@import url("./tokens.css");

* { box-sizing: border-box; }

html,
body {
  min-width: 20rem;
  min-height: 100%;
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body { min-height: var(--vp-viewport-height, 100dvh); }

button,
input,
textarea,
select { font: inherit; }

button { color: inherit; }

button,
a,
input,
textarea,
select { -webkit-tap-highlight-color: transparent; }

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: var(--rule-focus) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

button:disabled,
input:disabled,
textarea:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

button { border: 0; }

h1,
h2,
h3,
p { margin: 0; }

h1,
h2,
h3 {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-style: normal;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

svg {
  width: 1.35rem;
  height: 1.35rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

[hidden] { display: none !important; }

.app-shell {
  width: 100%;
  min-height: var(--vp-viewport-height, 100dvh);
}

.main {
  width: 100%;
  min-height: var(--vp-viewport-height, 100dvh);
  padding-block-end: calc(5.75rem + env(safe-area-inset-bottom));
}

.view {
  width: min(100%, 48rem);
  min-height: var(--vp-viewport-height, 100dvh);
  margin-inline: auto;
  padding-inline: max(var(--space-md), env(safe-area-inset-left), env(safe-area-inset-right));
}

.view--auth {
  display: grid;
  align-content: start;
  gap: var(--space-xl);
  padding-block-start: max(var(--space-xl), env(safe-area-inset-top));
  padding-block-end: var(--space-2xl);
}

.view--chat {
  height: var(--vp-viewport-height, 100dvh);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  overflow: clip;
  padding-block-end: 0;
}

.topbar {
  min-height: 4rem;
  display: grid;
  grid-template-columns: minmax(2.75rem, auto) minmax(0, 1fr) minmax(2.75rem, auto);
  align-items: center;
  gap: var(--space-xs);
  padding-block-start: env(safe-area-inset-top);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky);
}

.topbar__title {
  justify-self: center;
  font-size: var(--text-md);
  text-align: center;
}

.topbar__action,
.icon-button,
.text-button {
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding-inline: var(--space-sm);
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: transparent;
  color: var(--color-accent);
  font-weight: 700;
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.topbar__action:active,
.icon-button:active,
.text-button:active { transform: translateY(1px); }

.page-head {
  display: grid;
  gap: var(--space-sm);
  padding-block: var(--space-xl) var(--space-lg);
}

.page-head--compact { padding-block-end: var(--space-md); }

.page-head__row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.page-title {
  max-width: 13ch;
  font-size: var(--text-display);
}

.page-title--small { font-size: var(--text-2xl); }

.page-copy {
  max-width: 38rem;
  color: var(--color-ink-soft);
}

.brand {
  display: grid;
  gap: var(--space-md);
}

.brand__mark {
  width: 2.75rem;
  height: 2.75rem;
  border: var(--rule-thin) solid var(--color-accent);
  border-radius: 50%;
  position: relative;
}

.brand__mark::after {
  content: "";
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  width: 1rem;
  height: var(--rule-thin);
  transform: translate(-50%, -50%);
  background: var(--color-accent);
}

.brand__title { font-size: var(--text-display); }
.brand__copy { max-width: 34rem; color: var(--color-ink-soft); }

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2xs);
  padding: var(--space-2xs);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-paper-soft);
}

.segmented__button {
  min-height: 2.75rem;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  font-weight: 700;
  white-space: nowrap;
}

.segmented__button[aria-selected="true"] {
  background: var(--color-paper-raised);
  color: var(--color-ink);
  box-shadow: 0 1px 2px var(--color-shadow);
}

.form,
.form__section {
  display: grid;
  gap: var(--space-lg);
}

.form__section + .form__section {
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.field {
  display: grid;
  gap: var(--space-xs);
  min-width: 0;
}

.field__label {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 700;
}

.field__required::after {
  content: " 必填";
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 400;
}

.field__control {
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem var(--space-md);
  border: var(--rule-thin) solid var(--color-rule-strong);
  border-radius: var(--radius-md);
  outline: var(--rule-focus) solid transparent;
  outline-offset: var(--space-3xs);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  transition: background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out);
}

textarea.field__control {
  min-height: 7rem;
  line-height: 1.6;
  resize: vertical;
}

