:root {
  --pi-ink: #16202E;
  --pi-ink-2: #2A3848;
  --pi-slate: #4A5663;
  --pi-muted: #6B7682;
  --pi-paper: #F7F4EC;
  --pi-surface: #FFFFFF;
  --pi-border: #E2DCCE;
  --pi-accent: #9A6B2F;
  --pi-accent-ink: #6E4C1F;
  --pi-accent-bg: #F2E9D8;
  --pi-flag: #8C4A3A;
  --pi-flag-bg: #F1E2DC;
  --pi-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--pi-sans);
  background: var(--pi-paper);
  color: var(--pi-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.card {
  width: 100%;
  max-width: 400px;
  background: var(--pi-surface);
  border: 1px solid var(--pi-border);
  border-radius: 12px;
  padding: 28px 26px 24px;
  box-shadow: 0 8px 28px rgba(22,32,46,0.08);
}
.kicker {
  font-size: 11px; font-weight: 800; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--pi-accent); margin: 0 0 8px;
}
h1 { font-size: 1.55rem; margin: 0 0 8px; font-weight: 750; }
.lead { font-size: 14px; color: var(--pi-slate); line-height: 1.5; margin: 0 0 22px; }
label { display: block; font-size: 12px; font-weight: 700; color: var(--pi-ink-2); margin: 0 0 6px; }
input {
  width: 100%; font: inherit; font-size: 15px;
  padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--pi-border); background: #fff; color: var(--pi-ink);
  margin-bottom: 14px;
}
input:focus { outline: 2px solid var(--pi-accent); outline-offset: 1px; }
button {
  width: 100%; font: inherit; font-size: 15px; font-weight: 700;
  padding: 11px 14px; border: none; border-radius: 8px;
  background: var(--pi-ink); color: #fff; cursor: pointer;
  margin-top: 4px;
}
button:hover { filter: brightness(1.06); }
button:disabled { opacity: 0.55; cursor: default; }
.err {
  display: none; background: var(--pi-flag-bg); color: var(--pi-flag);
  font-size: 13px; font-weight: 600; padding: 10px 12px; border-radius: 8px;
  margin-bottom: 14px; line-height: 1.4;
}
.err.show { display: block; }
.foot { margin-top: 18px; font-size: 12px; color: var(--pi-muted); line-height: 1.45; text-align: center; }