/* ==========================================================================
   AK Energy Consulting - Apple-Inspired Design System
   ========================================================================== */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors - Apple-inspired */
  --color-bg: #FBFBFD;
  --color-surface: #FFFFFF;
  --color-surface-secondary: #F5F5F7;
  --color-surface-tertiary: #E8E8ED;
  --color-text: #1D1D1F;
  --color-text-secondary: #6E6E73;
  --color-text-tertiary: #86868B;
  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.12);

  /* Brand Colors */
  --color-primary: #00843D;
  --color-primary-light: #34C759;
  --color-primary-dark: #006830;
  --color-primary-bg: rgba(0, 132, 61, 0.08);
  --color-accent: #0071E3;
  --color-accent-bg: rgba(0, 113, 227, 0.08);

  /* Semantic Colors */
  --color-success: #34C759;
  --color-warning: #FF9500;
  --color-danger: #FF3B30;
  --color-info: #5AC8FA;

  /* Energieklassen */
  --ek-aplus: #00843D;
  --ek-a: #4CB848;
  --ek-b: #BED62F;
  --ek-c: #FFF200;
  --ek-d: #FFB800;
  --ek-e: #FF8200;
  --ek-f: #FF5100;
  --ek-g: #E2001A;
  --ek-h: #9E0020;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-hero: 3.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Shadows - Apple style */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1), 0 8px 20px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04), 0 0 1px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-base: 250ms cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-slow: 400ms cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --max-width: 1200px;
  --header-height: 52px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.text-hero {
  font-size: var(--font-size-hero);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.text-headline {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.text-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
}

.text-body {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

.text-caption {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.text-overline {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition-base);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.logo-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.logo-text span {
  color: var(--color-primary);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: var(--space-1);
  list-style: none;
}

.nav-tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: none;
  background: none;
  font-family: inherit;
}

.nav-tab:hover {
  color: var(--color-text);
  background: var(--color-surface-secondary);
}

.nav-tab.active {
  color: var(--color-surface);
  background: var(--color-text);
}

/* Mode Toggle */
.mode-toggle {
  display: flex;
  background: var(--color-surface-secondary);
  border-radius: var(--radius-full);
  padding: 2px;
  gap: 2px;
}

.mode-btn {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border: none;
  background: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
  font-family: inherit;
}

.mode-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* --- Main Content --- */
.main {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

.section {
  padding: var(--space-20) var(--space-6);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header .text-overline {
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
}

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-flat {
  box-shadow: none;
  background: var(--color-surface-secondary);
  border: none;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}

.card-header {
  margin-bottom: var(--space-6);
}

.card-header h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

.card-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* --- Form Elements (Apple-style) --- */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-sublabel {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-weight: 400;
  margin-left: var(--space-2);
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus {
  background: var(--color-surface);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}

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

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%2386868B' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

/* Range Slider (Apple-style) */
.form-range-group {
  margin-bottom: var(--space-4);
}

.form-range-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.form-range-value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.form-range {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--color-surface-tertiary);
  border-radius: var(--radius-full);
  outline: none;
}

.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-md);
}

/* Checkbox / Toggle */
.form-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.form-toggle input {
  display: none;
}

.toggle-track {
  width: 44px;
  height: 26px;
  background: var(--color-surface-tertiary);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.form-toggle input:checked + .toggle-track {
  background: var(--color-primary);
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-fast);
}

.form-toggle input:checked + .toggle-track::after {
  transform: translateX(18px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: scale(1.02);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: var(--color-surface-secondary);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-tertiary);
}

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

.btn-accent:hover {
  background: #0062cc;
  transform: scale(1.02);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-bg);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
  background: var(--color-accent-bg);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

/* --- Results / Data Display --- */
.result-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.result-hero {
  padding: var(--space-10) var(--space-8);
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary-bg), rgba(52, 199, 89, 0.05));
}

.result-hero .big-number {
  font-size: var(--font-size-hero);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.result-hero .big-label {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

.result-body {
  padding: var(--space-8);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
}

.stat-item {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.stat-item.positive .stat-value {
  color: var(--color-primary);
}

.stat-item.negative .stat-value {
  color: var(--color-danger);
}

/* Ranking List */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ranking-item {
  display: flex;
  align-items: stretch;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.ranking-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.ranking-item.gold {
  border-color: #FFD700;
  box-shadow: 0 0 0 1px rgba(255, 215, 0, 0.3), var(--shadow-md);
}

.ranking-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  min-height: 100%;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.ranking-badge.rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); }
.ranking-badge.rank-2 { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); }
.ranking-badge.rank-3 { background: linear-gradient(135deg, #CD7F32, #B8860B); }
.ranking-badge.rank-other { background: var(--color-surface-tertiary); color: var(--color-text-secondary); }

