@font-face {
  font-family: 'Inter';
  src: url('/ui/fonts/Inter-Variable.ttf');
  font-display: swap;
}
@font-face {
  font-family: 'Archivo';
  src: url('/ui/fonts/Archivo-Variable.ttf');
  font-display: swap;
}
@font-face {
  font-family: 'Mona Sans';
  src: url('/ui/fonts/Mona-Sans.woff2');
  font-display: swap;
}

:root {
  --bg: #f6f7f8;
  --surface: #ffffff;
  --surface-2: #fafafa;
  --text: #171717;
  --text-dim: #676767;
  --border: #e3e3e3;
  --accent: #171717;
  --accent-contrast: #ffffff;
  --rail-width: 286px;
}

body.dark {
  --bg: #0d0d0d;
  --surface: #171717;
  --surface-2: #262626;
  --text: #f9f9f9;
  --text-dim: #b4b4b4;
  --border: #333333;
  --accent: #f9f9f9;
  --accent-contrast: #171717;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(circle at 10% 0%, #dce8ff 0%, var(--bg) 40%);
  color: var(--text);
  font-family: 'Inter', 'Mona Sans', 'Noto Sans SC', sans-serif;
}
body.dark {
  background: radial-gradient(circle at 10% 0%, #1a2a46 0%, var(--bg) 34%);
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-columns: var(--rail-width) 6px 1fr;
  transition: grid-template-columns 0.2s ease;
}
.app-shell.rail-collapsed {
  grid-template-columns: 76px 6px 1fr;
}

.left-rail {
  border-right: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface), transparent 5%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  overflow: auto;
}
.app-shell.rail-collapsed .brand-copy,
.app-shell.rail-collapsed label,
.app-shell.rail-collapsed .block-head,
.app-shell.rail-collapsed .search,
.app-shell.rail-collapsed .list li .meta,
.app-shell.rail-collapsed .list li strong {
  display: none;
}
.app-shell.rail-collapsed .rail-block {
  padding: 8px;
}

.rail-resize {
  cursor: col-resize;
  background: transparent;
  position: relative;
}
.rail-resize::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}
.rail-resize:hover::before { background: #6a92ff; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(140deg, #1d9bf0, #9f6bff);
  box-shadow: 0 0 0 4px color-mix(in oklab, #1d9bf0, transparent 80%);
}
.brand h1 { margin: 0; font: 600 14px 'Archivo', sans-serif; }
.brand p { margin: 0; color: var(--text-dim); font-size: 12px; }

.rail-controls { display: flex; gap: 8px; }
.rail-block {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
}
.chat-tree-block { flex: 1; min-height: 260px; display: flex; flex-direction: column; }
.sidebar-section {
  margin-top: 10px;
}
.sidebar-section.grow {
  min-height: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.section-head h4 {
  margin: 0;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 600;
}
.scope-badge {
  font-size: 11px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}
.block-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.block-head h3 { margin: 0; font-size: 13px; }

.workspace {
  display: block;
  padding: 12px;
  min-height: 0;
}

.workspace > .chat-main {
  height: calc(100vh - 24px);
}

#meLabel { font-size: 11px; color: var(--text-dim); }

.tree {
  padding: 0;
  overflow: auto;
}

.chat-main,
.auth-card {
  background: color-mix(in oklab, var(--surface), transparent 2%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  backdrop-filter: blur(6px);
}

.chat-main { display: flex; flex-direction: column; min-height: 0; }
.chat-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.toolbar-row { display: flex; gap: 6px; margin-bottom: 6px; }
.chat-header h2 { margin: 0; font-family: 'Archivo', sans-serif; font-size: 18px; }
.chat-header p { margin: 4px 0 0; font-size: 12px; color: var(--text-dim); }
.export-row { display: grid; grid-template-columns: repeat(2, auto); gap: 6px; align-content: start; }

.messages {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 12px 2px;
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.msg {
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: var(--surface-2);
  white-space: pre-wrap;
  line-height: 1.45;
  animation: msgIn .18s ease;
}
.msg.user { border-left: 3px solid #4f7fff; }
.msg.assistant { border-left: 3px solid #22a06b; }
.msg.typing {
  display: grid;
  gap: 6px;
}
.msg-label {
  font-size: 12px;
  color: var(--text-dim);
}
.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 12px;
}
.typing-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: color-mix(in oklab, #22a06b, var(--text-dim) 45%);
  animation: thinkingPulse 1s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: .15s; }
.typing-dots span:nth-child(3) { animation-delay: .30s; }
@keyframes thinkingPulse {
  0%, 80%, 100% { transform: translateY(0); opacity: .35; }
  40% { transform: translateY(-3px); opacity: 1; }
}

