:root {
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
  --font-secondary: "Georgia", "Times New Roman", serif;

  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-h1: 3rem;
  --font-size-h2: 2.25rem;
  --font-size-h3: 1.5rem;

  --line-height-base: 1.6;
  --line-height-heading: 1.2;

  --space-xxs: 0.25rem;
  --space-xs: 0.5rem;
  --space-s: 1rem;
  --space-m: 1.5rem;
  --space-l: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  --transition-fast: 0.2s ease-in-out;
  --transition-medium: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.6s ease;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);

  --color-primary-hue: 210;
  --color-secondary-hue: 260;
  --color-accent-hue: 340;

  --color-primary: hsl(var(--color-primary-hue), 70%, 50%);
  --color-primary-light: hsl(var(--color-primary-hue), 70%, 65%);
  --color-primary-dark: hsl(var(--color-primary-hue), 70%, 40%);

  --color-background: hsl(0, 0%, 100%);
  --color-surface: hsl(0, 0%, 97%);
  --color-surface-secondary: hsl(0, 0%, 94%);
  --color-text: hsl(var(--color-primary-hue), 10%, 20%);
  --color-text-muted: hsl(var(--color-primary-hue), 10%, 45%);
  --color-border: hsl(var(--color-primary-hue), 15%, 85%);
  --color-white: hsl(0, 0%, 100%);
  --color-black: hsl(0, 0%, 0%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: hsl(var(--color-primary-hue), 60%, 55%);
    --color-primary-light: hsl(var(--color-primary-hue), 60%, 70%);
    --color-primary-dark: hsl(var(--color-primary-hue), 60%, 45%);

    --color-background: hsl(var(--color-primary-hue), 10%, 10%);
    --color-surface: hsl(var(--color-primary-hue), 10%, 15%);
    --color-surface-secondary: hsl(var(--color-primary-hue), 10%, 20%);
    --color-text: hsl(var(--color-primary-hue), 15%, 90%);
    --color-text-muted: hsl(var(--color-primary-hue), 10%, 65%);
    --color-border: hsl(var(--color-primary-hue), 10%, 30%);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  transition: background-color var(--transition-medium),
    color var(--transition-medium);
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-text);
  margin-top: 0;
  margin-bottom: var(--space-m);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--space-m);
  max-width: 75ch;
}

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

a:hover,
a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul,
ol {
  list-style-position: inside;
  margin-bottom: var(--space-m);
  padding-left: var(--space-s);
}

li {
  margin-bottom: var(--space-xs);
}

ul > li::marker {
  color: var(--color-primary);
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-m);
  margin: var(--space-l) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-m);
  padding-right: var(--space-m);
}

.text-center {
  text-align: center;
}

.full-width {
  width: 100%;
}

.section-title {
  margin-bottom: var(--space-s);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 80ch;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-xl);
}

main > section {
  padding-top: var(--space-xxl);
  padding-bottom: var(--space-xxl);
}

main > section:nth-child(odd) {
  background-color: var(--color-surface);
}

.button {
  display: inline-block;
  padding: var(--space-s) var(--space-l);
  font-weight: 600;
  text-align: center;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: transform var(--transition-fast),
    background-color var(--transition-fast), box-shadow var(--transition-fast);
  border: 2px solid transparent;
  user-select: none;
  text-decoration: none;
}

.button:hover,
.button:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

.primary-button:hover,
.primary-button:focus {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
}

.secondary-button {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.secondary-button:hover,
.secondary-button:focus {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.large-button {
  padding: var(--space-m) var(--space-xl);
  font-size: var(--font-size-lg);
}

.site-header {
  background-color: var(--color-background);
  padding: var(--space-s) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-medium);
}

.main-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover,
.logo:focus {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: var(--space-l);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-menu li a {
  color: var(--color-text-muted);
  font-weight: 500;
  padding: var(--space-xs) 0;
  position: relative;
  text-decoration: none;
}

.nav-menu li a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-menu li a:hover,
.nav-menu li a:focus,
.nav-menu li a.active {
  color: var(--color-text);
}

.nav-menu li a:hover::after,
.nav-menu li a:focus::after,
.nav-menu li a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hero-section {
  padding: var(--space-xxl) 0;
  background-color: var(--color-surface);
}

