/* ============================================================
   ui-auth.css — "Paper & Ink" sign-in surfaces
   Boards: docs/design/paper-ink/Auth-SignIn.dc.html (modal, two states)
           docs/design/paper-ink/Auth-Confirm.dc.html (magic-link confirm page,
           server-rendered by packages/api/src/render/authConfirmPage.ts)
   Also styles the passkey offer modal and the passkey manager modal.

   Loaded after ui-tokens.css + ui-base.css. Every colour/font goes through the
   --pa-* aliases below, which read the shared --ui-* tokens from ui-tokens.css
   (so dark mode follows the shared palette) and fall back to the SPEC light
   hexes only if ui-tokens.css failed to load. Nothing else in this file
   hard-codes a colour.
   ============================================================ */

.pa-auth-modal,
.pa-confirm-page,
.pa-pk-modal {
  --pa-paper: var(--ui-paper, #F6F5F1);
  --pa-surface: var(--ui-surface, #FFFFFF);
  --pa-sunken: var(--ui-sunken, #EFEEE8);
  --pa-ink: var(--ui-ink, #14201B);
  --pa-ink-2: var(--ui-ink-2, #3D4944);
  --pa-ink-3: var(--ui-ink-3, #5E6A65);
  --pa-line: var(--ui-line, #E4E2DA);
  --pa-line-strong: var(--ui-line-strong, #CFCCC2);
  --pa-accent: var(--ui-accent, #1B7F4B);
  --pa-accent-hover: var(--ui-accent-hover, #146A3E);
  --pa-accent-soft: var(--ui-accent-soft, #E4F2E9);
  --pa-accent-ink: var(--ui-accent-ink, #0E5A32);
  --pa-red: var(--ui-red, #B42318);
  --pa-red-soft: var(--ui-red-soft, #FCEBE9);
  --pa-on-accent: var(--ui-on-accent, #FFFFFF);
  --pa-font-display: var(--ui-serif, 'Instrument Serif', Georgia, serif);
  --pa-font-ui: var(--ui-sans, 'Geist', system-ui, sans-serif);
  --pa-font-mono: var(--ui-mono, 'Geist Mono', ui-monospace, monospace);
  --pa-shadow-overlay: var(--ui-shadow-overlay, 0 16px 40px rgba(20, 32, 27, .14));
  font-family: var(--pa-font-ui);
  color: var(--pa-ink);
}

/* ---------- shared primitives (scoped to the auth surfaces) ---------- */

.pa-btn {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font: 500 15px/1 var(--pa-font-ui);
  text-decoration: none;
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease;
}
.pa-btn:focus-visible,
.pa-icon-btn:focus-visible,
.pa-link-btn:focus-visible,
.pa-confirm a:focus-visible {
  outline: 2px solid var(--pa-accent);
  outline-offset: 2px;
}
.pa-btn:disabled { cursor: not-allowed; opacity: .6; }
.pa-btn-primary { background: var(--pa-accent); color: var(--pa-on-accent); }
.pa-btn-primary:hover:not(:disabled) { background: var(--pa-accent-hover); }
.pa-btn-secondary { background: var(--pa-surface); border-color: var(--pa-line-strong); color: var(--pa-ink); }
.pa-btn-secondary:hover:not(:disabled) { background: var(--pa-sunken); }
.pa-btn-ghost { background: transparent; color: var(--pa-ink-2); }
.pa-btn-ghost:hover:not(:disabled) { background: var(--pa-sunken); color: var(--pa-ink); }
.pa-btn-lg { height: 48px; font-size: 16px; }
.pa-btn-sm { width: auto; height: 36px; padding: 0 14px; font-size: 14px; }
.pa-btn svg { flex: none; }

.pa-icon-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--pa-ink-2);
  cursor: pointer;
}
.pa-icon-btn:hover { background: var(--pa-sunken); color: var(--pa-ink); }

.pa-link-btn {
  padding: 0;
  border: 0;
  background: none;
  font: 500 14px var(--pa-font-ui);
  color: var(--pa-accent);
  cursor: pointer;
}
.pa-link-btn:hover:not(:disabled) { color: var(--pa-accent-hover); text-decoration: underline; text-underline-offset: 3px; }
.pa-link-btn:disabled { color: var(--pa-ink-3); cursor: default; }

.pa-eyebrow {
  font: 500 12px var(--pa-font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--pa-accent-ink);
}

.pa-sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.pa-avatar {
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 999px;
  background: var(--pa-accent-soft);
  color: var(--pa-accent-ink);
  font: 600 13px var(--pa-font-ui);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- sign-in modal (#authModal) ---------- */

.overlay .modal.pa-auth-modal,
.overlay .modal.pa-pk-modal {
  position: relative;
  box-sizing: border-box;
  width: min(480px, calc(100vw - 32px));
  max-width: 480px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding: 32px;
  border: 0;
  border-radius: 16px;
  background: var(--pa-surface);
  box-shadow: var(--pa-shadow-overlay);
  text-align: left;
}

.pa-auth-close {
  position: absolute;
  top: 16px;
  right: 16px;
}

.pa-auth-step {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.pa-auth-step[hidden] { display: none; }

.pa-auth-mark { display: block; width: 36px; height: 36px; }

.pa-auth-head { display: flex; flex-direction: column; gap: 6px; padding-right: 32px; }

.pa-auth-title {
  margin: 0;
  font: 400 30px/1.1 var(--pa-font-display);
  letter-spacing: -0.01em;
  color: var(--pa-ink);
}
.pa-auth-title:focus { outline: none; }

