/* =========================
   GasKompass Elegant Classic CSS
   ========================= */

/* --- Font Imports (Serif for classic, Montserrat for display, Roboto for body) --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Roboto:wght@400;500&display=swap');

:root {
  --color-primary: #17456B;
  --color-secondary: #27A8A3;
  --color-accent: #F9F9F9;
  --color-bg: #F7F6F3;
  --color-muted: #E5E3DF;
  --color-text: #23201A;
  --color-text-light: #fff;
  --color-border: #D1CFCB;
  --color-shadow: rgba(23, 69, 107, 0.07);
  --font-display: 'Playfair Display', serif;
  --font-body: 'Roboto', serif;
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 2px 16px var(--color-shadow);
  --shadow-hover: 0 4px 24px rgba(23,69,107,0.13);
  --gap-section: 60px;
  --gap-card: 24px;
  --gap-content: 20px;
  --gap-feature: 15px;
}

html {
  box-sizing: border-box;
  font-size: 18px;
  background: var(--color-bg);
  color: var(--color-text);
  scroll-behavior: smooth;
}
*, *:before, *:after {
  box-sizing: inherit;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 0.5em;
  font-weight: 700;
  letter-spacing: 0.01em;
}
h1 {
  font-size: 2.2rem;
  line-height: 1.15;
}
h2 {
  font-size: 1.5rem;
  margin-bottom: 0.7em;
}
h3 {
  font-size: 1.15rem;
  color: var(--color-secondary);
  margin-bottom: 0.5em;
}
h4, h5, h6 {
  font-size: 1rem;
  color: var(--color-primary);
}
p, ul, ol, blockquote {
  font-size: 1rem;
  margin-bottom: 1.1em;
}
strong {
  font-weight: 700;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover, a:focus {
  color: var(--color-secondary);
  text-decoration: underline;
}

/* --- Layout Containers --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: var(--gap-content);
}
.content-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--gap-content);
}

.section {
  margin-bottom: var(--gap-section);
  padding: 40px 20px;
  background: var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* --- Header & Navigation --- */
header {
  background: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px var(--color-shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
header .container {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 18px 20px;
}
header img {
  height: 44px;
  width: auto;
  margin-right: 24px;
}
header nav {
  display: flex;
  flex-direction: row;
  gap: 24px;
  align-items: center;
}
header nav a {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-primary);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
header nav a:hover, header nav a:focus {
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-secondary);
}
.button.primary {
  background: var(--color-primary);
  color: var(--color-text-light);
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  border: none;
  box-shadow: 0 2px 8px var(--color-shadow);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-left: 18px;
  text-align: center;
  display: inline-block;
}
.button.primary:hover, .button.primary:focus {
  background: var(--color-secondary);
  color: var(--color-text-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px) scale(1.03);
}

/* --- Mobile Navigation --- */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-primary);
  cursor: pointer;
  margin-left: 12px;
  transition: color var(--transition);
}
.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-secondary);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(23, 69, 107, 0.97);
  z-index: 9999;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(.4,0,.2,1);
}
.mobile-menu.open {
  display: flex;
  opacity: 1;
  pointer-events: auto;
  animation: slideInMenu 0.35s cubic-bezier(.4,0,.2,1);
}
@keyframes slideInMenu {
  from { transform: translateX(-40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
.mobile-menu-close {
  background: none;
  border: none;
  color: var(--color-text-light);
  font-size: 2.2rem;
  align-self: flex-end;
  margin: 24px 24px 0 0;
  cursor: pointer;
  transition: color var(--transition);
}
.mobile-menu-close:focus {
  outline: 2px solid var(--color-secondary);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin: 40px 0 0 40px;
}
.mobile-nav a {
  color: var(--color-text-light);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: color var(--transition);
}
.mobile-nav a:hover, .mobile-nav a:focus {
  color: var(--color-secondary);
  text-decoration: underline;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(120deg, var(--color-accent) 70%, var(--color-muted) 100%);
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: 0 2px 16px var(--color-shadow);
  margin-bottom: var(--gap-section);
  padding: 40px 0 30px 0;
}
.hero .container {
  align-items: center;
  justify-content: center;
}
.hero .content-wrapper {
  align-items: flex-start;
  gap: 18px;
}
.hero h1 {
  font-size: 2.3rem;
  color: var(--color-primary);
  margin-bottom: 0.3em;
}
.hero p {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 1.2em;
}

/* --- Feature Grid & Cards --- */
.feature-grid, .feature-list, .tips-grid, .gallery {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-card);
  margin-bottom: 20px;
}
.feature-grid > div, .feature-list > div, .tips-grid > div, .gallery > div {
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  padding: 24px 20px;
  flex: 1 1 220px;
  min-width: 220px;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-feature);
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-grid > div:hover, .feature-list > div:hover, .tips-grid > div:hover, .gallery > div:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px) scale(1.02);
}

