:root {
  --bg: #0a0e1a;
  --bg-soft: #121829;
  --panel: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eaf0;
  --text-dim: #9aa3b8;
  --gold: #d4a853;
  --gold-soft: #f0c674;
  --accent: #3b6bd6;
  --danger: #d4624f;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
}

.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: linear-gradient(180deg, #0d1224 0%, #0a0e1a 100%);
  border-right: 1px solid var(--border);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { font-size: 28px; }
.brand h1 { margin: 0; font-size: 20px; font-weight: 700; }
.brand p { margin: 2px 0 0; font-size: 12px; color: var(--text-dim); }

.filter-block label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.filter-block select {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.filter-block select:focus { border-color: var(--gold); }

.hint { font-size: 12px; color: var(--text-dim); line-height: 1.6; }
.hint p { margin: 6px 0; }
.hint ul { margin: 6px 0; padding-left: 16px; }
.hint li { margin: 4px 0; }
.hint strong { color: var(--gold-soft); }
.hint .disclaimer {
  border-top: 1px solid var(--border);
  padding-top: 10px;
  margin-top: 14px;
  color: var(--gold);
}

/* ---------- Chat ---------- */
.chat {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-width: 0;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.msg {
  max-width: 78%;
  padding: 14px 18px;
  border-radius: 14px;
  line-height: 1.6;
  font-size: 14.5px;
  white-space: pre-wrap;
  word-wrap: break-word;
  animation: fadeIn 0.25s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.msg.user {
  align-self: flex-end;
  background: var(--accent);
  border-bottom-right-radius: 4px;
}
.msg.assistant {
  align-self: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg.error {
  align-self: flex-start;
  background: rgba(212, 98, 79, 0.12);
  border: 1px solid var(--danger);
  color: #f2b8ad;
}

/* Fontes */
.sources { margin-top: 12px; }
.sources summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--gold-soft);
  letter-spacing: 0.04em;
}
.source {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--panel);
  border-left: 2px solid var(--gold);
  border-radius: 6px;
  font-size: 12.5px;
}
.source .meta { color: var(--gold); font-weight: 600; }
.source .natureza { color: var(--gold-soft); font-size: 11.5px; margin-top: 4px; letter-spacing: 0.02em; }
.source .ementa { color: var(--text-dim); margin-top: 6px; line-height: 1.5; }
.source .source-link {
  display: inline-block;
  margin-top: 6px;
  color: var(--accent);
  font-size: 12px;
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
}
.source .source-link:hover { color: var(--gold-soft); border-bottom-color: var(--gold-soft); }

.typing {
  align-self: flex-start;
  display: flex;
  gap: 6px;
  padding: 14px 18px;
}
.typing span {
  width: 7px; height: 7px;
  background: var(--text-dim);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.5; } 30% { transform: translateY(-5px); opacity: 1; } }

/* Composer */
.composer {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}
.composer textarea {
  flex: 1;
  resize: none;
  max-height: 160px;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  outline: none;
  line-height: 1.5;
}
.composer textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(212, 168, 83, 0.15); }
.composer button {
  width: 44px; height: 44px;
  border: none;
  border-radius: 10px;
  background: var(--gold);
  color: #1a1408;
  font-size: 18px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}
.composer button:hover { background: var(--gold-soft); transform: translateY(-1px); }
.composer button:disabled { opacity: 0.5; cursor: not-allowed; }
.composer .attach-btn {
  background: var(--panel);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.composer .attach-btn:hover { background: var(--bg-soft); color: var(--gold-soft); }

/* Exportação da resposta */
.export-bar { display: flex; gap: 8px; margin-top: 10px; }
.export-btn {
  padding: 6px 12px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.export-btn:hover { border-color: var(--gold); color: var(--gold-soft); }
.export-btn:disabled { opacity: 0.5; cursor: wait; }

/* ---------- Login ---------- */
.login-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 8, 15, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  backdrop-filter: blur(6px);
}
.login-overlay.hidden { display: none; }
.login-card {
  width: 340px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}
.login-card .logo { font-size: 32px; }
.login-card h2 { margin: 0; }
.login-card .sub { margin: 0 0 8px; color: var(--text-dim); font-size: 13px; }
.login-card input {
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.login-card input:focus { border-color: var(--gold); }
.login-card button {
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--gold);
  color: #1a1408;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.login-card button:hover { background: var(--gold-soft); }
.login-error { color: #f2b8ad; font-size: 12.5px; min-height: 16px; }

.logout-btn {
  margin-top: auto;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
}
.logout-btn:hover { border-color: var(--danger); color: #f2b8ad; }

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .msg { max-width: 92%; }
}