/* Nucleo — dark purple theme */
:root {
  --bg:         #07080F;
  --sidebar-bg: #1C2040;
  --sidebar-bg2:#161A35;
  --primary:    #8B5CF6;
  --primary-dim: rgba(139,92,246,0.15);
  --border:     #3D2F7A;
  --border-dim: #242038;
  --text:       #E8E8F4;
  --text-muted: #9090B8;
  --surface:    #111428;
  --surface2:   #0C0F20;
  --msg-user-bg: linear-gradient(135deg,#1E1250 0%,#170F3D 100%);
  --msg-bot-bg:  linear-gradient(135deg,#111428 0%,#0C0F20 100%);
  --sidebar-w:  260px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #4C3A9E; border-radius: 3px; }

/* ── Layout ─────────────────────────────────────────── */

.layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────── */

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--sidebar-bg) 0%, var(--sidebar-bg2) 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 20px 16px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.3px;
}

.sidebar-user {
  padding: 0 16px 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.sidebar-user strong { color: var(--text); }

.sidebar-actions {
  padding: 0 10px 8px;
  display: flex;
  gap: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  padding: 6px 12px;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  font-family: var(--font);
}

.btn:hover { background: var(--primary-dim); border-color: var(--primary); }

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: #7C3AED; border-color: #7C3AED; }

.btn-sm { padding: 4px 8px; font-size: 12px; }
.btn-icon { padding: 4px 8px; }
.btn-full { width: 100%; }

.sidebar-section-label {
  padding: 8px 16px 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.session-search {
  margin: 0 10px 6px;
  padding: 5px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  color: var(--text);
  font-size: 12px;
  width: calc(100% - 20px);
  font-family: var(--font);
}
.session-search:focus { outline: none; border-color: var(--primary); }

.session-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 6px;
}

.session-item {
  display: flex;
  align-items: center;
  border-radius: 6px;
  margin-bottom: 2px;
  overflow: hidden;
}

.session-item.active { background: rgba(139,92,246,0.18); }

.session-link {
  flex: 1;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font);
  transition: background 0.12s;
}
.session-link:hover { background: rgba(255,255,255,0.06); }
.session-item.active .session-link { color: #C4B5FD; }

.session-menu-btn {
  padding: 4px 6px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  border-radius: 4px;
  transition: color 0.12s, background 0.12s;
}
.session-menu-btn:hover { color: var(--primary); background: var(--primary-dim); }

.session-rename-form {
  padding: 4px 10px 6px;
  display: flex;
  gap: 4px;
}
.session-rename-form input {
  flex: 1;
  padding: 4px 8px;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 12px;
  font-family: var(--font);
}
.session-rename-form input:focus { outline: none; border-color: var(--primary); }

.sidebar-footer {
  padding: 10px 16px 14px;
  border-top: 1px solid var(--border-dim);
}

.usage-widget {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.7;
}
.usage-widget strong { color: var(--text); }

.resources {
  margin-bottom: 10px;
}
.resources a {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  padding: 2px 0;
}
.resources a:hover { color: var(--primary); }

/* ── Main area ───────────────────────────────────────── */

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-header {
  padding: 16px 24px 12px;
  border-bottom: 1px solid var(--border-dim);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}

/* ── Chat ────────────────────────────────────────────── */

.chat-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.starter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  max-width: 600px;
  margin: 40px auto 0;
}

.starter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
  font-family: var(--font);
  line-height: 1.4;
}
.starter-btn:hover { background: var(--primary-dim); border-color: var(--primary); }

.message {
  display: flex;
  gap: 12px;
  max-width: 820px;
  width: 100%;
}

.message.user { flex-direction: row-reverse; margin-left: auto; }

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.avatar-user { background: var(--primary); color: #fff; }
.avatar-bot  { background: var(--surface); border: 1px solid var(--border); }
.avatar-bot img { width: 20px; height: 20px; object-fit: contain; }

.bubble {
  padding: 10px 14px;
  border-radius: 12px;
  max-width: calc(100% - 44px);
  line-height: 1.65;
  font-size: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

.bubble-user {
  background: var(--msg-user-bg);
  border: 1px solid var(--border);
  border-radius: 12px 12px 2px 12px;
}

.bubble-bot {
  background: var(--msg-bot-bg);
  border: 1px solid var(--border-dim);
  border-radius: 12px 12px 12px 2px;
  width: 100%;
}

.bubble p { margin-bottom: 8px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { padding-left: 20px; margin-bottom: 8px; }
.bubble code {
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 13px;
}
.bubble pre {
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  margin-bottom: 8px;
}
.bubble pre code { background: none; padding: 0; }

.msg-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.msg-action-btn {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-dim);
  border-radius: 5px;
  color: var(--text-muted);
  font-size: 12px;
  padding: 3px 8px;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.12s, color 0.12s;
}
.msg-action-btn:hover { background: var(--primary-dim); color: var(--primary); border-color: var(--primary); }
.msg-action-btn.active { color: var(--primary); border-color: var(--primary); }

.sources-expander {
  margin-top: 8px;
}

.sources-expander summary {
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 0;
}
.sources-expander summary::-webkit-details-marker { display: none; }
.sources-expander[open] summary { color: var(--primary); }

.source-chip {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--text-muted);
  margin: 3px 3px 0 0;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 5px;
  padding: 12px 14px;
  align-items: center;
}
.typing-dot {
  width: 7px; height: 7px;
  background: var(--primary);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
  opacity: 0.7;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

/* ── Chat input ──────────────────────────────────────── */

.chat-input-area {
  padding: 12px 24px 16px;
  border-top: 1px solid var(--border-dim);
  flex-shrink: 0;
}

.chat-form {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-textarea {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  padding: 10px 14px;
  resize: none;
  max-height: 140px;
  overflow-y: auto;
  line-height: 1.5;
  transition: border-color 0.15s;
}
.chat-textarea:focus { outline: none; border-color: var(--primary); }
.chat-textarea::placeholder { color: var(--text-muted); }

.send-btn {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--primary);
  border: none;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
  flex-shrink: 0;
}
.send-btn:hover { background: #7C3AED; }
.send-btn:disabled { background: #4B3A80; cursor: not-allowed; }

/* ── Admin page ──────────────────────────────────────── */

.admin-content {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
}

.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 16px;
  max-width: 700px;
}

.admin-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.doc-table th {
  text-align: left;
  padding: 6px 10px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-dim);
  font-weight: 500;
}
.doc-table td {
  padding: 6px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text);
}
.tier-badge {
  background: var(--primary-dim);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  color: var(--primary);
}

.status-msg {
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 6px;
  margin-top: 8px;
}
.status-ok    { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #86efac; }
.status-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }

/* ── Login page ──────────────────────────────────────── */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px 44px;
  width: 380px;
  max-width: 95vw;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

.login-logo {
  width: 52px;
  margin-bottom: 12px;
}

.login-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.btn-microsoft {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 16px;
  background: #2F6FD4;
  border: none;
  border-radius: 7px;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font);
  text-decoration: none;
  transition: background 0.15s;
}
.btn-microsoft:hover { background: #2563BC; text-decoration: none; }

.login-error {
  margin-top: 16px;
  font-size: 13px;
  color: #fca5a5;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 6px;
  padding: 8px 12px;
}

/* ── Utility ─────────────────────────────────────────── */

.htmx-indicator { display: none; }
.htmx-request .htmx-indicator { display: inline-flex; }
.htmx-request.htmx-indicator  { display: inline-flex; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.text-muted { color: var(--text-muted); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }