:root {
  color-scheme: light dark;
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #6c6c70;
  --line: #d1d1d6;
  --accent: #0a60ff;
  --accent-text: #ffffff;
  --danger: #d70015;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f2f2f7;
    --muted: #98989f;
    --line: #38383a;
    --accent: #4d94ff;
    --accent-text: #000000;
    --danger: #ff6961;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.4 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
h1, h2, h3, p { margin: 0; }
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

.auth {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.auth__box { width: min(380px, 100%); }
.auth h1 { font-size: 34px; line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; }
.auth__lead { margin-top: 8px; color: var(--muted); }

.group { margin-top: 28px; background: var(--card); border-radius: var(--radius); overflow: hidden; }
.group label { display: flex; align-items: center; gap: 12px; padding: 0 16px; min-height: 52px; }
.group label + label { border-top: 1px solid var(--line); }
.group label span { flex: none; width: 76px; color: var(--muted); font-size: 15px; }
.group input {
  flex: 1; min-width: 0; height: 52px; padding: 0;
  border: 0; background: transparent; color: var(--text);
  font: inherit; font-size: 17px;
}
.group input:focus-visible { outline: none; }
.group:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }

.error { margin-top: 14px; min-height: 1.4em; color: var(--danger); font-size: 15px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 50px; padding: 0 20px;
  border: 0; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-text);
  font: 600 17px/1 inherit; font-family: inherit; cursor: pointer;
  transition: opacity 0.15s, transform 0.12s;
}
.btn:active { transform: scale(0.98); }
.btn[disabled] { opacity: 0.5; cursor: default; }
.btn--block { width: 100%; margin-top: 8px; }
.btn--plain { background: transparent; color: var(--accent); }
.btn--danger { background: transparent; color: var(--danger); }
.btn--small { min-height: 34px; padding: 0 12px; font-size: 15px; border-radius: 8px; }
.btn--tint { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }

.auth__foot { margin-top: 28px; font-size: 15px; color: var(--muted); text-align: center; }

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:active { transform: none; }
}