:root {
  /* light theme (default) — clean white, Genspark-style */
  --bg: #ffffff;
  --bg2: #fafafa;
  --panel: #ffffff;
  --panel2: #f3f4f6;
  --border: #e5e7eb;
  --text: #1f2430;
  --text-dim: #6b7280;
  --accent: #4b7bf5;          /* BrainMap blue */
  --accent2: #2e5ed9;
  --accent-grad: linear-gradient(135deg, #4b7bf5, #78a2ff);
  --danger: #dc2626;
  --ok: #16a34a;
  --code-bg: #f6f8fa;
  --shadow: 0 6px 24px rgba(15, 23, 42, .08);
  --radius: 12px;
  --mono: "Cascadia Code", Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #0d1117;
  --bg2: #10161f;
  --panel: #161d27;
  --panel2: #1c2530;
  --border: #263140;
  --text: #e6edf3;
  --text-dim: #94a3b3;
  --accent2: #8ab0ff;
  --danger: #f0616d;
  --ok: #3fb97f;
  --code-bg: #0b0f14;
  --shadow: 0 8px 30px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

#app { display: flex; height: 100vh; overflow: hidden; }

/* ---------- sidebar ---------- */
#sidebar {
  width: 264px; min-width: 264px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 14px 12px;
  gap: 10px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 6px 10px; }
/* original BrainMap brain mark in Claude coral */
.logo-mark {
  display: inline-block;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'%3E%3Cpath fill='%234b7bf5' d='M14 42C8 40 6 32 10 27 7 20 12 13 19 13 22 6 33 5 37 10 44 5 54 9 54 17 60 20 61 30 55 34 56 41 49 46 42 44 36 49 24 49 20 44 17 45 15 44 14 42Z'/%3E%3Cpath fill='none' stroke='%232b56c8' stroke-width='2.6' stroke-linecap='round' d='M20 19c3-3 7-2 9 1M36 12c2 4 1 8-3 10M44 19c-2 3-1 6 2 8'/%3E%3Ccircle cx='25' cy='30' r='2.7' fill='%231e3f9f'/%3E%3Ccircle cx='39' cy='30' r='2.7' fill='%231e3f9f'/%3E%3Cpath fill='none' stroke='%231e3f9f' stroke-width='2.8' stroke-linecap='round' d='M24 37c4 5 12 5 16 0'/%3E%3Cpath fill='none' stroke='%234b7bf5' stroke-width='4' stroke-linecap='round' d='M22 45c-1 4-3 6-5 7'/%3E%3C/svg%3E") no-repeat center / contain;
}
.brand-logo { width: 30px; height: 30px; }
.brand-name {
  font-size: 20px; font-weight: 700; letter-spacing: .3px;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.side-nav { display: flex; flex-direction: column; gap: 2px; }
.nav-btn {
  text-align: left; padding: 9px 12px; border: 0; border-radius: 8px;
  background: transparent; color: var(--text-dim); font-size: 14px; cursor: pointer;
}
.nav-btn:hover { background: var(--panel); color: var(--text); }
.nav-btn.active { background: var(--panel2); color: var(--text); font-weight: 600; }
.tool-btn.active { background: var(--panel2); color: var(--accent); font-weight: 600; }
#tool-chip {
  display: inline-flex; align-items: center; gap: 5px; cursor: pointer;
  background: var(--accent-grad); color: #fff; font-size: 12.5px; font-weight: 600;
  padding: 5px 11px; border-radius: 999px;
}
#tool-chip:hover::after { content: " ✕"; }
.msg-save {
  margin-left: 10px; border: 1px solid var(--border); background: var(--panel);
  color: var(--text-dim); font-size: 11.5px; border-radius: 6px; padding: 2px 8px; cursor: pointer;
}
.msg-save:hover { color: var(--accent); border-color: var(--accent); }
.side-section-title {
  margin-top: 6px; padding: 0 6px; font-size: 11px; text-transform: uppercase;
  letter-spacing: .8px; color: var(--text-dim);
}
#chat-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.chat-item {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 10px; border-radius: 8px; cursor: pointer;
  color: var(--text-dim); font-size: 13px;
}
.chat-item:hover { background: var(--panel); color: var(--text); }
.chat-item.active { background: var(--panel2); color: var(--text); }
.chat-item .chat-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .chat-del { opacity: 0; border: 0; background: none; color: var(--text-dim); cursor: pointer; font-size: 13px; }
.chat-item:hover .chat-del { opacity: .8; }
.chat-item .chat-del:hover { color: var(--danger); }
.side-status { font-size: 12px; color: var(--text-dim); padding: 6px; border-top: 1px solid var(--border); }

/* ---------- main / views ---------- */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.view { display: none; flex: 1; min-height: 0; flex-direction: column; }
.view.active { display: flex; }
.view-scroll { overflow-y: auto; padding: 28px 34px 60px; max-width: 1060px; width: 100%; margin: 0 auto; }
.view-title { margin: 0 0 6px; font-size: 26px; }
.view-sub { margin: 0 0 22px; color: var(--text-dim); }
.section-title { margin: 26px 0 12px; }

