:root {
  color-scheme: light;
  --color-primary: #2563eb;
  --color-secondary: #0f172a;
  --color-accent: #10b981;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-soft: 0 20px 40px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 10px 30px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-secondary);
  line-height: 1.6;
  min-height: 100vh;
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

main {
  display: block;
}

.section {
  padding: 2.5rem 1.5rem;
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
}

.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 55%, #2563eb 100%);
  color: #ffffff;
  padding: 3rem 1.5rem 4rem;
  border-radius: 0 0 32px 32px;
}

.hero__grid {
  display: grid;
  gap: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  margin: 0 0 0.5rem;
}

.hero p {
  margin: 0 0 1.5rem;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.85);
}

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

.button,
.btn {
  border: none;
  cursor: pointer;
  padding: 0.9rem 1.4rem;
  font-size: 1rem;
  border-radius: var(--radius-md);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #0f172a;
  box-shadow: var(--shadow-card);
}

.btn-primary:hover,
.btn-outline:hover {
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #ffffff;
  background: transparent;
}

.hero-metrics {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-top: 2rem;
}

.metric-card {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 1rem 1rem 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 600;
}

.metric-label {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
}

.hero-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 260px;
  background: rgba(15, 23, 42, 0.4);
  box-shadow: var(--shadow-soft);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.2);
}

.section-title {
  margin-bottom: 1rem;
  font-size: 1.75rem;
  font-weight: 600;
}

.detail-grid {
  display: grid;
  gap: 1.5rem;
}

.profile-grid,
.challenge-grid {
  gap: 1rem;
}

.profile-card,
.challenge-card,
.module-card,
.roi-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.profile-card ul,
.challenge-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.profile-card li,
.challenge-card li {
  display: flex;
  gap: 0.7rem;
  font-weight: 500;
}

.profile-card li svg,
.challenge-card li svg {
  font-size: 1rem;
  color: var(--color-primary);
  margin-top: 0.2rem;
}

.challenge-card li span {
  color: var(--color-secondary);
}

.challenge-card {
  background: #fff6f5;
  border-color: #fecaca;
}

.transform-section {
  background: #111827;
  color: #f8fafc;
  border-radius: 24px;
  padding: 2rem;
  box-shadow: var(--shadow-soft);
}

.transform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.transform-card {
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.transform-card strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.transform-card p {
  margin: 0;
  font-weight: 500;
}

.transform-results {
  margin-top: 1.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.module-card h3 {
  margin: 0.4rem 0 0.4rem;
  font-size: 1.1rem;
}

.module-card p {
  margin: 0;
  color: var(--color-muted);
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.accordion-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.accordion-header {
  background: #0f172a;
  color: #ffffff;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.accordion-header .icon {
  transition: transform 0.2s ease;
}

/* scripts.js przelacza te klase, ale zadna regula jej nie opisywala. */
.accordion-header .icon.rotate {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 1rem;
  background: #f8fafc;
}

.accordion-body.active {
  padding: 1rem;
  max-height: 400px;
}

.roi-breakdown {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(16, 185, 129, 0.15));
  border-radius: 28px;
  padding: 2rem 1.2rem;
}

.roi-grid {
  display: grid;
  gap: 1rem;
}

.roi-card header {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.8rem;
}

.roi-card strong {
  font-size: 1.4rem;
}

.roi-callout {
  margin-top: 1.5rem;
  padding: 1.2rem 1.4rem;
  background: #0f172a;
  color: #ffffff;
  border-radius: var(--radius-lg);
  font-size: 1.1rem;
  text-align: center;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid var(--color-border);
}

.timeline-marker {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.portal-section,
.testimonial-section,
.target-section,
.comparison-section,
.calculator-section,
.faq-section,
.related-section {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
}

.portal-grid,
.target-grid,
.contact-grid,
.related-grid {
  display: grid;
  gap: 1rem;
}

.portal-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.portal-list,
.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.portal-list li span,
.check-list li span {
  font-weight: 500;
}

.portal-list li::before,
.check-list li::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 24px;
  margin-right: 0.5rem;
}

.portal-list li::before {
  background: url('data:image/svg+xml;utf8,<svg fill="%2310b981" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 13l4 4L19 7"/></svg>') no-repeat center/contain;
}

.check-list li::before {
  background: url('data:image/svg+xml;utf8,<svg fill="%23f97316" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M6 6l12 12M18 6L6 18"/></svg>') no-repeat center/contain;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 0.85rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.comparison-table th {
  background: #f1f5f9;
}

.comparison-table .highlight {
  background: rgba(16, 185, 129, 0.15);
  font-weight: 600;
}

.roi-calculator {
  display: grid;
  gap: 1.1rem;
}

.roi-calculator label {
  display: flex;
  justify-content: space-between;
  font-weight: 500;
  font-size: 0.95rem;
}

.roi-calculator input[type='range'] {
  width: 100%;
  accent-color: var(--color-primary);
}

.roi-calculator input[type='number'],
.roi-calculator select,
.roi-calculator textarea {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: 0.9rem;
  font-size: 1rem;
  font-family: inherit;
}

.calculator-result {
  margin-top: 1rem;
  padding: 1.4rem;
  background: #0f172a;
  color: #ffffff;
  border-radius: var(--radius-md);
  text-align: center;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-grid select,
.contact-grid input:not([type="checkbox"]):not([type="radio"]) {
  width: 100%;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: 0.9rem;
  font-size: 1rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.contact-form .success-message {
  display: none;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: #d1fae5;
  color: #064e3b;
  font-weight: 600;
}

.contact-form .success-message.show {
  display: block;
}

.related-grid article {
  background: #f1f5f9;
  border-radius: var(--radius-md);
  padding: 1.2rem;
  border: 1px solid var(--color-border);
}

.footer-case {
  padding: 2rem 1.5rem;
  background: #0f172a;
  color: #f1f5f9;
}

.footer-case nav,
.footer-case ul {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-case a {
  color: #f1f5f9;
}

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
  }

  .detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .roi-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .portal-grid,
  .contact-grid,
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 4rem 0 4.5rem;
  }

  .detail-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .portal-grid,
  .related-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .final-cta {
    padding: 3rem;
  }
}

@media (min-width: 1440px) {
  .container {
    max-width: 1280px;
  }

  .hero {
    border-radius: 0 0 44px 44px;
  }
}