/* ======================================================
   BSE Express — Калькулятор импорта
   Дизайн-система на базе portal.css V4
   ====================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* === CSS Variables (V4 compatible) === */
:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F7F8FA;
  --bg-card: #FFFFFF;
  --text-primary: #0F1D32;
  --text-secondary: #374151;
  --text-tertiary: #6B7280;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --accent: #0F1D32;
  --accent-hover: #1a2d47;
  --accent-10: rgba(15, 29, 50, 0.06);
  --accent-text: #FFFFFF;

  --bg-status-success: rgba(34, 197, 94, 0.1);
  --bg-status-warning: rgba(245, 158, 11, 0.1);
  --bg-status-error: rgba(239, 68, 68, 0.1);
  --bg-status-info: rgba(59, 130, 246, 0.1);
  --text-status-success: #16A34A;
  --text-status-warning: #D97706;
  --text-status-error: #DC2626;
  --text-status-info: #2563EB;

  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
}

[data-theme="dark"] {
  --bg-primary: #0F1D32;
  --bg-secondary: #0A1628;
  --bg-card: #162540;
  --text-primary: #FFFFFF;
  --text-secondary: #D1D5DB;
  --text-tertiary: #9CA3AF;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --accent: #FFFFFF;
  --accent-hover: rgba(255, 255, 255, 0.85);
  --accent-10: rgba(255, 255, 255, 0.08);
  --accent-text: #0F1D32;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);
}

/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-secondary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}

/* === Layout === */
.calc-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

/* === Top Navigation Bar === */
.calc-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.calc-topbar__back {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.15s;
}

.calc-topbar__back:hover {
  color: var(--text-primary);
}

.calc-topbar__logo {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.5px;
}

.calc-topbar__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.calc-topbar__badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-status-info);
  background: var(--bg-status-info);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.calc-header {
  text-align: center;
  margin-bottom: 32px;
  position: relative;
}

/* === Theme Toggle === */
.theme-toggle {
  position: absolute;
  top: 0;
  right: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--accent-10);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

[data-theme="light"] .theme-icon--sun { display: none; }
[data-theme="light"] .theme-icon--moon { display: block; }
[data-theme="dark"] .theme-icon--sun { display: block; }
[data-theme="dark"] .theme-icon--moon { display: none; }

.calc-header__logo {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}

.calc-header__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.calc-header__subtitle {
  font-size: 15px;
  color: var(--text-tertiary);
}

/* === Stepper === */
.calc-stepper {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 28px;
  padding: 0 8px;
}

.calc-stepper__step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-tertiary);
  white-space: nowrap;
  cursor: default;
  transition: color 0.2s;
}

.calc-stepper__num {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
  transition: all 0.2s;
}

.calc-stepper__step--active {
  color: var(--accent);
}

.calc-stepper__step--active .calc-stepper__num {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-text);
}

.calc-stepper__step--completed {
  color: var(--text-status-success);
}

.calc-stepper__step--completed .calc-stepper__num {
  border-color: var(--text-status-success);
  background: var(--bg-status-success);
  color: var(--text-status-success);
}

.calc-stepper__line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 12px;
  min-width: 16px;
  transition: background 0.2s;
}

.calc-stepper__line--done {
  background: var(--text-status-success);
}

/* === Card (main container) === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

/* === Steps === */
.calc-step {
  display: none;
}

.calc-step.is-active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.calc-step__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.calc-step__desc {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

/* === Form === */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-label--required::after {
  content: ' *';
  color: var(--text-status-error);
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.15s, background-color 0.3s, color 0.3s;
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-10);
}

.form-input--error {
  border-color: var(--text-status-error);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.form-error {
  font-size: 12px;
  color: var(--text-status-error);
  margin-top: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-row--3 {
  grid-template-columns: 1fr 1fr 1fr;
}

/* === Option Cards === */
.calc-option-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.calc-option-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.calc-option-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.calc-opt {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-primary);
}

.calc-opt:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.calc-opt.is-selected {
  border-color: var(--accent);
  background: var(--accent-10);
}

.calc-opt__icon {
  font-size: 24px;
  margin-bottom: 8px;
}

.calc-opt__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.calc-opt__desc {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.3;
}

/* === TN VED Search (autocomplete) === */
.tn-ved-search {
  position: relative;
}

