/* hosting-brain — GosZakup-style (shadcn new-york + neutral, --radius 0.5rem) */

:root {
  --background: 0 0% 100%;
  --foreground: 222.2 84% 4.9%;
  --card: 0 0% 100%;
  --card-foreground: 222.2 84% 4.9%;
  --popover: 0 0% 100%;
  --popover-foreground: 222.2 84% 4.9%;
  --primary: 211 100% 40%;
  --primary-foreground: 210 40% 98%;
  --secondary: 146 64% 33%;
  --secondary-foreground: 210 40% 98%;
  --muted: 210 40% 96.1%;
  --muted-foreground: 215.4 16.3% 46.9%;
  --accent: 43 100% 50%;
  --accent-foreground: 222.2 47.4% 11.2%;
  --destructive: 0 84.2% 60.2%;
  --destructive-foreground: 210 40% 98%;
  --border: 214.3 31.8% 91.4%;
  --input: 214.3 31.8% 91.4%;
  --ring: 211 100% 40%;
  --radius: 0.5rem;
  --sidebar-w: 16rem;
  --sidebar-w-collapsed: 4rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow:    0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: 222.2 84% 4.9%;
    --foreground: 210 40% 98%;
    --card: 222.2 84% 4.9%;
    --card-foreground: 210 40% 98%;
    --popover: 222.2 84% 4.9%;
    --popover-foreground: 210 40% 98%;
    --primary: 211 100% 50%;
    --primary-foreground: 222.2 47.4% 11.2%;
    --secondary: 146 64% 40%;
    --secondary-foreground: 210 40% 98%;
    --muted: 217.2 32.6% 17.5%;
    --muted-foreground: 215 20.2% 65.1%;
    --accent: 43 100% 55%;
    --accent-foreground: 222.2 47.4% 11.2%;
    --border: 217.2 32.6% 17.5%;
    --input: 217.2 32.6% 17.5%;
    --ring: 211 100% 50%;
  }
}

* { box-sizing: border-box; }
*, ::before, ::after { border-color: hsl(var(--border)); }
html, body { height: 100%; margin: 0; }
body {
  background: hsl(var(--muted) / 0.4);  /* slate-50 vibe across the app */
  color: hsl(var(--foreground));
  font: 14px/1.5 "Inter", "InterVariable", -apple-system, "Segoe UI", Roboto, sans-serif;
  font-feature-settings: "rlig" 1, "calt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 100%;
  height: 100vh; height: 100dvh;
  overflow: hidden;
  transition: grid-template-columns 0.25s ease;
}
body.sidebar-collapsed { grid-template-columns: var(--sidebar-w-collapsed) 1fr; }

button, input, textarea { font-family: inherit; }

/* lucide icons — small visual default */
[data-lucide] { width: 1rem; height: 1rem; stroke-width: 2; }

/* gradient text utility (matches GZ) */
.text-gradient {
  background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* ---------- login ---------- */
.login-body {
  display: grid; place-items: center;
  grid-template-columns: 1fr;
  background:
    radial-gradient(ellipse 60% 50% at 30% 20%, hsl(var(--primary) / 0.06), transparent 70%),
    radial-gradient(ellipse 60% 50% at 70% 80%, hsl(var(--accent) / 0.06), transparent 70%),
    linear-gradient(180deg, hsl(var(--muted)), hsl(var(--background)));
}
.login-card {
  background: hsl(var(--card)); padding: 32px;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid hsl(var(--border)); width: min(380px, 92vw);
  display: flex; flex-direction: column; gap: 12px;
  box-shadow: var(--shadow-md);
}
.login-card h1 { margin: 0 0 8px; font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.login-card .err { color: hsl(var(--destructive)); margin: 0; font-size: 14px; }
.login-card input {
  font: inherit; padding: 10px 14px;
  border-radius: calc(var(--radius) - 2px);
  border: 1px solid hsl(var(--input)); background: hsl(var(--background));
  color: hsl(var(--foreground)); transition: border-color .12s, box-shadow .12s;
}
.login-card input:focus {
  outline: none; border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / 0.2);
}
.login-card button {
  font: inherit; font-weight: 500; padding: 10px 14px; height: 40px;
  background: hsl(var(--primary)); color: hsl(var(--primary-foreground));
  border: none; border-radius: calc(var(--radius) - 2px);
  cursor: pointer; transition: background .12s;
}
.login-card button:hover { background: hsl(var(--primary) / 0.9); }

