:root {
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  --color-primary: #0d9488;
  --color-primary-light: #14b8a6;
  --color-primary-dark: #0f766e;
  --color-primary-bg: rgba(13, 148, 136, 0.08);
  --color-primary-bg-strong: rgba(13, 148, 136, 0.15);

  --color-blue: #3b82f6;
  --color-blue-bg: rgba(59, 130, 246, 0.08);
  --color-green: #10b981;
  --color-green-bg: rgba(16, 185, 129, 0.08);
  --color-amber: #f59e0b;
  --color-amber-bg: rgba(245, 158, 11, 0.08);
  --color-red: #ef4444;
  --color-red-bg: rgba(239, 68, 68, 0.08);
  --color-purple: #8b5cf6;
  --color-purple-bg: rgba(139, 92, 246, 0.08);

  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-text: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-500);
  --color-text-tertiary: var(--color-gray-400);
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);

  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-focus: 0 0 0 3px rgba(13, 148, 136, 0.25);

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0f1419;
    --color-surface: #1a1f2e;
    --color-text: #e5e7eb;
    --color-text-secondary: #9ca3af;
    --color-text-tertiary: #6b7280;
    --color-border: #2d3548;
    --color-border-light: #232838;
    --color-primary: #2dd4bf;
    --color-primary-light: #5eead4;
    --color-primary-dark: #14b8a6;
    --color-primary-bg: rgba(45, 212, 191, 0.1);
    --color-primary-bg-strong: rgba(45, 212, 191, 0.18);
    --color-blue-bg: rgba(59, 130, 246, 0.12);
    --color-green-bg: rgba(16, 185, 129, 0.12);
    --color-amber-bg: rgba(245, 158, 11, 0.12);
    --color-red-bg: rgba(239, 68, 68, 0.12);
    --color-purple-bg: rgba(139, 92, 246, 0.12);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
    --shadow-focus: 0 0 0 3px rgba(45, 212, 191, 0.3);
  }
}

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

html {
  font-size: 15px;
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { margin: 0; padding: 0; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

p { margin: 0; }

/* Container */
.container {
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* ── Header ── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  margin-bottom: 8px;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header__brand h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.header__icon {
  flex-shrink: 0;
}

.language-toggle select {
  width: 110px;
  font-size: 13px;
  padding: 6px 30px 6px 10px;
}

/* ── Hero intro ── */
.hero-intro {
  text-align: center;
  padding: 24px 16px 28px;
  margin-bottom: 4px;
}

.hero-intro p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Progress bar ── */
.progress-bar {
  margin-bottom: 28px;
  padding: 0 4px;
}

.progress-bar__track {
  height: 3px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.progress-bar__steps {
  display: flex;
  justify-content: space-between;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  color: var(--color-text-tertiary);
}

.progress-step:hover {
  color: var(--color-text-secondary);
  background: var(--color-border-light);
}

.progress-step__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  background: var(--color-border-light);
  color: var(--color-text-tertiary);
  transition: all var(--transition);
}

.progress-step__label {
  font-size: 12px;
  font-weight: 500;
  transition: color var(--transition);
}

.progress-step.active .progress-step__number {
  background: var(--color-primary);
  color: white;
}

.progress-step.active .progress-step__label {
  color: var(--color-primary);
  font-weight: 600;
}

.progress-step.completed .progress-step__number {
  background: var(--color-primary-bg-strong);
  color: var(--color-primary);
}

.progress-step.completed .progress-step__label {
  color: var(--color-text-secondary);
}

@media (max-width: 540px) {
  .progress-step__label { display: none; }
  .progress-bar__steps { justify-content: space-around; }
}

/* ── Cards ── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card__header {
  padding: 20px 24px 16px;
}

.card__body {
  padding: 8px 24px 24px;
}

.card__footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border-light);
  background: var(--color-gray-50);
}

@media (prefers-color-scheme: dark) {
  .card__footer { background: rgba(255,255,255,0.02); }
}

/* ── Sections (step wizard) ── */
.section-header h2 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}

.section-hint {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.step-section {
  display: none;
}

.step-section.active {
  display: block;
  animation: fadeSlideIn 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

