:root {
  color-scheme: dark;
  --bg: #0e0e12;
  --panel: #17171c;
  --border: #2c2c34;
  --text: #d4d4dc;
  --muted: #8a8a96;
  --accent: #ffcc44;
  --ok: #7ee08a;
  --err: #ff7a6b;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif; font-size: 15px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
header .brand { font-weight: 600; color: var(--text); letter-spacing: .02em; }
header .brand span { color: var(--accent); }
header nav { display: flex; gap: 14px; font-size: 14px; }

main.center { display: grid; place-items: center; padding: 40px 16px; }
.card {
  width: 100%; max-width: 380px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 12px; padding: 24px;
}
.card h1 { font-size: 20px; font-weight: 600; margin: 0 0 18px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
input {
  width: 100%; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 15px;
}
input:focus { outline: none; border-color: var(--accent); }
.hint { font-size: 12px; min-height: 16px; margin-top: 4px; color: var(--muted); }
.hint.ok { color: var(--ok); }
.hint.err { color: var(--err); }
button {
  width: 100%; margin-top: 20px; padding: 10px; border: 0; border-radius: 8px;
  background: var(--accent); color: #141418; font-weight: 600; font-size: 15px; cursor: pointer;
}
button:disabled { opacity: .5; cursor: default; }
button.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.msg { margin-top: 14px; font-size: 14px; min-height: 18px; }
.msg.err { color: var(--err); }
.alt { margin-top: 16px; font-size: 14px; color: var(--muted); text-align: center; }

.hero { min-height: calc(100vh - 60px); display: grid; place-items: center; text-align: center; padding: 16px; }
.hero h1 { font-weight: 600; letter-spacing: .02em; margin: 0 0 .4em; font-size: 32px; }
.hero h1 span { color: var(--accent); }
.hero p { color: var(--muted); margin: 0; }