/*
 * Login, invitation registration, first setup and the account page (PROPOSAL §3.2).
 * Compact single-column account forms; desktop login pairs the form with a decorative scene.
 * Colours, font stacks and type sizes come only from the custom
 * properties in /static/tokens.css (loaded first), so a new visual direction changes the tokens and
 * never this file. The only literal sizes are layout and the 16px field floor that stops phones
 * zooming in; every button and link is at least one control (44px) tall.
 */
:root {
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
body {
  margin: 0;
  min-width: 280px;
  background: var(--gd-paper);
  color: var(--gd-ink);
  font-family: var(--gd-font-body);
  font-size: var(--gd-type-body);
  line-height: var(--gd-leading-body);
  font-synthesis: none;
  overflow-wrap: anywhere;
}
button,
input {
  font: inherit;
  color: inherit;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
button:disabled,
button[aria-disabled='true'] {
  cursor: default;
}
:focus-visible {
  outline: var(--gd-stroke-strong) solid var(--gd-focus);
  outline-offset: 2px;
}

/* Account forms retain the compact layout; only desktop login uses two columns. */
.access-page {
  width: min(440px, 100%);
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: var(--gd-space-6) var(--gd-space-4);
  display: grid;
  align-content: center;
  gap: var(--gd-space-5);
}
.access-brand-block {
  display: grid;
  gap: var(--gd-space-1);
}
.access-brand {
  justify-self: start;
  min-height: var(--gd-control);
  display: inline-flex;
  align-items: center;
  color: var(--gd-ink);
  text-decoration: none;
}
.access-brand strong {
  font-size: var(--gd-type-number);
  font-weight: 700;
  line-height: 1;
}
.access-card {
  min-width: 0;
  padding: var(--gd-space-6);
  background: var(--gd-card);
  border: var(--gd-stroke) solid var(--gd-rule);
  border-radius: var(--gd-radius-l);
  box-shadow: var(--gd-shadow-card);
}
.access-scene {
  display: none;
  pointer-events: none;
  user-select: none;
}
@media (min-width: 900px) {
  body[data-mode='login'] .access-page {
    width: min(1180px, 100%);
    grid-template-columns: minmax(0, 3fr) minmax(340px, 2fr);
    grid-template-rows: auto auto;
    column-gap: clamp(32px, 4vw, 64px);
    row-gap: var(--gd-space-5);
    padding: var(--gd-space-section) var(--gd-space-6);
  }
  body[data-mode='login'] .access-brand-block,
  body[data-mode='login'] .access-card {
    grid-column: 2;
    justify-self: center;
    width: 100%;
    max-width: 400px;
  }
  body[data-mode='login'] .access-brand-block { grid-row: 1; }
  body[data-mode='login'] .access-card { grid-row: 2; }
  body[data-mode='login'] .access-scene {
    display: block;
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: center;
    justify-self: center;
    width: 100%;
    max-width: 640px;
    height: 440px;
    margin-top: 48px;
  }
}
.card-heading {
  margin-bottom: var(--gd-space-5);
}
.card-heading h1 {
  margin: 0;
  font-size: var(--gd-type-section);
  font-weight: 600;
  line-height: 1.4;
}
.card-heading p {
  margin: var(--gd-space-2) 0 0;
  color: var(--gd-note);
  font-size: var(--gd-type-caption);
}

/* “登录后会直接打开：…” (a chat link, written by the gateway) or “登录后会回到：…” (only a page name). */
.access-next,
.access-return {
  margin: 0 0 var(--gd-space-5);
  padding: var(--gd-space-2) var(--gd-space-3);
  background: var(--gd-blue-tint);
  color: var(--gd-blue-text);
  border-radius: var(--gd-radius-s);
  font-size: var(--gd-type-caption);
}

/* Fields */
.access-card form {
  margin: 0;
}
fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
  display: grid;
  gap: var(--gd-space-4);
}
.access-field {
  min-width: 0;
}
.access-field label {
  display: block;
  margin-bottom: var(--gd-space-2);
  color: var(--gd-label);
  font-size: var(--gd-type-label);
  font-weight: 600;
}
.access-field input {
  width: 100%;
  min-width: 0;
  min-height: calc(var(--gd-control) + 4px);
  padding: var(--gd-space-2) var(--gd-space-3);
  border: var(--gd-stroke) solid var(--gd-control-edge);
  border-radius: var(--gd-radius-m);
  background: var(--gd-card);
  color: var(--gd-ink);
  font-size: 16px;
}
.access-field input::placeholder {
  color: var(--gd-note);
}
.access-field input:focus {
  border-color: var(--gd-focus);
}
.access-field input[aria-invalid='true'] {
  border-color: var(--gd-error);
  box-shadow: inset 0 0 0 var(--gd-stroke) var(--gd-error);
}
#invitation-code {
  letter-spacing: 0.08em;
}
.password-control {
  position: relative;
  min-width: 0;
}
.password-control input {
  padding-right: 64px;
}
.password-toggle {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 56px;
  min-height: var(--gd-control);
  padding: 0 var(--gd-space-3);
  border: 0;
  border-radius: var(--gd-radius-s);
  background: transparent;
  color: var(--gd-blue);
  font-size: var(--gd-type-caption);
}
.password-toggle:hover {
  background: var(--gd-groove);
}
.field-hint {
  margin: var(--gd-space-1) 0 0;
  color: var(--gd-note);
  font-size: var(--gd-type-caption);
}
.invitation-scope-note {
  margin: var(--gd-space-4) 0 0;
  padding: var(--gd-space-3);
  background: var(--gd-groove);
  border-radius: var(--gd-radius-s);
  color: var(--gd-note);
  font-size: var(--gd-type-caption);
}

