/* Volumna SOA – Geometric Structured CSS Theme */

:root {
  --color-primary: #1B2536;
  --color-secondary: #2D8BBA;
  --color-accent: #F1F3F6;
  --color-white: #fff;
  --color-black: #111;
  --color-grey: #e5e8ef;
  --color-shadow: rgba(27,37,54,0.07);
  --radius-card: 18px;
  --radius-btn: 8px;
  --shadow-card: 0 4px 24px var(--color-shadow);
  --transition: 0.25s cubic-bezier(.77,0,.175,1);
  --font-display: 'Montserrat', 'Arial', sans-serif;
  --font-body: 'Roboto', 'Arial', sans-serif;
  --font-weight-bold: 700;
  --font-weight-medium: 600;
  --font-weight-regular: 400;
  --header-height: 72px;
  --z-mobile-menu: 1000;
  --z-cookie-banner: 2000;
}

/* 1. Base Styles */
html {
  box-sizing: border-box;
  font-size: 16px;
  scroll-behavior: smooth;
}
*, *:before, *:after {
  box-sizing: inherit;
}
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-primary);
  background: var(--color-accent);
  min-height: 100vh;
  line-height: 1.6;
  letter-spacing: 0.01em;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover, a:focus {
  color: var(--color-primary);
}

/* 2. Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  margin: 0 0 18px 0;
  letter-spacing: 0.01em;
  color: var(--color-primary);
}
h1 {
  font-size: 2.2rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
h2 {
  font-size: 1.5rem;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
h3 {
  font-size: 1.15rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
h4, h5, h6 {
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
}
p, ul, ol {
  margin: 0 0 16px 0;
}
strong {
  font-weight: var(--font-weight-bold);
}

/* 3. Layout Containers */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.content-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section {
  margin-bottom: 60px;
  padding: 40px 20px;
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 4. Header & Navigation */
header {
  background: var(--color-white);
  box-shadow: 0 2px 12px var(--color-shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}
header .container {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 0;
}
header img {
  height: 44px;
  width: auto;
  margin-right: 32px;
}
header nav {
  display: flex;
  flex-direction: row;
  gap: 28px;
  align-items: center;
}
header nav a {
  font-family: var(--font-display);
  font-weight: var(--font-weight-medium);
  font-size: 1rem;
  color: var(--color-primary);
  padding: 8px 14px;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
  position: relative;
}
header nav a:hover, header nav a:focus {
  background: var(--color-accent);
  color: var(--color-secondary);
}
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-primary);
  cursor: pointer;
  margin-left: 24px;
  transition: color var(--transition);
}
.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-secondary);
}

/* 5. Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--color-white);
  z-index: var(--z-mobile-menu);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0;
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(.77,0,.175,1);
  box-shadow: 4px 0 32px var(--color-shadow);
  opacity: 0;
  pointer-events: none;
}
.mobile-menu.open {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu-close {
  align-self: flex-end;
  margin: 24px 24px 0 0;
  background: none;
  border: none;
  font-size: 2.2rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: color var(--transition);
}
.mobile-menu-close:focus {
  outline: 2px solid var(--color-secondary);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 24px;
  width: 100%;
  padding: 40px 32px;
}
.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-accent);
  transition: color var(--transition), background var(--transition);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav a:hover, .mobile-nav a:focus {
  color: var(--color-secondary);
  background: var(--color-accent);
}

/* 6. Main Content Layouts */
.feature-grid, .technology-grid, .technology-images, .review-cards, .news-articles, .tips-articles {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
}
.feature-grid > div, .technology-grid > div, .technology-images > div, .review-cards > div, .news-articles > article, .tips-articles > article {
  background: var(--color-accent);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 22px;
  flex: 1 1 260px;
  min-width: 260px;
  max-width: 360px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow var(--transition), transform var(--transition);
  border: 2.5px solid transparent;
}
.feature-grid > div:hover, .technology-grid > div:hover, .technology-images > div:hover, .review-cards > div:hover, .news-articles > article:hover, .tips-articles > article:hover {
  box-shadow: 0 8px 32px var(--color-shadow);
  border-color: var(--color-secondary);
  transform: translateY(-4px) scale(1.02);
}

.news-list, .tips-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.news-list li, .tips-list li {
  font-size: 1.05rem;
  padding-left: 0.5em;
  position: relative;
}
.news-list li:before, .tips-list li:before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, var(--color-secondary) 60%, var(--color-primary) 100%);
  border-radius: 3px;
  margin-right: 12px;
  vertical-align: middle;
}

/* 7. Cards & Testimonials */
.card-container {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.card {
  background: var(--color-accent);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  position: relative;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border: 2.5px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  box-shadow: 0 8px 32px var(--color-shadow);
  border-color: var(--color-secondary);
}

