:root {
  --bg: #F4F2EC; --card: #FFFFFF; --ink: #17191C; --muted: #5B5F66; --line: #E2DFD6;
  --accent: #1E4E5C; --accent-soft: #E3ECEE; --on-accent: #FFFFFF; --warn: #9A3412; --warn-soft: #FBEAE3;
  color-scheme: light;
}
/* Dark follows the device unless the reader picked a side (data-theme on <html>, set by the app's theme button). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #141517; --card: #1D1F23; --ink: #ECEAE4; --muted: #A3A6AC; --line: #33363C;
          --accent: #7FB3BF; --accent-soft: #22343A; --on-accent: #0F1416; --warn: #F0A47E; --warn-soft: #3A2620; color-scheme: dark; }
}
:root[data-theme="dark"] { --bg: #141517; --card: #1D1F23; --ink: #ECEAE4; --muted: #A3A6AC; --line: #33363C;
          --accent: #7FB3BF; --accent-soft: #22343A; --on-accent: #0F1416; --warn: #F0A47E; --warn-soft: #3A2620; color-scheme: dark; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--ink);
       font: 16px/1.5 'Atkinson Hyperlegible Next', system-ui, sans-serif; display: flex; flex-direction: column; }
header { height: 60px; display: flex; align-items: center; padding: 0 24px; background: #17191C; color: #F4F2EC; }
.brand { font-family: 'Atkinson Hyperlegible Next', system-ui, sans-serif; font-size: 23px; font-weight: 600; }
main { flex: 1; display: flex; align-items: flex-start; justify-content: center; padding: 56px 16px; }
.card { width: 100%; max-width: 440px; background: var(--card); border: 1px solid var(--line);
        border-radius: 12px; padding: 32px; display: flex; flex-direction: column; gap: 16px; }
h1 { margin: 0; font-family: 'Atkinson Hyperlegible Next', system-ui, sans-serif; font-size: 30px; font-weight: 600; line-height: 1.15; }
p { margin: 0; color: var(--muted); }
label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 500; }
input { height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 8px;
        background: var(--card); color: var(--ink); font: inherit; }
input:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { height: 46px; border: 0; border-radius: 8px; background: var(--accent); color: var(--on-accent);
         font: inherit; font-weight: 500; cursor: pointer; }
button[disabled] { opacity: .6; cursor: default; }
.error { display: none; padding: 10px 12px; border-radius: 8px; background: var(--warn-soft); color: var(--warn); font-size: 14px; }
.error.show { display: block; }
.hint { font-size: 13px; color: var(--muted); }
a { color: var(--accent); }

[hidden] { display: none !important; }