/* ---------- sidebar ---------- */
.sidebar {
  background: hsl(var(--card));
  border-right: 1px solid hsl(var(--border));
  display: flex; flex-direction: column;
  overflow: hidden; min-height: 0;
}
.sidebar-top {
  display: flex; align-items: center; gap: 8px;
  padding: 16px;
  border-bottom: 1px solid hsl(var(--border));
  height: 64px;
}
body.sidebar-collapsed .sidebar-top { padding: 16px 8px; justify-content: center; }
.brand {
  flex: 1; display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 16px; letter-spacing: -0.01em;
  overflow: hidden; white-space: nowrap;
}
.brand-icon {
  width: 32px; height: 32px; border-radius: calc(var(--radius) - 2px);
  background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--secondary)));
  display: grid; place-items: center; flex-shrink: 0;
  color: white; font-weight: 700;
}
body.sidebar-collapsed .brand-text { display: none; }
body.sidebar-collapsed .sidebar-collapse-btn { display: none; }

.sidebar-collapse-btn {
  background: transparent; border: none;
  width: 32px; height: 32px; border-radius: calc(var(--radius) - 2px);
  display: grid; place-items: center;
  color: hsl(var(--muted-foreground)); cursor: pointer;
  transition: background .12s, color .12s;
}
.sidebar-collapse-btn:hover { background: hsl(var(--muted)); color: hsl(var(--foreground)); }
.sidebar-expand-btn {
  display: none; background: transparent; border: none; cursor: pointer;
  width: 40px; height: 40px; border-radius: calc(var(--radius) - 2px);
  align-items: center; justify-content: center; color: hsl(var(--muted-foreground));
}
.sidebar-expand-btn:hover { background: hsl(var(--muted)); color: hsl(var(--foreground)); }
body.sidebar-collapsed .sidebar-expand-btn { display: flex; margin: 8px auto; }

#newChat {
  margin: 16px 16px 8px; padding: 0 16px; height: 40px;
  border-radius: calc(var(--radius) - 2px);
  background: hsl(var(--primary)); color: hsl(var(--primary-foreground));
  border: none; font-weight: 500; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 14px; transition: background .12s;
}
#newChat:hover { background: hsl(var(--primary) / 0.9); }
body.sidebar-collapsed #newChat {
  margin: 16px 12px; padding: 0; width: 40px;
}
body.sidebar-collapsed #newChat span { display: none; }

.sidebar-search { padding: 4px 16px 12px; }
body.sidebar-collapsed .sidebar-search { display: none; }
.sidebar-search input {
  width: 100%; padding: 8px 12px; height: 36px;
  border-radius: calc(var(--radius) - 2px);
  background: hsl(var(--background));
  border: 1px solid hsl(var(--input));
  color: hsl(var(--foreground)); font: inherit; font-size: 13px;
  transition: border-color .12s, box-shadow .12s;
}
.sidebar-search input:focus {
  outline: none; border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / 0.2);
}

.conv-list {
  overflow-y: auto; flex: 1; padding: 4px 12px 8px; min-height: 0;
}
body.sidebar-collapsed .conv-list { padding: 4px 8px 8px; }
.conv-section-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: hsl(var(--muted-foreground)); padding: 12px 8px 6px; font-weight: 600;
}
body.sidebar-collapsed .conv-section-label { display: none; }
.conv-item {
  padding: 8px 12px; border-radius: calc(var(--radius) - 2px);
  cursor: pointer; margin-bottom: 2px;
  border: 1px solid transparent;
  transition: background .12s, border-color .12s;
}
.conv-item:hover { background: hsl(var(--muted)); }
.conv-item.active {
  background: hsl(var(--primary) / 0.10);
  border-right: 2px solid hsl(var(--primary));
  border-radius: calc(var(--radius) - 2px) 0 0 calc(var(--radius) - 2px);
}
.conv-item.active .conv-title { color: hsl(var(--primary)); }
.conv-item .conv-title {
  font-size: 13px; line-height: 1.35; color: hsl(var(--foreground));
  font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}
.conv-item .conv-meta {
  color: hsl(var(--muted-foreground)); font-size: 11.5px; margin-top: 4px;
  display: flex; justify-content: space-between; gap: 8px;
}
body.sidebar-collapsed .conv-item { display: none; }