.testimonial-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  background: var(--color-accent);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  border-left: 6px solid var(--color-secondary);
  color: var(--color-primary);
  font-size: 1.05rem;
  font-style: italic;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.testimonial-card span {
  font-family: var(--font-display);
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
  font-style: normal;
  margin-left: 12px;
}
.testimonial-card:hover {
  box-shadow: 0 8px 32px var(--color-shadow);
  border-color: var(--color-primary);
}

/* 8. Buttons */
.cta-button, .cookie-btn, .cookie-settings-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 14px 36px;
  border-radius: var(--radius-btn);
  background: linear-gradient(135deg, var(--color-secondary) 60%, var(--color-primary) 100%);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--color-shadow);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  margin-top: 8px;
  margin-bottom: 8px;
}
.cta-button:hover, .cta-button:focus, .cookie-btn:hover, .cookie-btn:focus, .cookie-settings-btn:hover, .cookie-settings-btn:focus {
  background: linear-gradient(135deg, var(--color-primary) 60%, var(--color-secondary) 100%);
  box-shadow: 0 4px 16px var(--color-shadow);
  transform: translateY(-2px) scale(1.03);
}

/* Cookie banner specific buttons */
.cookie-btn.accept {
  background: linear-gradient(135deg, #2D8BBA 60%, #1B2536 100%);
  color: #fff;
}
.cookie-btn.reject {
  background: linear-gradient(135deg, #e5e8ef 60%, #b0b8c6 100%);
  color: #1B2536;
}
.cookie-btn.reject:hover {
  background: linear-gradient(135deg, #b0b8c6 60%, #e5e8ef 100%);
  color: #2D8BBA;
}
.cookie-settings-btn {
  background: transparent;
  color: var(--color-secondary);
  border: 2px solid var(--color-secondary);
  box-shadow: none;
  margin-left: 12px;
}
.cookie-settings-btn:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* 9. Filters, Pagination, Accordions */
.category-filters, .filter-by-category {
  display: flex;
  flex-direction: row;
  gap: 18px;
  margin: 18px 0 0 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
}
.category-filters span, .filter-by-category span {
  cursor: pointer;
  padding: 6px 16px;
  border-radius: 6px;
  background: var(--color-accent);
  color: var(--color-primary);
  transition: background var(--transition), color var(--transition);
}
.category-filters span:hover, .filter-by-category span:hover {
  background: var(--color-secondary);
  color: var(--color-white);
}
.pagination {
  display: flex;
  flex-direction: row;
  gap: 12px;
  margin: 18px 0 0 0;
  font-family: var(--font-display);
  font-size: 1rem;
}
.pagination span, .pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  transition: background var(--transition), color var(--transition);
}
.pagination a:hover, .pagination a:focus {
  background: var(--color-secondary);
  color: var(--color-white);
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.faq-accordion > div {
  background: var(--color-accent);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 20px 24px;
  margin-bottom: 12px;
  border-left: 5px solid var(--color-secondary);
}
.faq-accordion h4 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

/* 10. Footer */
footer {
  background: var(--color-primary);
  color: var(--color-accent);
  padding: 40px 0 0 0;
  margin-top: 60px;
}
footer .container {
  flex-direction: column;
  gap: 24px;
}
footer nav {
  display: flex;
  flex-direction: row;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
footer nav a {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  padding: 6px 10px;
  border-radius: 4px;
  transition: background var(--transition), color var(--transition);
}
footer nav a:hover, footer nav a:focus {
  background: var(--color-secondary);
  color: var(--color-white);
}
.footer-contact {
  font-size: 0.98rem;
  color: var(--color-accent);
  margin-bottom: 24px;
}

/* 11. Cookie Consent Banner */
.cookie-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: var(--z-cookie-banner);
  background: var(--color-white);
  box-shadow: 0 -2px 16px var(--color-shadow);
  padding: 28px 20px 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  border-top-left-radius: 18px;
  border-top-right-radius: 18px;
  animation: cookie-slide-in 0.5s cubic-bezier(.77,0,.175,1);
}
@keyframes cookie-slide-in {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.cookie-banner p {
  color: var(--color-primary);
  font-size: 1.05rem;
  margin: 0 0 8px 0;
  text-align: center;
}
.cookie-banner .cookie-actions {
  display: flex;
  flex-direction: row;
  gap: 16px;
  margin-top: 8px;
}