.ranking-image {
  width: 160px;
  height: 160px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-surface-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.ranking-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ranking-image .placeholder-icon {
  font-size: 2rem;
  opacity: 0.3;
}

.ranking-content {
  flex: 1;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.ranking-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.ranking-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.ranking-meta-item {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.ranking-meta-item strong {
  color: var(--color-text);
}

.ranking-score {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  flex-shrink: 0;
  padding: var(--space-4);
}

.score-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: white;
  background: conic-gradient(var(--color-primary) calc(var(--score) * 1%), var(--color-surface-tertiary) 0);
  position: relative;
}

.score-circle::before {
  content: attr(data-score);
  position: absolute;
  width: 44px;
  height: 44px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
}

/* Score Bars */
.score-bar-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.score-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.score-bar-label {
  width: 100px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.score-bar-track {
  flex: 1;
  height: 6px;
  background: var(--color-surface-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  transition: width var(--transition-slow);
}

.score-bar-fill.eco { background: #34C759; }
.score-bar-fill.fire { background: #FF3B30; }
.score-bar-fill.price { background: #FF9500; }
.score-bar-fill.weight { background: #5AC8FA; }
.score-bar-fill.summer { background: #AF52DE; }

.score-bar-value {
  width: 30px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: right;
  flex-shrink: 0;
}

/* --- Table (Apple-style) --- */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--font-size-sm);
}

.data-table thead th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border-strong);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 1;
}

.data-table tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.data-table tbody tr:hover td {
  background: var(--color-surface-secondary);
}

.data-table tbody td:first-child {
  font-weight: 500;
  color: var(--color-text);
}

/* --- Tags / Badges --- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.tag-green { background: rgba(52, 199, 89, 0.12); color: #248A3D; }
.tag-orange { background: rgba(255, 149, 0, 0.12); color: #C93400; }
.tag-red { background: rgba(255, 59, 48, 0.12); color: #D70015; }
.tag-blue { background: rgba(0, 122, 255, 0.12); color: #0040DD; }
.tag-purple { background: rgba(175, 82, 222, 0.12); color: #8944AB; }
.tag-gray { background: var(--color-surface-tertiary); color: var(--color-text-secondary); }

/* Category Tags */
.tag-organisch { background: rgba(52, 199, 89, 0.12); color: #248A3D; }
.tag-mineralisch { background: rgba(0, 122, 255, 0.12); color: #0040DD; }
.tag-synthetisch { background: rgba(255, 149, 0, 0.12); color: #C93400; }

/* --- Charts Container --- */
.chart-container {
  position: relative;
  width: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  margin: var(--space-6) 0;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* --- Timeline (Sanierungsfahrplan) --- */
.timeline {
  position: relative;
  padding-left: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-surface-tertiary);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-10) + 10px);
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
  z-index: 1;
}

.timeline-dot.pending {
  background: var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-surface-tertiary);
}

.timeline-year {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.timeline-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

/* --- CO₂ Comparison Blocks --- */
.co2-comparison {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.co2-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
}

.co2-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
}

.co2-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.co2-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* --- Energy Class Bar --- */
.energy-class-bar {
  display: flex;
  gap: 2px;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 36px;
  margin: var(--space-4) 0;
}

.energy-class-segment {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: white;
  opacity: 0.4;
  transition: all var(--transition-base);
}

.energy-class-segment.active {
  opacity: 1;
  transform: scaleY(1.15);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.energy-class-segment.highlight {
  opacity: 1;
  transform: scaleY(1.3);
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* --- Tabs (Module content) --- */
.module {
  display: none;
  animation: fadeIn var(--transition-base);
}

.module.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-24) var(--space-6) var(--space-16);
  text-align: center;
}

.hero h1 {
  max-width: 800px;
  margin: 0 auto var(--space-6);
}

.hero p {
  max-width: 600px;
  margin: 0 auto var(--space-8);
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
}

.hero .btn-group {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Detail Modal/Panel --- */
.detail-panel {
  position: fixed;
  top: 0;
  right: -500px;
  width: 480px;
  max-width: 90vw;
  height: 100vh;
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  z-index: 2000;
  overflow-y: auto;
  transition: right var(--transition-slow);
  padding: var(--space-8);
}

.detail-panel.open {
  right: 0;
}

.detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.detail-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.detail-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-surface-secondary);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.detail-close:hover {
  background: var(--color-surface-tertiary);
  color: var(--color-text);
}

/* Detail Image */
.detail-image {
  width: 100%;
  height: 320px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-secondary);
  overflow: hidden;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-image .placeholder {
  font-size: 4rem;
  opacity: 0.15;
}

/* --- Pill navigation (sub-navigation within modules) --- */
.pill-nav {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding: var(--space-2) 0;
  margin-bottom: var(--space-6);
  scrollbar-width: none;
}