.sidebar-footer {
  border-top: 1px solid hsl(var(--border)); padding: 12px 16px;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: hsl(var(--muted-foreground));
  background: hsl(var(--card));
}
body.sidebar-collapsed .sidebar-footer { display: none; }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 10px; border-radius: 9999px;
  font-size: 11.5px; font-weight: 500;
  border: 1px solid transparent;
}
.pill.ok {
  color: hsl(var(--secondary)); background: hsl(var(--secondary) / 0.10);
  border-color: hsl(var(--secondary) / 0.25);
}
.pill.ok .dot {
  background: hsl(var(--secondary));
  width: 6px; height: 6px; border-radius: 50%; display: inline-block;
}

/* ---------- main ---------- */
.main {
  display: flex; flex-direction: column; min-width: 0;
  min-height: 0; height: 100%; position: relative;
  background: hsl(var(--muted) / 0.4);
}
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 24px; height: 64px;
  border-bottom: 1px solid hsl(var(--border));
  background: hsl(var(--card) / 0.85);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  position: sticky; top: 0; z-index: 5;
}
#toggleSidebar {
  display: none;
  background: transparent; border: none; cursor: pointer;
  width: 36px; height: 36px; border-radius: calc(var(--radius) - 2px);
  color: hsl(var(--muted-foreground));
}
#toggleSidebar:hover { background: hsl(var(--muted)); color: hsl(var(--foreground)); }

.session-label {
  color: hsl(var(--foreground)); font-size: 14px; font-weight: 500; flex: 1;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cost-label {
  color: hsl(var(--muted-foreground)); font-size: 12px;
  font-variant-numeric: tabular-nums; white-space: nowrap;
}

.statusline {
  display: inline-flex; align-items: center; gap: 6px;
  font-variant-numeric: tabular-nums;
}
.status-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 8px; border-radius: calc(var(--radius) - 2px);
  background: hsl(var(--muted)); color: hsl(var(--muted-foreground));
  font-size: 11.5px; font-weight: 500; white-space: nowrap;
  border: 1px solid hsl(var(--border));
  font-family: "JetBrains Mono", ui-monospace, monospace;
}
.status-chip [data-lucide] { width: 12px; height: 12px; opacity: 0.7; }
.status-chip.warn { color: hsl(var(--accent-foreground)); background: hsl(var(--accent) / 0.20); border-color: hsl(var(--accent) / 0.40); }
.status-chip.err  { color: hsl(var(--destructive)); background: hsl(var(--destructive) / 0.10); border-color: hsl(var(--destructive) / 0.30); }

.footer-cwd {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px; color: hsl(var(--muted-foreground));
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 60%;
}

@media (max-width: 980px) {
  #ctxChip, #tokensChip { display: none; }
}
@media (max-width: 720px) {
  .statusline { display: none; }
}

.tools-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: hsl(var(--primary)); font-weight: 600;
  padding: 4px 10px; border-radius: 9999px;
  background: hsl(var(--primary) / 0.10);
  border: 1px solid transparent;
  cursor: pointer; transition: background .12s;
}
.tools-pill:hover { background: hsl(var(--primary) / 0.15); }
.tools-pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: hsl(var(--primary));
}

.messages {
  flex: 1; overflow-y: auto;
  padding: 24px 0;
  display: flex; flex-direction: column; gap: 16px;
  min-height: 0; scroll-behavior: smooth;
}
.messages > * { width: 100%; max-width: 880px; margin: 0 auto; padding: 0 24px; }