.hero-section .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-content h1 {
  margin-bottom: var(--space-m);
}

.hero-content .subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 65ch;
}

.hero-cta {
  display: flex;
  gap: var(--space-m);
  flex-wrap: wrap;
}

.hero-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
}

.feature-section {
  background-color: var(--color-background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.feature-item {
  background-color: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-medium),
    box-shadow var(--transition-medium);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  color: var(--color-primary);
  margin-bottom: var(--space-m);
}

.feature-item h3 {
  margin-bottom: var(--space-s);
}

.content-section .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

.content-text-block ul {
  list-style-type: none;
  padding-left: 0;
}

.content-text-block ul li {
  padding-left: var(--space-l);
  position: relative;
  margin-bottom: var(--space-s);
}

.content-text-block ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.content-image-block img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.steps-section {
  background-color: var(--color-surface);
}

.steps-container {
  display: grid;
  gap: var(--space-xl);
  position: relative;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-m);
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content h3 {
  margin-bottom: var(--space-xs);
}

.case-study-section {
  background-color: var(--color-background);
}

.case-study-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
}

.case-study-text h4 {
  color: var(--color-primary);
  margin-top: var(--space-l);
  margin-bottom: var(--space-s);
}

.case-study-text ul {
  list-style-type: disc;
  padding-left: var(--space-l);
}

.case-study-quote {
  background-color: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--border-radius-md);
  border-left: 5px solid var(--color-primary);
}

.case-study-quote blockquote {
  margin: 0;
  padding: 0;
  border: none;
  font-style: normal;
}

.case-study-quote p {
  font-size: var(--font-size-lg);
  line-height: 1.5;
}

.case-study-quote footer {
  margin-top: var(--space-m);
  font-weight: 600;
  color: var(--color-text);
}

.pricing-section {
  background-color: var(--color-surface);
}

.pricing-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  align-items: stretch;
}

.pricing-plan {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-medium),
    box-shadow var(--transition-medium);
  position: relative;
}

.pricing-plan.recommended {
  border-color: var(--color-primary);
  border-width: 2px;
  transform: scale(1.05);
}

.pricing-plan.recommended::before {
  content: "Najpopularniejszy";
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-s);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
}

.pricing-plan h3 {
  text-align: center;
  color: var(--color-primary);
}

.price {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xs);
}

.price .period {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  font-weight: 400;
}

.plan-description {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--space-l);
  flex-grow: 1;
}

.plan-features {
  list-style-type: none;
  padding-left: 0;
  margin-bottom: var(--space-xl);
  flex-grow: 2;
}

.plan-features li {
  padding-left: var(--space-l);
  position: relative;
  margin-bottom: var(--space-s);
}

.plan-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.plan-features li strong {
  font-weight: 600;
  color: var(--color-text);
}

.pricing-plan .button {
  margin-top: auto;
}

.testimonials-section {
  background-color: var(--color-background);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.testimonial-card {
  background-color: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  position: relative;
}

.testimonial-card::before {
  content: "“";
  position: absolute;
  top: var(--space-s);
  left: var(--space-m);
  font-size: 5rem;
  color: var(--color-primary);
  opacity: 0.1;
  line-height: 1;
}

.testimonial-card p {
  font-style: italic;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  margin-top: var(--space-m);
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
}

.author-role {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.team-section {
  background-color: var(--color-surface);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.team-member {
  background-color: var(--color-background);
  padding: var(--space-xl);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  text-align: center;
}

.team-member h3 {
  margin-bottom: var(--space-xs);
}

.member-role {
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-s);
}

.team-member p:last-child {
  margin-bottom: 0;
}

.faq-section {
  background-color: var(--color-background);
}

.faq-accordion {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.faq-accordion details {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-m) 0;
}

.faq-accordion details:first-of-type {
  border-top: 1px solid var(--color-border);
}

.faq-accordion summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-accordion summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--color-primary);
}

details[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding-top: var(--space-m);
  color: var(--color-text-muted);
}

