* { box-sizing: border-box; }

:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-soft: #f8faff;
  --border: #e3e8f3;
  --text: #111827;
  --muted: #667085;
  --primary: #4f46e5;
  --primary-strong: #4338ca;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: linear-gradient(180deg, #eef2ff 0%, var(--bg) 20%, var(--bg) 100%);
  color: var(--text);
}

.shell {
  max-width: 1220px;
  margin: 0 auto;
  padding: 20px;
}

.hidden { display: none !important; }

.cardSoft {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(17, 24, 39, 0.06);
}

.landing {
  display: grid;
  gap: 16px;
}

.landingTopbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
}

.landingActions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero {
  padding: 28px;
  background: radial-gradient(circle at top right, #eef2ff, #ffffff 55%);
}

.badge {
  display: inline-block;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  padding: 6px 10px;
  color: #3730a3;
  font-size: 12px;
  font-weight: 600;
  background: #eef2ff;
}

h1 {
  margin: 14px 0 8px;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  max-width: 740px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.btnPrimary,
.btnGhost,
.btnGhostSmall,
.navBtn {
  cursor: pointer;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid transparent;
}

.btnPrimary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  padding: 10px 14px;
}

.btnPrimary:hover {
  background: var(--primary-strong);
  border-color: var(--primary-strong);
}

.btnPrimary:disabled {
  opacity: .6;
  cursor: not-allowed;
}

.btnGhost,
.btnGhostSmall,
.navBtn {
  background: #fff;
  color: #344054;
  border-color: #d0d7e6;
}

.btnGhost { padding: 10px 14px; }
.btnGhostSmall,
.navBtn { padding: 8px 10px; font-size: 12px; }

.appLogo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid #cfd6e7;
}

.brandInline {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brandInline h2 {
  margin: 0;
  font-size: 20px;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 14px;
  padding: 14px;
  margin-bottom: 14px;
}

.topNav {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.topbarActions {
  text-align: right;
  display: grid;
  gap: 8px;
  justify-items: end;
}

.layout {
  display: grid;
  gap: 14px;
  grid-template-columns: 300px 1fr;
  margin-bottom: 14px;
}

.sidebar,
.workspace,
.accountPanel {
  padding: 16px;
}

.sidebarHead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.threadList {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  max-height: 460px;
  overflow-y: auto;
}

.threadList li {
  padding: 8px;
  border-radius: 8px;
  border: 1px solid transparent;
  color: #475467;
}

.threadList li:hover {
  border-color: #c7d2fe;
  background: #eef2ff;
}

.askHead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.topKWrap {
  display: flex;
  gap: 8px;
  align-items: center;
}

.topKWrap input { width: 82px; }

label {
  display: block;
  margin: 10px 0 4px;
  font-size: 12px;
  color: #64748b;
}

input,
textarea {
  width: 100%;
  border: 1px solid #d6deed;
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  padding: 10px;
}

.rowCompact { margin-top: 10px; }

.responseCard {
  margin-top: 8px;
  background: var(--surface-soft);
  border: 1px solid #dde5f3;
  border-radius: 10px;
  padding: 12px;
  min-height: 220px;
}

.responseContent h4,
.responseContent h5 { margin: 10px 0 6px; }

.responseContent p {
  margin: 8px 0;
  line-height: 1.6;
}

.responseContent ul {
  margin: 6px 0 10px 18px;
  padding: 0;
}

.sourcesWrap {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid #dde5f3;
}

.sourcesWrap h4 {
  margin: 0 0 8px;
  color: #475467;
  font-size: 14px;
}

.sourcesList {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.feedbackBox {
  margin-top: 12px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #c7d2fe;
  background: #eef2ff;
}

.feedbackActions {
  display: flex;
  gap: 8px;
  margin: 8px 0;
}

.accountGrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

.accountPanel h3 {
  margin: 0 0 10px;
}

.muted { color: var(--muted); }

.error {
  margin-top: 8px;
  color: #b42318;
  background: #fee4e2;
  border: 1px solid #fecdca;
  border-radius: 8px;
  padding: 10px;
}

@media (max-width: 1100px) {
  .topbar {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .topbarActions {
    justify-items: start;
    text-align: left;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .accountGrid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .shell { padding: 14px; }

  .landingTopbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .topNav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}