/* --- Cards & Card Container --- */
.card-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-card);
}
.card {
  background: var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  position: relative;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: var(--gap-feature);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px) scale(1.01);
}

/* --- Content Grid --- */
.content-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-content);
  justify-content: space-between;
}

/* --- Text-Image Section --- */
.text-image-section {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.text-image-section > div {
  flex: 1 1 320px;
  min-width: 220px;
}
.text-image-section img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* --- Testimonial Cards & Slider --- */
.testimonial-slider {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-card);
  margin-bottom: 20px;
}
.testimonial-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  min-width: 260px;
  max-width: 420px;
  flex: 1 1 260px;
  color: var(--color-primary);
  transition: box-shadow var(--transition), transform var(--transition);
}
.testimonial-card blockquote {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 0 0 0.5em 0;
  quotes: "\201E" "\201C";
}
.testimonial-card blockquote:before {
  content: open-quote;
  color: var(--color-secondary);
  font-size: 2.2rem;
  vertical-align: -0.4em;
  margin-right: 0.1em;
}
.testimonial-card span {
  font-size: 0.98rem;
  color: var(--color-secondary);
  font-style: italic;
}
.testimonial-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px) scale(1.01);
}

/* --- Feature Item --- */
.feature-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 15px;
}

/* --- Mission Statement & Trust Badges --- */
.mission-statement {
  background: var(--color-muted);
  border-left: 4px solid var(--color-secondary);
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.trust-badges, .trust-signals {
  font-size: 0.98rem;
  color: var(--color-secondary);
  letter-spacing: 0.01em;
  margin-bottom: 0.5em;
}
.trust-badges span, .trust-signals span {
  font-weight: 600;
}

/* --- Table Styles --- */
table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  overflow: hidden;
}
table caption {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 0.5em;
}
table th, table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}
table th {
  background: var(--color-muted);
  color: var(--color-primary);
  font-weight: 700;
}
table tr:last-child td {
  border-bottom: none;
}

/* --- Lists --- */
ul, ol {
  padding-left: 1.2em;
  margin-bottom: 1.2em;
}
ul li, ol li {
  margin-bottom: 0.5em;
}

/* --- FAQ & Download Guides --- */
.faq-teaser, .downloadable-guides {
  background: var(--color-muted);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin-bottom: 12px;
}
.downloadable-guides ul {
  margin: 0;
}

/* --- Contact Info --- */
.contact-info {
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  padding: 22px 20px;
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-info a {
  color: var(--color-secondary);
  text-decoration: underline;
}

/* --- Footer --- */
footer {
  background: var(--color-accent);
  border-top: 1px solid var(--color-border);
  padding: 36px 0 18px 0;
  margin-top: 60px;
}
footer .container {
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}
footer nav {
  display: flex;
  flex-direction: row;
  gap: 22px;
  margin-bottom: 10px;
}
footer nav a {
  color: var(--color-primary);
  font-size: 0.98rem;
  font-family: var(--font-body);
  transition: color var(--transition);
}
footer nav a:hover, footer nav a:focus {
  color: var(--color-secondary);
}
.footer-contact {
  font-size: 0.95rem;
  color: var(--color-primary);
  line-height: 1.5;
}

/* --- Cookie Consent Banner --- */
.cookie-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 -2px 16px var(--color-shadow);
  border-top: 1px solid var(--color-border);
  z-index: 99999;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 32px;
  font-size: 1rem;
  animation: slideInBanner 0.4s cubic-bezier(.4,0,.2,1);
}
@keyframes slideInBanner {
  from { transform: translateY(60px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.cookie-banner .cookie-buttons {
  display: flex;
  flex-direction: row;
  gap: 16px;
}
.cookie-banner button {
  font-family: var(--font-body);
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: none;
  padding: 8px 22px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  font-weight: 500;
}
.cookie-banner .accept {
  background: var(--color-primary);
  color: #fff;
}
.cookie-banner .accept:hover, .cookie-banner .accept:focus {
  background: var(--color-secondary);
}
.cookie-banner .reject {
  background: #fff;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.cookie-banner .reject:hover, .cookie-banner .reject:focus {
  background: var(--color-muted);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}
.cookie-banner .settings {
  background: var(--color-muted);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}
.cookie-banner .settings:hover, .cookie-banner .settings:focus {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}

