:root {
  --bg-page: #f5f3ee;
  --bg-accent: #d4e5d8;
  --bg-card: #fffef9;
  --bg-panel: #fcfbf7;
  --bg-sidebar: #f0ede4;
  --ink-strong: #1f2933;
  --ink-normal: #2f3b45;
  --ink-muted: #5f6f7b;
  --line-soft: #d6d0c3;
  --line-focus: #4e7a5a;
  --action: #2d5f3f;
  --action-ink: #f2f7f3;
  --warn: #a13e2a;
  --shadow-lg: 0 24px 56px rgba(28, 36, 46, 0.16);
  --shadow-sm: 0 8px 24px rgba(28, 36, 46, 0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Trebuchet MS", "Avenir Next", "Gill Sans", sans-serif;
  color: var(--ink-normal);
  background:
    radial-gradient(60rem 60rem at -10% -10%, #e8efe2 0%, rgba(232, 239, 226, 0) 65%),
    radial-gradient(58rem 58rem at 110% 20%, #f4ead8 0%, rgba(244, 234, 216, 0) 62%),
    linear-gradient(180deg, var(--bg-page), #f7f5ef 45%, #f3f1ea 100%);
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(125deg, rgba(45, 95, 63, 0.055), rgba(0, 0, 0, 0)),
    repeating-linear-gradient(45deg, rgba(45, 95, 63, 0.024) 0 2px, transparent 2px 24px);
  z-index: 0;
}

.view {
  position: relative;
  z-index: 1;
}

.hidden {
  display: none !important;
}

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

h1,
h2,
p {
  margin: 0;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

button:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
}

.primary {
  background: var(--action);
  color: var(--action-ink);
  padding: 10px 16px;
  box-shadow: var(--shadow-sm);
}

.ghost {
  background: rgba(32, 41, 49, 0.08);
  color: var(--ink-strong);
  padding: 10px 16px;
}

.ghost.danger {
  background: rgba(161, 62, 42, 0.14);
  color: #722718;
}

.small-muted {
  color: var(--ink-muted);
  font-size: 0.86rem;
}

#auth-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(440px, 92vw);
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 14px;
}

.auth-card h1 {
  font-size: 1.9rem;
  letter-spacing: 0.01em;
  color: var(--ink-strong);
}

.subtitle {
  color: var(--ink-muted);
}

.tab-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 6px;
}

.tab-button {
  border-radius: var(--radius-sm);
  background: rgba(38, 50, 60, 0.06);
  color: var(--ink-normal);
  padding: 9px 10px;
}

.tab-button.active {
  background: rgba(45, 95, 63, 0.16);
  color: var(--ink-strong);
  font-weight: 600;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.auth-form label {
  font-size: 0.93rem;
  color: var(--ink-normal);
}

.auth-form input {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: #fff;
}

.auth-form input:focus {
  outline: 2px solid rgba(78, 122, 90, 0.24);
  border-color: var(--line-focus);
}

.check-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.check-row input {
  width: auto;
  margin: 0;
}

.status-line {
  min-height: 1.2em;
  color: var(--warn);
  font-size: 0.9rem;
}

#chat-view {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  transition: grid-template-columns 180ms ease;
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  border: 0;
  border-radius: 0;
  background: rgba(20, 28, 36, 0.28);
  z-index: 18;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.sidebar {
  background: linear-gradient(180deg, var(--bg-sidebar), #e9e3d5 120%);
  border-right: 1px solid var(--line-soft);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  transition: transform 180ms ease, padding 180ms ease;
  z-index: 24;
}

#chat-view.sidebar-collapsed {
  grid-template-columns: 0 1fr;
}

#chat-view.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
  padding-left: 0;
  padding-right: 0;
  border-right: 0;
  overflow: hidden;
}

.sidebar-header {
  display: grid;
  gap: 10px;
  padding: 6px 8px;
}

.sidebar-header h2 {
  font-size: 1.25rem;
  color: var(--ink-strong);
}

.sidebar-actions {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr 1fr;
}

.thread-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.thread-item {
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(48, 62, 72, 0.16);
  border-radius: var(--radius-md);
  padding: 10px;
  display: grid;
  gap: 8px;
}

.thread-item.selected {
  border-color: rgba(45, 95, 63, 0.54);
  background: rgba(244, 250, 246, 0.92);
}

.thread-main {
  background: transparent;
  color: var(--ink-strong);
  text-align: left;
  border-radius: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.thread-title {
  font-weight: 600;
  line-height: 1.2;
}

.thread-meta {
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.thread-delete {
  justify-self: end;
  background: rgba(161, 62, 42, 0.14);
  color: #722718;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
}

.chat-main {
  padding: 18px;
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  gap: 12px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 4px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar h1 {
  font-size: 1.4rem;
  color: var(--ink-strong);
}

.icon-toggle {
  width: 42px;
  min-width: 42px;
  height: 42px;
  padding: 0;
  font-size: 1.2rem;
  line-height: 1;
  border-radius: 999px;
}

.topbar-actions {
  display: flex;
  gap: 8px;
}

.topbar-actions .ghost.active {
  background: rgba(45, 95, 63, 0.2);
  font-weight: 600;
}

.banner {
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  border: 1px solid rgba(48, 62, 72, 0.2);
  background: rgba(236, 244, 239, 0.8);
  color: var(--ink-normal);
}