.pa-auth-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--pa-ink-2);
}
.pa-auth-sub strong { font-weight: 600; color: var(--pa-ink); overflow-wrap: anywhere; }

.pa-field { display: flex; flex-direction: column; gap: 6px; }

.pa-label { font-size: 14px; font-weight: 500; color: var(--pa-ink); }

.pa-input {
  box-sizing: border-box;
  width: 100%;
  height: 44px;
  margin: 0;
  padding: 0 14px;
  border: 1px solid var(--pa-line-strong);
  border-radius: 10px;
  background: var(--pa-surface);
  font: 400 15px var(--pa-font-ui);
  color: var(--pa-ink);
}
.pa-input::placeholder { color: var(--pa-ink-3); }
.pa-input:focus {
  outline: none;
  border-color: var(--pa-accent);
  box-shadow: 0 0 0 3px var(--pa-accent-soft);
}
.pa-input[aria-invalid="true"] { border-color: var(--pa-red); }

/* Errors: a red dot + text, never a red slab (SPEC toasts/errors rule). */
.pa-auth-error {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: -6px 0 0;
  font-size: 14px;
  line-height: 1.45;
  color: var(--pa-red);
}
.pa-auth-error::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--pa-red);
  transform: translateY(-2px);
}

.pa-auth-or {
  display: flex;
  align-items: center;
  gap: 12px;
  font: 500 12px var(--pa-font-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--pa-ink-3);
}
.pa-auth-or::before,
.pa-auth-or::after {
  content: "";
  flex-grow: 1;
  height: 1px;
  background: var(--pa-line);
}
.pa-auth-or[hidden] { display: none; }

.pa-auth-legal,
.pa-auth-fine {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--pa-ink-3);
}
.pa-auth-legal a,
.pa-confirm a {
  color: var(--pa-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.pa-auth-legal a:hover,
.pa-confirm a:hover { color: var(--pa-accent-hover); }

/* State 2 — "Check your email" */
.pa-auth-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--pa-accent-soft);
  color: var(--pa-accent-ink);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pa-auth-note {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--pa-sunken);
  font-size: 14px;
  line-height: 1.45;
  color: var(--pa-ink-2);
}
.pa-auth-note svg { flex: none; }

.pa-auth-resend-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  font-size: 14px;
  color: var(--pa-ink-3);
}
.pa-auth-resend-row .pa-link-btn { font-variant-numeric: tabular-nums; }

/* Passkey offer modal (#passkeyOfferModal) + manager (#passkeysModal). */
.pa-pk-actions { display: flex; flex-direction: column; gap: 10px; }
.pa-pk-modal .rd-pk-list { display: flex; flex-direction: column; gap: 8px; }
.pa-pk-modal .rd-pk-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--pa-line);
  border-radius: 12px;
  background: var(--pa-surface);
}
.pa-pk-modal .rd-pk-meta { font-size: 14px; color: var(--pa-ink-2); }
.pa-pk-modal .rd-pk-actions { display: flex; gap: 8px; flex: none; }
.pa-pk-modal .rd-pk-empty {
  padding: 14px;
  border-radius: 10px;
  background: var(--pa-sunken);
  font-size: 14px;
  color: var(--pa-ink-2);
}

@media (max-width: 480px) {
  .overlay .modal.pa-auth-modal,
  .overlay .modal.pa-pk-modal { padding: 24px 20px; }
  .pa-auth-title { font-size: 26px; }
}

/* ---------- magic-link confirm page (server-rendered) ---------- */

body.pa-confirm-page {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--pa-paper);
}

/* Static header shown until/unless partials.js mounts the shared one. */
.pa-fallback-header {
  height: 64px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  padding: 0 32px;
  background: var(--pa-surface);
  border-bottom: 1px solid var(--pa-line);
}
.pa-fallback-header a.pa-logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.pa-confirm {
  flex-grow: 1;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 64px 16px;
}

.pa-confirm-card {
  box-sizing: border-box;
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 36px;
  border: 1px solid var(--pa-line);
  border-radius: 16px;
  background: var(--pa-surface);
  box-shadow: 0 16px 40px rgba(20, 32, 27, .08);
}

.pa-confirm-title {
  margin: 0;
  font: 400 40px/1.05 var(--pa-font-display);
  letter-spacing: -0.01em;
  color: var(--pa-ink);
}

.pa-confirm-who {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--pa-line);
  border-radius: 10px;
  background: var(--pa-paper);
  min-width: 0;
}
.pa-confirm-who-text { display: flex; flex-direction: column; min-width: 0; }
.pa-confirm-who-label { font-size: 13px; color: var(--pa-ink-3); }
.pa-confirm-who-email {
  font-size: 15px;
  font-weight: 600;
  color: var(--pa-ink);
  overflow-wrap: anywhere;
}

.pa-confirm-form { margin: 0; }

.pa-confirm-why {
  display: flex;
  gap: 10px;
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--pa-ink-2);
}
.pa-confirm-why svg { flex: none; margin-top: 2px; color: var(--pa-ink-3); }

.pa-confirm-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--pa-ink-3);
}
.pa-confirm a.pa-muted-link { color: var(--pa-ink-3); }
.pa-confirm a.pa-muted-link:hover { color: var(--pa-ink); }

@media (max-width: 480px) {
  .pa-confirm { padding: 32px 16px 48px; justify-content: flex-start; }
  .pa-confirm-card { padding: 24px 20px; }
  .pa-confirm-title { font-size: 34px; }
  .pa-fallback-header { padding: 0 16px; }
}

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