/* ============================================
   SOLAR KOSTEN-RECHNER - STYLE.CSS
   App/Tool Aesthetic Design
   ============================================ */

/* --- CSS Variables --- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --accent: #22d3ee;
  --accent-dark: #06b6d4;
  --dark: #312e81;
  --dark-deeper: #1e1b4b;
  --light: #eef2ff;
  --light-alt: #e0e7ff;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --font-mono: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--gray-700);
  background: var(--light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  color: var(--dark);
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover { color: var(--accent-dark); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol { padding-left: 1.5em; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: 860px;
}

/* --- Header / Navigation --- */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.92);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  padding: 0;
}

.nav-links a {
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav-cta {
  background: var(--primary);
  color: var(--white) !important;
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--primary-dark);
  color: var(--white) !important;
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--dark);
  cursor: pointer;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, rgba(30,27,75,0.85) 0%, rgba(49,46,129,0.85) 50%, rgba(79,70,229,0.85) 100%), url('../images/hero.png') center/cover no-repeat;
  padding: 5rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.hero h1 {
  color: var(--white);
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: var(--accent);
}

.hero-sub {
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  justify-content: center;
}

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

.btn--primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99,102,241,0.35);
}

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

.btn--accent:hover {
  background: var(--accent-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34,211,238,0.35);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}

.btn--outline-dark {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.btn--lg {
  padding: 1rem 2.2rem;
  font-size: 1rem;
}

.btn--sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.8rem;
}

/* --- Calculator Section --- */
.calculator-section {
  padding: 5rem 0;
  background: var(--white);
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header .overline {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-header p {
  max-width: 600px;
  margin: 0.8rem auto 0;
  color: var(--gray-500);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.calc-inputs {
  background: var(--light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--gray-200);
}

.calc-group {
  margin-bottom: 1.5rem;
}

.calc-group:last-child {
  margin-bottom: 0;
}

.calc-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.calc-label span {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--gray-700);
}

.calc-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--primary);
  background: var(--white);
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
}

.calc-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--gray-200);
  outline: none;
  transition: background var(--transition);
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(99,102,241,0.4);
  transition: transform var(--transition);
}

.calc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(99,102,241,0.4);
}

.calc-select {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  background: var(--white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--gray-700);
  cursor: pointer;
  transition: border-color var(--transition);
}

.calc-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.calc-results {
  background: linear-gradient(135deg, var(--dark-deeper), var(--dark));
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: var(--white);
  position: sticky;
  top: 90px;
}

.calc-results-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.calc-results-header h3 {
  color: var(--white);
  font-size: 1.1rem;
}

.result-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  margin-bottom: 1rem;
}

.result-card:last-child {
  margin-bottom: 0;
}

.result-card__label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.3rem;
}

.result-card__value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.result-card__value small {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  font-weight: 400;
}

.result-card--highlight {
  background: rgba(34,211,238,0.1);
  border-color: rgba(34,211,238,0.3);
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.88rem;
}

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

.result-row span:first-child { color: rgba(255,255,255,0.6); }
.result-row span:last-child {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--white);
}

.calc-cta {
  margin-top: 1.5rem;
}

.calc-cta .btn {
  width: 100%;
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--white);
  padding: 3rem 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* --- Feature Cards --- */
.features-section {
  padding: 5rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.2rem;
  color: var(--primary);
}

.feature-card h4 {
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* --- Data Table Style --- */
.cost-table-section {
  padding: 5rem 0;
  background: var(--white);
}

.cost-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.cost-table thead {
  background: var(--dark);
}

.cost-table th {
  padding: 1rem 1.2rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cost-table td {
  padding: 0.9rem 1.2rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--gray-100);
}

.cost-table tbody tr {
  background: var(--white);
  transition: background var(--transition);
}

.cost-table tbody tr:hover {
  background: var(--light);
}

.cost-table tbody tr:last-child td {
  border-bottom: none;
}

.cost-table .mono {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--dark);
}

.cost-table .accent {
  color: var(--primary);
  font-weight: 700;
}

/* --- Blog Cards --- */
.blog-section {
  padding: 5rem 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.blog-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-card__img {
  height: 180px;
  background: linear-gradient(135deg, var(--primary), var(--dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 2.5rem;
  position: relative;
  overflow: hidden;
}

.blog-card__img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(transparent, rgba(0,0,0,0.2));
}

.blog-card__body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.blog-card__title {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.blog-card__excerpt {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
  flex: 1;
}

.blog-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 1rem;
}

.blog-card__link:hover {
  gap: 0.6rem;
}

/* --- CTA Section --- */
.cta-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--dark-deeper), var(--primary-dark));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(34,211,238,0.1) 0%, transparent 60%);
  border-radius: 50%;
}

.cta-content {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255,255,255,0.65);
  max-width: 550px;
  margin: 0 auto 2rem;
}

