:root {
  --bg: #0b0f17;
  --panel: #111827;
  --panel-2: #0f1522;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #3b82f6;
  --accent-2: #a855f7;
  --error: #f87171;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(900px 500px at 10% -10%, rgb(59 130 246 / 0.18), transparent 60%),
    radial-gradient(700px 500px at 110% 10%, rgb(168 85 247 / 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: inherit; }
code { font-family: var(--mono); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1160px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 16px;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo { display: block; width: 36px; height: 36px; box-shadow: 0 6px 18px rgb(139 92 246 / 0.35); border-radius: 10px; }
.wordmark { font-size: 21px; font-weight: 800; letter-spacing: -0.035em; color: #fff; }
.wordmark .dim { color: var(--muted); font-weight: 600; }
.nav-link {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
}
.nav-link:hover { border-color: #374151; background: var(--panel); }

.hero {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
  max-width: 1160px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(38px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead { margin: 0 0 32px; color: var(--muted); font-size: 19px; max-width: 540px; }
.domain {
  font-family: var(--mono);
  font-size: 0.9em;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap;
}
.domain .base { color: var(--muted); }

.features { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; font-size: 17px; }
.features li::before { content: "✓"; color: #34d399; margin-right: 12px; font-weight: 700; }

.auth {
  position: sticky;
  top: 24px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgb(17 24 39 / 0.8);
  backdrop-filter: blur(8px);
}
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  margin-bottom: 20px;
  border-radius: 10px;
  background: var(--bg);
}
.tabs button {
  padding: 9px;
  border: 0;
  border-radius: 7px;
  background: none;
  color: var(--muted);
  font: 600 14px inherit;
  font-family: inherit;
  cursor: pointer;
}
.tabs button[aria-selected="true"] { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgb(0 0 0 / 0.4); }

.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; }
.form input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: 15px inherit;
  font-family: inherit;
}
.form input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.hint { margin: -6px 0 0; font-size: 13px; color: var(--muted); }
.hint strong { color: var(--text); font: 13px var(--mono); word-break: break-all; }
.error { margin: 0; min-height: 0; color: var(--error); font-size: 14px; }
.error:empty { display: none; }

.primary {
  padding: 12px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #fff;
  font: 600 15px inherit;
  font-family: inherit;
  cursor: pointer;
}
.primary:hover { filter: brightness(1.1); }
.primary:disabled { opacity: 0.6; cursor: progress; }

.foot { padding: 24px 16px; text-align: center; color: #6b7280; font-size: 13px; }

@media (max-width: 880px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 8px; }
  .auth { position: static; }
}