/* Andre Collins — security portfolio. Plain CSS, no dependencies, no JS.
   System font stack (no external fonts) keeps CSP strict and attack surface minimal. */

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9198a1;
  --accent: #3fb950;
  --accent-dim: #238636;
  --link: #58a6ff;
  --maxw: 820px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header / nav */
header.site {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 8px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand span { color: var(--accent); }
nav a {
  color: var(--muted);
  margin-left: 18px;
  font-size: 0.95rem;
}
nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 56px 0 32px; }
.hero h1 { font-size: 2.1rem; margin: 0 0 8px; line-height: 1.2; }
.hero .tagline { color: var(--accent); font-weight: 600; margin: 0 0 20px; }
.hero p { color: var(--text); }

/* Sections */
section { padding: 28px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 1.4rem; margin: 0 0 14px; }
h3 { font-size: 1.1rem; margin: 22px 0 6px; }

.muted { color: var(--muted); }
.lead { font-size: 1.05rem; }

/* Cards / project list */
.cards { display: grid; gap: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
}
.card h3 { margin-top: 0; }
.card .tags { margin-top: 10px; }

/* Tags / pills */
.tag {
  display: inline-block;
  background: #21262d;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.8rem;
  margin: 0 6px 6px 0;
}
.status {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.8rem;
  font-weight: 600;
}
.status.done { background: rgba(63,185,80,0.15); color: var(--accent); border: 1px solid var(--accent-dim); }
.status.progress { background: rgba(210,153,34,0.15); color: #d29922; border: 1px solid #9e6a03; }
.status.planned { background: #21262d; color: var(--muted); border: 1px solid var(--border); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--accent-dim);
  color: #fff;
  padding: 9px 16px;
  border-radius: 6px;
  font-weight: 600;
  margin-top: 8px;
}
.btn:hover { background: var(--accent); text-decoration: none; }
.btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }

/* Writeup article */
article.writeup { padding: 40px 0; }
article.writeup h1 { font-size: 1.9rem; margin-bottom: 6px; }
article.writeup .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; }
article.writeup h2 { border-top: none; padding-top: 18px; }
article.writeup pre {
  background: #010409;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  overflow-x: auto;
  font-size: 0.9rem;
}
article.writeup code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
article.writeup blockquote {
  border-left: 3px solid var(--accent-dim);
  margin: 16px 0;
  padding: 4px 16px;
  color: var(--muted);
}

/* Footer */
footer.site {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 28px 0 48px;
  margin-top: 24px;
}
footer.site a { color: var(--muted); }

ul.clean { padding-left: 20px; }
ul.clean li { margin: 6px 0; }