/* ---------- Theme ---------- */
:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --accent: #500000;        /* maroon */
  --accent-soft: #f3e6e6;
  --border: #e3e3e0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --max: 1040px;
}
[data-theme="dark"] {
  --bg: #121214;
  --surface: #1c1c1f;
  --text: #ececee;
  --muted: #a0a0a8;
  --accent: #e39a9a;
  --accent-soft: #3a2324;
  --border: #2c2c31;
  --shadow: 0 1px 3px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 .5rem; }
h2 { font-size: 1.6rem; margin-top: 2.5rem; }
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
main { flex: 1; padding: 2.5rem 0 3rem; }
.muted { color: var(--muted); }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex; align-items: center; gap: 1rem; height: 64px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; margin-right: auto; }
.nav { display: flex; gap: .25rem; }
.nav a {
  color: var(--muted); text-decoration: none; padding: .45rem .8rem; border-radius: 8px; font-weight: 500;
}
.nav a:hover { color: var(--text); background: var(--accent-soft); }
.nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.icon-btn {
  display: inline-grid; place-items: center;
  background: none; border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; width: 40px; height: 40px; cursor: pointer; font-size: 1.1rem;
}
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .nav-toggle { display: inline-grid; }
  .nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; background: var(--surface);
    border-bottom: 1px solid var(--border); padding: .5rem 1.25rem 1rem;
  }
  .nav.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero { display: grid; grid-template-columns: 1fr auto; gap: 2.5rem; align-items: center; padding: 1.5rem 0 1rem; }
.hero .avatar { width: 200px; height: 200px; border-radius: 50%; box-shadow: var(--shadow); }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 60ch; }
.btn {
  display: inline-block; padding: .7rem 1.2rem; border-radius: 10px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--accent); margin: .25rem .5rem .25rem 0; cursor: pointer;
  font: inherit; font-weight: 600;
}
.btn-primary { background: var(--accent); color: var(--surface); }
.btn-outline { color: var(--accent); background: transparent; }
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero .avatar { margin: 0 auto; width: 150px; height: 150px; order: -1; }
  .lead { margin-left: auto; margin-right: auto; }
}

/* ---------- Cards ---------- */
.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem; box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card img.icon { width: 64px; height: 64px; margin-bottom: .75rem; }
.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .75rem; }
.tag { font-size: .8rem; background: var(--accent-soft); color: var(--accent); padding: .15rem .6rem; border-radius: 999px; }

/* ---------- Project filter ---------- */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0 1.5rem; }
.filter-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: .4rem .9rem; border-radius: 999px; cursor: pointer; font: inherit;
}
.filter-btn.active { background: var(--accent); color: var(--surface); border-color: var(--accent); }
.card.hidden { display: none; }

/* ---------- Details (hobbies) ---------- */
details { margin-top: .75rem; }
summary { cursor: pointer; color: var(--accent); font-weight: 600; }

/* ---------- Forms ---------- */
form { display: grid; gap: 1rem; max-width: 560px; }
label { font-weight: 600; display: grid; gap: .35rem; }
input, textarea {
  font: inherit; padding: .7rem .8rem; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.error { color: #c62828; font-size: .9rem; font-weight: 500; min-height: 1.2em; }
.status { font-weight: 600; }

/* ---------- 404 ---------- */
.not-found { text-align: center; padding: 3rem 0; }
.not-found .code { font-size: clamp(4rem, 15vw, 8rem); font-weight: 800; color: var(--accent); margin: 0; }
code { background: var(--accent-soft); padding: .1rem .4rem; border-radius: 6px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0; color: var(--muted); font-size: .9rem; }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }