/* ===== CSS Variables ===== */
:root {
    --color-bg: #06070d;
    --color-bg-alt: #0b0d15;
    --color-surface: #111320;
    --color-surface-hover: #191c2e;
    --color-border: #1f2237;
    --color-text: #e4e6f2;
    --color-text-secondary: #9395ad;
    --color-text-muted: #5a5d76;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-accent: #06d6a0;
    --color-accent-light: #34edb3;
    /* Domain accent colors */
    --color-llm: #818cf8;
    --color-gen: #06d6a0;
    --color-cv: #38bdf8;
    --color-seg: #fb7185;
    --color-sys: #f59e0b;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
}

/* ===== Skip Link (Accessibility) ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 10000;
    background: var(--color-primary);
    color: white;
    padding: 10px 20px;
    border-radius: 0 0 8px 8px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    color: white;
}

/* ===== Focus States (Accessibility) ===== */
*:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 3px;
    border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 3px;
}

/* Remove outline for mouse users, keep for keyboard */
:focus:not(:focus-visible) {
    outline: none;
}

/* ===== 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-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===== Grid Background ===== */
.grid-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 100%);
}

/* ===== Noise / Grain Texture Overlay ===== */
.noise-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    pointer-events: none;
    opacity: 0.035;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 180px 180px;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent-light);
}

img {
    max-width: 100%;
    display: block;
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), background var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-logo:hover {
    color: var(--color-primary-light);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.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(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 120px 24px 80px;
}

.hero-content {
    flex: 1;
}

/* ===== Currently Working On Status ===== */
.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(6, 214, 160, 0.06);
    border: 1px solid rgba(6, 214, 160, 0.15);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(6, 214, 160, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(6, 214, 160, 0); }
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    font-family: var(--font-mono);
    letter-spacing: 0.01em;
}

.hero-greeting {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary-light);
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-llm) 50%, var(--color-gen) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

/* Domain tags in hero */
.hero-domains {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.domain-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 100px;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.domain-llm {
    background: rgba(129, 140, 248, 0.1);
    color: var(--color-llm);
    border: 1px solid rgba(129, 140, 248, 0.2);
}

.domain-gen {
    background: rgba(6, 214, 160, 0.1);
    color: var(--color-gen);
    border: 1px solid rgba(6, 214, 160, 0.2);
}

.domain-cv {
    background: rgba(56, 189, 248, 0.1);
    color: var(--color-cv);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.domain-seg {
    background: rgba(251, 113, 133, 0.1);
    color: var(--color-seg);
    border: 1px solid rgba(251, 113, 133, 0.2);
}

.hero-location {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.terminal-prompt {
    color: var(--color-gen);
    font-weight: 700;
}

.hero-cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
    filter: brightness(1.1);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.btn-tertiary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 10px 20px;
    font-size: 0.85rem;
}

.btn-tertiary:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

/* ===== Hero Graphic ===== */
.hero-visual {
    flex: 0 0 320px;
}

.hero-graphic {
    position: relative;
    width: 320px;
    height: 320px;
}

.ai-constellation {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 30px rgba(167, 139, 250, 0.08));
}

.constellation-node {
    animation: nodePulse 4s ease-in-out infinite;
}

.constellation-node:nth-child(odd) {
    animation-delay: 0.5s;
}

@keyframes nodePulse {
    0%, 100% { filter: drop-shadow(0 0 4px currentColor); }
    50% { filter: drop-shadow(0 0 12px currentColor); }
}

/* ===== Sections ===== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-llm), var(--color-cv), var(--color-gen));
    border-radius: 2px;
}

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

.about-text p {
    margin-bottom: 16px;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-text strong {
    color: var(--color-text);
    font-weight: 600;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 20px 28px;
    text-align: center;
    min-width: 160px;
    transition: all var(--transition);
}

.highlight-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.highlight-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-light);
    line-height: 1;
    margin-bottom: 4px;
}

.highlight-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ===== Timeline ===== */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

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

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 2px solid var(--color-bg-alt);
    z-index: 1;
}

.timeline-item:first-child .timeline-marker {
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.25);
}

.timeline-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px 28px;
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.timeline-role {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
}

