:root {
  color-scheme: dark;
  --qi-bg: #06070a;
  --qi-bg-elevated: #0c0e14;
  --qi-panel: rgba(18, 20, 28, 0.72);
  --qi-glass: rgba(255, 255, 255, 0.03);
  --qi-border: rgba(255, 255, 255, 0.09);
  --qi-border-strong: rgba(110, 139, 255, 0.28);
  --qi-text: #f2f4f8;
  --qi-muted: #8b93a3;
  --qi-accent: #6e8bff;
  --qi-accent-glow: rgba(110, 139, 255, 0.35);
  --qi-accent-soft: rgba(110, 139, 255, 0.12);
  --qi-user: linear-gradient(135deg, rgba(42, 54, 88, 0.95), rgba(28, 34, 52, 0.95));
  --qi-assistant: rgba(16, 18, 26, 0.92);
  --qi-radius: 16px;
  --qi-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  font-family: "Inter Tight", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-feature-settings: "ss01" on, "cv01" on;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--qi-bg);
  color: var(--qi-text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(110, 139, 255, 0.14), transparent 60%),
    radial-gradient(700px 400px at 90% 0%, rgba(90, 200, 250, 0.06), transparent 55%);
  z-index: 0;
}

.qi-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.qi-nav {
  border-right: 1px solid var(--qi-border);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  background: rgba(8, 9, 12, 0.82);
  backdrop-filter: blur(20px);
}

.qi-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 15px;
}

.qi-nav-links { display: flex; flex-direction: column; gap: 6px; }

.qi-nav-links a {
  display: block;
  padding: 11px 14px;
  border-radius: 12px;
  color: var(--qi-muted);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.qi-nav-links a.active,
.qi-nav-links a:hover {
  background: var(--qi-accent-soft);
  color: var(--qi-text);
  box-shadow: inset 0 0 0 1px rgba(110, 139, 255, 0.12);
}

.qi-nav-foot { margin-top: auto; font-size: 12px; }
.qi-link-muted { color: var(--qi-muted); text-decoration: none; }

.qi-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.qi-header {
  padding: 28px 32px 14px;
  border-bottom: 1px solid var(--qi-border);
  backdrop-filter: blur(12px);
}

.qi-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.qi-header h1 {
  margin: 0 0 8px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.qi-header p {
  margin: 0;
  color: var(--qi-muted);
  font-size: 13px;
  line-height: 1.5;
}

.qi-latency {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qi-muted);
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--qi-border);
  background: var(--qi-glass);
  white-space: nowrap;
}

.qi-latency.qi-fast { color: #7dffb2; border-color: rgba(125, 255, 178, 0.25); }

.qi-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0 32px 28px;
}

.qi-hidden { display: none !important; }

.qi-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  scroll-behavior: smooth;
}

.qi-msg {
  max-width: min(860px, 100%);
  padding: 16px 18px;
  border-radius: var(--qi-radius);
  border: 1px solid var(--qi-border);
  line-height: 1.6;
  font-size: 14px;
  animation: qi-fade-in 0.28s ease;
}

.qi-msg.user {
  background: var(--qi-user);
  align-self: flex-end;
  box-shadow: var(--qi-shadow);
}

.qi-msg.assistant {
  background: var(--qi-assistant);
  align-self: flex-start;
  backdrop-filter: blur(16px);
}

.qi-msg.thinking {
  opacity: 0.85;
  border-style: dashed;
}

.qi-msg .qi-meta {
  font-size: 10px;
  color: var(--qi-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.qi-phase-grid {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.qi-phase-card {
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--qi-glass);
  border: 1px solid var(--qi-border);
}

.qi-phase-card strong {
  display: block;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qi-accent);
  margin-bottom: 6px;
}

.qi-phase-card span {
  color: var(--qi-text);
  font-size: 13px;
  line-height: 1.55;
}

.qi-phase-skeleton {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.qi-phase-skeleton div {
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(90deg, rgba(255,255,255,0.03), rgba(255,255,255,0.07), rgba(255,255,255,0.03));
  background-size: 200% 100%;
  animation: qi-shimmer 1.2s ease-in-out infinite;
}

.qi-composer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--qi-border);
  padding-top: 18px;
}

.qi-composer textarea {
  width: 100%;
  resize: vertical;
  min-height: 58px;
  border-radius: 14px;
  border: 1px solid var(--qi-border);
  background: var(--qi-panel);
  color: var(--qi-text);
  padding: 14px 16px;
  font: inherit;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.qi-composer textarea:focus {
  outline: none;
  border-color: var(--qi-border-strong);
  box-shadow: 0 0 0 4px rgba(110, 139, 255, 0.12);
}

.qi-composer-actions { display: flex; gap: 10px; }

.qi-btn {
  border-radius: 12px;
  border: 1px solid var(--qi-border);
  padding: 11px 18px;
  font: inherit;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.qi-btn:active { transform: scale(0.98); }

.qi-btn-primary {
  background: linear-gradient(180deg, rgba(110, 139, 255, 0.24), rgba(110, 139, 255, 0.12));
  border-color: var(--qi-border-strong);
  color: var(--qi-text);
  box-shadow: 0 8px 24px rgba(110, 139, 255, 0.12);
}

.qi-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.qi-btn-ghost { background: transparent; color: var(--qi-muted); }

.qi-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
}

.qi-chip {
  border: 1px solid var(--qi-border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--qi-muted);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.qi-chip:hover {
  color: var(--qi-text);
  border-color: var(--qi-border-strong);
  background: var(--qi-accent-soft);
}

.qi-list { padding: 24px 0; display: flex; flex-direction: column; gap: 12px; }

.qi-card {
  border: 1px solid var(--qi-border);
  border-radius: 14px;
  padding: 16px 18px;
  background: var(--qi-panel);
  backdrop-filter: blur(12px);
  transition: border-color 0.18s ease;
}

.qi-card:hover { border-color: var(--qi-border-strong); }

.qi-card h3 { margin: 0 0 8px; font-size: 14px; font-weight: 600; }
.qi-card p { margin: 0; color: var(--qi-muted); font-size: 13px; line-height: 1.55; }
.qi-card time { display: block; margin-top: 10px; font-size: 11px; color: var(--qi-muted); }

.qi-empty { color: var(--qi-muted); font-size: 14px; padding: 28px 0; }

@keyframes qi-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes qi-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (max-width: 860px) {
  .qi-shell { grid-template-columns: 1fr; }
  .qi-nav { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .qi-nav-links { flex-direction: row; flex-wrap: wrap; }
  .qi-nav-foot { margin-top: 0; width: 100%; }
  .qi-panel, .qi-header { padding-left: 18px; padding-right: 18px; }
}