/* ---------- welcome ---------- */
.welcome {
  margin: 56px auto 0; max-width: 720px; padding: 24px;
  text-align: center;
}
.welcome .badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 9999px;
  background: hsl(var(--primary) / 0.10);
  color: hsl(var(--primary));
  font-size: 12px; font-weight: 600; margin-bottom: 22px;
  border: 1px solid hsl(var(--primary) / 0.20);
}
.welcome h2 {
  margin: 0 0 14px; font-size: 38px; font-weight: 800;
  letter-spacing: -0.02em; line-height: 1.05;
}
.welcome .sub {
  font-size: 16px; color: hsl(var(--muted-foreground));
  margin: 0 auto 32px; max-width: 540px;
}
.welcome .examples {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
  margin-top: 16px; text-align: left;
}
.welcome .ex {
  padding: 16px 18px;
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .12s, transform .08s, box-shadow .12s;
  box-shadow: var(--shadow-sm);
}
.welcome .ex:hover {
  border-color: hsl(var(--primary) / 0.5);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.welcome .ex .ex-title {
  color: hsl(var(--foreground)); font-weight: 600; margin-bottom: 4px; font-size: 14px;
  display: flex; align-items: center; gap: 8px;
}
.welcome .ex .ex-title [data-lucide] { color: hsl(var(--primary)); }
.welcome .ex .ex-body { color: hsl(var(--muted-foreground)); font-size: 13px; }
@media (max-width: 540px) { .welcome .examples { grid-template-columns: 1fr; } }

/* ---------- messages ---------- */
.msg {
  display: flex; flex-direction: column; gap: 6px;
  animation: fade-in 0.2s ease-out;
}
@keyframes fade-in { from { opacity: 0; transform: translateY(2px); } }
@keyframes slide-in { from { transform: translateX(-100%); } }
.animate-fade-in { animation: fade-in 0.2s ease-out; }

.msg-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 11.5px; color: hsl(var(--muted-foreground)); font-weight: 600;
  letter-spacing: 0.01em;
}
.msg-avatar {
  width: 22px; height: 22px;
  border-radius: calc(var(--radius) - 4px);
  display: grid; place-items: center; font-size: 12px;
  background: hsl(var(--muted));
  border: 1px solid hsl(var(--border));
  color: hsl(var(--muted-foreground));
}
.msg.user .msg-avatar {
  background: hsl(var(--primary) / 0.10);
  border-color: hsl(var(--primary) / 0.25);
  color: hsl(var(--primary));
}
.msg.assistant .msg-avatar {
  background: hsl(var(--secondary) / 0.10);
  border-color: hsl(var(--secondary) / 0.25);
  color: hsl(var(--secondary));
}
.msg.tool .msg-avatar {
  background: hsl(var(--accent) / 0.15);
  border-color: hsl(var(--accent) / 0.40);
  color: #B45309;
}
.msg.tool-result .msg-avatar {
  background: hsl(var(--secondary) / 0.10);
  border-color: hsl(var(--secondary) / 0.25);
  color: hsl(var(--secondary));
}
.msg.tool-result.error .msg-avatar {
  background: hsl(var(--destructive) / 0.10);
  border-color: hsl(var(--destructive) / 0.30);
  color: hsl(var(--destructive));
}

.msg-body {
  background: hsl(var(--card));
  border-radius: var(--radius);
  padding: 14px 16px;
  border: 1px solid hsl(var(--border));
  white-space: pre-wrap; word-break: break-word;
  box-shadow: var(--shadow-sm);
  color: hsl(var(--foreground));
}
.msg.user .msg-body {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  border-color: hsl(var(--primary));
}
.msg.user .msg-body code { background: rgba(255,255,255,0.20); }
.msg.user .msg-body a { color: rgba(255,255,255,0.9); text-decoration: underline; }
.msg.tool .msg-body, .msg.tool-result .msg-body {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
}
.msg.tool .msg-body {
  background: hsl(var(--accent) / 0.10);
  border-color: hsl(var(--accent) / 0.30);
  color: #92400e;
}
.msg.tool-result .msg-body {
  background: hsl(var(--secondary) / 0.08);
  border-color: hsl(var(--secondary) / 0.25);
  color: hsl(var(--secondary));
}
.msg.tool-result.error .msg-body {
  background: hsl(var(--destructive) / 0.08);
  border-color: hsl(var(--destructive) / 0.30);
  color: hsl(var(--destructive));
}
.msg.system .msg-body {
  background: hsl(var(--muted));
  border: 1px dashed hsl(var(--border));
  color: hsl(var(--muted-foreground));
  padding: 8px 12px; font-size: 12px;
  box-shadow: none;
}