.tn-ved-search__results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-height: 340px;
  overflow-y: auto;
  display: none;
}

.tn-ved-search__results.is-open {
  display: block;
}

.tn-ved-search__item {
  padding: 10px 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

.tn-ved-search__item:last-child {
  border-bottom: none;
}

.tn-ved-search__item:hover {
  background: var(--accent-10);
}

.tn-ved-search__code {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.tn-ved-search__desc {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.tn-ved-search__rate {
  font-size: 11px;
  color: var(--text-status-info);
  margin-top: 2px;
}

.tn-ved-search__code-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tn-ved-search__group {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-status-info);
  background: var(--accent-10);
  padding: 1px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

/* === Navigation === */
.calc-nav {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--border-hover);
  background: var(--accent-10);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

/* === Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
}

.badge--info {
  background: var(--bg-status-info);
  color: var(--text-status-info);
}

.badge--success {
  background: var(--bg-status-success);
  color: var(--text-status-success);
}

.badge--warning {
  background: var(--bg-status-warning);
  color: var(--text-status-warning);
}

/* === Results (Step 4) === */
.calc-result {
  margin-bottom: 24px;
}

.calc-result__total {
  text-align: center;
  padding: 24px;
  background: var(--accent-10);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.calc-result__total-label {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.calc-result__total-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.calc-result__total-unit {
  font-size: 16px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Tax comparison tabs */
.calc-tax-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.calc-tax-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: var(--bg-primary);
  color: var(--text-tertiary);
  border: none;
  transition: all 0.15s;
}

.calc-tax-tab.is-active {
  background: var(--accent);
  color: var(--accent-text);
}

/* Cost breakdown table */
.calc-breakdown {
  width: 100%;
  border-collapse: collapse;
}

.calc-breakdown__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.calc-breakdown__row:last-child {
  border-bottom: none;
}

.calc-breakdown__row--total {
  font-weight: 600;
  font-size: 16px;
  border-top: 2px solid var(--border);
  border-bottom: none;
  padding-top: 14px;
  margin-top: 4px;
}

.calc-breakdown__label {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.calc-breakdown__value {
  font-weight: 500;
  color: var(--text-primary);
  text-align: right;
}

.calc-breakdown__percent {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-left: 8px;
}

/* Cost structure bar */
.calc-bar {
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  margin-bottom: 20px;
  background: var(--border);
}

.calc-bar__segment {
  height: 100%;
  transition: width 0.3s ease;
}

/* CTA */
.calc-cta {
  margin-top: 24px;
  padding: 20px;
  background: var(--accent-10);
  border-radius: var(--radius-lg);
  text-align: center;
}

.calc-cta__text {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Loading */
.calc-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 0;
  color: var(--text-tertiary);
  font-size: 14px;
}

.calc-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Alert */
.calc-alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 16px;
}

.calc-alert--error {
  background: var(--bg-status-error);
  color: var(--text-status-error);
}

.calc-alert--info {
  background: var(--bg-status-info);
  color: var(--text-status-info);
}

/* === Form Row 4-column variant === */
.form-row--4 {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

/* === Small form variants === */
.form-label--small {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.form-input--sm {
  padding: 7px 10px;
  font-size: 13px;
}

/* === Tier Indicator === */
.calc-tier-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  margin-bottom: 4px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: background-color 0.3s, border-color 0.3s;
}

.calc-tier__badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.calc-tier__badge--start {
  background: var(--bg-status-info);
  color: var(--text-status-info);
}

.calc-tier__badge--business {
  background: var(--bg-status-warning);
  color: var(--text-status-warning);
}

.calc-tier__badge--partner {
  background: var(--bg-status-success);
  color: var(--text-status-success);
}

.calc-tier__text {
  font-size: 13px;
  color: var(--text-tertiary);
}

.calc-tier__text--upsell {
  color: var(--text-status-warning);
  font-weight: 500;
}

/* === Result Tier Badge === */
.calc-result__tier {
  text-align: center;
  margin-bottom: 12px;
}

/* === Upsell Banner === */
.calc-upsell {
  padding: 14px 18px;
  background: var(--bg-status-warning);
  color: var(--text-status-warning);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 20px;
  text-align: center;
}

