/* ---------- Colour tokens: change these and the whole site restyles ---------- */
:root {
  color-scheme: dark;

  --bg: #0b0d12;                      /* shows while the image loads */
  --surface: rgba(14, 17, 24, 0.55);  /* translucent panels over the photo */
  --text: #eceef4;
  --muted: #a4abbb;
  --border: rgba(255, 255, 255, 0.14);
  --accent: #9db0ff;

  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "Fira Code", Consolas, monospace;

  --space: 1rem;
  --radius: 8px;
  --max-width: 44rem;
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  /* dark gradient on top keeps text readable; image underneath */
  background-image:
    linear-gradient(to bottom, rgba(8, 10, 15, 0.55), rgba(8, 10, 15, 0.8)),
    url("wallpaper.jpg");
  background-size: cover;
  background-position: center bottom;
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--space) * 1.25);
}

h1, h2, h3 {
  line-height: 1.2;
  font-family: var(--font-mono);
  font-weight: 600;
}

h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); margin: 0 0 var(--space); }
h2 { font-size: 1.3rem; margin: 3rem 0 var(--space); }
h3 { font-size: 1.05rem; margin: 0 0 0.25rem; }

p { margin: 0 0 var(--space); }

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Layout pieces ---------- */
.site-header {
  padding: calc(var(--space) * 1.5) 0;
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space);
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav ul {
  display: flex;
  gap: calc(var(--space) * 1.25);
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }

.hero { padding: 4rem 0 1rem; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 36rem; }

/* ---------- Project grid ---------- */
.projects {
  display: grid;
  gap: var(--space);
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  list-style: none;
  padding: 0;
  margin: 0;
}

.card {
  display: block;
  height: 100%;
  padding: var(--space) calc(var(--space) * 1.25);
  background: var(--surface);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.15s;
}

.card:hover,
.card:focus-visible { border-color: var(--accent); }

.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.tags {
  margin-top: 0.75rem !important;
  font-family: var(--font-mono);
  font-size: 0.8rem !important;
}

/* ---------- Project page ---------- */
.back { display: inline-block; margin: 2rem 0 0; font-size: 0.95rem; }
.meta { color: var(--muted); font-family: var(--font-mono); font-size: 0.9rem; }

pre {
  overflow-x: auto;
  padding: var(--space);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

img { max-width: 100%; height: auto; border-radius: var(--radius); }


/* ---------- Inline code, keys, lists ---------- */
code, kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}
pre code { padding: 0; border: 0; background: none; }
article ul { padding-left: 1.25rem; margin: 0 0 var(--space); }
article li { margin-bottom: 0.35rem; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 5rem;
  padding: calc(var(--space) * 1.5) 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}