.field__control::placeholder { color: var(--color-muted); opacity: 1; }
.field__control:focus-visible { border-color: var(--color-focus); }
.field__control[aria-invalid="true"] { border-color: var(--color-error); background: var(--color-error-soft); }
.field__control[data-state="success"] { border-color: var(--color-success); background: var(--color-success-soft); }

.field__helper {
  min-height: 1.5em;
  color: var(--color-muted);
  font-size: var(--text-sm);
}
.field__helper--error { color: var(--color-error); }

.field__password-wrap { position: relative; }
.field__password-wrap .field__control { padding-inline-end: 5rem; }
.field__password-toggle {
  position: absolute;
  inset-inline-end: var(--space-xs);
  inset-block-start: 50%;
  min-width: 4rem;
  min-height: 2.75rem;
  transform: translateY(-50%);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 700;
  white-space: nowrap;
}

.check-row,
.switch-row {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-ink-soft);
}

.check-row input,
.switch-row input { width: 1.25rem; height: 1.25rem; accent-color: var(--color-accent); }

.button {
  min-height: 3rem;
  padding-inline: var(--space-lg);
  border: var(--rule-thin) solid transparent;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}
.button:active { transform: translateY(1px); }
.button--primary { background: var(--color-ink); color: var(--color-paper-raised); }
.button--accent { background: var(--color-accent); color: var(--color-accent-ink); }
.button--secondary { border-color: var(--color-rule-strong); background: var(--color-paper-raised); color: var(--color-ink); }
.button--danger { border-color: var(--color-error); background: var(--color-paper-raised); color: var(--color-error); }
.button--block { width: 100%; }
.button[data-loading="true"] { cursor: wait; }
.button[data-loading="true"]::before {
  content: "";
  width: 1rem;
  height: 1rem;
  border: var(--rule-focus) solid currentColor;
  border-inline-end-color: transparent;
  border-radius: 50%;
  animation: spin 850ms linear infinite;
}

.list {
  display: grid;
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.person-row {
  width: 100%;
  min-height: 5.75rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: transparent;
  text-align: start;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.person-row:active { transform: translateY(1px); }
.person-row__body { min-width: 0; display: grid; gap: var(--space-2xs); }
.person-row__name { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; }
.person-row__summary { overflow: hidden; color: var(--color-ink-soft); text-overflow: ellipsis; white-space: nowrap; }
.person-row__meta { display: flex; align-items: center; gap: var(--space-xs); color: var(--color-muted); font-size: var(--text-xs); }
.person-row__tail { display: grid; justify-items: end; gap: var(--space-xs); }
.person-row__time { color: var(--color-muted); font-size: var(--text-xs); font-variant-numeric: tabular-nums; }

.avatar {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--color-accent-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  box-shadow: 0 1px 2px var(--color-shadow);
}
.avatar--coral { background: var(--color-avatar-coral); }
.avatar--tea { background: var(--color-avatar-tea); }
.avatar--leaf { background: var(--color-avatar-leaf); }
.avatar--blue { background: var(--color-avatar-blue); }
.avatar--violet { background: var(--color-avatar-violet); }

.badge {
  min-width: 1.4rem;
  min-height: 1.4rem;
  padding-inline: var(--space-xs);
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-xs);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.empty {
  min-height: 28rem;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: var(--space-md);
  padding-block-end: var(--space-2xl);
}
.empty__title { max-width: 12ch; font-size: var(--text-2xl); }
.empty__copy { max-width: 32rem; color: var(--color-ink-soft); }

.skeleton-list { display: grid; gap: var(--space-sm); padding-block: var(--space-md); }
.skeleton {
  min-height: 5.5rem;
  border-radius: var(--radius-md);
  background: var(--color-paper-soft);
  opacity: 0.72;
  animation: breathe 1.4s var(--ease-in-out) infinite alternate;
}