/* --- Contact Form --- */
.contact-section {
  padding: 5rem 0;
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  background: var(--light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--gray-200);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--gray-700);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  background: var(--white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--gray-700);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--gray-500);
}

.form-check input[type="checkbox"] {
  width: auto;
  margin-top: 0.2rem;
}

.contact-info {
  padding: 1rem 0;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.info-icon {
  width: 40px;
  height: 40px;
  background: var(--light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}

.info-item h4 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.info-item p {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* --- Footer --- */
.site-footer {
  background: var(--gray-900);
  color: rgba(255,255,255,0.5);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.7;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
}

.footer-bottom a:hover { color: var(--accent); }

/* --- Blog Page --- */
.page-header {
  background: linear-gradient(135deg, var(--dark-deeper), var(--dark));
  padding: 4rem 0;
  text-align: center;
}

.page-header h1 {
  color: var(--white);
  margin-bottom: 0.8rem;
}

.page-header p {
  color: rgba(255,255,255,0.6);
  max-width: 600px;
  margin: 0 auto;
}

.blog-listing {
  padding: 4rem 0;
}

.blog-listing .blog-grid {
  margin-bottom: 2rem;
}

/* --- Blog Post / Article --- */
.article-header {
  background: linear-gradient(135deg, var(--dark-deeper), var(--primary-dark));
  padding: 4rem 0 3rem;
  text-align: center;
}

.article-header h1 {
  color: var(--white);
  max-width: 750px;
  margin: 0 auto 1rem;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
}

.article-header .breadcrumb {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.5rem;
}

.article-header .breadcrumb a {
  color: rgba(255,255,255,0.5);
}

.article-header .breadcrumb a:hover { color: var(--accent); }

.article-body {
  padding: 3rem 0 5rem;
}

.article-content {
  max-width: 780px;
  margin: 0 auto;
}

.article-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--light);
}

.article-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

.article-content p {
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.8;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.2rem;
}

.article-content li {
  margin-bottom: 0.4rem;
  line-height: 1.7;
}

.article-content strong {
  color: var(--dark);
}

.article-content blockquote {
  background: var(--light);
  border-left: 4px solid var(--primary);
  padding: 1.2rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--gray-600);
}

.article-content .info-box {
  background: var(--light);
  border: 1px solid var(--light-alt);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.article-content .info-box h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-content .data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.article-content .data-table th,
.article-content .data-table td {
  padding: 0.7rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.article-content .data-table th {
  background: var(--dark);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}

.article-content .data-table tbody tr:hover {
  background: var(--light);
}

.article-content .data-table .mono {
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Article CTA box */
.article-cta {
  background: linear-gradient(135deg, var(--dark-deeper), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  margin: 3rem 0;
}

.article-cta h3 {
  color: var(--white);
  margin-bottom: 0.8rem;
}

.article-cta p {
  color: rgba(255,255,255,0.65);
  margin-bottom: 1.5rem;
}

/* Related posts */
.related-posts {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--light);
}

.related-posts h3 {
  margin-bottom: 1.5rem;
}

/* --- Wissen Page --- */
.wissen-section {
  padding: 4rem 0;
}

.wissen-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.wissen-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.wissen-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.wissen-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.wissen-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.wissen-card .btn {
  font-size: 0.8rem;
}

/* --- FAQ Section --- */
.faq-section {
  padding: 5rem 0;
  background: var(--white);
}

.faq-list {
  max-width: 750px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: var(--white);
  border: none;
  padding: 1.2rem 1.5rem;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--light);
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--primary);
  transition: transform var(--transition);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.2rem;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* --- Legal Pages --- */
.legal-section {
  padding: 4rem 0;
}

.legal-content {
  max-width: 780px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 3rem;
  border: 1px solid var(--gray-200);
}

.legal-content h2 {
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
}

.legal-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
  font-size: 1.1rem;
}

.legal-content p {
  margin-bottom: 1rem;
  font-size: 0.92rem;
}

.legal-content ul {
  margin-bottom: 1rem;
}

.legal-content li {
  margin-bottom: 0.3rem;
  font-size: 0.92rem;
}

/* --- Utilities --- */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tag--primary {
  background: var(--light);
  color: var(--primary);
}

.tag--accent {
  background: rgba(34,211,238,0.1);
  color: var(--accent-dark);
}

.divider {
  height: 1px;
  background: var(--gray-200);
  margin: 2rem 0;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calc-results { position: static; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--gray-200);
  }

  .hero { padding: 3rem 0 4rem; }
  .features-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .wissen-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .hero-actions { flex-direction: column; align-items: center; }
  .cost-table { font-size: 0.82rem; }
  .cost-table th, .cost-table td { padding: 0.6rem 0.7rem; }
  .legal-content { padding: 1.5rem; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { padding: 0.5rem 0; }
}


/* === Mobile Logo Size === */
@media (max-width: 768px) {
  .logo img, .nav-logo img, .navbar-brand img, .nav-brand img, .navbar__logo img {
    height: 36px !important;
  }
}