:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f9;
    --bg-elevated: #ffffff;
    --bg-card: #ffffff;
    --accent: #c9700a;
    --accent-light: #e07d0f;
    --accent-dim: rgba(201, 112, 10, 0.08);
    --accent-glow: rgba(201, 112, 10, 0.25);
    --text-primary: #1a1a1b;
    --text-secondary: #52525b;
    --text-tertiary: #a1a1aa;
    --border-subtle: rgba(0, 0, 0, 0.06);
    --border-visible: rgba(0, 0, 0, 0.12);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

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

::selection {
    background: var(--accent);
    color: white;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Grid background - very subtle */
.bg-fixed-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.bg-spotlight {
    position: fixed;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 900px;
    height: 500px;
    background: radial-gradient(ellipse at center, var(--accent-dim) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.8;
}

/* ============================================
   NAVBAR
============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s var(--ease-out-expo);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.navbar.scrolled::before {
    opacity: 1;
}

.nav-content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.nav-links {
    display: flex;
    gap: 36px;
    align-items: center;
}

.nav-links li {
    display: flex;
    align-items: center;
}

.nav-links li a:not(.btn-primary) {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
    position: relative;
    padding: 4px 0;
}

.nav-links li a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s var(--ease-out-expo);
}

.nav-links li a:not(.btn-primary):hover {
    color: var(--text-primary);
}

.nav-links li a:not(.btn-primary):hover::after {
    width: 100%;
}

.nav-links .btn-primary {
    padding: 8px 18px;
    font-size: 0.8rem;
    margin-left: 8px;
}

.nav-links .btn-primary::after {
    display: none;
}

.hamburger {
    display: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

/* ============================================
   BUTTONS
============================================ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.01em;
    border: none;
    cursor: pointer;
    transition: all 0.25s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.01em;
    border: 1px solid var(--border-visible);
    cursor: pointer;
    transition: all 0.25s var(--ease-out-expo);
}

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

/* ============================================
   HERO SECTION
============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 0 100px;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 720px;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-visible);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 32px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: var(--shadow-lg);
}

.badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 7vw, 4.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--text-primary);
    white-space: nowrap;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 400;
}

.hero-value-prop {
    max-width: 600px;
    margin: 0 auto 24px;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--accent-dim), rgba(201, 112, 10, 0.02));
    border: 1px solid var(--accent-glow);
    border-radius: 8px;
    position: relative;
}

.hero-value-prop::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.hero-value-prop p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-weight: 500;
}

.hero-value-prop strong {
    color: var(--accent);
    font-weight: 600;
}

.summary {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-bottom: 28px;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-credentials {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 24px;
    margin-bottom: 32px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}

.hero-credentials span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.hero-credentials span i {
    color: var(--accent);
    font-size: 0.9rem;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.social-links {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.social-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all 0.3s var(--ease-out-expo);
    box-shadow: var(--shadow-sm);
}

.social-links a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   SECTIONS
============================================ */
.section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

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

.section-title {
    font-family: var(--font-display);
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 56px;
    text-align: center;
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--accent);
    margin: 16px auto 0;
    border-radius: 2px;
}

/* ============================================
   ABOUT
============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 56px;
    align-items: start;
    max-width: 880px;
    margin: 0 auto;
}

.about-image {
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 12px;
    right: -12px;
    bottom: -12px;
    border: 2px solid var(--accent);
    border-radius: 12px;
    z-index: -1;
    opacity: 0.3;
}

.about-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.about-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.85;
}

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

.highlight-link::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s var(--ease-out-expo);
}

.highlight-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Industry Expertise Note in Skills Section */
.industry-expertise-note {
    margin-top: 32px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent);
    border-radius: 8px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.industry-expertise-note i {
    color: var(--accent);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.industry-expertise-note strong {
    color: var(--text-primary);
    font-weight: 600;
}

.immigration-note {
    margin-top: 24px;
    padding: 16px 20px;
    background: var(--accent-dim);
    border-left: 3px solid var(--accent);
    border-radius: 0 8px 8px 0;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.immigration-note i {
    color: var(--accent);
    font-size: 1.1rem;
}

/* ============================================
   SKILLS
============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 28px;
    border-radius: 12px;
    transition: all 0.35s var(--ease-out-expo);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    border-radius: 12px 12px 0 0;
    opacity: 0;
    transition: opacity 0.35s ease;
}

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

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

.skill-icon {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
}

.skill-card h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.skill-card p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    line-height: 1.7;
}

/* ============================================
   EXPERIENCE TIMELINE
============================================ */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--border-visible) 15%, var(--border-visible) 85%, transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: 44px;
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--accent);
    z-index: 1;
}

.timeline-item:first-child::before {
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-dim);
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.timeline-content h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.timeline-content h4 {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-weight: 400;
    margin-bottom: 14px;
}

.timeline-content ul {
    list-style: none;
    padding-left: 0;
}

.timeline-content li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.7;
}

.timeline-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 5px;
    height: 1px;
    background: var(--text-tertiary);
}

