:root {
    --background: #071821;
    --background-soft: #0b222d;
    --surface: #102d39;
    --surface-light: #163b49;
    --text-primary: #f4f8fa;
    --text-secondary: #b7c7cf;
    --accent: #4fd1c5;
    --accent-strong: #2eb9ad;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.24);
    --radius-large: 24px;
    --radius-medium: 16px;
    --radius-small: 10px;
    --max-width: 1180px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(
            circle at top right,
            rgba(79, 209, 197, 0.12),
            transparent 28rem
        ),
        var(--background);
    color: var(--text-primary);
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.65;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

.container {
    width: min(calc(100% - 40px), var(--max-width));
    margin-inline: auto;
}

.section {
    padding: 110px 0;
}

.section-alternate {
    background: rgba(255, 255, 255, 0.025);
}

.section-heading {
    max-width: 760px;
    margin-bottom: 48px;
}

.section-heading h2 {
    margin-bottom: 18px;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.12;
}

.section-heading p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.section-label,
.eyebrow,
.project-category,
.certification-provider,
.timeline-date,
.profile-label {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.section-label,
.eyebrow {
    margin-bottom: 14px;
}

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    background: rgba(7, 24, 33, 0.88);
    backdrop-filter: blur(18px);
}

.navbar {
    display: flex;
    min-height: 78px;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 1px solid rgba(79, 209, 197, 0.45);
    border-radius: 50%;
    color: var(--accent);
    font-weight: 900;
    letter-spacing: 0.08em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.94rem;
    font-weight: 600;
    transition:
        color 0.2s ease,
        transform 0.2s ease;
}

.nav-links a::after {
    position: absolute;
    right: 0;
    bottom: -8px;
    left: 0;
    height: 2px;
    background: var(--accent);
    content: "";
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.2s ease;
}

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

.nav-links a:hover::after {
    transform: scaleX(1);
}

.hero {
    display: flex;
    min-height: calc(100vh - 78px);
    align-items: center;
    padding: 90px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
    align-items: center;
    gap: 72px;
}

.hero h1 {
    max-width: 820px;
    margin-bottom: 24px;
    font-size: clamp(3.1rem, 7vw, 6.4rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}

.hero h1 span {
    display: block;
    color: var(--accent);
}

.hero h2 {
    max-width: 780px;
    margin-bottom: 24px;
    color: var(--text-primary);
    font-size: clamp(1.4rem, 3vw, 2.25rem);
    font-weight: 650;
    line-height: 1.25;
}

.hero-description {
    max-width: 720px;
    color: var(--text-secondary);
    font-size: 1.08rem;
}

.hero-actions,
.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: 750;
    transition:
        transform 0.2s ease,
        background 0.2s ease,
        border-color 0.2s ease,
        color 0.2s ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    background: var(--accent);
    color: #062028;
}

.button-primary:hover {
    background: #79e2d9;
}

.button-secondary {
    border-color: rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.035);
    color: var(--text-primary);
}

.button-secondary:hover {
    border-color: rgba(79, 209, 197, 0.55);
    background: rgba(79, 209, 197, 0.08);
}

.hero-card {
    position: relative;
    overflow: hidden;
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.075),
            rgba(255, 255, 255, 0.025)
        ),
        var(--surface);
    box-shadow: var(--shadow);
}

.hero-card::before {
    position: absolute;
    top: -80px;
    right: -80px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(79, 209, 197, 0.12);
    content: "";
    filter: blur(8px);
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 34px;
    padding: 9px 13px;
    border: 1px solid rgba(79, 209, 197, 0.25);
    border-radius: 999px;
    background: rgba(79, 209, 197, 0.08);
    color: #bff5ef;
    font-size: 0.85rem;
    font-weight: 650;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 6px rgba(79, 209, 197, 0.1);
}

.profile-summary {
    display: grid;
    gap: 10px;
}

.profile-value {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-weight: 650;
}

.overview {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.career-highlights {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.career-highlight {
    position: relative;
    display: flex;
    min-height: 340px;
    flex-direction: column;
    overflow: hidden;
    padding: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.055),
            rgba(255, 255, 255, 0.015)
        ),
        var(--surface);
    transition:
        transform 0.25s ease,
        border-color 0.25s ease,
        background 0.25s ease;
}

.career-highlight:hover {
    border-color: rgba(79, 209, 197, 0.34);
    background:
        linear-gradient(
            145deg,
            rgba(79, 209, 197, 0.08),
            rgba(255, 255, 255, 0.018)
        ),
        var(--surface);
    transform: translateY(-5px);
}

.career-highlight::after {
    position: absolute;
    right: -55px;
    bottom: -75px;
    width: 190px;
    height: 190px;
    border-radius: 50%;
    background: rgba(79, 209, 197, 0.07);
    content: "";
    filter: blur(6px);
}

.highlight-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 38px;
}

.highlight-index {
    color: rgba(79, 209, 197, 0.55);
    font-size: 0.82rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.highlight-label {
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-align: right;
}

.highlight-value {
    display: block;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: clamp(3rem, 6vw, 5.2rem);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.05em;
}

