:root {
  --bg: #0b0f14;
  --panel: #121923;
  --border: #1f2a37;
  --text: #d6e1ee;
  --muted: #8aa0b6;
  --accent: #3ddc97;
  --accent-ink: #04140c;
  --danger: #ff6b6b;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8fa; --panel: #ffffff; --border: #d8e0e8; --text: #1b2733;
    --muted: #5a6b7d; --accent: #0a8f5b; --accent-ink: #ffffff; --danger: #c62828;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 var(--sans);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.nav {
  position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between;
  align-items: center; padding: 14px max(20px, 6vw);
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { font: 600 15px var(--mono); color: var(--text); }
.cursor { color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.nav nav { display: flex; gap: 22px; }
.nav nav a { color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--text); text-decoration: none; }

main { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.hero { padding: 14vh 0 10vh; }
.prompt { font: 400 14px var(--mono); color: var(--accent); margin: 0 0 8px; }
h1 { font-size: clamp(2.6rem, 8vw, 4.5rem); line-height: 1.05; margin: 0 0 8px; letter-spacing: -0.02em; }
.role { font: 600 1.1rem var(--mono); color: var(--accent); margin: 0 0 18px; }
.lead { max-width: 56ch; color: var(--muted); font-size: 1.15rem; margin: 0 0 28px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); background: transparent; color: var(--text);
  font: 600 14px var(--sans);
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn[disabled] { opacity: .6; cursor: progress; }

.section { padding: 56px 0; border-top: 1px solid var(--border); }
h2 { font-size: 1.6rem; margin: 0 0 22px; }
h2 span { font: 400 .9rem var(--mono); color: var(--accent); margin-right: 10px; }
.facts { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 6px; }
.facts b { display: inline-block; min-width: 100px; font: 600 13px var(--mono); color: var(--muted); }

.grid { display: grid; gap: 16px; }
.skills { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.projects { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px;
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: .95rem; }
.card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font: 400 12px var(--mono); padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted);
}
.muted { color: var(--muted); }

form { display: grid; gap: 16px; max-width: 640px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr; } .nav nav { gap: 14px; } }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
input, textarea {
  width: 100%; padding: 11px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text); font: 400 15px var(--sans);
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
.err { color: var(--danger); font-weight: 400; min-height: 1em; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.status { margin: 0; min-height: 1.5em; font-size: 14px; }
.status.ok { color: var(--accent); }
.status.fail { color: var(--danger); }

.hero.auth { padding: 12vh 0 8vh; }
.hero.auth form { margin-top: 24px; max-width: 420px; }

#content-json { font: 400 13px var(--mono); line-height: 1.5; min-height: 320px; resize: vertical; white-space: pre; }
h2 .count { font: 400 .9rem var(--mono); color: var(--muted); margin-left: 6px; }
#messages-list { grid-template-columns: 1fr; }
.msg .msg-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.msg .msg-email { font: 400 13px var(--mono); }
.msg .msg-date { font: 400 12px var(--mono); margin: 0 0 10px; }
.msg p:not(.msg-date) { white-space: pre-wrap; }
.msg .msg-del { margin-top: 14px; padding: 6px 14px; font-size: 13px; }
.msg .msg-del:hover { border-color: var(--danger); color: var(--danger); }

.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 40px 20px; border-top: 1px solid var(--border); }
.footer a.admin-link { color: var(--muted); font: 400 12px var(--mono); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .card { transition: none; }
}