.msg .attachment-img {
  max-width: 100%; max-height: 320px;
  border-radius: calc(var(--radius) - 2px);
  margin-top: 10px;
  border: 1px solid hsl(var(--border));
  box-shadow: var(--shadow-sm);
}
.msg .attachment-text {
  background: hsl(var(--muted));
  border-radius: calc(var(--radius) - 2px);
  padding: 8px 10px;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; overflow-x: auto; margin-top: 8px;
  color: hsl(var(--foreground));
}

.msg-body pre {
  background: hsl(222.2 47.4% 11.2%);
  color: hsl(210 40% 98%);
  padding: 14px;
  border-radius: calc(var(--radius) - 2px);
  overflow-x: auto; margin: 8px 0; font-size: 12.5px;
}
.msg.user .msg-body pre { background: rgba(0,0,0,0.30); color: rgba(255,255,255,0.95); }
.msg-body code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  background: hsl(var(--muted));
  padding: 1px 5px; border-radius: 4px;
  color: hsl(var(--foreground));
}
.msg-body pre code { background: transparent; padding: 0; color: inherit; }
.msg-body p:first-child { margin-top: 0; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body table { border-collapse: collapse; margin: 10px 0; font-size: 13px; }
.msg-body th, .msg-body td { border: 1px solid hsl(var(--border)); padding: 6px 10px; }
.msg-body th { background: hsl(var(--muted)); font-weight: 600; }
.msg-body a { color: hsl(var(--primary)); }
.msg-body a:hover { text-decoration: underline; }

/* thinking indicator */
.thinking {
  display: inline-flex; align-items: center; gap: 10px;
  color: hsl(var(--muted-foreground)); font-size: 13px;
  padding: 10px 14px; border-radius: var(--radius);
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  box-shadow: var(--shadow-sm);
  align-self: flex-start;
}
.thinking .dots { display: inline-flex; gap: 4px; }
.thinking .dots span {
  width: 6px; height: 6px; border-radius: 50%;
  background: hsl(var(--primary));
  animation: bounce 1.2s infinite ease-in-out both;
}
.thinking .dots span:nth-child(2) { animation-delay: -1.05s; }
.thinking .dots span:nth-child(3) { animation-delay: -0.9s; }
@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* ---------- composer ---------- */
.composer {
  border-top: 1px solid hsl(var(--border));
  background: hsl(var(--card) / 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  padding: 14px 24px 18px;
}
.composer > * { width: 100%; max-width: 880px; margin: 0 auto; }
.attach-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.attach-strip:empty { margin-bottom: 0; }
.attach-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: hsl(var(--muted)); border: 1px solid hsl(var(--border));
  padding: 4px 10px 4px 4px;
  border-radius: calc(var(--radius) - 2px);
  font-size: 13px; max-width: 260px;
}
.attach-chip img {
  width: 32px; height: 32px; object-fit: cover; border-radius: 6px;
}
.attach-chip .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: hsl(var(--foreground)); }
.attach-chip .rm { cursor: pointer; color: hsl(var(--muted-foreground)); padding: 0 6px; user-select: none; font-weight: 600; }
.attach-chip .rm:hover { color: hsl(var(--destructive)); }

.composer-row {
  display: flex; gap: 8px; align-items: flex-end;
  background: hsl(var(--background));
  border: 1px solid hsl(var(--input));
  border-radius: var(--radius); padding: 6px 6px 6px 8px;
  box-shadow: var(--shadow-sm);
  transition: border-color .12s, box-shadow .12s;
}
.composer-row:focus-within {
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 3px hsl(var(--ring) / 0.2);
}
#input {
  flex: 1; resize: none; min-height: 28px; max-height: 240px;
  background: transparent; border: none;
  padding: 8px 8px;
  color: hsl(var(--foreground)); font: inherit; line-height: 1.5; font-size: 14px;
}
#input:focus { outline: none; }
#input::placeholder { color: hsl(var(--muted-foreground)); }

