:root {
  --lvmb-bg: #f6f8fb;
  --lvmb-surface: #ffffff;
  --lvmb-surface-soft: #fbfdff;
  --lvmb-border: #e3e8ef;
  --lvmb-border-strong: #d4dbe6;
  --lvmb-text: #162233;
  --lvmb-text-soft: #526173;
  --lvmb-title: #102033;
  --lvmb-primary: #16324f;
  --lvmb-primary-hover: #1d4268;
  --lvmb-caution-bg: #fffaf3;
  --lvmb-caution-border: #f6d39f;
  --lvmb-success-bg: #ecfdf3;
  --lvmb-success-border: #abefc6;
  --lvmb-success-text: #067647;
  --lvmb-error-bg: #fff4f4;
  --lvmb-error-border: #fecdca;
  --lvmb-error-text: #b42318;
  --lvmb-shadow: 0 12px 32px rgba(16, 24, 40, 0.06);
  --lvmb-radius: 16px;
}

.lvmb-app-shell {
  background: var(--lvmb-bg);
  padding: 20px;
  border-radius: 20px;
}

.lvmb-app-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.lvmb-app-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5f6f82;
  margin-bottom: 6px;
}

.lvmb-app-title {
  margin: 0 0 8px;
  color: var(--lvmb-title);
  font-size: 32px;
  line-height: 1.1;
}

.lvmb-app-subtitle {
  margin: 0;
  max-width: 780px;
  color: var(--lvmb-text-soft);
  font-size: 15px;
}

.lvmb-app-header-right {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.lvmb-tier-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--lvmb-border-strong);
  background: var(--lvmb-surface);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  color: var(--lvmb-primary);
}

.lvmb-tier-badge-guest {
  color: #6a7688;
}

.lvmb-link-button {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--lvmb-border-strong);
  background: var(--lvmb-surface);
  color: var(--lvmb-primary);
  text-decoration: none;
  font-weight: 600;
}

.lvmb-link-button:hover {
  background: #f7f9fc;
}

.lvmb-app-main {
  display: grid;
  grid-template-columns: minmax(320px, 460px) minmax(360px, 1fr);
  gap: 20px;
  align-items: start;
}

.lvmb-app-main-single {
  grid-template-columns: minmax(320px, 420px) minmax(420px, 1fr);
}

.lvmb-builder-column,
.lvmb-result-column {
  min-width: 0;
}

.lvmb-panel {
  background: var(--lvmb-surface);
  border: 1px solid var(--lvmb-border);
  border-radius: var(--lvmb-radius);
  padding: 20px;
  box-shadow: var(--lvmb-shadow);
  margin-bottom: 16px;
}

.lvmb-panel-highlight {
  background: linear-gradient(180deg, #fbfdff 0%, #f6faff 100%);
}

.lvmb-panel-caution {
  background: var(--lvmb-caution-bg);
  border-color: var(--lvmb-caution-border);
}

.lvmb-panel-footer {
  background: #fbfcfe;
}

.lvmb-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.lvmb-panel h2,
.lvmb-panel h3,
.lvmb-panel h4 {
  margin: 0 0 8px;
  color: var(--lvmb-title);
}

.lvmb-step-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #708197;
  margin-bottom: 8px;
}

.lvmb-grid {
  display: grid;
  gap: 16px;
}

.lvmb-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lvmb-field {
  display: flex;
  flex-direction: column;
}

.lvmb-field label {
  font-weight: 700;
  margin-bottom: 6px;
  color: #23354b;
}

.lvmb-required {
  color: #b42318;
}

.lvmb-field input[type="text"],
.lvmb-field input[type="email"],
.lvmb-field select,
.lvmb-field textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 13px;
  border-radius: 12px;
  border: 1px solid #ccd6e3;
  background: #fff;
  color: var(--lvmb-text);
  font-size: 15px;
}

.lvmb-field input:focus,
.lvmb-field select:focus,
.lvmb-field textarea:focus {
  outline: none;
  border-color: #6f92b8;
  box-shadow: 0 0 0 4px rgba(22, 50, 79, 0.08);
}

.lvmb-field.is-invalid input,
.lvmb-field.is-invalid select,
.lvmb-field.is-invalid textarea {
  border-color: #e45a5a;
  box-shadow: 0 0 0 4px rgba(180, 35, 24, 0.08);
}

.lvmb-help {
  margin-top: 6px;
  font-size: 13px;
  color: #66778b;
}

.lvmb-field-error {
  min-height: 18px;
  margin-top: 6px;
  font-size: 13px;
  color: var(--lvmb-error-text);
}

.lvmb-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lvmb-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--lvmb-border-strong);
  background: #fff;
  cursor: pointer;
  font-weight: 600;
  color: #304254;
}

.lvmb-pill input {
  margin: 0;
}

.lvmb-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
}

.lvmb-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--lvmb-primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

.lvmb-button:hover {
  background: var(--lvmb-primary-hover);
}

.lvmb-button-small {
  padding: 9px 13px;
  font-size: 13px;
}

.lvmb-button-secondary {
  background: #475467;
}

.lvmb-button-secondary:hover {
  background: #344054;
}

.lvmb-button[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
}

.lvmb-loading {
  display: none;
  font-size: 14px;
  color: #4e6074;
  font-weight: 600;
}

.lvmb-loading.is-visible {
  display: inline-block;
}

.lvmb-empty-state {
  background: var(--lvmb-surface);
  border: 1px dashed var(--lvmb-border-strong);
  border-radius: var(--lvmb-radius);
  padding: 34px 24px;
  text-align: center;
  color: var(--lvmb-text-soft);
  box-shadow: var(--lvmb-shadow);
}

