/* ==========================================================================
   AeroKrak - Anti-smog vents & air purifiers for Krakow tenement apartments
   Design System & Strict Color Theme:
   - Page Background: #FFFFFF
   - Section Gray:    #E8F1FB
   - Ink:             #1A2332
   - Corporate Accent:#1565C0
   - Typography:      Montserrat (Headings & Body)
   - Buttons:         Moderate pill radius
   ========================================================================== */

:root {
  --color-bg: #FFFFFF;
  --color-section-gray: #E8F1FB;
  --color-ink: #1A2332;
  --color-accent: #1565C0;
  --color-accent-hover: #0D47A1;
  --color-accent-light: rgba(21, 101, 192, 0.08);
  --color-border: #D1E1F3;
  --color-muted: #53647C;
  --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-pill: 30px;
  --radius-card: 12px;
  --transition: all 0.25s ease-in-out;
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-family);
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.25;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

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

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

ul {
  list-style: none;
}

/* Layout Helpers */
.container {
  width: 100%;
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

/* Pill Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  line-height: 1.2;
}

.btn-pill {
  border-radius: var(--radius-pill);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(21, 101, 192, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(21, 101, 192, 0.3);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-block {
  width: 100%;
}

/* 1. Header (Sticky) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(26, 35, 50, 0.04);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
  text-decoration: none;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--color-ink);
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-ink);
  padding: 6px 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink);
  transition: var(--transition);
}

/* 2. Hero Section */
.hero-section {
  padding: 72px 0 64px;
  background-color: #FFFFFF;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.badge-pill {
  display: inline-block;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.6rem;
  letter-spacing: -0.8px;
  margin-bottom: 20px;
  color: var(--color-ink);
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin-bottom: 32px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.trust-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-stars {
  color: #FFA000;
  letter-spacing: 1px;
  font-size: 1rem;
}

.trust-badge-icon {
  color: var(--color-accent);
  display: inline-flex;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.trust-divider {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
}

/* Hero Corporate-Color Panel */
.hero-panel {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: 0 16px 36px rgba(21, 101, 192, 0.22);
}

.panel-title {
  color: #FFFFFF;
  font-size: 1.45rem;
  margin-bottom: 8px;
}

.panel-subtitle {
  color: #E3F2FD;
  font-size: 0.92rem;
  margin-bottom: 24px;
}

.panel-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel-list-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.panel-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background-color: rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  margin-top: 2px;
}

.panel-list-item strong {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 3px;
}

.panel-list-item p {
  font-size: 0.86rem;
  color: #E3F2FD;
  line-height: 1.4;
  margin: 0;
}

/* Section Headers */
.section-header {
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.1rem;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-muted);
}

/* 3. Services Grid: Exactly 8 Cards */
.services-section {
  padding: 84px 0;
  background-color: #FFFFFF;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(21, 101, 192, 0.08);
}

.service-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background-color: var(--color-section-gray);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-title {
  font-size: 1.12rem;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.service-text {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.55;
  margin: 0;
}

/* 4. About Section (Alternating Background: #E8F1FB) */
.about-section {
  padding: 88px 0;
  background-color: var(--color-section-gray);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.about-lead {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 18px;
}

.about-text-col p {
  color: var(--color-muted);
  margin-bottom: 22px;
}

.about-check-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.about-check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink);
}

.check-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.facts-block {
  background-color: var(--color-accent);
  border-radius: var(--radius-card);
  padding: 36px 32px;
  color: #FFFFFF;
  box-shadow: 0 16px 32px rgba(21, 101, 192, 0.18);
}

.facts-heading {
  color: #FFFFFF;
  font-size: 1.35rem;
  margin-bottom: 28px;
  text-align: center;
}

.facts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.fact-card {
  background-color: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 20px 16px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.fact-number {
  display: block;
  font-size: 2.1rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.1;
  margin-bottom: 6px;
}

.fact-label {
  font-size: 0.8rem;
  color: #E3F2FD;
  line-height: 1.35;
  display: block;
}

/* 5. Testimonials (3 Cards) */
.testimonials-section {
  padding: 84px 0;
  background-color: #FFFFFF;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 16px rgba(26, 35, 50, 0.04);
  position: relative;
}

.rating-stars {
  color: #FFA000;
  font-size: 1.1rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-text {
  font-size: 0.94rem;
  color: var(--color-ink);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 24px;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}

.author-avatar-shape {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.author-location {
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* 6. Contact Split */
.contact-section {
  padding: 84px 0;
  background-color: var(--color-section-gray);
}

.contact-split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: flex-start;
}

.contact-desc {
  color: var(--color-muted);
  margin-bottom: 32px;
  font-size: 1rem;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: #FFFFFF;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.detail-title {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  margin-bottom: 2px;
}

.detail-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0;
}

.social-block {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.social-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.social-links-row {
  display: flex;
  gap: 12px;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #FFFFFF;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.social-btn:hover {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* Form Card */
.form-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: 0 8px 30px rgba(26, 35, 50, 0.06);
  border: 1px solid var(--color-border);
}

.form-title {
  font-size: 1.45rem;
  margin-bottom: 6px;
}

.form-intro {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink);
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-family);
  font-size: 0.92rem;
  color: var(--color-ink);
  background-color: #FFFFFF;
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.12);
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

.form-consent {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--color-accent);
}

.form-error {
  display: none;
  font-size: 0.76rem;
  color: #D32F2F;
  font-weight: 500;
}

.form-error.visible {
  display: block;
}

.form-success {
  display: none;
  background-color: #E8F5E9;
  color: #2E7D32;
  padding: 14px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  text-align: center;
  border: 1px solid #A5D6A7;
}

.form-success.visible {
  display: block;
}

/* 7. Footer */
.site-footer {
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  padding-top: 56px;
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-desc {
  color: var(--color-muted);
  font-size: 0.9rem;
  max-width: 380px;
  line-height: 1.6;
}

.footer-col-title {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--color-ink);
}

.footer-links-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-col a {
  font-size: 0.88rem;
  color: var(--color-muted);
}

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

.footer-location-text {
  font-size: 0.88rem;
  color: var(--color-muted);
}

.footer-bottom {
  background-color: var(--color-section-gray);
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
}

.footer-bottom-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--color-muted);
  flex-wrap: wrap;
  gap: 12px;
}

.copyright {
  margin: 0;
}

.footer-note {
  margin: 0;
}

/* Privacy Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(26, 35, 50, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.modal-overlay.open {
  display: flex;
}

.modal-dialog {
  background-color: #FFFFFF;
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 650px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.modal-heading {
  font-size: 1.3rem;
  margin: 0;
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-muted);
  line-height: 1;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 0.88rem;
  color: var(--color-ink);
}

.modal-body p {
  margin-bottom: 16px;
}

.modal-body ul {
  list-style: disc;
  margin-left: 20px;
  margin-bottom: 16px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-grid,
  .about-grid,
  .contact-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    padding: 20px 24px;
    display: none;
  }

  .main-nav.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .mobile-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .hero-title {
    font-size: 2.1rem;
  }

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

  .form-row-2col {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 480px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .trust-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .trust-divider {
    display: none;
  }
}