.company-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    padding: 10px 16px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-glow);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    transition: all 0.25s var(--ease-out-expo);
}

.company-profile-link:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

/* ============================================
   PROJECTS
============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 28px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    transition: all 0.35s var(--ease-out-expo);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.project-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.project-date {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 14px;
    display: block;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.925rem;
    margin-bottom: 18px;
    flex-grow: 1;
    line-height: 1.7;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.tags span {
    background: var(--accent-dim);
    border: 1px solid var(--accent-glow);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.01em;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
}

.project-link:hover {
    gap: 10px;
}

.project-link i {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.project-link:hover i {
    transform: translateX(2px);
}

/* Patent Section */
.patent-section {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 36px;
    border-radius: 12px;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.patent-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
    border-radius: 12px 0 0 12px;
}

.patent-section h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.patent-section h3 i {
    color: var(--accent);
}

.patent-section ul {
    display: grid;
    gap: 10px;
}

.patent-section li {
    color: var(--text-secondary);
    font-size: 0.925rem;
    padding-left: 20px;
    position: relative;
}

.patent-section li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.patent-section li strong {
    color: var(--text-primary);
}

/* ============================================
   EDUCATION
============================================ */
.education-grid {
    display: grid;
    gap: 24px;
    max-width: 880px;
    margin: 0 auto;
}

.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 28px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.edu-card-featured {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 36px;
    align-items: center;
    border-color: var(--accent);
    border-width: 1px;
    position: relative;
    overflow: hidden;
}

.edu-card-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
}

.edu-content {
    position: relative;
    z-index: 1;
}

.edu-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.edu-card .degree {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.edu-card .date {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.edu-card .gpa {
    font-size: 0.925rem;
    color: var(--text-secondary);
}

.award {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    padding: 8px 14px;
    background: var(--accent-dim);
    border: 1px solid var(--accent);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
}

.award i {
    color: #f59e0b;
}

.award-image {
    position: relative;
    z-index: 1;
}

.award-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.award-caption {
    display: block;
    text-align: center;
    margin-top: 10px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.award-caption i {
    color: var(--accent);
    margin-right: 4px;
}

/* ============================================
   FOOTER
============================================ */
.footer {
    background: var(--bg-secondary);
    padding: 80px 0 40px;
    text-align: center;
    border-top: 1px solid var(--border-subtle);
    position: relative;
    z-index: 1;
}

.footer h2 {
    font-family: var(--font-display);
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.footer > .container > p {
    color: var(--text-tertiary);
    margin-bottom: 36px;
    font-size: 1rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.contact-item {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.925rem;
    color: var(--text-secondary);
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    transition: all 0.25s var(--ease-out-expo);
    box-shadow: var(--shadow-sm);
}

.contact-item i {
    color: var(--accent);
}

.contact-item:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-item-featured {
    background: var(--accent-dim);
    border-color: var(--accent);
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.contact-item-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.contact-item-featured:hover::before {
    left: 100%;
}

.contact-item-featured:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.contact-item-featured:hover i {
    color: white;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
}

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        text-align: center;
    }

    .about-image {
        max-width: 220px;
        margin: 0 auto;
    }

    .about-image::before {
        display: none;
    }

    .immigration-note {
        justify-content: center;
    }

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

    .award-image {
        order: -1;
        max-width: 280px;
        margin: 0 auto;
    }

    .edu-content {
        text-align: center;
    }

    .award {
        margin: 14px auto 0;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-subtle);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.4s var(--ease-out-expo);
        pointer-events: none;
        box-shadow: var(--shadow-md);
    }

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

    .hero h1 {
        font-size: clamp(1.5rem, 6vw, 2.75rem);
    }

    .tagline {
        font-size: 1.05rem;
    }

    .hero-value-prop {
        padding: 14px 18px;
    }

    .hero-value-prop p {
        font-size: 0.925rem;
    }

    .hero-credentials {
        padding: 14px 18px;
        gap: 10px 20px;
    }

    .hero-credentials span {
        font-size: 0.8rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .section {
        padding: 72px 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 40px;
    }

    .timeline {
        padding-left: 24px;
    }

    .timeline-item::before {
        left: -28px;
    }

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

    .patent-section {
        padding: 24px;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .contact-item {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 120px 0 72px;
    }

    .badge {
        font-size: 0.7rem;
        padding: 6px 12px;
    }

    .hero-credentials {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        padding: 16px;
    }

    .hero-credentials span {
        font-size: 0.8rem;
        white-space: normal;
        text-align: center;
    }

    .skill-card {
        padding: 22px;
    }

    .project-card {
        padding: 22px;
    }

    .edu-card {
        padding: 22px;
    }

    .industry-expertise-note {
        padding: 14px 16px;
        font-size: 0.85rem;
    }

    .industry-expertise-note i {
        font-size: 1rem;
    }
}

/* Scrolled navbar state */
@media (min-width: 769px) {
    .navbar.scrolled {
        padding: 14px 0;
    }
}