* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #F5F7FA;
  color: #0A2540;
  display: flex;
  flex-direction: column;
  height: calc(var(--vh, 1vh) * 100);
  overflow: hidden;
}

.login-page {
  align-items: center;
  justify-content: center;
}
.login-box {
  background: #fff;
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  width: 90%;
  max-width: 320px;
  text-align: center;
}
.login-box h1 { margin: 0; font-size: 2rem; color: #0A2540; }
.subtitle { color: #667085; margin-top: 0.25rem; margin-bottom: 1.5rem; }
.login-box input {
  display: block;
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
  border: 1px solid #D0D5DD;
  border-radius: 8px;
  font-size: 1rem;
}
.login-box button {
  width: 100%;
  padding: 0.75rem;
  background: #0A2540;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}
.error { color: #EF4444; font-size: 0.9rem; }

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: #0A2540;
  color: #fff;
}
.chat-header .logo { font-weight: 700; font-size: 1.25rem; letter-spacing: 0.05em; }
.header-actions { display: flex; gap: 0.5rem; align-items: center; }
.header-actions button {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
}
#speakToggle {
  padding: 0.4rem 0.6rem;
  font-size: 1rem;
}
#voiceSelect {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 6px;
  padding: 0.35rem 0.4rem;
  font-size: 0.8rem;
  max-width: 8rem;
}
#voiceSelect option {
  color: #0A2540;
  background: #fff;
}
#wakeToggle.active {
  background: #10B981;
  animation: pulse 1s infinite;
}
.wake-banner {
  background: #10B981;
  color: #fff;
  text-align: center;
  padding: 0.4rem;
  font-size: 0.85rem;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(239,68,68,0.5); }
  70% { box-shadow: 0 0 0 8px rgba(239,68,68,0); }
  100% { box-shadow: 0 0 0 0 rgba(239,68,68,0); }
}

.chat-window {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.bubble {
  max-width: 80%;
  padding: 0.65rem 0.9rem;
  border-radius: 14px;
  line-height: 1.4;
  white-space: pre-wrap;
}
.bubble.user {
  align-self: flex-end;
  background: #0A2540;
  color: #fff;
  border-bottom-right-radius: 4px;
}
.bubble.sam {
  align-self: flex-start;
  background: #fff;
  border: 1px solid #E4E7EC;
  border-bottom-left-radius: 4px;
}
.bubble.thinking { color: #98A2B3; font-style: italic; }

.chat-input {
  display: flex;
  padding: 0.6rem;
  gap: 0.4rem;
  background: #fff;
  border-top: 1px solid #E4E7EC;
  align-items: center;
}
.chat-input input {
  flex: 1;
  min-width: 0;
  padding: 0.65rem 0.7rem;
  border: 1px solid #D0D5DD;
  border-radius: 8px;
  font-size: 1rem;
}
.chat-input button {
  flex-shrink: 0;
  padding: 0.65rem 1rem;
  background: #0A2540;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}