.timeline-company {
    font-size: 0.95rem;
    color: var(--color-primary-light);
    font-weight: 500;
    margin-top: 2px;
}

.timeline-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    flex-shrink: 0;
}

.timeline-location {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-weight: 500;
}

.timeline-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

/* ===== Tags ===== */
.timeline-tags, .project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--color-primary-light);
    border: 1px solid rgba(99, 102, 241, 0.18);
}

/* ===== Projects ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 28px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-card-research {
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.project-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.08);
    border-radius: 12px;
    color: var(--color-primary-light);
    margin-bottom: 16px;
}

.project-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.project-title {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

/* ===== Skills ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.skill-category {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    transition: all var(--transition);
}

.skill-category:hover {
    border-color: var(--color-primary);
}

.skill-category-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text);
}

.skill-category-title svg {
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-badge {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 5px 14px;
    border-radius: 8px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.skill-badge:hover {
    color: var(--color-primary-light);
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.08);
}

/* ===== Education ===== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.education-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 28px;
    transition: all var(--transition);
}

.education-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.education-degree {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-primary-light);
    background: rgba(99, 102, 241, 0.08);
    display: inline-block;
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.education-field {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.education-school {
    font-size: 0.95rem;
    color: var(--color-primary-light);
    font-weight: 500;
    margin-bottom: 4px;
}

.education-location {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.education-coursework {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.education-honors {
    margin-top: 12px;
}

.honor-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(6, 214, 160, 0.1);
    color: var(--color-accent-light);
    border: 1px solid rgba(6, 214, 160, 0.2);
}

/* ===== Awards ===== */
.awards-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.awards-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.award-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.award-item svg {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.award-item strong {
    color: var(--color-text);
}

/* ===== Contact ===== */
.contact-intro {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    max-width: 600px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    transition: all var(--transition);
    color: var(--color-text);
}

.contact-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    color: var(--color-text);
}

.contact-card svg {
    color: var(--color-primary-light);
}

.contact-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    word-break: break-word;
}

/* ===== Footer ===== */
.footer {
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

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

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

.footer-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    transition: all var(--transition);
}

.footer-icon:hover {
    color: var(--color-primary-light);
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
    transform: translateY(-2px);
}

/* ===== Back to Top Button ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
    color: var(--color-primary-light);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.2);
}

/* ===== Typing Animation ===== */
.typing-text {
    display: inline;
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--color-gen);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: cursorBlink 0.8s step-end infinite;
}

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

/* ===== Project Card Enhanced Hover ===== */
.project-card {
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 14px;
    opacity: 0;
    transition: opacity 0.4s ease;
    background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.06), transparent 40%);
    pointer-events: none;
    z-index: 0;
}

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

.project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15), 0 0 0 1px rgba(99, 102, 241, 0.1);
}

/* Same enhanced hover for skill categories */
.skill-category {
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    opacity: 0;
    transition: opacity 0.4s ease;
    background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.06), transparent 40%);
    pointer-events: none;
    z-index: 0;
}

.skill-category:hover::before {
    opacity: 1;
}

/* ===== Project Featured (full-width) ===== */
.project-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 36px;
    margin-bottom: 24px;
    transition: all var(--transition);
}

.project-featured-stacked {
    grid-template-columns: 1fr;
    gap: 24px;
}

.project-featured:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.project-featured-header .project-label {
    margin-bottom: 6px;
}

.project-featured-header .project-title {
    font-size: 1.3rem;
    margin-bottom: 0;
}

.project-featured-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.project-diagram {
    width: 100%;
    max-width: 520px;
    height: auto;
}

.project-diagram-wide {
    width: 100%;
    min-width: 600px;
    height: auto;
}

/* ===== Project Action Buttons ===== */
.project-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.btn-code {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-sans);
    background: var(--color-surface-hover);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.btn-code:hover {
    color: var(--color-primary-light);
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
}

.project-nda {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: var(--font-mono);
    background: rgba(245, 158, 11, 0.06);
    color: var(--color-sys);
    border: 1px solid rgba(245, 158, 11, 0.15);
}

.project-nda svg {
    color: var(--color-sys);
}

.project-ongoing {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: var(--font-mono);
    background: rgba(99, 102, 241, 0.06);
    color: var(--color-primary-light);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.project-ongoing svg {
    color: var(--color-primary-light);
}

