);
}

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

/* ----- Animations ----- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ----- Responsive ----- */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .hero {
        justify-content: flex-start;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-glass);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: 24px;
    }

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

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item[data-side="left"],
    .timeline-item[data-side="right"] {
        width: 100%;
        margin-left: 0;
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-item[data-side="left"] .timeline-marker,
    .timeline-item[data-side="right"] .timeline-marker {
        left: 11px;
        right: auto;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .section {
        padding: 80px 0;
    }

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

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

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

@media (max-width: 480px) {
    .hero-name .hero-first {
        font-size: 1.8rem;
    }

    .hero-name .hero-last {
        font-size: 2.2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .stat {
        text-align: left;
    }
}
/* ===== AI Visuals Section ===== */
.section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 8px;
    font-family: var(--font-mono);
}

.ai-visuals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

@media (max-width: 900px) {
    .ai-visuals-grid { grid-template-columns: 1fr; }
}

.ai-diagram-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-diagram-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0;
    transition: var(--transition);
}

.ai-diagram-card:hover::before { opacity: 1; }
.ai-diagram-card:hover {
    border-color: var(--cyan);
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(0,240,255,0.1);
}

.diagram-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.diagram-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.diagram-status {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 500;
}

.diagram-status.live {
    background: rgba(0,255,136,0.1);
    color: #00ff88;
    border: 1px solid rgba(0,255,136,0.3);
}

.diagram-status.active {
    background: rgba(0,240,255,0.1);
    color: var(--cyan);
    border: 1px solid rgba(0,240,255,0.3);
}

.diagram-status.research {
    background: rgba(176,102,255,0.1);
    color: var(--purple);
    border: 1px solid rgba(176,102,255,0.3);
}

.diagram-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.diagram-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.diagram-container {
    background: rgba(0,0,0,0.25);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 16px;
    overflow: hidden;
}

.diagram-container svg {
    width: 100%;
    height: auto;
}

.diagram-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.diagram-tags span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 3px 10px;
    background: var(--cyan-dim);
    border: 1px solid rgba(0,240,255,0.2);
    border-radius: 4px;
    color: var(--cyan);
}

/* Radar chart legend */
.radar-legend {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 130px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-metric {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 1px 0;
    padding-left: 18px;
}