/* ============================================
   STUDIO DA — Planungstools Page
   Calculator tools, tab bar, result panels
   ============================================ */

/* --- Page-scoped Design Tokens --- */
.tool-section,
.tool-panel {
  --color-success-tool: #6AC882;
  --color-rating-excellent: #4CAF50;
  --color-rating-good: #8BC34A;
  --color-rating-ok: #FFC107;
  --color-rating-poor: #FF9800;
  --color-rating-bad: #F44336;
  --color-error-tool: #ff6464;
}

/* ===========================================
   TOOL TAB BAR (Sticky)
   =========================================== */
.tool-tabs {
  position: sticky;
  top: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--color-glass-dark);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--color-border-on-dark);
  padding: 0;
  transition: top var(--duration-normal) var(--ease-out);
}

.nav--scrolled ~ main .tool-tabs,
.nav--scrolled ~ .page-transition .tool-tabs {
  top: 56px;
}

.tool-tabs__inner {
  display: flex;
  gap: var(--space-xs);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--gutter);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tool-tabs__inner::-webkit-scrollbar {
  display: none;
}

.tool-tab {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-on-dark-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-normal) var(--ease-out);
  flex-shrink: 0;
}

.tool-tab:hover {
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.06);
  border-color: var(--color-border-on-dark);
}

.tool-tab--active {
  color: var(--color-bg);
  background: var(--color-text);
  border-color: var(--color-text);
  font-weight: 600;
}

.tool-tab--active:hover {
  color: var(--color-bg);
  background: var(--color-text);
  opacity: 0.85;
}

.tool-tab__icon {
  font-size: 1.15rem;
  line-height: 1;
}


/* ===========================================
   TOOL CONTENT PANELS
   =========================================== */
.tool-panel {
  display: none;
  animation: toolFadeIn 0.4s var(--ease-out) forwards;
}

.tool-panel--active {
  display: block;
}

@keyframes toolFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tool-section {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  min-height: 60vh;
}

.tool-section p {
  color: var(--color-text-on-dark-secondary);
}


/* ===========================================
   CALCULATOR LAYOUT
   =========================================== */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.calc-results {
  position: sticky;
  top: 140px;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}


/* ===========================================
   INPUT GROUP
   =========================================== */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.input-group__label {
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-on-dark-secondary);
}


/* ===========================================
   RADIO CARDS (Building Type)
   =========================================== */
.radio-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.radio-card {
  position: relative;
  cursor: pointer;
}

.radio-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-card__face {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
}

.radio-card__face:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
}

.radio-card input:checked + .radio-card__face {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(176,137,104,0.12);
}

.radio-card__icon {
  font-size: 2rem;
  line-height: 1;
}

.radio-card__label {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-text-on-dark);
  letter-spacing: var(--tracking-wide);
}

.radio-card input:checked + .radio-card__face .radio-card__label {
  color: var(--color-accent);
}


/* ===========================================
   CUSTOM RANGE SLIDER
   =========================================== */
.range-slider {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.range-slider__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.range-slider__value {
  font-family: var(--font-display);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--color-accent);
  min-width: 8ch;
  text-align: right;
}

.range-slider__track {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
  position: relative;
}

.range-slider__track::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg-dark);
  box-shadow: 0 0 10px rgba(176,137,104,0.25);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.range-slider__track::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 16px rgba(176,137,104,0.35);
}

.range-slider__track::-webkit-slider-thumb:active {
  transform: scale(1.25);
}

.range-slider__track::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg-dark);
  box-shadow: 0 0 10px rgba(176,137,104,0.25);
  cursor: pointer;
}

.range-slider__limits {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
  opacity: 0.6;
}


/* ===========================================
   QUALITY TOGGLE BUTTONS
   =========================================== */
.toggle-btns {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.toggle-btn {
  flex: 1;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-text-on-dark-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
  border-right: 1px solid var(--color-border-on-dark);
}

.toggle-btn:last-child {
  border-right: none;
}

.toggle-btn:hover {
  background: rgba(255,255,255,0.06);
  color: var(--color-text-on-dark);
}

.toggle-btn--active {
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 600;
}