.lvmb-empty-icon {
  font-size: 28px;
  margin-bottom: 10px;
  color: #73859b;
}

.lvmb-empty-state h3 {
  margin: 0 0 10px;
  color: var(--lvmb-title);
}

.lvmb-empty-state p {
  margin: 0 0 12px;
}

.lvmb-empty-state ul {
  display: inline-block;
  text-align: left;
  margin: 0;
  padding-left: 20px;
}

.lvmb-result-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lvmb-result-sticky-nav {
  position: sticky;
  top: 12px;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--lvmb-border);
  backdrop-filter: blur(6px);
  box-shadow: var(--lvmb-shadow);
}

.lvmb-result-sticky-nav a {
  text-decoration: none;
  color: var(--lvmb-primary);
  font-weight: 700;
  font-size: 13px;
  padding: 7px 10px;
  border-radius: 999px;
  background: #f5f8fc;
}

.lvmb-result-topbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.lvmb-result-kicker {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #71839a;
  font-weight: 700;
  margin-bottom: 6px;
}

.lvmb-result-title {
  margin: 0;
  font-size: 28px;
  line-height: 1.15;
}

.lvmb-confidence-badge {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.lvmb-confidence-high {
  background: #ecfdf3;
  color: #067647;
  border: 1px solid #abefc6;
}

.lvmb-confidence-medium {
  background: #fffaeb;
  color: #b54708;
  border: 1px solid #fedf89;
}

.lvmb-confidence-low {
  background: #fef3f2;
  color: #b42318;
  border: 1px solid #fecdca;
}

.lvmb-confidence-neutral {
  background: #f2f4f7;
  color: #344054;
  border: 1px solid #d0d5dd;
}

.lvmb-insight-box {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: #f8fbff;
  border: 1px solid #dce7f4;
}

.lvmb-inline-list,
.lvmb-list {
  margin: 0;
  padding-left: 20px;
}

.lvmb-inline-list li,
.lvmb-list li {
  margin-bottom: 8px;
}

.lvmb-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.lvmb-spec-grid,
.lvmb-optimization-grid,
.lvmb-method-card-grid {
  display: grid;
  gap: 12px;
}

.lvmb-spec-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lvmb-optimization-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lvmb-method-card-grid {
  grid-template-columns: 1fr;
}

.lvmb-spec-card,
.lvmb-optimization-card,
.lvmb-method-card {
  border: 1px solid var(--lvmb-border);
  border-radius: 14px;
  padding: 14px;
  background: #fff;
}

.lvmb-spec-label,
.lvmb-optimization-label {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6e7f95;
  margin-bottom: 8px;
}

.lvmb-spec-value,
.lvmb-optimization-value {
  color: var(--lvmb-text);
  line-height: 1.5;
}

.lvmb-refine-panel {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--lvmb-border);
}

.lvmb-refine-panel h4 {
  margin: 0 0 10px;
}

.lvmb-refine-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.lvmb-refine-button {
  border: 1px solid var(--lvmb-border-strong);
  background: #fff;
  color: var(--lvmb-primary);
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.lvmb-refine-button:hover {
  background: #f7f9fc;
}

.lvmb-save-export-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 16px;
  align-items: start;
}

.lvmb-account-note,
.lvmb-upgrade-note {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--lvmb-border);
  background: #fff;
  color: var(--lvmb-text-soft);
}

.lvmb-account-actions {
  margin-top: 10px;
}

.lvmb-email-capture-wrap {
  margin-top: 14px;
}

.lvmb-email-capture-wrap label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

.lvmb-export-email {
  width: 100%;
  max-width: 420px;
  box-sizing: border-box;
  padding: 11px 12px;
  border: 1px solid #ccd6e3;
  border-radius: 12px;
  margin-bottom: 10px;
}

.lvmb-export-message {
  margin-top: 12px;
}

.lvmb-success {
  background: var(--lvmb-success-bg);
  border: 1px solid var(--lvmb-success-border);
  color: var(--lvmb-success-text);
  border-radius: 10px;
  padding: 12px;
}

.lvmb-error {
  background: var(--lvmb-error-bg);
  border: 1px solid var(--lvmb-error-border);
  color: var(--lvmb-error-text);
  border-radius: 10px;
  padding: 12px;
  font-weight: 500;
}

.lvmb-method-card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 8px;
}

.lvmb-method-card-title {
  font-weight: 800;
  color: var(--lvmb-title);
  font-size: 17px;
}

.lvmb-method-card-badge {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  background: #f5f8fc;
  border: 1px solid var(--lvmb-border);
  color: var(--lvmb-primary);
  font-size: 12px;
  font-weight: 700;
}

.lvmb-method-card-mode {
  color: var(--lvmb-text);
  font-weight: 600;
  margin-bottom: 4px;
}

.lvmb-method-card-date {
  color: var(--lvmb-text-soft);
  font-size: 13px;
}

.lvmb-method-card-actions {
  margin-top: 12px;
}

#lvmb-response-area,
#lvmb-method-view {
  min-height: 180px;
}

@media (max-width: 1100px) {
  .lvmb-app-main,
  .lvmb-app-main-single,
  .lvmb-save-export-row,
  .lvmb-spec-grid,
  .lvmb-optimization-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 782px) {
  .lvmb-app-header,
  .lvmb-toolbar,
  .lvmb-result-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .lvmb-grid-2 {
    grid-template-columns: 1fr;
  }

  .lvmb-result-sticky-nav {
    position: static;
  }

  .lvmb-app-shell {
    padding: 14px;
  }

  .lvmb-app-title {
    font-size: 26px;
  }
}