* {
  box-sizing: border-box;
}

.app-shell {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}

.header-main {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding-bottom: 0.25rem;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.header-logo {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: flex-start;
}

.header-actions {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-left: auto;
}

.header-link {
  color: var(--link);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.header-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
  width: 100%;
}

.header-title {
  font-size: clamp(2.25rem, 3vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}

.header-logo img {
  height: 64px;
  object-fit: contain;
  margin: 0;
}

.form-card {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.6);
}

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.progress-label {
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
}

.progress-note {
  color: var(--muted);
  font-size: 0.85rem;
}

.progress-track {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background-color: var(--progress-track);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background-color: var(--progress-fill);
  transition: width 0.3s ease;
}

.question-card {
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.5rem;
  background-color: var(--panel);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.question-title {
  font-size: 1.25rem;
  font-weight: 800;
}

.error-pill {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background-color: rgba(248, 113, 113, 0.15);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #fca5a5;
}

.question-help {
  color: var(--muted);
  font-size: 0.9rem;
}

.option-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.option-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background-color: var(--panel);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.option-card:hover {
  border-color: var(--progress-fill);
  background-color: rgba(15, 23, 42, 0.65);
}

.option-card input[type="radio"] {
  margin-top: 0.35rem;
}

.option-card span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--page-text);
}

.error-text {
  color: #fecdd3;
  font-size: 0.85rem;
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-end;
  align-items: center;
}

.form-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.form-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.border {
  border-width: 1px;
  border-style: solid;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-action:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.result-card {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.6);
  margin: 0 auto;
  width: 100%;
  max-width: 960px;
}

.result-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: flex-start;
}

.result-logo {
  height: 68px;
  object-fit: contain;
}

.result-reference {
  font-size: 0.85rem;
  color: var(--muted);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  justify-content: flex-start;
}

.result-card .prose h1 {
  font-size: clamp(2.06rem, 3vw, 2.81rem);
}

.result-card .prose h2 {
  font-size: clamp(1.39rem, 2.25vw, 1.73rem);
}

.result-card .prose h3 {
  font-size: clamp(1.01rem, 1.8vw, 1.43rem);
}

.result-actions .btn-primary {
  background-color: #22c55e;
  color: #0f172a;
  box-shadow: 0 15px 30px rgba(34, 197, 94, 0.25);
}

.result-actions .btn-secondary {
  border-color: rgba(148, 163, 184, 0.4);
}

.btn-underline {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.preview-card {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 1.75rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.3);
}

.preview-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.preview-card-title {
  margin: 0;
  font-size: clamp(1.75rem, 3vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.preview-note {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.preview-dropdown {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.75rem 1.25rem;
  background-color: rgba(148, 163, 184, 0.08);
}

.select-route {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 0.65rem 1.25rem;
  color: var(--page-text);
  font-size: 0.95rem;
  appearance: none;
  min-width: 180px;
}

.preview-dropdown-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.preview-timestamp {
  color: var(--muted);
  font-size: 0.75rem;
  margin-left: auto;
}

.prose ul,
.prose ol {
  padding-left: 1.5rem;
  margin-top: 0.6rem;
  margin-bottom: 0.6rem;
  list-style-position: outside;
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose li {
  margin-top: 0.35rem;
  line-height: 1.6;
}

.prose li::marker {
  font-weight: 700;
  color: var(--page-text);
}

.theme-toggle-floating {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 40;
}

.theme-toggle-floating button {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

@media (max-width: 640px) {
  .header-top {
    flex-direction: column;
  }
  .actions-row {
    justify-content: center;
  }
}