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

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #eef2ff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  transition: background 0.3s;
}
body.dark { background: #0a0a1f; color: #e0e0ff; }

/* ── Container ───────────────────────────────────────────────────────────── */
.chat-container {
  width: 460px;
  max-width: 98vw;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 12px 40px rgba(80,60,180,0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 92vh;
  max-height: 760px;
}
body.dark .chat-container {
  background: #10103a;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.chat-header {
  background: linear-gradient(135deg, #5b35e8, #2563eb);
  color: #fff;
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  gap: 8px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;        /* allow shrink */
  flex: 1;
}

.header-logo { font-size: 22px; flex-shrink: 0; }

.header-title-block {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.header-title {
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-badge {
  font-size: 10px;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

/* ── Header Buttons ──────────────────────────────────────────────────────── */
.header-btns {
  display: flex;
  gap: 5px;
  align-items: center;
  flex-shrink: 0;
}

.header-btns button {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  padding: 5px 8px;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
  transition: background 0.2s, transform 0.1s;
  line-height: 1;
}
.header-btns button:hover {
  background: rgba(255,255,255,0.28);
  transform: translateY(-1px);
}

/* Logout stands out */
.logout-btn {
  background: rgba(239,68,68,0.25) !important;
  border-color: rgba(239,68,68,0.5) !important;
  font-size: 12px !important;
  padding: 5px 10px !important;
  font-weight: 600 !important;
  letter-spacing: 0.2px;
}
.logout-btn:hover {
  background: rgba(239,68,68,0.5) !important;
}

/* ── PDF Bar ──────────────────────────────────────────────────────────────── */
.pdf-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: #f5f3ff;
  border-bottom: 1px solid #e0d9ff;
  flex-shrink: 0;
}
body.dark .pdf-bar {
  background: #18184a;
  border-bottom-color: #2e2e70;
}

.pdf-label {
  background: linear-gradient(135deg, #5b35e8, #2563eb);
  color: #fff;
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
  flex-shrink: 0;
}
.pdf-label:hover { opacity: 0.85; }

.pdf-status {
  font-size: 12px;
  color: #777;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
body.dark .pdf-status { color: #999; }

.pdf-clear-btn {
  background: transparent;
  border: 1px solid #ddd;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  font-size: 11px;
  cursor: pointer;
  color: #999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}
.pdf-clear-btn:hover { background: #fee2e2; border-color: #ef4444; color: #ef4444; }

/* ── Chat Box ─────────────────────────────────────────────────────────────── */
.chat-box {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

/* scrollbar */
.chat-box::-webkit-scrollbar { width: 5px; }
.chat-box::-webkit-scrollbar-track { background: transparent; }
.chat-box::-webkit-scrollbar-thumb { background: #d0c9ff; border-radius: 10px; }
body.dark .chat-box::-webkit-scrollbar-thumb { background: #3b3b80; }

/* ── Messages ─────────────────────────────────────────────────────────────── */
.message-wrapper {
  display: flex;
  flex-direction: column;
  max-width: 82%;
}
.user-wrapper { align-self: flex-end; align-items: flex-end; }
.bot-wrapper  { align-self: flex-start; align-items: flex-start; }

.message {
  padding: 10px 14px;
  border-radius: 18px;
  line-height: 1.55;
  font-size: 14px;
  word-break: break-word;
}
.message.user {
  background: linear-gradient(135deg, #5b35e8, #2563eb);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.message.bot {
  background: #f0edff;
  color: #1a1a3e;
  border-bottom-left-radius: 4px;
}
body.dark .message.bot {
  background: #1e1e58;
  color: #e0e0ff;
}

/* ── Markdown ─────────────────────────────────────────────────────────────── */
.markdown-body p { margin-bottom: 0.5em; }
.markdown-body p:last-child { margin-bottom: 0; }
.markdown-body ul, .markdown-body ol { padding-left: 1.4em; margin-bottom: 0.5em; }
.markdown-body li { margin-bottom: 0.2em; }
.markdown-body strong { font-weight: 700; }
.markdown-body em { font-style: italic; }
.markdown-body code {
  background: rgba(0,0,0,0.08);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 12px;
  font-family: "Courier New", monospace;
}
body.dark .markdown-body code { background: rgba(255,255,255,0.1); }
.markdown-body pre {
  background: rgba(0,0,0,0.08);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
  margin: 6px 0;
}
body.dark .markdown-body pre { background: rgba(255,255,255,0.07); }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  margin: 0.4em 0 0.2em; font-weight: 700;
}
.markdown-body blockquote {
  border-left: 3px solid #5b35e8;
  padding-left: 10px;
  color: #555;
  margin: 6px 0;
}
body.dark .markdown-body blockquote { color: #aaa; }
.markdown-body table { border-collapse: collapse; width: 100%; margin: 8px 0; font-size: 13px; }
.markdown-body th, .markdown-body td { border: 1px solid #ddd; padding: 6px 10px; }
.markdown-body th { background: rgba(91,53,232,0.1); font-weight: 700; }
body.dark .markdown-body th { background: rgba(91,53,232,0.2); }
body.dark .markdown-body th, body.dark .markdown-body td { border-color: #3b3b80; }

/* ── Timestamp ────────────────────────────────────────────────────────────── */
.timestamp {
  font-size: 10px;
  color: #bbb;
  margin-top: 3px;
  padding: 0 4px;
}

/* ── System Note ──────────────────────────────────────────────────────────── */
.system-note {
  align-self: center;
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  border-radius: 10px;
  padding: 6px 14px;
  font-size: 12px;
  text-align: center;
  max-width: 92%;
}
body.dark .system-note {
  background: #2d2200;
  border-color: #78350f;
  color: #fcd34d;
}