.project-featured-footer .project-description {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.project-featured-info .project-label {
    margin-bottom: 10px;
}

.project-featured-info .project-title {
    font-size: 1.25rem;
    margin-bottom: 14px;
}

/* ===== Project Card Visuals ===== */
.project-visual {
    background: rgba(10, 10, 15, 0.5);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 16px 12px;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-diagram-sm {
    width: 100%;
    max-width: 300px;
    height: auto;
}

/* ===== Diagram element animations ===== */
.diagram-el {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.project-featured.visible .diagram-el,
.project-featured.anim-visible .diagram-el {
    opacity: 1;
}

/* Stagger diagram elements */
.project-featured.visible .diagram-el[data-delay="0"],
.project-featured.anim-visible .diagram-el[data-delay="0"] { transition-delay: 0s; }
.project-featured.visible .diagram-el[data-delay="100"],
.project-featured.anim-visible .diagram-el[data-delay="100"] { transition-delay: 0.1s; }
.project-featured.visible .diagram-el[data-delay="150"],
.project-featured.anim-visible .diagram-el[data-delay="150"] { transition-delay: 0.15s; }
.project-featured.visible .diagram-el[data-delay="200"],
.project-featured.anim-visible .diagram-el[data-delay="200"] { transition-delay: 0.2s; }
.project-featured.visible .diagram-el[data-delay="250"],
.project-featured.anim-visible .diagram-el[data-delay="250"] { transition-delay: 0.25s; }
.project-featured.visible .diagram-el[data-delay="300"],
.project-featured.anim-visible .diagram-el[data-delay="300"] { transition-delay: 0.3s; }
.project-featured.visible .diagram-el[data-delay="350"],
.project-featured.anim-visible .diagram-el[data-delay="350"] { transition-delay: 0.35s; }
.project-featured.visible .diagram-el[data-delay="400"],
.project-featured.anim-visible .diagram-el[data-delay="400"] { transition-delay: 0.4s; }
.project-featured.visible .diagram-el[data-delay="450"],
.project-featured.anim-visible .diagram-el[data-delay="450"] { transition-delay: 0.45s; }
.project-featured.visible .diagram-el[data-delay="500"],
.project-featured.anim-visible .diagram-el[data-delay="500"] { transition-delay: 0.5s; }
.project-featured.visible .diagram-el[data-delay="600"],
.project-featured.anim-visible .diagram-el[data-delay="600"] { transition-delay: 0.6s; }
.project-featured.visible .diagram-el[data-delay="700"],
.project-featured.anim-visible .diagram-el[data-delay="700"] { transition-delay: 0.7s; }
.project-featured.visible .diagram-el[data-delay="750"],
.project-featured.anim-visible .diagram-el[data-delay="750"] { transition-delay: 0.75s; }
.project-featured.visible .diagram-el[data-delay="800"],
.project-featured.anim-visible .diagram-el[data-delay="800"] { transition-delay: 0.8s; }
.project-featured.visible .diagram-el[data-delay="820"],
.project-featured.anim-visible .diagram-el[data-delay="820"] { transition-delay: 0.82s; }
.project-featured.visible .diagram-el[data-delay="850"],
.project-featured.anim-visible .diagram-el[data-delay="850"] { transition-delay: 0.85s; }
.project-featured.visible .diagram-el[data-delay="900"],
.project-featured.anim-visible .diagram-el[data-delay="900"] { transition-delay: 0.9s; }
.project-featured.visible .diagram-el[data-delay="950"],
.project-featured.anim-visible .diagram-el[data-delay="950"] { transition-delay: 0.95s; }
.project-featured.visible .diagram-el[data-delay="1050"],
.project-featured.anim-visible .diagram-el[data-delay="1050"] { transition-delay: 1.05s; }
.project-featured.visible .diagram-el[data-delay="1100"],
.project-featured.anim-visible .diagram-el[data-delay="1100"] { transition-delay: 1.1s; }
.project-featured.visible .diagram-el[data-delay="1150"],
.project-featured.anim-visible .diagram-el[data-delay="1150"] { transition-delay: 1.15s; }
.project-featured.visible .diagram-el[data-delay="1200"],
.project-featured.anim-visible .diagram-el[data-delay="1200"] { transition-delay: 1.2s; }
.project-featured.visible .diagram-el[data-delay="1250"],
.project-featured.anim-visible .diagram-el[data-delay="1250"] { transition-delay: 1.25s; }
.project-featured.visible .diagram-el[data-delay="1300"],
.project-featured.anim-visible .diagram-el[data-delay="1300"] { transition-delay: 1.3s; }
.project-featured.visible .diagram-el[data-delay="1350"],
.project-featured.anim-visible .diagram-el[data-delay="1350"] { transition-delay: 1.35s; }
.project-featured.visible .diagram-el[data-delay="1400"],
.project-featured.anim-visible .diagram-el[data-delay="1400"] { transition-delay: 1.4s; }
.project-featured.visible .diagram-el[data-delay="1450"],
.project-featured.anim-visible .diagram-el[data-delay="1450"] { transition-delay: 1.45s; }
.project-featured.visible .diagram-el[data-delay="1500"],
.project-featured.anim-visible .diagram-el[data-delay="1500"] { transition-delay: 1.5s; }
.project-featured.visible .diagram-el[data-delay="1550"],
.project-featured.anim-visible .diagram-el[data-delay="1550"] { transition-delay: 1.55s; }
.project-featured.visible .diagram-el[data-delay="1600"],
.project-featured.anim-visible .diagram-el[data-delay="1600"] { transition-delay: 1.6s; }