/* The button, then the one line under it: checking / cannot connect / wrong password / countdown. */
.access-primary {
  position: relative;
  width: 100%;
  min-height: var(--gd-control);
  margin-top: var(--gd-space-5);
  padding: var(--gd-space-2) var(--gd-space-4);
  border: var(--gd-stroke) solid var(--gd-blue);
  border-radius: var(--gd-radius-m);
  background: var(--gd-blue);
  color: var(--gd-card);
  font-weight: 600;
}
.access-primary:hover:not([aria-disabled='true']) {
  background: var(--gd-blue-hover);
  border-color: var(--gd-blue-hover);
}
.access-primary[aria-disabled='true'] {
  opacity: 0.55;
}
.access-primary[aria-busy='true']::after {
  content: '';
  position: absolute;
  right: var(--gd-space-4);
  top: calc(50% - 7px);
  width: 14px;
  height: 14px;
  border: 2px solid transparent;
  border-top-color: var(--gd-card);
  border-right-color: var(--gd-card);
  border-radius: 50%;
  animation: access-spin 0.8s linear infinite;
}
@keyframes access-spin {
  to {
    transform: rotate(360deg);
  }
}
.access-status {
  min-height: 1.2em;
  margin: var(--gd-space-2) 0 0;
  color: var(--gd-note);
  font-size: var(--gd-type-caption);
}
.access-status:empty {
  display: none;
}
.access-feedback {
  margin: var(--gd-space-2) 0 0;
  padding: var(--gd-space-2) var(--gd-space-3);
  background: var(--gd-error-tint);
  border-left: var(--gd-stroke-strong) solid var(--gd-error);
  color: var(--gd-error);
  font-size: var(--gd-type-caption);
}
.access-feedback[data-kind='success'] {
  background: var(--gd-blue-tint);
  border-left-color: var(--gd-blue);
  color: var(--gd-blue-text);
}
.access-feedback[data-kind='info'] {
  background: var(--gd-blue-tint);
  border-left-color: var(--gd-blue);
  color: var(--gd-blue-text);
}
.access-countdown {
  margin: var(--gd-space-2) 0 0;
  color: var(--gd-ink-soft);
  font-size: var(--gd-type-caption);
}
/* Read aloud only: the start and the end of a wait (the visible countdown is aria-live=off). */
.access-announce {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Links and text buttons: one control tall. */
.access-link {
  min-height: var(--gd-control);
  display: inline-flex;
  align-items: center;
  padding: 0 var(--gd-space-1);
  border: 0;
  background: none;
  color: var(--gd-blue);
  text-decoration: underline;
  text-decoration-color: var(--gd-link-line);
  text-underline-offset: 4px;
}
.access-link:hover {
  color: var(--gd-ink);
  text-decoration-color: currentColor;
}
.access-link:disabled {
  color: var(--gd-note);
}
.retry-link {
  margin-top: var(--gd-space-1);
}
.access-register {
  margin: var(--gd-space-3) 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0 var(--gd-space-1);
  color: var(--gd-note);
}
.login-link {
  margin-top: var(--gd-space-4);
}
.account-identity {
  display: flex;
  align-items: center;
  gap: var(--gd-space-3);
  margin: 0 0 var(--gd-space-5);
  padding: var(--gd-space-3);
  background: var(--gd-groove);
  border-radius: var(--gd-radius-s);
}
.account-avatar {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gd-card);
  color: var(--gd-ink);
  font-weight: 600;
}
.account-identity > div {
  min-width: 0;
}
.account-identity div > span {
  display: block;
  color: var(--gd-note);
  font-size: var(--gd-type-small);
}
.account-identity strong {
  font-weight: 600;
}
.account-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--gd-space-3);
  margin-top: var(--gd-space-5);
  padding-top: var(--gd-space-3);
  border-top: var(--gd-stroke) solid var(--gd-rule);
}

.access-footnote {
  margin: var(--gd-space-4) 0 0;
  color: var(--gd-note);
  font-size: var(--gd-type-caption);
  text-align: center;
}

/* Phones: the card loses its frame padding, never the 16px field floor or the 44px targets. */
@media (max-width: 480px) {
  .access-page {
    align-content: start;
    padding-top: var(--gd-space-5);
  }
  .access-card {
    padding: var(--gd-space-5) var(--gd-space-4);
  }
}
/* 2.4.2 A7: phones do not zoom into fields, and every link or button is a 44px target. */
@media (max-width: 680px) {
  input,
  select,
  textarea {
    font-size: 16px;
  }
  .access-link {
    min-height: 44px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}