/* ---------- chat ---------- */
#messages { flex: 1; overflow-y: auto; padding: 26px 0 10px; }
.msg { max-width: 880px; margin: 0 auto 18px; padding: 0 28px; display: flex; gap: 12px; }
.msg-avatar { font-size: 20px; line-height: 1.5; }
.msg-body { min-width: 0; flex: 1; }
.msg-user .msg-content {
  background: var(--panel2); border: 1px solid var(--border);
  padding: 10px 14px; border-radius: var(--radius); white-space: pre-wrap;
}
.msg-assistant .msg-content { line-height: 1.65; }
.msg-meta { font-size: 11.5px; color: var(--text-dim); margin-top: 6px; }
.msg-content p { margin: 0 0 10px; }
.msg-content h1, .msg-content h2, .msg-content h3 { margin: 14px 0 8px; }
.msg-content ul, .msg-content ol { margin: 6px 0 10px; padding-left: 22px; }
.msg-content li { margin: 3px 0; }
.msg-content code {
  font-family: var(--mono); font-size: 13px;
  background: var(--panel2); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: 5px;
}
.msg-content pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; overflow-x: auto;
}
.msg-content pre code { background: none; border: 0; padding: 0; }
.msg-content blockquote {
  margin: 8px 0; padding: 4px 14px; border-left: 3px solid var(--accent);
  color: var(--text-dim);
}
.msg-content a { color: var(--accent2); }
.msg-content table { border-collapse: collapse; margin: 10px 0; font-size: 14px; }
.msg-content td, .msg-content th { border: 1px solid var(--border); padding: 6px 10px; }
.msg-content th { background: var(--panel2); }
sup.cite {
  cursor: pointer; color: var(--accent2); font-weight: 700; padding: 0 1px;
}
.sources-box {
  margin-top: 10px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel); font-size: 13px;
}
.sources-box summary { cursor: pointer; padding: 8px 12px; color: var(--text-dim); }
.source-hit { padding: 8px 14px; border-top: 1px solid var(--border); }
.source-hit .sh-title { font-weight: 600; }
.source-hit .sh-snippet { color: var(--text-dim); margin-top: 3px; font-size: 12.5px; }
.cursor-blink { display: inline-block; width: 8px; height: 16px; background: var(--accent2); animation: blink 1s infinite; vertical-align: text-bottom; border-radius: 2px; }
@keyframes blink { 50% { opacity: 0; } }
.thinking-hint { color: var(--text-dim); font-style: italic; margin-right: 8px; animation: blink 1.6s infinite; }
.source-hit.flash { background: var(--panel2); transition: background .3s; }
.ok-chip { color: var(--ok) !important; border-color: var(--ok) !important; }
.cli-card { border-left: 3px solid var(--accent); }

.empty-state { max-width: 620px; margin: 10vh auto 0; text-align: center; padding: 0 28px; }
.empty-logo { font-size: 56px; width: 76px; height: 76px; margin: 0 auto; }
.empty-state h1 { font-size: 30px; margin: 10px 0; }
.empty-state p { color: var(--text-dim); line-height: 1.6; }
.quick-actions { display: flex; gap: 10px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.chip {
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  padding: 9px 16px; border-radius: 999px; cursor: pointer; font-size: 14px;
}
.chip:hover { border-color: var(--accent); }

/* ---------- composer ---------- */
#composer { padding: 10px 28px 22px; }
.composer-box {
  max-width: 880px; margin: 0 auto;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 10px 12px;
  box-shadow: var(--shadow);
}
.composer-box:focus-within { border-color: var(--accent); }
#input {
  width: 100%; background: transparent; border: 0; outline: 0; resize: none;
  color: var(--text); font: inherit; font-size: 15px; padding: 6px 6px 8px;
  max-height: 180px;
}
.composer-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.composer-row select {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 8px; font-size: 12.5px; max-width: 210px;
}
.spacer { flex: 1; }

.toggle { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; font-size: 12.5px; color: var(--text-dim); }
.toggle input { display: none; }
.toggle-slider {
  width: 32px; height: 18px; border-radius: 999px; background: var(--panel2);
  border: 1px solid var(--border); position: relative; transition: .15s;
}
.toggle-slider::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--text-dim); transition: .15s;
}
.toggle input:checked + .toggle-slider { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + .toggle-slider::after { left: 16px; background: #fff; }

/* ---------- buttons / forms ---------- */
.btn {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 8px 16px; font-size: 14px; cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: default; }
.btn-primary { background: var(--accent-grad); border: 0; color: #fff; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-block { width: 100%; }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); }

input[type=text], input[type=password], input[type=number], textarea, select {
  background: var(--bg2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 8px 11px; font: inherit; font-size: 14px;
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }
input[type=file] { color: var(--text-dim); font-size: 13px; }