/* ── Action Buttons ───────────────────────────────────────────────────────── */
.msg-actions {
  display: flex;
  gap: 5px;
  margin-top: 4px;
  padding: 0 2px;
}
.action-btn {
  background: transparent;
  border: 1px solid #e0d9ff;
  border-radius: 10px;
  padding: 3px 9px;
  font-size: 11px;
  cursor: pointer;
  color: #666;
  transition: background 0.2s, border-color 0.2s;
}
.action-btn:hover { background: #f0edff; border-color: #c4b5ff; color: #5b35e8; }
body.dark .action-btn { border-color: #3b3b80; color: #aaa; }
body.dark .action-btn:hover { background: #1e1e58; color: #c4b5ff; }

.error-msg {
  color: #ef4444 !important;
  background: #fee2e2 !important;
  border: 1px solid #fca5a5;
}
body.dark .error-msg { background: #3b0a0a !important; border-color: #7f1d1d; }

/* ── Chips ────────────────────────────────────────────────────────────────── */
.chips-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 12px;
  border-top: 1px solid #e8e4ff;
  background: #faf8ff;
  flex-shrink: 0;
}
body.dark .chips-bar { background: #14143e; border-top-color: #2e2e70; }

.chip {
  background: #ede9ff;
  border: 1px solid #c4b5ff;
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  color: #5b35e8;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}
.chip:hover { background: #d8d0ff; transform: translateY(-1px); }
body.dark .chip { background: #1e1e58; border-color: #4a3aa0; color: #c4b5ff; }
body.dark .chip:hover { background: #28285e; }

/* ── Typing dots ──────────────────────────────────────────────────────────── */
.dot-typing {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 2px;
}
.dot-typing span {
  width: 8px; height: 8px;
  background: #5b35e8;
  border-radius: 50%;
  animation: bounce 1.2s infinite ease-in-out;
}
.dot-typing span:nth-child(1) { animation-delay: 0s; }
.dot-typing span:nth-child(2) { animation-delay: 0.2s; }
.dot-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%,80%,100% { transform: scale(0.6); opacity: 0.4; }
  40%          { transform: scale(1);   opacity: 1; }
}

/* ── Input Area ───────────────────────────────────────────────────────────── */
.input-area {
  display: flex;
  padding: 10px 12px;
  gap: 8px;
  border-top: 1px solid #e8e4ff;
  background: #fff;
  flex-shrink: 0;
  align-items: center;
}
body.dark .input-area { background: #10103a; border-top-color: #2e2e70; }

.input-area input {
  flex: 1;
  padding: 10px 16px;
  border: 1.5px solid #d0c9ff;
  border-radius: 24px;
  font-size: 14px;
  outline: none;
  background: #f8f6ff;
  color: #1a1a3e;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input-area input:focus {
  border-color: #5b35e8;
  box-shadow: 0 0 0 3px rgba(91,53,232,0.12);
}
body.dark .input-area input {
  background: #1e1e58;
  border-color: #3b3b80;
  color: #e0e0ff;
}
body.dark .input-area input::placeholder { color: #6666aa; }

#sendBtn {
  width: 42px;
  height: 42px;
  padding: 0;
  background: linear-gradient(135deg, #5b35e8, #2563eb);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
#sendBtn:hover { opacity: 0.88; transform: scale(1.06); }
#sendBtn:active { transform: scale(0.96); }

/* ══════════════════════════════════════════════════════════
   AUTH PAGE  (login.html)
══════════════════════════════════════════════════════════ */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #6c47ff22, #3b82f622), #f0f4ff;
}
.auth-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 8px 40px rgba(80,60,180,0.18);
  padding: 36px 32px 28px;
  width: 380px;
  max-width: 94vw;
}
.auth-header { text-align: center; margin-bottom: 24px; }
.auth-logo   { font-size: 48px; line-height: 1; margin-bottom: 8px; }
.auth-header h1 { font-size: 22px; font-weight: 700; color: #1a1a3e; margin-bottom: 4px; }
.auth-subtitle  { font-size: 13px; color: #888; }

.auth-tabs { display: flex; gap: 0; border-radius: 12px; overflow: hidden;
             border: 1.5px solid #e0d9ff; margin-bottom: 22px; }
.auth-tab  { flex: 1; padding: 9px; font-size: 14px; font-weight: 600;
             background: transparent; border: none; cursor: pointer; color: #888;
             transition: background 0.2s, color 0.2s; }
.auth-tab.active { background: linear-gradient(135deg, #5b35e8, #2563eb); color: #fff; }

.form-group       { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600;
                    color: #555; margin-bottom: 5px; }
.form-group input {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid #d0c9ff; border-radius: 12px;
  font-size: 14px; outline: none; background: #f8f6ff; color: #1a1a3e;
  transition: border-color 0.2s;
}
.form-group input:focus { border-color: #5b35e8; }

.auth-btn {
  width: 100%; padding: 12px;
  background: linear-gradient(135deg, #5b35e8, #2563eb);
  color: #fff; border: none; border-radius: 12px;
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: opacity 0.2s; margin-top: 4px;
}
.auth-btn:hover    { opacity: 0.88; }
.auth-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.auth-error   { background: #fee2e2; border: 1px solid #fca5a5; color: #b91c1c;
                border-radius: 10px; padding: 8px 12px; font-size: 12px; margin-bottom: 12px; }
.auth-success { background: #dcfce7; border: 1px solid #86efac; color: #166534;
                border-radius: 10px; padding: 8px 12px; font-size: 12px; margin-bottom: 12px; }
.auth-switch  { text-align: center; font-size: 12px; color: #888; margin-top: 14px; }
.auth-switch a { color: #5b35e8; text-decoration: none; font-weight: 600; }