:root {
    --bg: #0e0f11;
    --card: #14161a;
    --muted: #aab1bd;
    --text: #e9eef6;
    --accent: #4fd1c5;
    --accent-2: #8ab4f8;
    --ring: rgba(79, 209, 197, 0.5);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans",
        "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
    line-height: 1.6;
}

a {
    color: #0bf;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Images */
section img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem auto;
    border: 1px solid #444;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}
figure {
    margin: 1.5rem 0;
    text-align: center;
}
figcaption {
    font-size: 0.875rem;
    color: #aaa;
    margin-top: 0.5rem;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.top-nav {
    display: flex;
    gap: 1rem;
    background: #222;
    padding: 1rem;
}
.top-nav a {
    color: #eee;
}

.site-header {
    padding: 64px 0 40px;
    background: radial-gradient(1200px 600px at 10% -10%, rgba(79, 209, 197, 0.2), transparent 70%),
        radial-gradient(1200px 600px at 90% 0%, rgba(138, 180, 248, 0.12), transparent 70%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.project-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0 0 8px;
}

.subtitle {
    margin: 0 0 16px;
    color: var(--muted);
    font-style: italic;
    font-weight: 600;
}

.quick-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 0;
    margin: 0 0 20px;
    list-style: none;
    color: var(--muted);
}

.quick-facts li strong {
    color: var(--accent-2);
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #081018;
    font-weight: 700;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 999px;
    box-shadow: var(--shadow);
    transition: transform 0.08s ease, box-shadow 0.2s ease;
}
.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 40px rgba(79, 209, 197, 0.35);
}

.section {
    padding: 44px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

h2 {
    font-size: clamp(1.25rem, 2.2vw, 1.75rem);
    margin: 0 0 12px;
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
}
.media {
    grid-column: span 12;
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}
@media (min-width: 800px) {
    .media:nth-child(1) {
        grid-column: span 12;
    }
    .media:nth-child(2),
    .media:nth-child(3) {
        grid-column: span 6;
    }
}
.media video,
.media img {
    display: block;
    width: 100%;
    height: auto;
}
.media figcaption {
    padding: 10px 14px;
    color: var(--muted);
    font-size: 0.95rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.cards {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}
.card {
    grid-column: span 12;
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    padding: 18px 18px;
    box-shadow: var(--shadow);
}
@media (min-width: 860px) {
    .card {
        grid-column: span 4;
    }
}
.card h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
}
.card ul {
    margin: 0;
    padding-left: 18px;
}

.bullets {
    padding-left: 18px;
    margin: 0;
}

.detail {
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    margin: 12px 0;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.detail > summary {
    cursor: pointer;
    padding: 14px 16px;
    list-style: none;
    font-weight: 700;
    outline: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.detail > summary::-webkit-details-marker {
    display: none;
}
.detail[open] > summary {
    border-bottom-color: rgba(255, 255, 255, 0.12);
}
.detail-body {
    padding: 14px 16px;
}
.detail-body ul {
    margin: 0;
    padding-left: 18px;
}

.links a {
    display: inline-block;
    margin-right: 1rem;
    margin-top: 1rem;
    padding: 0.5rem 0.75rem;
    background: #0bf;
    color: #111;
    border-radius: 4px;
}
.links a:last-child {
    background: #444;
    color: #eee;
}

.codeblock {
    background: #0b0c0f;
    color: #e6edf3;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 16px;
    overflow: auto;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.9rem;
    box-shadow: var(--shadow);
}

.fineprint {
    color: var(--muted);
    font-size: 0.95rem;
}

/* PDF Embeds */
.pdf-container {
    margin: 2rem 0;
    border: 1px solid #444;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}
.pdf-container iframe,
.pdf-container embed {
    width: 100%;
    height: 600px; /* adjust height as needed */
    border: none;
}

footer {
    background: #222;
    padding: 1rem 0;
    margin-top: 2rem;
}
footer nav {
    text-align: center;
    gap: 1rem;
    display: flex;
    justify-content: center;
}
footer p {
    text-align: center;
    font-size: 0.875rem;
    color: #777;
    margin-top: 0.5rem;
}

/* Slightly different color for this project */
.site-header.smart-alarm {
    background: radial-gradient(1200px 600px at 10% -10%, rgba(255, 100, 100, 0.2), transparent 70%),
        radial-gradient(1200px 600px at 90% 0%, rgba(255, 200, 150, 0.12), transparent 70%);
}

.site-header.solar-weathering {
    background: radial-gradient(1200px 600px at 0% -10%, rgba(255, 200, 100, 0.2), transparent 70%),
        radial-gradient(1200px 600px at 100% 0%, rgba(255, 255, 180, 0.15), transparent 70%);
}

.site-header.robotics-car {
    background: radial-gradient(1200px 600px at 0% -10%, rgba(100, 180, 255, 0.18), transparent 70%),
        radial-gradient(1200px 600px at 100% 0%, rgba(180, 220, 255, 0.12), transparent 70%);
}