/* ===== NAVBAR ===== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-logo {
  width: 32px;
  height: 32px;
}

.navbar-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.navbar-title span {
  color: var(--color-accent);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.navbar-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.navbar-link:hover {
  color: var(--color-accent);
}

.btn-history-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  transition: background 0.2s, color 0.2s;
}

.btn-history-toggle:hover {
  background: var(--bg-elevated);
  color: var(--color-accent);
}

/* ===== MAIN LAYOUT ===== */
.app-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
  min-height: calc(100vh - 60px - 80px);
}

.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

/* ===== PANEL ENTRADA ===== */
.panel-input {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel-input h2 {
  font-size: 1.125rem;
  color: var(--color-primary);
}

/* ===== PANEL RESULTADO ===== */
.panel-result {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
  max-height: calc(100vh - 140px);
}

.result-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-tertiary);
  gap: 1rem;
  flex: 1;
}

.result-placeholder svg {
  width: 64px;
  height: 64px;
  opacity: 0.4;
}

.result-placeholder p {
  font-size: 0.925rem;
  max-width: 280px;
}

/* ===== HISTORY PANEL ===== */
.history-panel {
  max-width: 1280px;
  margin: 0 auto 1.5rem;
  padding: 0 1.5rem;
}

.history-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: none;
}

.history-wrapper.open {
  display: block;
}

/* ===== FOOTER ===== */
.app-footer {
  text-align: center;
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

.footer-brand {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  margin-top: 0.5rem;
}

.footer-brand a {
  color: var(--color-accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .app-main {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }

  .panel-result {
    max-height: none;
  }

  .navbar {
    padding: 0.75rem 1rem;
  }

  .navbar-actions {
    gap: 0.5rem;
  }

  .navbar-link.hide-mobile {
    display: none;
  }
}