.toggle-btn--active:hover {
  background: var(--color-text);
  color: var(--color-bg);
  opacity: 0.85;
}


/* ===========================================
   CUSTOM SELECT DROPDOWN
   =========================================== */
.custom-select {
  position: relative;
}

.custom-select select {
  width: 100%;
  padding: var(--space-sm) var(--space-lg);
  padding-right: var(--space-2xl);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: all var(--duration-normal);
}

.custom-select select:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
}

.custom-select select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(176,137,104,0.12);
}

.custom-select select option {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.custom-select::after {
  content: '▾';
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  pointer-events: none;
  font-size: 0.9rem;
}

/* Custom number input */
.number-input {
  width: 100%;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--duration-normal);
}

.number-input:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
}

.number-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(176,137,104,0.12);
}


/* ===========================================
   RESULT PANELS (Glassmorphic)
   =========================================== */
.result-panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.result-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0.6;
}

.result-panel--accent {
  border-color: rgba(176,137,104,0.3);
}

.result-panel__title {
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-lg);
}

.result-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.result-main__value {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 500;
  color: var(--color-accent);
  line-height: 1;
  transition: all var(--duration-normal);
}

.result-main__label {
  font-size: var(--text-small);
  color: var(--color-text-on-dark-secondary);
}

.result-secondary {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-on-dark);
}

.result-secondary__item {
  flex: 1;
}

.result-secondary__value {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 500;
  color: var(--color-text-on-dark);
  line-height: 1;
  margin-bottom: var(--space-2xs);
}

.result-secondary__label {
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
}


/* ===========================================
   CHART CONTAINERS
   =========================================== */
.chart-container {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.chart-container__title {
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-lg);
}

.chart-wrap {
  position: relative;
  width: 100%;
  max-height: 300px;
}

.chart-wrap canvas {
  width: 100% !important;
  max-height: 300px;
}

.chart-wrap--doughnut {
  max-width: 280px;
  max-height: 280px;
  margin: 0 auto;
}


/* ===========================================
   COMPARISON CARDS (Energy)
   =========================================== */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.comparison-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--duration-normal);
}

.comparison-card--a {
  border-color: rgba(176,137,104,0.3);
}

.comparison-card--b {
  border-color: rgba(106,200,130,0.3);
}

.comparison-card__header {
  font-size: var(--text-overline);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid;
}

.comparison-card--a .comparison-card__header {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.comparison-card--b .comparison-card__header {
  color: var(--color-success-tool);
  border-color: var(--color-success-tool);
}

.comparison-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-row__label {
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
}

.comparison-row__value {
  font-family: var(--font-display);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--color-text-on-dark);
}


/* ===========================================
   PAYBACK / SAVINGS PANEL
   =========================================== */
.payback-panel {
  background: linear-gradient(135deg, rgba(176,137,104,0.08), rgba(176,137,104,0.02));
  border: 1px solid rgba(176,137,104,0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.payback-panel__text {
  font-size: var(--text-body-lg);
  color: var(--color-text-on-dark);
  line-height: var(--leading-relaxed);
}

.payback-panel__highlight {
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-display);
}

.savings-panel {
  background: linear-gradient(135deg, rgba(106,200,130,0.1), rgba(106,200,130,0.02));
  border: 1px solid rgba(106,200,130,0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.savings-panel__text {
  font-size: var(--text-body-lg);
  color: var(--color-text-on-dark);
  line-height: var(--leading-relaxed);
}

.savings-panel__highlight {
  color: var(--color-success-tool);
  font-weight: 600;
  font-family: var(--font-display);
}


/* ===========================================
   KFW RESULT GRID
   =========================================== */
.kfw-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.kfw-result-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
}

.kfw-result-card__value {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 500;
  color: var(--color-text-on-dark);
  line-height: 1;
  margin-bottom: var(--space-2xs);
}

.kfw-result-card__value--accent {
  color: var(--color-accent);
  font-size: var(--text-h2);
}

.kfw-result-card__label {
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
}

.kfw-badge {
  display: inline-block;
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--text-caption);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-xs);
}


/* ===========================================
   U-WERT CALCULATOR
   =========================================== */
.uvalue-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-3xl);
  align-items: start;
}