.stepper { display: grid; gap: var(--space-md); }
.stepper__meta { display: flex; justify-content: space-between; color: var(--color-muted); font-size: var(--text-sm); }
.stepper__rule { height: var(--rule-focus); background: var(--color-rule); overflow: clip; }
.stepper__value { height: 100%; background: var(--color-accent); transform: scaleX(0.33333); transform-origin: left; }
.stepper__value[data-step="2"] { transform: scaleX(0.66667); }
.stepper__value[data-step="3"] { transform: scaleX(1); }

.choice-list { display: grid; gap: var(--space-sm); }
.choice {
  min-height: 4.75rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-raised);
  text-align: start;
}
.choice[aria-pressed="true"] { border-color: var(--color-accent); background: var(--color-accent-soft); color: var(--color-ink); }
.choice__title { font-weight: 700; }
.choice__copy { color: var(--color-muted); font-size: var(--text-sm); }
.choice__tick { color: var(--color-accent); font-weight: 700; }

.avatar-picker { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--space-xs); }
.avatar-choice {
  min-width: 0;
  min-height: 3.5rem;
  border: var(--rule-focus) solid transparent;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: transparent;
}
.avatar-choice[aria-pressed="true"] { border-color: var(--color-focus); background: var(--color-accent-soft); }

.form-actions { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-sm); padding-block: var(--space-md) var(--space-xl); }

.channel-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2xs);
  padding-block: var(--space-xs);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}
.channel-tab {
  min-height: 2.75rem;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-weight: 700;
  white-space: nowrap;
}
.channel-tab[aria-selected="true"] { background: var(--color-accent-soft); color: var(--color-accent); }

.message-stream {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: var(--space-lg);
  scrollbar-width: thin;
}
.messages { display: grid; gap: var(--space-md); }
.message { display: grid; gap: var(--space-2xs); max-width: min(88%, 34rem); }
.message--mine { justify-self: end; }
.message--theirs { justify-self: start; }
.message__bubble {
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-lg);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.message--mine .message__bubble { border-color: var(--color-ink); background: var(--color-ink); color: var(--color-paper-raised); }
.message__meta { display: flex; align-items: center; gap: var(--space-xs); color: var(--color-muted); font-size: var(--text-xs); font-variant-numeric: tabular-nums; }
.message--mine .message__meta { justify-content: flex-end; }
.ai-label { color: var(--color-accent); font-weight: 700; }
.waiting { display: flex; align-items: center; gap: var(--space-xs); color: var(--color-muted); font-size: var(--text-sm); }
.waiting__dots { display: inline-flex; gap: var(--space-2xs); }
.waiting__dots i { width: 0.28rem; height: 0.28rem; border-radius: 50%; background: currentColor; animation: dot 1.1s var(--ease-in-out) infinite; }
.waiting__dots i:nth-child(2) { animation-delay: 120ms; }
.waiting__dots i:nth-child(3) { animation-delay: 240ms; }

.composer {
  padding: var(--space-sm) 0 calc(var(--space-sm) + env(safe-area-inset-bottom));
  scroll-margin-block-end: calc(var(--space-lg) + env(safe-area-inset-bottom));
  border-block-start: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}
.composer__box { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: var(--space-xs); }
.composer__input {
  min-height: 3rem;
  height: 6rem;
  max-height: 9rem;
  padding: 0.75rem var(--space-md);
  border: var(--rule-thin) solid var(--color-rule-strong);
  border-radius: var(--radius-lg);
  outline: var(--rule-focus) solid transparent;
  background: var(--color-paper-raised);
  color: var(--color-ink);
  line-height: 1.5;
  resize: none;
}
.composer__input:focus-visible { outline-color: var(--color-focus); }
.composer__send { min-width: 4rem; min-height: 3rem; padding-inline: var(--space-md); }
.composer__meta { min-height: 1.5rem; display: flex; justify-content: space-between; gap: var(--space-sm); padding-inline: var(--space-xs); color: var(--color-muted); font-size: var(--text-xs); font-variant-numeric: tabular-nums; }

.settings-list { display: grid; border-block-start: var(--rule-thin) solid var(--color-rule); }
.settings-row {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-sm);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: transparent;
  text-align: start;
}
.settings-row__body { display: grid; gap: var(--space-2xs); }
.settings-row__title { font-weight: 700; }
.settings-row__copy { color: var(--color-muted); font-size: var(--text-sm); }
.settings-row__value { color: var(--color-accent); white-space: nowrap; }

