:root {
  --purple: #5f3698;
  --purple-dark: #4c2b79;
  --purple-light: #ece7f3;
  --dark: #1a1a2e;
  --bg: #f4f4f8;
  --white: #fff;
  --text: #1a1a2e;
  --text-light: #555;
  --max-w: 1000px;
  --shadow: 0 2px 8px rgba(0,0,0,.07);
  --radius: 8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--purple); }

/* ── Nav ─────────────────────────────────────── */
nav { background: var(--dark); padding: 0 20px; position: sticky; top: 0; z-index: 100; }
.nav-inner { max-width: var(--max-w); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 60px; }
nav .logo { display: flex; align-items: center; text-decoration: none; color: #fff; font-weight: 700; font-size: 1rem; gap: 10px; }
nav .logo img { height: 34px; width: auto; }
.nav-links { display: flex; list-style: none; gap: 4px; }
.nav-links a { color: rgba(255,255,255,.8); text-decoration: none; padding: 8px 13px; border-radius: 6px; font-size: .88rem; transition: background .15s, color .15s; }
.nav-links a:hover, .nav-links a.active { background: rgba(255,255,255,.12); color: #fff; }

.nav-toggle { display: none; }
.hamburger { display: none; flex-direction: column; cursor: pointer; gap: 5px; }
.hamburger span { width: 24px; height: 2px; background: #fff; border-radius: 2px; }

@media (max-width: 700px) {
  .hamburger { display: flex; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--dark); padding: 10px 20px 20px; }
  .nav-links a { display: block; padding: 12px 14px; border-radius: 0; }
  .nav-toggle:checked ~ .nav-links { display: flex; }
}

/* ── Main ────────────────────────────────────── */
main { flex: 1; max-width: var(--max-w); margin: 0 auto; padding: 40px 20px; width: 100%; }

/* ── Hero ────────────────────────────────────── */
.hero { text-align: center; padding: 60px 0 30px; }
.hero img { width: 140px; height: auto; margin-bottom: 20px; }
.hero h1 { font-size: 2rem; margin-bottom: 12px; }
.hero .tagline { font-size: 1.15rem; color: var(--text-light); max-width: 620px; margin: 0 auto; }

/* ── Cards ───────────────────────────────────── */
.card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px 32px; margin-bottom: 24px; }
.card h2 { color: var(--purple); font-size: 1.2rem; margin-bottom: 12px; }
.card h3 { font-size: 1rem; margin: 18px 0 8px; }
.card p, .card li { line-height: 1.7; margin-bottom: 8px; }
.card ul { padding-left: 22px; }

/* ── Hub grid (capability cards, etc.) ───────── */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin: 24px 0; }
.hub-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; text-decoration: none; color: var(--text); display: block; transition: box-shadow .15s, transform .15s; }
.hub-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); transform: translateY(-2px); }
.hub-card h3 { color: var(--purple); margin-bottom: 8px; font-size: 1.05rem; }
.hub-card p { font-size: .92rem; color: var(--text-light); line-height: 1.5; }

/* ── Project grid ────────────────────────────── */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.grid-item { background: #f8f7fa; padding: 18px; border-radius: 6px; }
.grid-item strong { color: var(--purple); }

.tech-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tech-tags span { background: var(--purple-light); color: var(--purple); font-size: .73rem; padding: 3px 8px; border-radius: 4px; font-weight: 600; }

/* ── CTA ─────────────────────────────────────── */
.cta { display: inline-block; background: var(--purple); color: #fff; padding: 12px 28px; border-radius: 6px; text-decoration: none; font-weight: 600; transition: background .15s; }
.cta:hover { background: var(--purple-dark); }
.cta-wrap { text-align: center; margin: 30px 0; }

/* ── Page header ─────────────────────────────── */
.page-header { margin-bottom: 28px; }
.page-header h1 { font-size: 1.8rem; margin-bottom: 8px; }
.page-header p { color: var(--text-light); font-size: 1.05rem; }

.breadcrumb { font-size: .85rem; margin-bottom: 14px; color: var(--text-light); }
.breadcrumb a { color: var(--purple); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ── Forms ────────────────────────────────────── */
.form-wrap { max-width: 500px; margin: 0 auto; }
form { display: flex; flex-direction: column; gap: 10px; }
input, textarea { font-family: inherit; font-size: 1rem; padding: 12px; border-radius: 6px; border: 1px solid #ccc; width: 100%; transition: border-color .15s; }
input:focus, textarea:focus { outline: none; border-color: var(--purple); }
textarea { min-height: 120px; resize: vertical; }
button[type="submit"] { padding: 12px; background: var(--purple); color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background .15s; }
button[type="submit"]:hover { background: var(--purple-dark); }

/* ── Footer ──────────────────────────────────── */
footer { background: var(--dark); color: rgba(255,255,255,.7); padding: 28px 20px; margin-top: auto; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 14px; }
.footer-links { display: flex; flex-wrap: wrap; list-style: none; gap: 14px; }
.footer-links a { color: rgba(255,255,255,.7); text-decoration: none; font-size: .85rem; transition: color .15s; }
.footer-links a:hover { color: #fff; }
footer .copy { font-size: .8rem; }

/* ── Home cards row ──────────────────────────── */
.home-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 10px 0 20px; }
@media (max-width: 700px) { .home-cards { grid-template-columns: 1fr; } }
.home-cards .hub-card { text-align: center; }
.home-cards .hub-card h3 { font-size: 1.1rem; }

/* ── About founder ───────────────────────────── */
.founder { display: flex; gap: 24px; align-items: flex-start; }
.founder-info { flex: 1; }
@media (max-width: 600px) { .founder { flex-direction: column; } }

/* ── Contact info ────────────────────────────── */
.contact-info { display: flex; gap: 40px; flex-wrap: wrap; margin: 24px 0; }
.contact-info div { flex: 1; min-width: 200px; }