.faq-content p {
  margin-bottom: 0;
}

.faq-more-link {
  text-align: center;
  margin-top: var(--space-xl);
}

.cta-form-section {
  background: linear-gradient(
    135deg,
    hsl(var(--color-primary-hue), 70%, 55%),
    hsl(var(--color-secondary-hue), 60%, 50%)
  );
  color: var(--color-white);
}

.cta-form-section h2 {
  color: var(--color-white);
}

.cta-form-section .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.quick-register-form {
  background-color: var(--color-background);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.quick-register-form h3 {
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--space-m);
}

.form-group {
  margin-bottom: var(--space-m);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-group input {
  width: 100%;
  padding: var(--space-s);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px hsla(var(--color-primary-hue), 70%, 50%, 0.3);
}

.form-terms {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-m);
  margin-bottom: 0;
}

.form-terms a {
  color: var(--color-primary);
  text-decoration: underline;
}

.form-thank-you {
  background-color: var(--color-background);
  color: var(--color-text);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.form-thank-you h3 {
  color: var(--color-primary);
}

.site-footer {
  background-color: var(--color-surface-secondary);
  padding-top: var(--space-xxl);
  padding-bottom: var(--space-l);
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-column h4 {
  color: var(--color-text);
  margin-bottom: var(--space-m);
  font-size: var(--font-size-lg);
}

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

.footer-column ul li {
  margin-bottom: var(--space-xs);
}

.footer-column ul a {
  color: var(--color-text-muted);
}

.footer-column ul a:hover,
.footer-column ul a:focus {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-column.contact p {
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-l);
  text-align: center;
  font-size: var(--font-size-sm);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: none;
}

.animate-on-scroll.fade-in {
  animation: fadeIn var(--transition-slow) forwards;
}

.animate-on-scroll.slide-up {
  transform: translateY(30px);
}

.animate-on-scroll.slide-up.is-visible {
  transform: translateY(0);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface-secondary);
  color: var(--color-text);
  padding: var(--space-m);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 2000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-m);
  transform: translateY(100%);
  animation: slideInUp 0.5s forwards;
}

.cookie-banner-content p {
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

.cookie-banner-content a {
  color: var(--color-primary);
  text-decoration: underline;
}

.cookie-banner.hide {
  animation: slideOutDown 0.5s forwards;
}

@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes slideOutDown {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(100%);
  }
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.mobile-menu-toggle .icon-menu,
.mobile-menu-toggle .icon-close {
  width: 28px;
  height: 28px;
  color: var(--color-text);
}

.mobile-menu-toggle .icon-close {
  display: none;
}

.nav-open .icon-menu {
  display: none;
}

.nav-open .icon-close {
  display: block;
}

@media (max-width: 1024px) {
  .pricing-plan.recommended {
    transform: scale(1);
  }
}

@media (max-width: 850px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-column.about,
  .footer-column.contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
  }

  main > section {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .mobile-menu-toggle {
    display: block;
  }

  .site-header .primary-button {
    display: none;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background-color: var(--color-background);
    flex-direction: column;
    padding: var(--space-xxl) var(--space-l);
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    gap: 0;
  }

  .nav-menu.is-open {
    transform: translateX(0);
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu li a {
    display: block;
    padding: var(--space-m) 0;
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu li a::after {
    display: none;
  }

  .hero-section .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-cta {
    justify-content: center;
  }

  .content-section .container {
    grid-template-columns: 1fr;
  }

  .cta-form-section .container {
    grid-template-columns: 1fr;
  }

  .pricing-table {
    grid-template-columns: 1fr;
  }

  .cookie-banner {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 769px) {
  .content-section .container {
    grid-template-columns: 1fr 1fr;
  }

  .steps-container {
    grid-template-columns: 1fr 1fr;
  }

  .case-study-content {
    grid-template-columns: 1.5fr 1fr;
  }

  .cta-form-section .container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1025px) {
  .hero-section .container {
    grid-template-columns: 1.2fr 1fr;
    text-align: left;
  }

  .hero-image {
    order: 1;
  }

  .hero-cta {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-h1: 2rem;
    --font-size-h2: 1.75rem;
  }

  .container {
    padding-left: var(--space-s);
    padding-right: var(--space-s);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .button {
    width: 100%;
    max-width: 300px;
  }

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