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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #232733;
  --border: #2d3148;
  --text: #e4e6f0;
  --text2: #8b8fa3;
  --accent: #6c72cb;
  --accent2: #818cf8;
  --green: #34d399;
  --red: #f87171;
  --yellow: #fbbf24;
  --radius: 10px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Layout ───────────────────────────────────────────── */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-logo {
  padding: 20px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo span { color: var(--accent2); }

.sidebar-nav { flex: 1; padding: 12px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text2);
  font-size: 14px;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.nav-item:hover { background: var(--surface2); color: var(--text); }
.nav-item.active { background: var(--accent); color: white; }
.nav-item .icon { width: 20px; text-align: center; }

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text2);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius);
  cursor: pointer;
}

.sidebar-user:hover { background: var(--surface2); }

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: white;
}

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

.topbar {
  height: 56px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  justify-content: space-between;
  background: var(--surface);
}

.topbar-title { font-size: 16px; font-weight: 600; }

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

/* ── Auth Page ────────────────────────────────────────── */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.auth-card h2 {
  text-align: center;
  margin-bottom: 8px;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--text2);
  font-size: 14px;
  margin-bottom: 28px;
}

/* ── Forms ─────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
}

.form-input:focus { border-color: var(--accent2); }

select.form-input { cursor: pointer; }

textarea.form-input { resize: vertical; min-height: 80px; font-family: inherit; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--accent2); }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) { background: var(--surface2); }

.btn-danger { background: var(--red); color: white; }
.btn-danger:hover:not(:disabled) { opacity: 0.85; }

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
}

/* ── Cards & Tables ────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent2);
}

.stat-label {
  font-size: 13px;
  color: var(--text2);
  margin-top: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

th {
  color: var(--text2);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
}

tr:hover td { background: var(--surface2); }

/* ── Badge ─────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
}

.badge-green { background: rgba(52, 211, 153, 0.15); color: var(--green); }
.badge-yellow { background: rgba(251, 191, 36, 0.15); color: var(--yellow); }
.badge-red { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.badge-blue { background: rgba(129, 140, 248, 0.15); color: var(--accent2); }

/* ── Chat ──────────────────────────────────────────────── */
.chat-layout {
  display: flex;
  height: calc(100vh - 56px);
  min-height: 0;
}

.chat-sessions {
  width: 260px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat-sessions-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chat-sessions-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-session-item {
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-bottom: 4px;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
  position: relative;
}

.chat-session-item:hover { background: var(--surface2); }

.chat-session-item.active {
  background: var(--surface2);
  border-color: var(--accent2);
}

.chat-session-item-title {
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 3px;
}

.chat-session-item-meta {
  font-size: 11px;
  color: var(--text2);
  display: flex;
  gap: 6px;
  align-items: center;
}

.chat-sessions-empty {
  padding: 20px 12px;
  text-align: center;
  font-size: 12px;
  color: var(--text2);
}

.chat-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.chat-toolbar {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--surface);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.chat-msg {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  max-width: 80%;
}

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

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

.chat-msg.assistant .chat-msg-avatar { background: var(--accent); color: white; }
.chat-msg.user .chat-msg-avatar { background: var(--surface2); }

.chat-msg-body {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.6;
}

.chat-msg.assistant .chat-msg-body { background: var(--surface); border: 1px solid var(--border); }
.chat-msg.user .chat-msg-body { background: var(--accent); color: white; }

.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  gap: 10px;
  align-items: center;
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.chat-input:focus { border-color: var(--accent2); }

/* ── Voice btn ─────────────────────────────────────────── */
.btn-voice { font-size: 18px; }
.btn-voice.recording {
  background: var(--red);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* ── Toast ─────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  animation: slideIn 0.3s ease;
  min-width: 280px;
}

.toast-success { background: var(--green); color: #000; }
.toast-error { background: var(--red); color: white; }
.toast-info { background: var(--accent); color: white; }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } }

/* ── Loading ───────────────────────────────────────────── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-page {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--text2);
  gap: 10px;
}

/* ── Empty state ───────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text2);
}

.empty-state .icon { font-size: 48px; margin-bottom: 16px; }

/* ── Modal ─────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ── Tabs ──────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.tab {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text2);
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent2); border-bottom-color: var(--accent2); }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .nav-text, .sidebar-logo span, .sidebar-footer { display: none; }
  .sidebar-user .user-info { display: none; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ── File upload area ──────────────────────────────────── */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text2);
}

.upload-area:hover { border-color: var(--accent2); color: var(--text); }
.upload-area.dragover { border-color: var(--accent2); background: rgba(129, 140, 248, 0.05); }

/* ── Audio player ──────────────────────────────────────── */
audio {
  width: 100%;
  height: 36px;
  margin-top: 8px;
  border-radius: var(--radius);
}