.calc-upsell strong {
  font-weight: 600;
}

/* === China Warehouse Services Section === */
.calc-services-section {
  margin-bottom: 24px;
  padding: 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: background-color 0.3s, border-color 0.3s;
}

.calc-services__header {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.calc-services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.calc-services__sub {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* === Custom Checkboxes === */
.calc-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: background 0.15s;
  user-select: none;
}

.calc-checkbox:hover {
  background: var(--accent-10);
}

.calc-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.calc-checkbox__mark {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border: 2px solid var(--border-hover);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  background: var(--bg-primary);
}

.calc-checkbox__mark::after {
  content: '';
  width: 10px;
  height: 6px;
  border: 2px solid transparent;
  border-top: 0;
  border-right: 0;
  transform: rotate(-45deg);
  margin-top: -2px;
  transition: border-color 0.15s;
}

.calc-checkbox input:checked + .calc-checkbox__mark {
  border-color: var(--accent);
  background: var(--accent);
}

.calc-checkbox input:checked + .calc-checkbox__mark::after {
  border-color: var(--accent-text);
}

.calc-checkbox__text {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.3;
}

/* Auto-highlighted checkbox (auto-detected by TN VED) */
.calc-checkbox--auto {
  background: var(--bg-status-warning);
  border-radius: var(--radius);
}

/* Accent form hint (certification recommendation) */
.form-hint--accent {
  color: var(--text-status-info);
  font-weight: 500;
}

/* === Small Option Card Variant === */
.calc-opt--sm {
  padding: 10px;
}

.calc-opt--sm .calc-opt__title {
  font-size: 13px;
}

.calc-opt--sm .calc-opt__desc {
  font-size: 11px;
}

/* === Collapsible Result Blocks === */
.calc-block {
  border-bottom: 1px solid var(--border);
}

.calc-block:last-of-type {
  border-bottom: none;
}

.calc-block__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  cursor: pointer;
  transition: background 0.1s;
  user-select: none;
}

.calc-block__header:hover {
  opacity: 0.8;
}

.calc-block__header .calc-breakdown__label {
  flex: 1;
}

.calc-block__header .calc-breakdown__value {
  font-weight: 600;
}

.calc-block__arrow {
  display: inline-block;
  font-size: 10px;
  color: var(--text-tertiary);
  transition: transform 0.2s;
  width: 14px;
  flex-shrink: 0;
}

.calc-block.is-open .calc-block__arrow {
  transform: rotate(90deg);
}

.calc-block__body {
  display: none;
  padding: 0 0 8px 22px;
}

.calc-block.is-open .calc-block__body {
  display: block;
  animation: fadeIn 0.2s ease-out;
}

/* Sub-rows inside blocks */
.calc-breakdown__row--sub {
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}

.calc-breakdown__row--sub:last-child {
  border-bottom: none;
}

.calc-breakdown__row--sub .calc-breakdown__label {
  color: var(--text-tertiary);
  font-size: 13px;
}

.calc-breakdown__row--sub .calc-breakdown__value {
  font-size: 13px;
  font-weight: 400;
}

/* === Tooltip System === */
.calc-tooltip {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: help;
  margin-left: 4px;
}

.calc-tooltip__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-10);
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.calc-tooltip:hover .calc-tooltip__icon {
  background: var(--accent);
  color: var(--accent-text);
}

.calc-tooltip__text {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.4;
  padding: 8px 12px;
  border-radius: var(--radius);
  white-space: normal;
  width: max-content;
  max-width: 260px;
  z-index: 200;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
}

.calc-tooltip__text::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--text-primary);
}

.calc-tooltip:hover .calc-tooltip__text {
  display: block;
}

/* === Tier Card Selector === */
.calc-tier-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 16px;
  margin-bottom: 8px;
}

.calc-tier-card {
  position: relative;
  padding: 14px 12px;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-primary);
}

.calc-tier-card:hover:not(.calc-tier-card--disabled) {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.calc-tier-card.is-selected {
  border-color: var(--accent);
  background: var(--accent-10);
}

.calc-tier-card--disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.calc-tier-card__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.calc-tier-card__desc {
  font-size: 12px;
  color: var(--text-tertiary);
}

.calc-tier-card__badge {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 11px;
  display: none;
  align-items: center;
  justify-content: center;
}

