:root {
    --bg: #f4f8fb;
    --surface: #ffffff;
    --text: #1f2d3d;
    --muted: #5b6773;
    --primary: #0f766e;
    --primary-soft: #d9f3f0;
    --border: #dbe5ee;
    --shadow: 0 8px 24px rgba(13, 34, 60, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: radial-gradient(circle at 15% 10%, #e8f7f4 0%, var(--bg) 40%);
    color: var(--text);
    line-height: 1.6;
}

.hero {
    background: linear-gradient(120deg, #0f766e, #164e63);
    color: #fff;
    padding: 24px 20px 56px;
}

.hero.small {
    padding-bottom: 40px;
}

.top-nav {
    max-width: 1000px;
    margin: 0 auto 28px;
    display: flex;
    gap: 12px;
}

.top-nav a {
    color: #d6f7f2;
    text-decoration: none;
    border: 1px solid rgba(214, 247, 242, 0.4);
    padding: 7px 14px;
    border-radius: 999px;
    transition: 0.2s ease;
}

.top-nav a:hover,
.top-nav a.active {
    background: #d6f7f2;
    color: #114c5d;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
}

.label {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.78rem;
    opacity: 0.9;
}

h1 {
    margin: 4px 0 12px;
    font-size: clamp(2rem, 4vw, 2.7rem);
}

.summary {
    max-width: 760px;
}

.container {
    max-width: 1000px;
    margin: -24px auto 40px;
    padding: 0 20px;
    display: grid;
    gap: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    box-shadow: var(--shadow);
}

h2 {
    margin-top: 0;
    font-size: 1.35rem;
    color: #0f3b4b;
}

h3 {
    margin: 6px 0;
    font-size: 1.05rem;
}

.timeline-item + .timeline-item {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
}

.period {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.company {
    margin-top: 0;
    color: #214f61;
    font-weight: 600;
}

ul {
    margin: 8px 0 0;
    padding-left: 20px;
}

.chips {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.chips li {
    background: var(--primary-soft);
    color: #0f4f4a;
    border: 1px solid #bfe6e1;
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.9rem;
}

.certificate {
    margin-top: 14px;
    color: var(--muted);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}

.project-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px;
    background: #fbfeff;
}

.project-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--border);
}

.status {
    display: inline-block;
    margin-top: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #fff4cc;
    color: #6a5200;
    font-size: 0.85rem;
}

@media (max-width: 640px) {
    .hero {
        padding: 20px 14px 44px;
    }

    .container {
        padding: 0 14px;
    }

    .card {
        padding: 18px;
    }
}