.composer {
  border-top: 1px solid var(--border);
  padding-top: 10px;
  display: grid;
  gap: 8px;
}

.auth-wrap {
  grid-column: 1 / span 3;
  display: grid;
  grid-template-columns: repeat(2, minmax(280px, 420px));
  justify-content: center;
  align-content: center;
  gap: 18px;
  padding: 20px;
}
.auth-card h2 { margin: 0 0 8px; font-family: 'Archivo', sans-serif; }
.auth-hint-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.auth-hint-row span { font-size: 12px; color: var(--text-dim); }
.password-wrap {
  position: relative;
}
.password-wrap input {
  padding-right: 62px;
}
.password-wrap .password-toggle {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: auto;
  min-width: 48px;
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1;
}
.password-wrap .password-toggle:hover {
  color: var(--text);
}

label { display: block; font-size: 12px; color: var(--text-dim); margin: 6px 0; }
input, textarea, button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 9px 10px;
  font: 500 13px 'Inter', sans-serif;
}
textarea { min-height: 90px; resize: vertical; }
input::placeholder, textarea::placeholder { color: #9b9b9b; }

.btn {
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  cursor: pointer;
  transition: transform .12s ease, opacity .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: .9; }
.btn:disabled { opacity: .65; cursor: not-allowed; transform: none; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn.small { padding: 6px 9px; font-size: 12px; }

.search { margin: 8px 0; background: color-mix(in oklab, var(--surface-2), transparent 10%); }

.list { list-style: none; margin: 0; padding: 0; overflow: auto; }
.list li {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  background: var(--surface);
}
.list li:hover { border-color: #7ea2ff; }
.list li.active { border-color: #5e8cff; box-shadow: 0 0 0 2px color-mix(in oklab, #5e8cff, transparent 80%); }
.list li.drop-target {
  border-color: #22a06b;
  box-shadow: 0 0 0 2px color-mix(in oklab, #22a06b, transparent 75%);
}
.list li .meta { font-size: 11px; color: var(--text-dim); }
.list.compact li { font-size: 12px; }
.tree .project-node {
  padding: 8px;
}
.tree .project-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.tree .project-row-left {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.tree .project-row-left strong {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree .project-toggle {
  width: 18px;
  min-width: 18px;
  height: 18px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1;
}
.tree .project-toggle:hover {
  color: var(--text);
}
.tree .project-count {
  font-size: 11px;
  color: var(--text-dim);
  background: color-mix(in oklab, var(--surface-2), transparent 10%);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
}
.tree .project-desc {
  font-size: 11px;
  color: var(--text-dim);
  margin: 4px 0 0;
}

.user-drawer {
  position: fixed;
  top: 12px;
  right: 12px;
  width: 320px;
  max-width: calc(100vw - 24px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
  z-index: 200;
}
.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding: 10px;
}
.drawer-head h3 { margin: 0; font-size: 14px; }
.drawer-body { padding: 12px; display: grid; gap: 10px; }
.drawer-actions { display: grid; gap: 8px; }
.drawer-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 6px 0;
}
.invite-admin h4 {
  margin: 0 0 8px;
  font-size: 13px;
}
.invite-stats {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--text-dim);
}
.invite-create {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}
.invite-list {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  max-height: 200px;
  overflow: auto;
}
.invite-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 6px;
  font-size: 12px;
  display: grid;
  gap: 4px;
}
.invite-item .code {
  font-family: "Mona Sans", monospace;
  font-size: 13px;
}
.invite-item .meta {
  color: var(--text-dim);
}
.invite-item .ops {
  display: flex;
  gap: 6px;
}
.invite-item .ops button {
  width: auto;
  padding: 4px 8px;
  font-size: 11px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: #0d0d0d;
  color: #fff;
  border-radius: 10px;
  padding: 9px 12px;
  z-index: 300;
}

.hidden { display: none !important; }

@media (max-width: 1100px) {
  .app-shell { grid-template-columns: 1fr; }
  .rail-resize { display: none !important; }
  .left-rail { order: 2; min-height: 320px; }
  .workspace { grid-template-columns: 1fr; }
  .auth-wrap { grid-template-columns: 1fr; grid-column: 1; }
}