.layer-builder {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.layer-row {
  display: grid;
  grid-template-columns: 1fr 140px auto;
  gap: var(--space-md);
  align-items: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  transition: all var(--duration-normal);
  animation: layerSlideIn 0.3s var(--ease-out) forwards;
}

@keyframes layerSlideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

.layer-row:hover {
  border-color: rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
}

.layer-row select {
  width: 100%;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-sm);
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  cursor: pointer;
}

.layer-row select option {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.layer-thickness {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.layer-thickness input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.layer-thickness input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg-dark);
  cursor: pointer;
}

.layer-thickness input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg-dark);
  cursor: pointer;
}

.layer-thickness__val {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-accent);
  min-width: 4ch;
  text-align: right;
  font-family: var(--font-mono);
}

.layer-delete {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255,100,100,0.2);
  border-radius: var(--radius-sm);
  color: rgba(255,100,100,0.6);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--duration-fast);
}

.layer-delete:hover {
  background: rgba(255,100,100,0.1);
  border-color: rgba(255,100,100,0.5);
  color: var(--color-error-tool);
}

.add-layer-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  border: 1.5px dashed var(--color-border-on-dark);
  border-radius: var(--radius-md);
  color: var(--color-text-on-dark-secondary);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-normal);
}

.add-layer-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(176,137,104,0.05);
}


/* ===========================================
   U-VALUE DISPLAY
   =========================================== */
.uvalue-display {
  position: sticky;
  top: 140px;
}

.uvalue-result {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.uvalue-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 500;
  line-height: 1;
  transition: color var(--duration-normal);
}

.uvalue-unit {
  font-size: var(--text-body);
  color: var(--color-text-on-dark-secondary);
  margin-top: var(--space-xs);
}

.uvalue-rating {
  display: inline-block;
  padding: var(--space-2xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--text-small);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  margin-top: var(--space-md);
  transition: all var(--duration-normal);
}

/* Color coding */
.uvalue-rating--excellent {
  background: rgba(76,175,80,0.15);
  color: var(--color-rating-excellent);
}

.uvalue-rating--good {
  background: rgba(139,195,74,0.15);
  color: var(--color-rating-good);
}

.uvalue-rating--ok {
  background: rgba(255,193,7,0.15);
  color: var(--color-rating-ok);
}

.uvalue-rating--poor {
  background: rgba(255,152,0,0.15);
  color: var(--color-rating-poor);
}

.uvalue-rating--bad {
  background: rgba(244,67,54,0.15);
  color: var(--color-rating-bad);
}

.uvalue-number--excellent { color: var(--color-rating-excellent); }
.uvalue-number--good      { color: var(--color-rating-good); }
.uvalue-number--ok        { color: var(--color-rating-ok); }
.uvalue-number--poor      { color: var(--color-rating-poor); }
.uvalue-number--bad       { color: var(--color-rating-bad); }


/* ===========================================
   WALL SECTION VISUALIZATION
   =========================================== */
.wall-section {
  margin-top: var(--space-xl);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.wall-section__title {
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-on-dark-secondary);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-on-dark);
}

.wall-layers-viz {
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  gap: 1px;
}

.wall-layer-viz {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-caption);
  color: var(--color-bg-dark);
  font-weight: 600;
  min-height: 16px;
  transition: all var(--duration-normal);
  overflow: hidden;
}

.wall-layer-viz__name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wall-layer-viz__mm {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

/* GEG reference line */
.uvalue-geg-ref {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-rating-ok);
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
}

.uvalue-geg-ref strong {
  color: var(--color-rating-ok);
}


/* ===========================================
   FORMULA DISPLAY
   =========================================== */
.formula-display {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
  line-height: var(--leading-relaxed);
}

.formula-display em {
  color: var(--color-accent);
  font-style: normal;
}


/* ===========================================
   PRESET BUTTONS
   =========================================== */
.presets {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.preset-btn {
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--color-text-on-dark-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-normal);
}

.preset-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(176,137,104,0.06);
}


/* ===========================================
   DISCLAIMER
   =========================================== */
.disclaimer {
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
  line-height: var(--leading-relaxed);
}