.calc-tier-card.is-selected .calc-tier-card__badge {
  display: flex;
}

.calc-tier-hint {
  font-size: 12px;
  color: var(--text-status-warning);
  margin-top: 6px;
  text-align: center;
  display: none;
}

.calc-tier-hint.is-visible {
  display: block;
}

/* Tier card badge colors */
.calc-tier-card[data-tier="start"].is-selected {
  border-color: var(--text-status-info);
}
.calc-tier-card[data-tier="start"].is-selected .calc-tier-card__badge {
  background: var(--text-status-info);
}
.calc-tier-card[data-tier="business"].is-selected {
  border-color: var(--text-status-warning);
}
.calc-tier-card[data-tier="business"].is-selected .calc-tier-card__badge {
  background: var(--text-status-warning);
}
.calc-tier-card[data-tier="partner"].is-selected {
  border-color: var(--text-status-success);
}
.calc-tier-card[data-tier="partner"].is-selected .calc-tier-card__badge {
  background: var(--text-status-success);
}

/* === Checkbox with tooltip (inline) === */
.calc-checkbox__text-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* === Inspection Card Extended Description === */
.calc-opt__subdesc {
  font-size: 10px;
  color: var(--text-tertiary);
  line-height: 1.2;
  margin-top: 2px;
  opacity: 0.8;
}

/* === Payment Hint === */
.form-hint--payment {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 6px;
  font-style: italic;
}

/* === Responsive === */
@media (max-width: 768px) {
  .calc-page { padding: 16px 12px 32px; }
  .card { padding: 20px 16px; }
  .calc-header__title { font-size: 22px; }

  .calc-topbar__logo { display: none; }
  .calc-topbar__badge { font-size: 10px; padding: 3px 8px; }

  .calc-stepper__step span:not(.calc-stepper__num) { display: none; }
  .calc-stepper__line { min-width: 8px; margin: 0 6px; }

  .form-row, .form-row--3 { grid-template-columns: 1fr; }
  .form-row--4 { grid-template-columns: 1fr 1fr; }
  .calc-option-grid--4 { grid-template-columns: 1fr 1fr; }
  .calc-option-grid--3 { grid-template-columns: 1fr; }

  .calc-services__grid { grid-template-columns: 1fr; }

  .calc-result__total-value { font-size: 28px; }
  .calc-nav { flex-direction: column-reverse; }
  .calc-nav .btn { width: 100%; }

  .calc-tier-indicator { flex-direction: column; align-items: flex-start; gap: 6px; }
  .calc-tier-cards { grid-template-columns: 1fr; }
  .calc-tooltip__text { left: 0; transform: none; }
  .calc-tooltip__text::after { left: 12px; transform: none; }
}

@media (max-width: 480px) {
  .calc-option-grid { grid-template-columns: 1fr; }
  .calc-option-grid--4 { grid-template-columns: 1fr; }
  .form-row--4 { grid-template-columns: 1fr; }
}

/* ========================================
   Contact Modal
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl, 16px);
  padding: 32px;
  width: 100%;
  max-width: 440px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlideUp 0.25s ease-out;
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 22px;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: var(--radius, 8px);
  transition: background 0.15s, color 0.15s;
}

.modal__close:hover {
  background: var(--accent-10, rgba(255,255,255,0.1));
  color: var(--text-primary);
}

.modal__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 4px 0;
}

.modal__desc {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0 0 20px 0;
}

.modal__tabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius, 8px);
  overflow: hidden;
}

.modal__tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  background: var(--bg-primary);
  color: var(--text-tertiary);
  border: none;
  transition: all 0.15s;
}

.modal__tab:hover {
  color: var(--text-primary);
}

.modal__tab.is-active {
  background: var(--accent);
  color: #fff;
}

.modal__skip {
  text-align: center;
  margin: 12px 0 0 0;
  font-size: 12px;
}

.modal__skip a {
  color: var(--text-tertiary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s;
}

.modal__skip a:hover {
  color: var(--text-primary);
}

.form-error {
  color: var(--error, #ef4444);
  font-size: 12px;
  margin-top: -4px;
  margin-bottom: 8px;
}

@media (max-width: 480px) {
  .modal {
    padding: 24px 20px;
    max-width: 100%;
  }
}