.notice {
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper-soft);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}
.notice strong { color: var(--color-ink); }

.bottom-nav {
  position: fixed;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: var(--z-sticky);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: var(--space-xs) max(var(--space-md), env(safe-area-inset-left), env(safe-area-inset-right)) calc(var(--space-xs) + env(safe-area-inset-bottom));
  border-block-start: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper-raised);
  box-shadow: 0 -1px 2px var(--color-shadow);
}
.bottom-nav__item {
  min-height: 3.5rem;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-3xs);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  white-space: nowrap;
}
.bottom-nav__item[aria-current="page"] { color: var(--color-accent); background: var(--color-accent-soft); }
.bottom-nav__item svg { width: 1.25rem; height: 1.25rem; }

html[data-embedded="true"] .topbar__action[data-action="back"] span {
  display: none;
}

html[data-embedded="true"] .topbar__action[data-action="back"] {
  min-width: 2.75rem;
  padding-inline: var(--space-xs);
}

.toast-region {
  position: fixed;
  inset-inline: max(var(--space-md), env(safe-area-inset-left), env(safe-area-inset-right));
  inset-block-end: calc(6.5rem + env(safe-area-inset-bottom));
  z-index: var(--z-toast);
  display: grid;
  justify-items: center;
  pointer-events: none;
}
.toast {
  width: min(100%, 28rem);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-paper-raised);
  box-shadow: 0 1px 2px var(--color-shadow);
  pointer-events: auto;
  animation: toast-in var(--dur-long) var(--ease-out) both;
}
.toast--error { background: var(--color-error); color: var(--color-accent-ink); }

.dialog {
  position: fixed;
  inset: 0;
  width: min(calc(100% - 2rem), 28rem);
  max-height: min(80dvh, 40rem);
  margin: auto;
  padding: 0;
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-lg);
  background: var(--color-paper-raised);
  color: var(--color-ink);
}
.dialog::backdrop { background: var(--color-overlay); }
.dialog[open] { animation: dialog-in var(--dur-long) var(--ease-out) both; }
.dialog__body { display: grid; gap: var(--space-lg); padding: var(--space-lg); }
.dialog__title { font-size: var(--text-xl); }
.dialog__copy { color: var(--color-ink-soft); }
.dialog__actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-sm); }

.inline-error {
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-thin) solid var(--color-error);
  border-radius: var(--radius-md);
  background: var(--color-error-soft);
  color: var(--color-error);
}

.auth-note { color: var(--color-muted); font-size: var(--text-sm); }
.auth-note a { color: var(--color-accent); }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes breathe { to { opacity: 0.42; } }
@keyframes dot { 0%, 100% { opacity: 0.25; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-0.15rem); } }
@keyframes toast-in { from { opacity: 0; transform: translateY(0.5rem); } }
@keyframes dialog-in { from { opacity: 0; transform: scale(0.96); } }

@media (hover: hover) and (pointer: fine) {
  .button:hover { transform: translateY(-1px); }
  .button--primary:hover { background: var(--color-accent); color: var(--color-accent-ink); }
  .button--accent:hover { background: var(--color-accent-hover); color: var(--color-accent-ink); }
  .button--secondary:hover,
  .topbar__action:hover,
  .icon-button:hover,
  .text-button:hover { background: var(--color-paper-soft); color: var(--color-ink); }
  .field__control:hover,
  .composer__input:hover { background: var(--color-paper-soft); }
  .person-row:hover { background: var(--color-paper-soft); }
  .choice:hover { background: var(--color-paper-soft); }
  .bottom-nav__item:hover { color: var(--color-ink); }
}

@media (min-width: 40rem) {
  .view { padding-inline: var(--space-xl); }
  .view--auth { grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1fr); align-items: start; gap: var(--space-2xl); }
  .view--auth .brand { position: sticky; inset-block-start: var(--space-xl); }
  .form-actions { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .page-head { padding-block-start: var(--space-2xl); }
  .person-row { padding-inline: var(--space-sm); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
  .skeleton,
  .waiting__dots i { animation: none; }
}