.disclaimer strong {
  color: var(--color-accent);
}


/* ===========================================
   CTA INLINE
   =========================================== */
.tool-cta {
  margin-top: var(--space-2xl);
  text-align: center;
}


/* ===========================================
   INPUT HINT
   =========================================== */
.input-group__hint {
  font-size: var(--text-caption);
  color: var(--color-text-on-dark-secondary);
  opacity: 0.7;
  font-style: italic;
}


/* ===========================================
   RENDITERECHNER — MODE TOGGLE
   =========================================== */
.rendite-mode-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-3xl);
  max-width: 480px;
}

.rendite-mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--color-text-on-dark-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
  border-right: 1px solid var(--color-border-on-dark);
  white-space: nowrap;
}

.rendite-mode-btn:last-child {
  border-right: none;
}

.rendite-mode-btn:hover {
  background: rgba(255,255,255,0.06);
  color: var(--color-text-on-dark);
}

.rendite-mode-btn--active {
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 600;
}

.rendite-mode-btn--active:hover {
  background: var(--color-text);
  color: var(--color-bg);
  opacity: 0.85;
}

.rendite-mode-btn__icon {
  font-size: 1.15rem;
  line-height: 1;
}

/* Mode Panel Animation */
.rendite-mode-panel {
  animation: renditeFadeIn 0.4s var(--ease-out) forwards;
}

@keyframes renditeFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ===========================================
   RENDITERECHNER — RESULTS GRID
   =========================================== */
.rendite-results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}


/* ===========================================
   RENDITERECHNER — BREAK-EVEN PANEL
   =========================================== */
.rendite-breakeven-panel {
  background: linear-gradient(135deg, rgba(176,137,104,0.08), rgba(176,137,104,0.02));
  border: 1px solid rgba(176,137,104,0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.rendite-breakeven-panel__text {
  font-size: var(--text-body-lg);
  color: var(--color-text-on-dark);
  line-height: var(--leading-relaxed);
}

.rendite-breakeven-panel__highlight {
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-display);
}

.rendite-breakeven-panel__highlight--green {
  color: var(--color-success-tool);
}

.rendite-breakeven-panel__highlight--red {
  color: var(--color-rating-bad);
}


/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 1024px) {
  .calc-layout {
    grid-template-columns: 1fr;
  }

  .calc-results {
    position: static;
  }

  .uvalue-layout {
    grid-template-columns: 1fr;
  }

  .uvalue-display {
    position: static;
  }

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

  .kfw-results {
    grid-template-columns: repeat(2, 1fr);
  }

  .rendite-results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .tool-tabs__inner {
    gap: var(--space-2xs);
    padding: var(--space-xs) var(--gutter);
  }

  .tool-tab {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-caption);
  }

  .radio-cards {
    grid-template-columns: 1fr;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .result-secondary {
    flex-direction: column;
    gap: var(--space-md);
  }

  .layer-row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .layer-thickness {
    justify-content: space-between;
  }

  .layer-delete {
    justify-self: end;
  }

  .kfw-results {
    grid-template-columns: 1fr;
  }

  .chart-wrap {
    max-height: 250px;
  }

  .chart-wrap--doughnut {
    max-width: 220px;
    max-height: 220px;
  }

  .rendite-mode-toggle {
    max-width: 100%;
  }

  .rendite-mode-btn {
    font-size: var(--text-small);
    padding: var(--space-sm) var(--space-md);
  }

  .rendite-results-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .tool-section {
    padding: var(--space-2xl) 0;
  }

  .toggle-btns {
    flex-direction: column;
  }

  .toggle-btn {
    border-right: none;
    border-bottom: 1px solid var(--color-border-on-dark);
  }

  .toggle-btn:last-child {
    border-bottom: none;
  }

  .result-panel {
    padding: var(--space-lg);
  }

  .uvalue-number {
    font-size: 3rem;
  }

  .rendite-mode-toggle {
    flex-direction: column;
  }

  .rendite-mode-btn {
    border-right: none;
    border-bottom: 1px solid var(--color-border-on-dark);
  }

  .rendite-mode-btn:last-child {
    border-bottom: none;
  }
}