.step-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Forms ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-grid--2col { grid-template-columns: repeat(2, 1fr); }
.form-grid--3col { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 580px) {
  .form-grid,
  .form-grid--2col,
  .form-grid--3col {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 0;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 550;
  color: var(--color-text);
}

.form-control {
  display: block;
  width: 100%;
  padding: 9px 12px;
  font-size: 14px;
  font-family: var(--font-family);
  line-height: 1.4;
  color: var(--color-text);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.form-control.invalid {
  border-color: var(--color-red);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-control.valid {
  border-color: var(--color-green);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 34px;
  cursor: pointer;
}

input[type="number"] {
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ── Input with unit ── */
.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-unit .form-control {
  padding-right: 64px;
}

.input-unit {
  position: absolute;
  right: 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-tertiary);
  pointer-events: none;
  white-space: nowrap;
}

/* ── Tooltip icon ── */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  color: var(--color-text-secondary);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  flex-shrink: 0;
}

.tooltip-icon:hover,
.tooltip-icon:focus-visible {
  background: var(--color-primary);
  color: white;
  outline: none;
}

/* ── Tooltip Modal ── */
.tooltip-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms, visibility 200ms;
}

.tooltip-modal.visible {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
}

.tooltip-modal .modal-content {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 200ms cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1;
}

.tooltip-modal.visible .modal-content {
  transform: scale(1);
}

.close {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 20px;
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  border-radius: var(--radius-sm);
}

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

#tooltip-content h4 {
  font-size: 15px;
  font-weight: 650;
  color: var(--color-primary);
  margin: 0 0 8px;
}

#tooltip-content p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ── Apartment grid ── */
.apartment-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 700px) {
  .apartment-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 420px) {
  .apartment-grid { grid-template-columns: 1fr; }
}

.apartment-type {
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
}

.apartment-type h4 {
  font-size: 15px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.apartment-type .form-group {
  margin-bottom: 10px;
}

.apartment-type .form-group:last-child {
  margin-bottom: 0;
}

.apartment-type .form-label {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.apartment-type .form-control {
  font-size: 13px;
  padding: 7px 10px;
}

/* ── Share total indicator ── */
.share-total {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px;
  border-radius: var(--radius-md);
  background: var(--color-background);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.share-total__value {
  font-weight: 700;
  font-size: 14px;
}

.share-total__value.share-ok {
  color: var(--color-green);
}

.share-total__value.share-warn {
  color: var(--color-red);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 550;
  font-family: var(--font-family);
  line-height: 1.4;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

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

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

.btn--lg {
  padding: 12px 24px;
  font-size: 15px;
  border-radius: var(--radius-lg);
}

.btn--full-width { width: 100%; }

/* ── Calculate button ── */
.calculate-section {
  margin: 28px 0 32px;
}

.btn--calculate {
  font-size: 16px;
  font-weight: 650;
  padding: 14px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  box-shadow: var(--shadow-md), 0 0 0 0 rgba(13,148,136,0);
  transition: all 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.btn--calculate:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg), 0 0 24px rgba(13,148,136,0.2);
}

.btn--calculate:active:not(:disabled) {
  transform: translateY(0);
}

/* ── Loading state ── */
.loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  margin: -11px 0 0 -11px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

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

/* ── Results section ── */
.results-section {
  margin-top: 8px;
  animation: fadeSlideIn 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.results-section > h2 {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

/* ── Summary cards ── */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

@media (max-width: 700px) {
  .summary-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 400px) {
  .summary-cards { grid-template-columns: 1fr; }
}

.summary-card {
  border: none;
  text-align: center;
}

.summary-card .card__body {
  padding: 18px 14px;
}

.summary-card h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.summary-card .metric-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: 2px;
  font-feature-settings: "tnum";
}

.summary-card small {
  font-size: 11px;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.summary-card--investment { background: var(--color-blue-bg); }
.summary-card--income { background: var(--color-green-bg); }
.summary-card--costs { background: var(--color-amber-bg); }
.summary-card--payback { background: var(--color-purple-bg); }

/* ── Scenarios ── */
.scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

@media (max-width: 700px) {
  .scenarios { grid-template-columns: 1fr; }
}

.scenario-card .card__header {
  padding: 14px 18px 10px;
}

.scenario-card .card__header h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  margin: 0;
}

