.app-body {
  min-height: 100vh;
}

.app-shell-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2rem, 1240px);
  margin: 0 auto;
  padding: 1rem 0;
  background: rgba(11, 15, 25, 0.84);
  backdrop-filter: blur(18px);
}

.app-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.compact-button {
  min-height: 2.6rem;
  padding: 0.65rem 0.9rem;
}

.app-shell {
  width: min(100% - 2rem, 1240px);
  margin: 0 auto;
  padding: 3.5rem 0 5rem;
}

.app-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.32fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 2rem;
}

.app-intro h1 {
  max-width: 14ch;
  font-size: clamp(2.65rem, 6vw, 5rem);
}

.app-intro p {
  max-width: 44rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.app-status-card,
.generator-panel,
.output-panel,
.history-section {
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(17, 24, 39, 0.78);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.22);
}

.app-status-card {
  padding: 1rem;
}

.app-status-card strong,
.app-status-card span {
  display: block;
}

.app-status-card span {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.app-status-card.used {
  border-color: rgba(245, 158, 11, 0.42);
  background: rgba(245, 158, 11, 0.08);
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(20rem, 0.92fr) minmax(22rem, 1fr);
  gap: 1rem;
  align-items: start;
}

.generator-panel,
.output-panel,
.history-section {
  padding: 1.25rem;
}

.panel-heading {
  margin-bottom: 1.2rem;
}

.panel-heading h2 {
  font-size: clamp(1.65rem, 3vw, 2.3rem);
}

.field-group {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.field-group span {
  color: #dbeafe;
  font-size: 0.9rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.85rem 0.9rem;
  background: rgba(255, 255, 255, 0.055);
  color: var(--text);
  font: inherit;
  line-height: 1.4;
}

textarea {
  min-height: 12rem;
  resize: vertical;
}

select {
  cursor: pointer;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(59, 130, 246, 0.85);
  outline: 3px solid rgba(59, 130, 246, 0.2);
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.checkbox-field {
  align-content: center;
  grid-template-columns: auto 1fr;
  min-height: 4.55rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.8rem 0.9rem;
  background: rgba(255, 255, 255, 0.035);
}

.checkbox-field input {
  width: 1.05rem;
  height: 1.05rem;
  margin: 0.12rem 0 0;
  accent-color: var(--primary);
}

.form-actions,
.output-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.reply-output {
  min-height: 19rem;
  border: 1px solid rgba(34, 197, 94, 0.28);
  border-radius: 0.75rem;
  padding: 1.2rem;
  background:
    linear-gradient(180deg, rgba(34, 197, 94, 0.09), transparent 58%),
    rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 1.08rem;
  white-space: pre-wrap;
}

.reply-output p {
  margin: 0;
}

.insights-panel {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.035);
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.insight-card {
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.8rem;
  background: rgba(255, 255, 255, 0.035);
}

.insight-card strong,
.insight-card span {
  display: block;
}

.insight-card span {
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.locked-output {
  display: grid;
  gap: 0.8rem;
}

.locked-output strong {
  font-size: 1.25rem;
}

.limit-note {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.button[disabled] {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
}

.button.hidden {
  display: none;
}

.history-section {
  margin-top: 1rem;
}

.history-list {
  display: grid;
  gap: 0.75rem;
}

.history-item {
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
}

.history-item strong {
  display: block;
  margin-bottom: 0.35rem;
}

.history-item p,
.empty-history {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .app-intro,
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .app-intro {
    align-items: start;
  }
}

@media (max-width: 560px) {
  .app-shell-header,
  .app-shell {
    width: min(100% - 1rem, 1240px);
  }

  .app-shell-header {
    align-items: flex-start;
  }

  .app-header-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .app-header-actions .header-cta {
    display: none;
  }

  .app-shell {
    padding-top: 2.25rem;
  }

  .control-grid,
  .insights-grid,
  .form-actions,
  .output-actions {
    grid-template-columns: 1fr;
  }

  .form-actions .button,
  .output-actions .button {
    width: 100%;
  }
}