/* Sign-in (email step, then code step). A centred column, 16px side margins, max 420px; nothing may be wider than the card. */
.signin { overflow-x: hidden; }
.signin main { width: 100%; max-width: 452px; margin: 0 auto; padding: max(6vh, 24px) 16px 32px; box-sizing: border-box; }
.hero { text-align: center; margin-bottom: 18px; }
.hero img { width: 80px; height: 80px; border-radius: 18px; display: block; margin: 0 auto; }
.hero h1 { margin: 10px 0 2px; font-size: 26px; line-height: 1.2; }
.hero .foot { margin-top: 4px; }
#app { width: 100%; min-width: 0; }
.card { width: 100%; box-sizing: border-box; background: var(--card); border: 1px solid var(--line); border-radius: var(--s-r, 14px); padding: 18px 16px;
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.card > * { min-width: 0; }
.card h2 { margin: 0; font-size: 19px; line-height: 1.25; }
.card p { margin: 0; color: var(--mut); font-size: 14px; line-height: 1.45; overflow-wrap: anywhere; }
.card p b { color: var(--fg); }
.card label { display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; font-size: 14px; color: var(--mut); }
.card input, .card button { width: 100%; min-width: 0; max-width: 100%; box-sizing: border-box; margin: 0; font: inherit; }
.card input { font-size: 17px; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: var(--s-r-btn, 10px); padding: 12px; min-height: 48px; }
.card input:focus { outline: 2px solid var(--tool, #f5c518); outline-offset: 1px; border-color: transparent; }
.card input.codebox { font-size: 26px; letter-spacing: .35em; text-indent: .35em; text-align: center; font-variant-numeric: tabular-nums; padding: 10px 8px; }
.card button { color: var(--fg); background: var(--card2); border: 1px solid var(--line); border-radius: var(--s-r-btn, 10px); padding: 12px; min-height: 48px; cursor: pointer; font-size: 16px; }
.card button.primary { font-weight: 600; }
.card button:disabled { opacity: .5; }
.card .row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.card .row button { padding: 8px 6px; min-height: 44px; font-size: 14px; line-height: 1.2; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: #3a1c1c; color: #ffd7d7; border: 1px solid #a33; padding: 10px 14px; border-radius: 12px; width: max-content; max-width: calc(100vw - 32px); box-sizing: border-box; }
.toast.ok { background: #183325; color: #c9f2d9; border-color: #2c6b47; }
.card p.next { color: var(--fg); background: var(--card2); border-radius: var(--s-r-btn, 10px); padding: 8px 10px; }
.card p.notreg { color: #ffd7d7; background: #3a1c1c; border: 1px solid #a33; border-radius: var(--s-r-btn, 10px); padding: 10px 12px; }
.card p.hint { font-size: 13px; }