:root { --bg: #f6f5fb; --panel: #fff; --text: #1d1a2e; --muted: #5f5a78; --line: #dcd8ea; --accent: #b8336a; --bad: #b3261e; color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #14121f; --panel: #1d1a2c; --text: #eeebfa; --muted: #a59fc4; --line: #322d4b; --accent: #ff6fa5; --bad: #ff8a80; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; padding: 16px; }
form { width: min(360px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 24px; display: grid; gap: 14px; }
h1 { margin: 0 0 4px; font-size: 22px; }
label { display: grid; gap: 4px; color: var(--muted); font-size: 14px; }
input { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; }
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; font-weight: 700; color: #fff; background: var(--accent); border: 0; border-radius: 10px; padding: 10px 14px; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
#error { margin: 0; color: var(--bad); font-size: 14px; }