/* ---------- cards ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
}
.card h3 { margin: 0 0 6px; font-size: 15.5px; }
.card p { margin: 0 0 10px; color: var(--text-dim); font-size: 13px; }
.card textarea, .card input[type=text] { width: 100%; margin-bottom: 8px; }
.form-row { display: flex; gap: 8px; }
.form-row input { flex: 1; margin-bottom: 0 !important; }
.form-row.wrap { flex-wrap: wrap; }
.form-row.wrap > * { margin-bottom: 0 !important; }

.section-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 28px 0 12px; flex-wrap: wrap; }
.section-head h2 { margin: 0; }
#kb-search { min-width: 320px; flex: 1; max-width: 480px; }
.badge {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 999px;
  font-size: 12px; padding: 2px 10px; color: var(--text-dim); vertical-align: 2px;
}

/* ---------- source list ---------- */
.source-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 14px; margin-bottom: 8px;
}
.source-icon { font-size: 20px; }
.source-info { flex: 1; min-width: 0; }
.source-title { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.source-origin { color: var(--text-dim); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.source-meta { color: var(--text-dim); font-size: 12px; white-space: nowrap; }

.search-hit {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 14px; margin-bottom: 8px;
}
#lit-results { max-height: 320px; overflow-y: auto; margin-top: 8px; }
.lit-hit { border-top: 1px solid var(--border); padding: 9px 2px; }
.lit-title { font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.lit-meta { font-size: 12px; color: var(--text-dim); margin: 3px 0 6px; }
.search-hit .sh-head { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; }
.search-hit .sh-text { color: var(--text-dim); font-size: 13px; margin-top: 5px; line-height: 1.5; }

/* ---------- provider cards ---------- */
.provider-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; margin-bottom: 12px;
}
.provider-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.provider-logo { font-size: 22px; }
.provider-name { font-weight: 700; font-size: 16px; }
.provider-type {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  background: var(--panel2); border: 1px solid var(--border); color: var(--text-dim);
}
.provider-status { margin-left: auto; font-size: 12.5px; }
.provider-status.ok { color: var(--ok); }
.provider-status.err { color: var(--danger); }
.provider-body { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.provider-body input[type=password], .provider-body input[type=text] { flex: 1; min-width: 220px; }
.provider-hint { font-size: 12px; color: var(--text-dim); margin-top: 8px; }
.provider-hint a { color: var(--accent2); }

.defaults-card .form-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin-bottom: 14px;
}
.defaults-card label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--text-dim); }

body.hosted #disk-card { display: none; }

/* ---------- auth ---------- */
#auth-screen {
  position: fixed; inset: 0; z-index: 50; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.auth-card {
  width: min(400px, 92vw); background: var(--panel); border: 1px solid var(--border);
  border-radius: 18px; padding: 30px 30px 26px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 11px;
}
.auth-brand { display: flex; align-items: center; gap: 10px; justify-content: center; }
.auth-tag { margin: 0 0 6px; color: var(--text-dim); font-size: 13.5px; text-align: center; line-height: 1.5; }
.auth-tabs { display: flex; gap: 6px; background: var(--panel2); border-radius: 10px; padding: 4px; }
.auth-tab { flex: 1; border: 0; background: transparent; color: var(--text-dim); padding: 8px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.auth-tab.active { background: var(--panel); color: var(--text); font-weight: 600; box-shadow: var(--shadow); }
.auth-error { color: var(--danger); font-size: 13px; min-height: 16px; }
.auth-divider {
  display: flex; align-items: center; gap: 10px; color: var(--text-dim);
  font-size: 12px; margin: 2px 0;
}
.auth-divider::before, .auth-divider::after {
  content: ""; flex: 1; height: 1px; background: var(--border);
}
.google-btn {
  display: flex; align-items: center; justify-content: center; gap: 9px;
  text-decoration: none; font-weight: 600;
}
.g-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%; font-weight: 800; font-size: 13px;
  background: conic-gradient(#ea4335 0 25%, #fbbc05 25% 50%, #34a853 50% 75%, #4285f4 75% 100%);
  color: #fff;
}
#account-box { border-top: 1px solid var(--border); padding: 8px 6px 2px; display: flex; flex-direction: column; gap: 7px; }
.acct-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
#acct-email { font-size: 12.5px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; }
.badge-pro { background: var(--accent-grad) !important; color: #fff !important; border: 0 !important; }
.shared-badge { font-size: 11px; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 1px 8px; }

/* ---------- toasts ---------- */
#toast-holder { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 99; }
.toast {
  background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  color: var(--text); border-radius: 10px; padding: 11px 16px; font-size: 13.5px;
  max-width: 380px; box-shadow: var(--shadow);
  animation: slide-in .2s ease;
}
.toast.err { border-left-color: var(--danger); }
.toast.ok { border-left-color: var(--ok); }
@keyframes slide-in { from { transform: translateX(30px); opacity: 0; } }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--panel2); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--border); }

@media (max-width: 760px) {
  #sidebar { display: none; }
  .msg { padding: 0 14px; }
  #composer { padding: 8px 12px 14px; }
}