:root {
  --navy: #1B2A4A;
  --brand: #1E6E91;
  --slate: #64748B;
  --accent: #1E6E91;
  --accent-hover: #175A78;
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --border: #E2E8F0;
  --danger: #B91C1C;
}

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

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-50);
  color: var(--navy);
  line-height: 1.6;
  min-height: 100vh;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--brand);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
}

.logo img {
  height: 28px;
  width: auto;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.nav-links a,
.nav-links button {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-links a.is-active,
.nav-links a:hover,
.nav-links button:hover {
  color: var(--navy);
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.auth-page {
  max-width: 440px;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

h1 {
  font-size: 1.75rem;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.lede {
  color: var(--slate);
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="file"],
textarea {
  width: 100%;
  margin-bottom: 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  color: var(--navy);
  background: var(--white);
}

textarea {
  min-height: 110px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--navy);
}

.muted {
  color: var(--slate);
  font-size: 0.9375rem;
}

.error {
  display: none;
  color: var(--danger);
  font-weight: 500;
  margin-bottom: 1rem;
}

.error.is-visible {
  display: block;
}

.success {
  display: none;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.success.is-visible {
  display: block;
}

.stack {
  display: grid;
  gap: 1rem;
}

.doc-row,
.question-row,
.result-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  background: var(--white);
}

.doc-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.status {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status.ready { color: #047857; }
.status.processing { color: #B45309; }
.status.failed { color: var(--danger); }

.citation {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  background: var(--gray-50);
  border-radius: 0 8px 8px 0;
  margin-top: 0.75rem;
}

.citation strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.invite-box {
  font-size: 0.9375rem;
  background: var(--gray-50);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-top: 1rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
}