:root { --bg: #000; --fg: #fff; --muted: #8a8a8a; --line: #2a2a2a; --error: #ff6b6b; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; }
.card { width: 100%; max-width: 380px; }
.brand { display: flex; flex-direction: column; gap: 4px; margin-bottom: 32px; }
.logo { width: 180px; height: auto; align-self: flex-start; }
.wordmark { font-weight: 800; font-size: 22px; letter-spacing: .12em; }
.tagline { color: var(--muted); font-size: 13px; letter-spacing: .04em; }
h1 { font-size: 20px; font-weight: 600; margin: 0 0 20px; }
form { display: flex; flex-direction: column; gap: 14px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input { font: inherit; color: var(--fg); background: transparent; border: 1px solid var(--line);
  border-radius: 6px; padding: 10px 12px; }
input:focus { outline: none; border-color: var(--fg); }
button { font: inherit; font-weight: 600; cursor: pointer; padding: 10px 14px; border-radius: 6px;
  border: 1px solid var(--fg); background: var(--fg); color: var(--bg); }
button.secondary { background: transparent; color: var(--fg); align-self: flex-start; }
button:hover { opacity: .85; }
.error { color: var(--error); margin: 0 0 12px; }
.muted { color: var(--muted); }