.pill-nav::-webkit-scrollbar {
  display: none;
}

.pill {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pill.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

/* --- Footer --- */
.footer {
  padding: var(--space-12) var(--space-6);
  background: var(--color-surface-secondary);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

.footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* --- Utility Classes --- */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-secondary); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.w-full { width: 100%; }
.rounded-lg { border-radius: var(--radius-lg); }

/* Berater-only content */
.berater-only {
  transition: all var(--transition-base);
}

body.kunden-modus .berater-only {
  display: none !important;
}

/* --- Print Styles --- */
@media print {
  .header, .footer, .mode-toggle, .nav-tabs, .btn, .no-print {
    display: none !important;
  }
  .main { margin-top: 0; }
  .module { display: block !important; page-break-after: always; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --font-size-hero: 2.2rem;
    --font-size-4xl: 1.8rem;
    --font-size-3xl: 1.5rem;
  }

  .header-inner {
    padding: 0 var(--space-4);
  }

  .nav-tabs {
    display: none;
  }

  .mobile-nav {
    display: flex !important;
  }

  .section {
    padding: var(--space-10) var(--space-4);
  }

  .hero {
    padding: var(--space-12) var(--space-4) var(--space-8);
  }

  .card {
    padding: var(--space-5);
  }

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

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

  .co2-comparison {
    grid-template-columns: 1fr;
  }

  .ranking-item {
    flex-direction: column;
  }

  .ranking-badge {
    width: 100%;
    min-height: 40px;
  }

  .ranking-image {
    width: 100%;
    height: 150px;
  }

  .ranking-score {
    width: 100%;
    padding: var(--space-3);
  }

  .detail-panel {
    width: 100%;
    max-width: 100vw;
  }
}

/* Mobile bottom nav */
.mobile-nav {
  display: none !important;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(251, 251, 253, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  justify-content: space-around;
}

.mobile-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2);
  background: none;
  border: none;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  cursor: pointer;
  font-family: inherit;
}

.mobile-nav-btn.active {
  color: var(--color-primary);
}

.mobile-nav-btn .nav-icon {
  font-size: 1.3rem;
}

/* --- Animations --- */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-slide-up {
  animation: slideUp 0.6s cubic-bezier(0.25, 0.1, 0.25, 1) both;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* Loading state */
.skeleton {
  background: linear-gradient(90deg, var(--color-surface-secondary) 25%, var(--color-surface-tertiary) 50%, var(--color-surface-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   Bauteil-Info Cards (NEU)
   ========================================================================== */
.bauteil-info-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 132, 61, 0.15);
}

.bauteil-info-card.compact {
  padding: var(--space-4);
  gap: var(--space-4);
}

.bauteil-info-image {
  width: 240px;
  height: 180px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-surface-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.bauteil-info-image.small {
  width: 180px;
  height: 135px;
}

.bauteil-info-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bauteil-info-image .placeholder-icon {
  font-size: 2.5rem;
  opacity: 0.5;
}

.bauteil-info-content h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.bauteil-info-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.bauteil-info-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.bauteil-info-count {
  font-size: var(--font-size-sm);
  color: var(--color-primary-dark);
  margin-top: var(--space-2);
}

/* Ranking description */
.ranking-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Maßnahmen-Info im Ergebnis */
.result-massnahme-info {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.result-massnahme-image {
  width: 220px;
  height: 165px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-surface-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-massnahme-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.result-massnahme-image .placeholder-icon {
  font-size: 2rem;
  opacity: 0.4;
}

.result-massnahme-text h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.result-massnahme-text p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

.result-massnahme-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

/* Bauteil-Eignung im Detail-Panel */
.bauteil-eignung-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.bauteil-eignung-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.bauteil-eignung-icon {
  font-size: 1.2rem;
}

/* Maßnahmen-Hint im Fahrplan */
.massnahme-hint {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-3);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

/* Material-Container im Wirtschaftsrechner */
#wb-material-container {
  padding: var(--space-4);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  border: 1px dashed var(--color-border-strong);
}

#wb-material-container .form-label {
  color: var(--color-accent);
}

/* Responsive for bauteil info */
@media (max-width: 768px) {
  .bauteil-info-card {
    flex-direction: column;
  }
  .bauteil-info-image,
  .bauteil-info-image.small {
    width: 100%;
    height: 150px;
  }
  .result-massnahme-info {
    flex-direction: column;
  }
  .result-massnahme-image {
    width: 100%;
    height: 150px;
  }
  .ranking-image {
    display: none;
  }

  /* Hero mit Buchempfehlung - mobile Ansicht */
  .hero[style*="position: relative"] > div[style*="position: absolute"] {
    position: static !important;
    width: 100% !important;
    max-width: 350px !important;
    margin: 2rem auto 0 !important;
    right: auto !important;
  }
}