.send-btn {
  width: 36px; height: 36px;
  border-radius: calc(var(--radius) - 2px);
  border: none;
  background: hsl(var(--primary)); color: hsl(var(--primary-foreground));
  cursor: pointer; transition: background .12s;
  display: grid; place-items: center;
}
.send-btn:disabled { background: hsl(var(--muted)); color: hsl(var(--muted-foreground)); cursor: not-allowed; }
.send-btn:not(:disabled):hover { background: hsl(var(--primary) / 0.9); }

#fileBtn {
  width: 36px; height: 36px;
  border-radius: calc(var(--radius) - 2px);
  border: none; background: transparent; color: hsl(var(--muted-foreground));
  cursor: pointer; display: grid; place-items: center;
}
#fileBtn:hover { background: hsl(var(--muted)); color: hsl(var(--foreground)); }

.composer-hint {
  display: flex; align-items: center; gap: 6px; margin-top: 10px;
  color: hsl(var(--muted-foreground)); font-size: 11.5px;
}
.conn-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: hsl(var(--muted-foreground));
}
.conn-dot[data-state="connecting"] { background: hsl(var(--accent)); animation: pulse 1.2s infinite; }
.conn-dot[data-state="connected"] { background: hsl(var(--secondary)); }
.conn-dot[data-state="closed"] { background: hsl(var(--destructive)); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ---------- wiki view ---------- */
.wiki-view {
  flex: 1; display: grid; grid-template-columns: 280px 1fr;
  min-height: 0; overflow: hidden;
}
.wiki-view[hidden] { display: none; }
.wiki-tree {
  background: hsl(var(--card));
  border-right: 1px solid hsl(var(--border));
  display: flex; flex-direction: column; min-height: 0;
}
.wiki-tree-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-bottom: 1px solid hsl(var(--border));
  font-size: 12px; font-weight: 600; color: hsl(var(--muted-foreground));
  text-transform: uppercase; letter-spacing: 0.04em;
}
.wiki-tree-head span { display: inline-flex; align-items: center; gap: 6px; }
.wiki-tree-list {
  flex: 1; overflow-y: auto; padding: 6px 8px 12px; min-height: 0;
  font-size: 13px;
}
.wiki-node {
  padding: 5px 8px; border-radius: calc(var(--radius) - 4px);
  cursor: pointer; display: flex; align-items: center; gap: 6px;
  color: hsl(var(--foreground)); user-select: none;
  white-space: nowrap;
}
.wiki-node:hover { background: hsl(var(--muted)); }
.wiki-node.dir { color: hsl(var(--foreground)); font-weight: 500; }
.wiki-node.file { color: hsl(var(--muted-foreground)); }
.wiki-node.active {
  background: hsl(var(--primary) / 0.10);
  color: hsl(var(--primary));
}
.wiki-node [data-lucide] { width: 14px; height: 14px; flex-shrink: 0; }
.wiki-node.dir [data-lucide] { color: hsl(var(--accent-foreground) / 0.7); }
.wiki-node-children { padding-left: 14px; border-left: 1px dashed hsl(var(--border)); margin-left: 8px; }

