:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1a1f25;
  --muted: #5a636e;
  --border: #e1e5ea;
  --accent: #1d6b3a;
  --accent-text: #ffffff;
  --error: #b42318;
  --ok: #17794a;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1115;
    --surface: #161a20;
    --text: #e5e8ec;
    --muted: #97a0ab;
    --border: #272d35;
    --accent: #6fcf8f;
    --accent-text: #0e1115;
    --error: #ff8a80;
    --ok: #5fd39a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main, footer {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px;
}

main { padding-top: clamp(40px, 9vw, 88px); }

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

.hero {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 48px;
}

.mark {
  flex: none;
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--border);
}

h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.headline {
  margin: 6px 0 18px;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}

.button:hover { border-color: var(--accent); }

.button.solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.button.solid:hover { filter: brightness(1.08); }
.button:disabled { opacity: 0.6; cursor: default; }

section { margin-bottom: 48px; }

.label {
  margin: 0 0 14px;
  font: 500 13px/1 var(--mono);
  color: var(--muted);
  text-transform: lowercase;
}

.label::before { content: "// "; color: var(--accent); }

section > p { margin: 0 0 12px; }

.projects {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}

details + details { border-top: 1px solid var(--border); }

summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker { display: none; }

summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font: 18px/1 var(--mono);
  color: var(--muted);
}

details[open] summary::after { content: "−"; }
summary:hover strong { color: var(--accent); }

.icon {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--border);
}

.title { display: flex; flex-direction: column; min-width: 0; }
.title strong { font-weight: 600; }
.title span { color: var(--muted); font-size: 15px; }

.more {
  padding: 0 16px 16px 74px;
  font-size: 15px;
}

.more p { margin: 0 0 10px; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font: 13px/1.5 var(--mono);
  color: var(--muted);
}

form { display: grid; gap: 14px; }

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
}

input, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 400;
}

textarea { resize: vertical; min-height: 120px; }

input:focus, textarea:focus, summary:focus-visible, a:focus-visible, .button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
}

#status { margin: 0; font-size: 15px; }
#status.error { color: var(--error); }
#status.ok { color: var(--ok); }

footer {
  padding-top: 8px;
  padding-bottom: 40px;
}

footer p {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font: 13px/1.5 var(--mono);
  color: var(--muted);
}

@media (max-width: 520px) {
  .hero { flex-direction: column; gap: 16px; }
  .row { grid-template-columns: 1fr; }
  .more { padding-left: 16px; }
}