.scenario-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.scenario-badge--optimistic {
  background: var(--color-green-bg);
  color: var(--color-green);
}

.scenario-badge--moderate {
  background: var(--color-amber-bg);
  color: var(--color-amber);
}

.scenario-badge--conservative {
  background: var(--color-red-bg);
  color: var(--color-red);
}

.scenario-card .card__body {
  padding: 8px 18px 18px;
}

.scenario-metrics {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.metric:last-child { border-bottom: none; }

.metric-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.scenario-metrics .metric-value {
  font-size: 15px;
  font-weight: 650;
  color: var(--color-text);
  font-feature-settings: "tnum";
  margin: 0;
}

/* Status colors */
.status-positive { color: var(--color-green) !important; }
.status-negative { color: var(--color-red) !important; }
.status-neutral { color: var(--color-amber) !important; }

/* ── Chart ── */
.chart-section {
  margin-bottom: 24px;
}

.chart-section .card__header {
  padding: 16px 20px 12px;
}

.chart-section .card__header h3 {
  font-size: 15px;
  font-weight: 650;
  margin: 0;
}

.chart-container {
  width: 100%;
  height: 380px;
  position: relative;
}

@media (max-width: 580px) {
  .chart-container { height: 260px; }
}

/* ── Export & Share ── */
.export-section {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 40px;
}


/* ── Error & success messages ── */
.error-message, .success-message {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-top: 10px;
}

.error-message {
  background: var(--color-red-bg);
  color: var(--color-red);
  border: 1px solid rgba(239,68,68,0.2);
}

.success-message {
  background: var(--color-green-bg);
  color: var(--color-green);
  border: 1px solid rgba(16,185,129,0.2);
}

/* ── Accessibility ── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.custom-cost-input {
  margin-top: 8px;
}

/* ── Hidden ── */
.hidden { display: none !important; }
.visible { display: block !important; }
.tooltip-modal.visible,
.feedback-modal.visible { display: flex !important; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-tertiary); }

/* ── Floating feedback button ── */
.feedback-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
}

.feedback-fab:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 4px 20px rgba(13,148,136,0.3);
}

.feedback-fab svg { flex-shrink: 0; }

/* ── Feedback modal ── */
.feedback-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms, visibility 200ms;
}

.feedback-modal.visible {
  opacity: 1;
  visibility: visible;
}

.feedback-modal .modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
}

.feedback-modal .modal-content {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  max-width: 460px;
  width: 92%;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95) translateY(8px);
  transition: transform 250ms cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1;
}

.feedback-modal.visible .modal-content {
  transform: scale(1) translateY(0);
}

.feedback-modal h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.feedback-modal .feedback-subtitle {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.feedback-modal .form-group {
  margin-bottom: 14px;
}

.feedback-modal .form-label {
  font-size: 13px;
  margin-bottom: 5px;
}

.feedback-modal textarea.form-control {
  min-height: 100px;
  resize: vertical;
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
}

.feedback-modal .feedback-type-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.feedback-type-btn {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 550;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.feedback-type-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.feedback-type-btn.active {
  background: var(--color-primary-bg-strong);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.feedback-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.feedback-success {
  text-align: center;
  padding: 20px 0;
}

.feedback-success svg {
  margin-bottom: 12px;
}

.feedback-success h4 {
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 6px;
}

.feedback-success p {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ── Post-calculation feedback prompt ── */
.feedback-prompt {
  text-align: center;
  padding: 20px;
  margin: 16px 0 24px;
  background: var(--color-primary-bg);
  border: 1px solid rgba(13,148,136,0.15);
  border-radius: var(--radius-lg);
  animation: fadeSlideIn 500ms 300ms both;
}

.feedback-prompt p {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.feedback-prompt .btn {
  font-size: 13px;
  padding: 7px 16px;
}

/* ── Print ── */
@media print {
  .header, .input-sections, .calculate-section, .export-section, .tooltip-modal, .progress-bar, .hero-intro, .feedback-fab, .feedback-modal, .feedback-prompt { display: none; }
  .results-section { margin-top: 0; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}