/* --- Cookie Modal --- */
.cookie-modal-overlay {
  position: fixed;
  left: 0; right: 0; top: 0; bottom: 0;
  background: rgba(23,69,107,0.45);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(.4,0,.2,1);
}
.cookie-modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.cookie-modal {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--color-shadow);
  padding: 36px 32px 28px 32px;
  min-width: 320px;
  max-width: 95vw;
  display: flex;
  flex-direction: column;
  gap: 18px;
  animation: fadeInModal 0.3s cubic-bezier(.4,0,.2,1);
}
@keyframes fadeInModal {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.cookie-modal h2 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 0.5em;
}
.cookie-modal .cookie-category {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}
.cookie-modal .cookie-category label {
  font-size: 1rem;
  color: var(--color-primary);
  font-family: var(--font-body);
}
.cookie-modal .cookie-toggle {
  width: 38px;
  height: 22px;
  background: var(--color-muted);
  border-radius: 11px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
  margin-right: 8px;
}
.cookie-modal .cookie-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}
.cookie-modal .cookie-toggle span {
  position: absolute;
  left: 3px; top: 3px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: left var(--transition), background var(--transition);
  box-shadow: 0 1px 4px var(--color-shadow);
}
.cookie-modal .cookie-toggle input:checked + span {
  left: 19px;
  background: var(--color-secondary);
}
.cookie-modal .cookie-category.essential label {
  color: var(--color-secondary);
  font-weight: 700;
}
.cookie-modal .cookie-category.essential .cookie-toggle {
  background: var(--color-secondary);
  cursor: not-allowed;
}
.cookie-modal .cookie-category.essential .cookie-toggle span {
  background: #fff;
}
.cookie-modal .cookie-category.essential .cookie-toggle input {
  pointer-events: none;
}
.cookie-modal .modal-actions {
  display: flex;
  flex-direction: row;
  gap: 16px;
  margin-top: 18px;
}
.cookie-modal .modal-actions button {
  font-family: var(--font-body);
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: none;
  padding: 8px 22px;
  cursor: pointer;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.cookie-modal .modal-actions .accept {
  background: var(--color-primary);
  color: #fff;
}
.cookie-modal .modal-actions .accept:hover, .cookie-modal .modal-actions .accept:focus {
  background: var(--color-secondary);
}
.cookie-modal .modal-actions .reject {
  background: #fff;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.cookie-modal .modal-actions .reject:hover, .cookie-modal .modal-actions .reject:focus {
  background: var(--color-muted);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}
.cookie-modal .modal-actions .close {
  background: var(--color-muted);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}
.cookie-modal .modal-actions .close:hover, .cookie-modal .modal-actions .close:focus {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}

/* --- Responsive Design --- */
@media (max-width: 1100px) {
  .container {
    max-width: 98vw;
  }
}
@media (max-width: 900px) {
  .feature-grid > div, .feature-list > div, .tips-grid > div, .gallery > div {
    flex: 1 1 180px;
    min-width: 180px;
  }
  .testimonial-card {
    min-width: 180px;
    max-width: 100%;
  }
}
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  header .container {
    flex-direction: row;
    gap: 10px;
    padding: 12px 10px;
  }
  header nav {
    display: none;
  }
  .button.primary {
    margin-left: 0;
    padding: 10px 18px;
    font-size: 0.98rem;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero {
    padding: 24px 0 18px 0;
  }
  .section {
    padding: 24px 10px;
    margin-bottom: 36px;
  }
  .feature-grid, .feature-list, .tips-grid, .gallery, .testimonial-slider {
    flex-direction: column;
    gap: 18px;
  }
  .feature-grid > div, .feature-list > div, .tips-grid > div, .gallery > div {
    min-width: 0;
    width: 100%;
    padding: 18px 12px;
  }
  .testimonial-card {
    min-width: 0;
    width: 100%;
    padding: 16px 10px;
  }
  .content-grid {
    flex-direction: column;
    gap: 14px;
  }
  .text-image-section {
    flex-direction: column;
    gap: 18px;
  }
  .cookie-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 18px 10px;
    font-size: 0.98rem;
  }
  .cookie-banner .cookie-buttons {
    flex-direction: column;
    gap: 10px;
  }
  .cookie-modal {
    padding: 18px 8px 14px 8px;
    min-width: 0;
    width: 98vw;
  }
  footer .container {
    padding: 0 10px;
  }
  footer nav {
    flex-direction: column;
    gap: 8px;
  }
}
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }
  .hero h1 {
    font-size: 1.3rem;
  }
  .section {
    padding: 14px 2px;
  }
}

/* --- Utility Classes --- */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* --- 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;
}

/* --- Animations for micro-interactions --- */
.button, .card, .testimonial-card, .feature-grid > div, .feature-list > div, .tips-grid > div, .gallery > div {
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition), color var(--transition);
}

/* --- Prevent Overlapping --- */
.card, .testimonial-card, .feature-grid > div, .feature-list > div, .tips-grid > div, .gallery > div {
  margin-bottom: 20px;
}
.section, .card, .testimonial-card {
  margin-bottom: 60px;
}

/* --- Remove absolute positioning for content cards --- */
/* Only decorative elements may use absolute positioning, not content cards */

/* --- End of GasKompass Elegant Classic CSS --- */