.banner.error {
  background: rgba(161, 62, 42, 0.12);
  border-color: rgba(161, 62, 42, 0.35);
  color: #7f2c1c;
}

.banner.warn {
  background: rgba(183, 127, 36, 0.16);
  border-color: rgba(183, 127, 36, 0.35);
  color: #6a4914;
}

.empty-state {
  border: 1px dashed rgba(48, 62, 72, 0.2);
  border-radius: var(--radius-md);
  padding: 14px;
  color: var(--ink-muted);
  background: rgba(255, 255, 255, 0.52);
}

.panel-view {
  display: contents;
}

.message-list {
  overflow: auto;
  padding: 2px 4px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  max-width: min(860px, 92%);
  border-radius: 18px;
  border: 1px solid rgba(48, 62, 72, 0.14);
  padding: 12px 14px;
  box-shadow: var(--shadow-sm);
  white-space: pre-wrap;
  line-height: 1.4;
}

.message.user {
  align-self: flex-end;
  background: #e8f2ea;
}

.message.assistant {
  align-self: flex-start;
  background: #fff;
}

.message-meta {
  margin-top: 6px;
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.composer {
  display: grid;
  gap: 10px;
  padding-top: 2px;
}

.composer textarea {
  width: 100%;
  resize: vertical;
  min-height: 70px;
  max-height: 220px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 12px;
  background: var(--bg-panel);
  color: var(--ink-normal);
}

.composer textarea:focus {
  outline: 2px solid rgba(78, 122, 90, 0.25);
  border-color: var(--line-focus);
}

.composer-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.profile-panel {
  display: grid;
  place-items: start;
}

.profile-card {
  width: min(980px, 100%);
  border: 1px solid rgba(48, 62, 72, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  padding: 18px;
  display: grid;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}

.profile-card h2 {
  font-size: 1.35rem;
  color: var(--ink-strong);
}

.profile-card h3 {
  margin: 0;
  font-size: 1.04rem;
  color: var(--ink-strong);
}

.profile-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.profile-head .ghost {
  white-space: nowrap;
}

.profile-section {
  display: grid;
  gap: 10px;
  border: 1px solid rgba(48, 62, 72, 0.14);
  border-radius: var(--radius-md);
  background: rgba(252, 251, 247, 0.86);
  padding: 12px;
}

.profile-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

.profile-field {
  display: grid;
  gap: 6px;
  color: var(--ink-normal);
  font-size: 0.9rem;
}

.profile-field input,
.profile-field select,
.profile-field textarea {
  width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  color: var(--ink-normal);
  padding: 9px 11px;
}

.profile-field textarea {
  resize: vertical;
  min-height: 110px;
}

.profile-field input:focus,
.profile-field select:focus,
.profile-field textarea:focus {
  outline: 2px solid rgba(78, 122, 90, 0.24);
  border-color: var(--line-focus);
}

.profile-field input[readonly] {
  color: var(--ink-muted);
}

.profile-check {
  align-self: center;
}

.profile-field-full {
  grid-column: 1 / -1;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.persona-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.persona-empty {
  color: var(--ink-muted);
  border: 1px dashed rgba(48, 62, 72, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.52);
}

.persona-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(48, 62, 72, 0.16);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.8);
  padding: 10px;
}

.persona-row.selected {
  border-color: rgba(45, 95, 63, 0.54);
  background: rgba(244, 250, 246, 0.92);
}

.persona-avatar-thumb {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid rgba(48, 62, 72, 0.18);
  background: rgba(237, 239, 243, 0.9);
}

.persona-avatar-thumb.placeholder {
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  color: var(--ink-muted);
}

.persona-main {
  min-width: 0;
}

.persona-title {
  font-weight: 600;
  color: var(--ink-strong);
  line-height: 1.2;
}

.persona-meta {
  color: var(--ink-muted);
  font-size: 0.82rem;
  margin-top: 2px;
}

.persona-actions {
  display: flex;
  gap: 6px;
}

.persona-actions button {
  padding: 7px 10px;
  font-size: 0.82rem;
}

.avatar-editor {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
}

.avatar-preview-shell {
  width: 92px;
  height: 92px;
  border-radius: 999px;
  border: 1px solid rgba(48, 62, 72, 0.18);
  overflow: hidden;
  background: rgba(237, 239, 243, 0.9);
  display: grid;
  place-items: center;
}

.persona-avatar-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.persona-avatar-fallback {
  color: var(--ink-muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 0 8px;
}

.avatar-editor-controls {
  display: grid;
  gap: 8px;
}

@media (max-width: 980px) {
  #chat-view {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 82vw);
    max-height: none;
    transform: translateX(-100%);
    border-right: 1px solid var(--line-soft);
    box-shadow: var(--shadow-lg);
  }

  #chat-view.sidebar-open .sidebar {
    transform: translateX(0);
  }

  #chat-view.sidebar-open .sidebar-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  #chat-view.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .chat-main {
    min-height: 100vh;
    padding: 14px;
  }

  .topbar-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .profile-head {
    flex-direction: column;
    align-items: stretch;
  }

  .profile-grid {
    grid-template-columns: 1fr;
  }

  .avatar-editor {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .persona-row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .persona-actions {
    width: 100%;
    justify-content: flex-start;
  }
}