:root {
    --bg: rgb(20,20,20);
    --text: rgb(243,243,243);
    --text-light: rgb(190,190,190);
    --border: rgb(69,69,69);
    --link: #0066cc;
    --link-hover: #004080;
    --accent: #0066cc;
    --dot-size: 16px;
    text-decoration: none;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
    line-height: 1.6;
}

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

/* Nav */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgb(31,31,31);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 28px;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--link);
}

.hamburger {
    display: none;
    flex-direction: column;
    width: 32px;
    height: 26px;
    background: none;
    border: none;
    cursor: pointer;
    justify-content: space-between;
    padding: 0;
}

.hamburger span {
    width: 100%;
    height: 4px;
    background: var(--text);
    border-radius: 2px;
    display: block;
    transition: all 0.35s ease;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    gap: 32px;
    text-align: center;
}

.mobile-menu a {
    color: var(--text);
    font-size: 1.6rem;
    font-weight: 600;
    text-decoration: none;
}

.mobile-menu a:hover {
    color: var(--link);
}

.close-menu {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    font-size: 3rem;
    color: var(--text);
    cursor: pointer;
}

/* Hero */
.hero {
    padding: 140px 0 80px;
}

.hero h1 {
    font-size: clamp(3.5rem, 8vw, 5.8rem);
    font-weight: 800;
    line-height: 0.95;
    margin-bottom: 16px;
}

.hero-sub {
    font-size: 1.4rem;
    color: var(--text-light);
    margin-bottom: 6px;
}

.degree-line {
    font-size: clamp(0.70rem, 3.0vw, 0.95rem);
    letter-spacing: 0.2px;
    line-height: 1.25;
    word-spacing: 1px;
    color: var(--text);
    font-weight: 500;
    margin-top: 4px;
    max-width: 95%;
    display: block;
    padding: 0;
}

.hero-bio {
    font-size: 1.15rem;
    max-width: 720px;
    margin: 32px 0;
    color: var(--text-light);
}

.section {
    padding: 80px 0;
}

.section-label {
    font-size: 0.9rem;
    color: var(--text-light);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 40px;
    font-weight: 500;
}

/* Skills */
.group-heading {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 40px 0 20px;
}

.skills-compact {
    max-width: 900px;
    margin: 0 auto;
}

.skills-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 16px 32px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.skills-row:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.compact-label {
    font-size: 1.15rem;
    font-weight: 600;
    min-width: 160px;
    flex-shrink: 0;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
}

.skill-tag {
    font-size: 0.92rem;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 30px;
    background: rgb(31,31,31);
    color: var(--text);
}

/* Projects */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.bento-item {
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    background: rgb(31,31,31);
}

.bento-img {
    width: 100%;
    height: 240px;
    object-fit: cover;
}

.bento-overlay {
    padding: 20px;
}

.pills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 8px;
    margin-top: 12px;
    margin-bottom: 12px;
}

.pill {
    font-size: 0.78rem;
    padding: 5px 11px;
    background: var(--bg);
    border-radius: 20px;
    border: 1px solid var(--border);
    white-space: nowrap;
}

.bento-overlay h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.bento-overlay p {
    font-size: 0.98rem;
    color: var(--text-light);
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--border);
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.exp-item,
.publication-link .exp-item {
    display: flex;
    align-items: center;
    margin: 70px 0;
    position: relative;
}

.exp-item:nth-child(even) {
    flex-direction: row-reverse;
}

.exp-content {
    width: 45%;
    background: rgb(31,31,31);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 28px;
}

.exp-content,
.exp-content * {
    text-decoration: none !important;
}

.exp-content a {
    color: var(--link);
    text-decoration: none !important;
    border-bottom: none !important;
}

.exp-content a:hover,
.exp-content a:focus {
    text-decoration: underline !important;
    color: var(--link-hover);
}

.exp-content:hover {
    border-color: var(--accent);
}

.exp-date {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 14px;
}

.exp-dot {
    width: var(--dot-size);
    height: var(--dot-size);
    background: var(--accent);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    border: 4px solid white;
    box-shadow: 0 0 0 5px rgba(0, 102, 204, 0.12);
}

.cert-preview {
    margin: 0 0 36px 0 !important;
}

.cert-image {
    width: 100%;
    max-width: 420px;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: block;
}

/* About page */
.about-section {
    min-height: 80vh;
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.about-text {
    padding: 0 40px;
}

.about-text p {
    font-size: 1.05rem;
    margin-bottom: 1.8em;
    color: var(--text);
}