/* ===== Scroll Animations ===== */
[data-anim] {
    opacity: 0;
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-anim="slide-up"] {
    transform: translateY(40px);
}

[data-anim="slide-left"] {
    transform: translateX(-50px);
}

[data-anim="slide-right"] {
    transform: translateX(50px);
}

[data-anim="scale-in"] {
    transform: scale(0.9);
}

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

/* Legacy fade-in (kept for staggered items) */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children delay */
.stagger-children > *:nth-child(1) { transition-delay: 0s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.08s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.16s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.24s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.32s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.40s; }

/* Hero entrance */
.hero-content > * {
    opacity: 0;
    transform: translateY(30px);
    animation: heroEntrance 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.25s; }
.hero-content > *:nth-child(3) { animation-delay: 0.4s; }
.hero-content > *:nth-child(4) { animation-delay: 0.5s; }
.hero-content > *:nth-child(5) { animation-delay: 0.6s; }
.hero-content > *:nth-child(6) { animation-delay: 0.7s; }
.hero-content > *:nth-child(7) { animation-delay: 0.8s; }

.hero-visual {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    animation: heroEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) 0.4s forwards;
}

@keyframes heroEntrance {
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Section title underline grow animation */
[data-anim="slide-up"].section-title.anim-visible::after {
    animation: underlineGrow 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
}

.section-title::after {
    transform-origin: left;
    transform: scaleX(0);
}

@keyframes underlineGrow {
    to { transform: scaleX(1); }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero {
        flex-direction: column;
        text-align: center;
        gap: 40px;
        padding-top: 100px;
        min-height: auto;
    }

    .hero-location {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        flex: 0 0 auto;
        position: relative;
    }

    .hero-graphic {
        width: 240px;
        height: 240px;
    }

    .hero-domains {
        justify-content: center;
    }

    .hero-status {
        justify-content: center;
    }

    /* Disable parallax on mobile — prevents overlap */
    [data-parallax] {
        transform: none !important;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-highlights {
        flex-direction: row;
        justify-content: center;
    }

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

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

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

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

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

    .timeline-header {
        flex-direction: column;
    }

    .timeline-meta {
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 32px;
    }

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

    .about-highlights {
        flex-direction: column;
        align-items: stretch;
    }

    .highlight-card {
        min-width: auto;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* ===== 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;
    }

    [data-anim] {
        opacity: 1 !important;
        transform: none !important;
    }

    .fade-in {
        opacity: 1 !important;
        transform: none !important;
    }

    .diagram-el {
        opacity: 1 !important;
    }

    .hero-content > * {
        opacity: 1 !important;
        transform: none !important;
    }

    .hero-visual {
        opacity: 1 !important;
        transform: none !important;
    }

    /* Disable SVG glow filters for performance */
    svg [filter] {
        filter: none !important;
    }
}