:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #eef6f5;
    --text: #172026;
    --muted: #5d6b76;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --accent: #f59e0b;
    --border: #d8e2e7;
    --shadow: 0 22px 60px rgba(15, 23, 42, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

.hero {
    min-height: 92vh;
    display: flex;
    flex-direction: column;
    background:
        linear-gradient(120deg, rgba(11, 37, 51, 0.92), rgba(15, 118, 110, 0.82)),
        url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80");
    background-position: center;
    background-size: cover;
    color: #ffffff;
}

.topbar {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    font-weight: 800;
    text-decoration: none;
    font-size: 1.05rem;
}

.nav-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus {
    color: #ffffff;
}

.hero-content {
    width: min(1120px, calc(100% - 40px));
    margin: auto;
    padding: 80px 0 120px;
}

.eyebrow {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.hero h1 {
    max-width: 860px;
    font-size: clamp(2.4rem, 6vw, 5.2rem);
    line-height: 1.02;
    margin-bottom: 24px;
}

.hero-text {
    max-width: 720px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.18rem;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 20px;
    border-radius: 8px;
    font-weight: 800;
    text-decoration: none;
}

.button.primary {
    background: var(--accent);
    color: #241504;
}

.button.secondary {
    border: 1px solid rgba(255, 255, 255, 0.55);
    color: #ffffff;
}

.section {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 82px 0;
}

.section.muted {
    width: 100%;
    background: var(--surface-soft);
    padding-left: max(20px, calc((100% - 1120px) / 2));
    padding-right: max(20px, calc((100% - 1120px) / 2));
}

.section-heading {
    max-width: 680px;
    margin-bottom: 30px;
}

.section-heading h2,
.footer h2 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.12;
}

.about-grid,
.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.panel,
.project-card,
.timeline-item,
.experience-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

.panel {
    padding: 26px;
}

.panel h3,
.project-card h3,
.timeline-item h3,
.experience-item h3 {
    color: var(--primary-dark);
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.panel p,
.project-card p,
.timeline-item p,
.experience-item li,
.footer p {
    color: var(--muted);
}

.timeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.timeline-item {
    padding: 24px;
}

.timeline-item span,
.project-type,
.role {
    color: var(--primary);
    display: block;
    font-size: 0.9rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    list-style: none;
}

.skills-list li {
    background: #ffffff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    font-weight: 800;
    padding: 14px;
}

.project-card {
    min-height: 310px;
    padding: 26px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 22px;
}

.project-card.featured {
    background: #0b2533;
    border-color: #0b2533;
    color: #ffffff;
}

.project-card.featured h3,
.project-card.featured p {
    color: #ffffff;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.tags li {
    background: rgba(15, 118, 110, 0.12);
    border: 1px solid rgba(15, 118, 110, 0.18);
    border-radius: 999px;
    color: var(--primary-dark);
    font-size: 0.85rem;
    font-weight: 800;
    padding: 6px 10px;
}

.featured .tags li {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.22);
    color: #ffffff;
}

.experience-list {
    display: grid;
    gap: 18px;
}

.experience-item {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    padding: 28px;
}

.experience-item ul {
    padding-left: 18px;
}

.experience-item li + li {
    margin-top: 8px;
}

.footer {
    background: #0b2533;
    color: #ffffff;
    padding: 70px max(20px, calc((100% - 1120px) / 2));
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 36px;
}

.footer p {
    max-width: 540px;
    color: rgba(255, 255, 255, 0.78);
}

.contact-list {
    display: grid;
    gap: 12px;
    font-style: normal;
}

.contact-list a {
    color: #ffffff;
    font-weight: 800;
    text-decoration: none;
}

.contact-list a:hover,
.contact-list a:focus {
    color: var(--accent);
}

@media (max-width: 820px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .hero {
        min-height: auto;
    }

    .hero-content {
        padding: 66px 0 86px;
    }

    .about-grid,
    .project-grid,
    .timeline,
    .experience-item,
    .footer {
        grid-template-columns: 1fr;
    }

    .footer {
        display: grid;
    }
}

@media (max-width: 520px) {
    .topbar,
    .hero-content,
    .section {
        width: min(100% - 28px, 1120px);
    }

    .nav-links {
        gap: 10px 14px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .button {
        width: 100%;
    }

    .section,
    .section.muted {
        padding-top: 58px;
        padding-bottom: 58px;
    }

    .panel,
    .project-card,
    .timeline-item,
    .experience-item {
        padding: 22px;
    }
}