.about-photo {
    padding: 0 40px;
}

.about-image {
    width: 100%;
    max-width: 420px;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: block;
}

/* Footer */
footer {
    padding: 80px 0 40px;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid var(--border);
}

.social-links a {
    color: var(--text-light);
    font-size: 1.8rem;
    margin: 0 20px;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--link);
}

/* Mobile / Tablet adjustments */
@media (max-width: 1000px) {
    .container {
        padding: 0 20px;
    }

    .hamburger {
        display: flex;
    }

    .desktop-nav {
        display: none;
    }

    .hero {
        padding: 110px 0 50px;
    }

    .hero h1 {
        font-size: clamp(2.4rem, 9vw, 4.0rem);
    }

    .hero-sub {
        font-size: clamp(0.84rem, 2.6vw, 0.92rem);
    }

    .degree-line {
        font-size: clamp(0.56rem, 2.5vw, 0.68rem);
        line-height: 1.28;
        letter-spacing: 0.1px;
        margin-top: 6px;
        padding: 0;
    }

    .hero-bio {
        font-size: clamp(0.90rem, 3.0vw, 0.96rem);
        margin: 24px 0;
    }

    .section-label {
        font-size: 0.78rem;
    }

    .group-heading {
        font-size: 1.2rem;
    }

    .compact-label {
        font-size: 1rem;
    }

    .skill-tag {
        font-size: 0.80rem;
        padding: 4px 10px;
    }

    .bento-overlay h3 {
        font-size: 1.2rem;
    }

    .bento-overlay p {
        font-size: 0.88rem;
    }

    .exp-content {
        padding: 20px 14px;
        font-size: 0.92rem;
    }

    .exp-date {
        font-size: 0.85rem;
    }

    .about-text p {
        font-size: 0.85rem;
    }

    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 56px;
    }

    .about-text {
        padding: 0 40px;
        text-align: left !important;
    }

    .about-photo {
        padding: 0 40px;
    }

    .about-image {
        max-width: 300px;
        margin: 0 auto;
        margin-top: -50px;
    }

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

    .skills-row {
        flex-direction: column;
        gap: 12px;
    }

    .compact-label {
        min-width: auto;
    }

    .timeline::before {
        display: none;
    }

    .exp-item,
    .exp-item:nth-child(even) {
        flex-direction: column;
        align-items: stretch;
        margin: 56px 0;
    }

    .exp-content {
        width: 100%;
        padding: 28px 20px;
    }

    .exp-dot {
        display: none;
    }

    .cert-preview {
        margin-bottom: 32px !important;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 90px 0 40px;
    }

    .hero h1 {
        font-size: clamp(2.2rem, 10vw, 3.6rem);
    }

    .hero-sub {
        font-size: clamp(0.72rem, 3vw, 0.80rem);
        line-height: 1.32;
    }

    .degree-line {
        font-size: clamp(0.52rem, 2.9vw, 0.62rem);
        line-height: 1.25;
        letter-spacing: 0.02px;
        word-spacing: 0.3px;
        margin-top: 5px;
        padding: 0;
    }

    .hero-bio {
        font-size: clamp(0.86rem, 3.4vw, 0.92rem);
        margin: 20px 0;
    }

    .section {
        padding: 50px 0;
    }

    .skill-tag {
        font-size: 0.75rem;
        padding: 4px 8px;
    }

    .bento-overlay p {
        font-size: 0.84rem;
    }

    .about-text {
        padding: 0 36px;
    }

    .about-photo {
        padding: 0 28px;
    }
}

/* Link fixes */
.timeline a,
.timeline a:link,
.timeline a:visited,
.cert-item-link,
.cert-item-link a,
.cert-item-link a:link,
.cert-item-link a:visited,
.publication-link,
.publication-link a,
.publication-link a:link,
.publication-link a:visited {
    color: var(--text) !important;
    text-decoration: none !important;
    border-bottom: none !important;
    background: none !important;
    cursor: pointer;
}

.timeline a:hover,
.timeline a:focus,
.cert-item-link a:hover,
.cert-item-link a:focus,
.publication-link a:hover,
.publication-link a:focus {
    color: var(--link) !important;
    text-decoration: none !important;
}

.timeline a:visited,
.cert-item-link a:visited,
.publication-link a:visited {
    color: var(--text) !important;
}

@media (min-width: 1001px) {
    .exp-item.cert-item {
        gap: 60px;
    }
}