.highlight-value-text {
    font-size: clamp(2.4rem, 5vw, 4rem);
}

.career-highlight h3 {
    margin-bottom: 16px;
    font-size: 1.55rem;
}

.career-highlight p {
    max-width: 560px;
    margin-bottom: 28px;
    color: var(--text-secondary);
}

.highlight-footer {
    position: relative;
    z-index: 1;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: #c6f5f0;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.035em;
}

.career-highlight-primary {
    background:
        linear-gradient(
            145deg,
            rgba(79, 209, 197, 0.11),
            rgba(255, 255, 255, 0.018)
        ),
        var(--surface);
}

.career-highlight-accent {
    border-color: rgba(79, 209, 197, 0.22);
}

@media (max-width: 820px) {
    .career-highlights {
        grid-template-columns: 1fr;
    }

    .career-highlight {
        min-height: auto;
    }
}

@media (max-width: 520px) {
    .career-highlight {
        padding: 26px;
    }

    .highlight-top {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
        margin-bottom: 28px;
    }

    .highlight-label {
        text-align: left;
    }
}

.metric-card {
    min-height: 170px;
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(255, 255, 255, 0.025);
}

.metric-card strong {
    display: block;
    margin-bottom: 18px;
    color: var(--accent);
    font-size: 2.3rem;
    line-height: 1;
}

.metric-card span {
    color: var(--text-secondary);
    font-weight: 600;
}

.projects-grid {
    display: grid;
    gap: 24px;
}

.project-card {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 30px;
    padding: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background: rgba(255, 255, 255, 0.025);
    transition:
        transform 0.25s ease,
        border-color 0.25s ease,
        background 0.25s ease;
}

.project-card:hover {
    border-color: rgba(79, 209, 197, 0.32);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-4px);
}

.project-number {
    color: rgba(79, 209, 197, 0.42);
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
}

.project-content h3 {
    margin: 10px 0 16px;
    font-size: clamp(1.45rem, 3vw, 2rem);
}

.project-content > p {
    max-width: 850px;
    color: var(--text-secondary);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 24px 0;
}

.tag-list li {
    padding: 8px 12px;
    border: 1px solid rgba(79, 209, 197, 0.2);
    border-radius: 999px;
    background: rgba(79, 209, 197, 0.06);
    color: #c6f5f0;
    font-size: 0.84rem;
    font-weight: 650;
}

.project-link {
    color: var(--accent);
    font-weight: 800;
}

.project-link:hover {
    text-decoration: underline;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.skill-group {
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
}

.skill-group h3 {
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.skill-group ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 22px;
}

.skill-group li {
    position: relative;
    padding-left: 18px;
    color: var(--text-secondary);
}

.skill-group li::before {
    position: absolute;
    top: 0.67em;
    left: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    content: "";
}

.timeline {
    position: relative;
    max-width: 880px;
    margin-left: 14px;
}

.timeline::before {
    position: absolute;
    top: 8px;
    bottom: 8px;
    left: 6px;
    width: 2px;
    background: rgba(79, 209, 197, 0.22);
    content: "";
}

.timeline-item {
    position: relative;
    padding: 0 0 48px 44px;
}

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

.timeline-marker {
    position: absolute;
    top: 7px;
    left: 0;
    width: 14px;
    height: 14px;
    border: 3px solid var(--background);
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 5px rgba(79, 209, 197, 0.12);
}

.timeline-content {
    padding: 26px 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: rgba(255, 255, 255, 0.025);
}

.timeline-content h3 {
    margin: 8px 0 12px;
    font-size: 1.35rem;
}

.timeline-content p:last-child {
    color: var(--text-secondary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.certification-card {
    min-height: 250px;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
}

.certification-card h3 {
    margin: 14px 0 16px;
    font-size: 1.25rem;
    line-height: 1.3;
}

.certification-card p:last-child {
    color: var(--text-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 70px;
}

.about-content {
    display: grid;
    gap: 22px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.contact {
    text-align: center;
}

.contact-content {
    max-width: 820px;
}

.contact h2 {
    margin-bottom: 18px;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.08;
}

.contact p:not(.section-label) {
    color: var(--text-secondary);
    font-size: 1.08rem;
}

.contact-actions {
    justify-content: center;
}

.footer {
    padding: 30px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 980px) {
    .nav-links {
        display: none;
    }

    .hero {
        min-height: auto;
    }

    .hero-content,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .hero-content {
        gap: 48px;
    }

    .hero-card {
        max-width: 650px;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (max-width: 720px) {
    .container {
        width: min(calc(100% - 28px), var(--max-width));
    }

    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 70px 0;
    }

    .hero h1 {
        font-size: clamp(3rem, 15vw, 4.6rem);
    }

    .hero-actions,
    .contact-actions {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

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

    .project-card {
        grid-template-columns: 1fr;
        padding: 26px;
    }

    .project-number {
        font-size: 2.2rem;
    }

    .skill-group ul {
        grid-template-columns: 1fr;
    }

    .about-grid {
        gap: 20px;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero-card,
    .metric-card,
    .project-card,
    .skill-group,
    .timeline-content,
    .certification-card {
        border-radius: 14px;
    }

    .timeline {
        margin-left: 4px;
    }

    .timeline-item {
        padding-left: 34px;
    }
}