.wiki-content {
  overflow-y: auto; padding: 24px 32px;
  background: hsl(var(--muted) / 0.4);
}
.wiki-empty {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; height: 100%; gap: 12px;
  color: hsl(var(--muted-foreground)); text-align: center;
}
.wiki-empty .hint { font-size: 12.5px; max-width: 360px; line-height: 1.5; }
.wiki-doc {
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  padding: 24px 32px;
  max-width: 880px; margin: 0 auto;
  box-shadow: var(--shadow-sm);
}
.wiki-doc-head {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 12px; margin-bottom: 16px;
  border-bottom: 1px solid hsl(var(--border));
}
.wiki-doc-head .wp {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px; color: hsl(var(--primary));
  word-break: break-all;
}
.wiki-doc-head .wm {
  color: hsl(var(--muted-foreground)); font-size: 11.5px; font-variant-numeric: tabular-nums;
}
.wiki-doc-body { color: hsl(var(--foreground)); line-height: 1.65; font-size: 14.5px; }
.wiki-doc-body h1, .wiki-doc-body h2, .wiki-doc-body h3 { letter-spacing: -0.01em; margin-top: 1.4em; }
.wiki-doc-body h1 { font-size: 26px; }
.wiki-doc-body h2 { font-size: 21px; padding-bottom: 4px; border-bottom: 1px solid hsl(var(--border)); }
.wiki-doc-body h3 { font-size: 17px; }
.wiki-doc-body pre {
  background: hsl(222.2 47.4% 11.2%); color: hsl(210 40% 98%);
  padding: 16px; border-radius: calc(var(--radius) - 2px);
  overflow-x: auto; font-size: 13px;
}
.wiki-doc-body code {
  font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px;
  background: hsl(var(--muted)); padding: 1px 6px; border-radius: 4px;
}
.wiki-doc-body pre code { background: transparent; padding: 0; }
.wiki-doc-body table { border-collapse: collapse; margin: 12px 0; font-size: 13.5px; }
.wiki-doc-body th, .wiki-doc-body td { border: 1px solid hsl(var(--border)); padding: 6px 12px; }
.wiki-doc-body th { background: hsl(var(--muted)); font-weight: 600; }
.wiki-doc-body blockquote {
  border-left: 3px solid hsl(var(--primary)); padding: 4px 14px;
  color: hsl(var(--muted-foreground)); margin: 12px 0;
  background: hsl(var(--primary) / 0.04);
}
.wiki-doc-body a { color: hsl(var(--primary)); text-decoration: none; }
.wiki-doc-body a:hover { text-decoration: underline; }

@media (max-width: 720px) {
  .wiki-view { grid-template-columns: 1fr; }
  .wiki-tree { display: none; }
  .wiki-view.show-tree .wiki-tree { display: flex; }
  .wiki-view.show-tree .wiki-content { display: none; }
}

/* ---------- drop overlay ---------- */
.drop-overlay {
  position: absolute; inset: 0; pointer-events: none;
  display: grid; place-items: center; z-index: 10;
  background: hsl(var(--primary) / 0.06);
  backdrop-filter: blur(2px);
}
.drop-overlay[hidden] { display: none; }
.drop-card {
  background: hsl(var(--card));
  border: 2px dashed hsl(var(--primary));
  padding: 28px 44px; border-radius: var(--radius);
  font-size: 16px; color: hsl(var(--primary)); font-weight: 600;
  box-shadow: var(--shadow-lg);
}

/* ---------- modal (tools list) ---------- */
.modal-back {
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.50); z-index: 50;
  display: grid; place-items: center; padding: 20px;
  backdrop-filter: blur(4px);
}
.modal-back[hidden] { display: none; }
.modal {
  background: hsl(var(--card)); border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  width: min(560px, 92vw); max-height: 80vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.modal-head {
  padding: 18px 22px; border-bottom: 1px solid hsl(var(--border));
  display: flex; justify-content: space-between; align-items: center;
}
.modal-head h3 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.modal-body { padding: 16px 22px; }
.modal-tool { padding: 12px 0; border-bottom: 1px solid hsl(var(--border)); }
.modal-tool:last-child { border-bottom: none; }
.modal-tool .tn {
  color: hsl(var(--primary));
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px; font-weight: 600;
}
.modal-tool .td { color: hsl(var(--muted-foreground)); font-size: 13.5px; margin-top: 5px; line-height: 1.5; }

/* ---------- mobile ---------- */
@media (max-width: 720px) {
  body { grid-template-columns: 1fr; grid-template-rows: 100%; }
  body.sidebar-collapsed { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w); transform: translateX(-100%);
    transition: transform .2s; z-index: 30;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  #toggleSidebar { display: inline-flex; align-items: center; justify-content: center; }
  .topbar { padding: 12px 16px; }
  .messages > * { padding: 0 16px; }
  .composer { padding: 12px 16px 16px; }
  .composer > * { padding: 0; }
  /* Disable collapse on mobile (always full-width when open) */
  .sidebar-collapse-btn, .sidebar-expand-btn { display: none !important; }
}

/* ---------- scrollbars ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: hsl(var(--border));
  border-radius: 5px;
  border: 2px solid hsl(var(--card));
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: hsl(var(--muted-foreground) / 0.5);
  background-clip: padding-box;
}