/* Reset & base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    font-family: system-ui, sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
}
body {
    background: #fafafa;
    color: #222;
    max-width: 960px;
    margin: auto;
    padding: 1rem;
}

/* Header / Hero */
.hero {
    text-align: center;
    padding: 3rem 0;
    background: #004e92;
    color: #fff;
}
.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}
.hero .tagline {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    margin-top: 0.5rem;
    background: #ffb400;
    color: #000;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.2s;
}
.btn:hover {
    background: #ffa000;
}

/* Sections */
section {
    margin: 3rem 0;
}
h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 0.3rem;
    margin-bottom: 1.5rem;
}

/* Projects grid */
.grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.card img {
    width: 100%;
    height: auto;
    display: block;
}
.card h3 {
    margin: 1rem;
    font-size: 1.2rem;
}
.card .summary {
    margin: 0 1rem 0.5rem;
    color: #555;
}
.card .tech {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0 1rem 1rem;
}
.card .tech li {
    background: #f0f0f0;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.85rem;
}
.card .btn {
    margin: 0 1rem 1rem;
}

/* Footer */
footer {
    text-align: center;
    font-size: 0.85rem;
    color: #777;
    margin-top: 4rem;
}
footer a {
    color: inherit;
    text-decoration: underline;
    margin: 0 0.4rem;
}