/* Cookie Modal */
.cookie-modal-overlay {
  position: fixed;
  left: 0; right: 0; top: 0; bottom: 0;
  background: rgba(27,37,54,0.55);
  z-index: calc(var(--z-cookie-banner) + 1);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.3s cubic-bezier(.77,0,.175,1);
}
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.cookie-modal {
  background: var(--color-white);
  border-radius: 18px;
  box-shadow: 0 8px 32px var(--color-shadow);
  padding: 36px 28px 28px 28px;
  max-width: 420px;
  width: 90vw;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  animation: modal-pop 0.35s cubic-bezier(.77,0,.175,1);
}
@keyframes modal-pop {
  from { transform: scale(0.92); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.cookie-modal h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.cookie-modal .cookie-category {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.cookie-modal .cookie-category label {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-primary);
}
.cookie-modal .cookie-toggle {
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: var(--color-grey);
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
  margin-right: 8px;
}
.cookie-modal .cookie-toggle input {
  display: none;
}
.cookie-modal .cookie-toggle span {
  position: absolute;
  left: 2px; top: 2px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-secondary);
  transition: left var(--transition), background var(--transition);
}
.cookie-modal .cookie-toggle input:checked + span {
  left: 22px;
  background: var(--color-primary);
}
.cookie-modal .cookie-category.essential .cookie-toggle {
  background: var(--color-secondary);
  cursor: not-allowed;
}
.cookie-modal .cookie-category.essential label {
  color: var(--color-secondary);
  font-weight: var(--font-weight-bold);
}
.cookie-modal .cookie-modal-actions {
  display: flex;
  flex-direction: row;
  gap: 16px;
  margin-top: 12px;
}
.cookie-modal .cookie-modal-close {
  position: absolute;
  top: 18px; right: 18px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: color var(--transition);
}
.cookie-modal .cookie-modal-close:hover {
  color: var(--color-secondary);
}

/* 12. Responsive Design */
@media (max-width: 1024px) {
  .container {
    max-width: 960px;
  }
  .feature-grid > div, .technology-grid > div, .technology-images > div, .review-cards > div {
    min-width: 220px;
    max-width: 100%;
  }
}
@media (max-width: 900px) {
  .container {
    max-width: 760px;
  }
  .feature-grid, .technology-grid, .technology-images, .review-cards, .news-articles, .tips-articles {
    gap: 16px;
  }
}
@media (max-width: 768px) {
  :root {
    --header-height: 62px;
  }
  header .container {
    height: var(--header-height);
    padding: 0 12px;
  }
  header nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .section {
    padding: 28px 8px;
    margin-bottom: 36px;
  }
  .feature-grid, .technology-grid, .technology-images, .review-cards, .news-articles, .tips-articles {
    flex-direction: column;
    gap: 18px;
  }
  .feature-grid > div, .technology-grid > div, .technology-images > div, .review-cards > div, .news-articles > article, .tips-articles > article {
    min-width: 0;
    max-width: 100%;
    padding: 20px 12px;
  }
  .testimonial-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 16px 10px;
  }
  .category-filters, .filter-by-category, .pagination {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
  .faq-accordion > div {
    padding: 14px 10px;
  }
  .cookie-banner {
    padding: 18px 6px 14px 6px;
    border-radius: 12px 12px 0 0;
  }
  .cookie-modal {
    padding: 22px 8px 18px 8px;
    border-radius: 12px;
  }
  footer .container {
    padding: 0 8px;
  }
  footer nav {
    flex-direction: column;
    gap: 10px;
  }
}
@media (max-width: 480px) {
  h1 {
    font-size: 1.3rem;
  }
  h2 {
    font-size: 1.1rem;
  }
  .cta-button, .cookie-btn, .cookie-settings-btn {
    font-size: 0.98rem;
    padding: 10px 18px;
  }
}

/* 13. Geometric/Structured Visual Accents */
.section {
  border: 2.5px solid var(--color-accent);
  box-shadow: 0 4px 24px var(--color-shadow), 0 0 0 4px var(--color-secondary) inset;
}
.feature-grid > div, .technology-grid > div, .technology-images > div, .review-cards > div, .card {
  border: 2.5px solid var(--color-grey);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.feature-grid > div:before, .technology-grid > div:before, .review-cards > div:before, .card:before {
  content: '';
  position: absolute;
  top: -32px; right: -32px;
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--color-secondary) 60%, var(--color-accent) 100%);
  opacity: 0.08;
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
  z-index: 0;
}

/* 14. Utility Classes */
.text-image-section {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .text-image-section {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }
}
.content-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
}
.feature-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 15px;
}

/* 15. Accessibility & Focus */
a:focus, button:focus, .cta-button:focus, .cookie-btn:focus, .cookie-settings-btn:focus {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* 16. Hide visually but keep accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* 17. Misc */
.team-photos {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 12px;
}
.map {
  background: var(--color-grey);
  border-radius: 12px;
  padding: 18px;
  margin-top: 12px;
  font-size: 0.98rem;
  color: var(--color-primary);
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

/* 18. Hide mobile menu by default on desktop */
@media (min-width: 769px) {
  .mobile-menu {
    display: none !important;
  }
  .mobile-menu-toggle {
    display: none !important;
  }
}