/* ===================================
   OPALSTORM ENERGIE
   Monochrome Sophisticated CSS Theme
   =================================== */

/* CSS RESET & NORMALIZE */
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video {
  margin:0;
  padding:0;
  border:0;
  font-size:100%;
  font:inherit;
  vertical-align:baseline;
  box-sizing:border-box;
}
html {box-sizing:border-box; scroll-behavior:smooth; background:#fff;}
*, *:before, *:after {box-sizing:inherit;}
body {
  font-family: 'Source Sans Pro', Arial, sans-serif;
  background: #fff;
  color: #111111;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {max-width:100%; display:block; border:0;}
ul, ol {list-style-position:outside; margin-left:2em;}
a {color: #191919; text-decoration:none; transition: color .2s;}
a:hover, a:focus {color: #005E6A; text-decoration:underline;}

/* == Brand Font Import == */
@import url('https://fonts.googleapis.com/css?family=Montserrat:700,600,500&display=swap');
@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,600&display=swap');

h1, h2, h3, h4 {
  color: #111;
  font-family: 'Montserrat', Arial, sans-serif;
  font-weight: 700;
}
h1 {font-size: 2.5rem; line-height: 1.15; margin-bottom: 16px;}
h2 {font-size: 2rem; margin-bottom: 16px;}
h3 {font-size: 1.3rem; margin-bottom: 10px; font-weight: 600;}
h4 {font-size: 1.125rem; margin-bottom: 8px;}
p, ul, ol {margin-bottom: 16px;}
strong {font-weight:700;}

.section {
  margin-bottom: 60px;
  padding: 40px 20px;
}
.container {
  width: 100%;
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Layout helpers */
.card-container, .content-grid, .feature-grid, .service-cards, .testimonial-slider, .statistic-cards, .service-list-grid, .testimonial-list, .faq-accordion {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 0; /* Cards handle bottom margin */
}
.card, .feature-card, .service-card, .stat-card, .testimonial-card, .faq-item {
  margin-bottom: 20px;
  position: relative;
}
.text-image-section {
  display: flex;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}
.testimonial-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 16px 0 rgba(0,0,0,0.08), 0 1.5px 8px 0 rgba(34,34,34,0.03);
  border:1px solid #eaeaea;
  min-width: 260px;
  max-width: 370px;
  transition: box-shadow .25s, border .2s;
}
.testimonial-card:hover, .testimonial-card:focus-within {
  box-shadow: 0 4px 28px 2px rgba(14,21,33,.11), 0 2px 8px 0 rgba(0,0,0,0.04);
  border-color: #111;
  z-index:2;
}
.feature-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 15px;
}

/* HERO SECTION / HEADER-AREA */
.hero, .hero-secondary {
  background: #f8f8f8;
  padding: 64px 0 52px 0;
  margin-bottom: 60px;
}
.hero .container, .hero-secondary .container {
  align-items: center;
}
.hero .content-wrapper, .hero-secondary .content-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 32px;
  text-align: left;
}
.hero h1, .hero-secondary h1 {
  font-size: 2.5rem;
  font-family: 'Montserrat', Arial, sans-serif;
  color:#111;
  margin-bottom:12px;
}
.hero p, .hero-secondary p {
  font-size: 1.17rem;
  color: #232323;
}

/* ====== HEADER ====== */
header {
  background:#fff;
  position:sticky;
  top:0; left:0; right:0;
  z-index: 20;
  box-shadow: 0 1px 8px 0 rgba(26,26,26,0.03);
}
header .container {
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  min-height: 74px;
}
.logo img {
  max-height: 45px;
  width:auto;
}
nav.main-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 1rem;
  letter-spacing: 0.01em;
}
nav.main-nav a {
  color: #222;
  opacity:0.87;
  padding: 4px 2px;
  position:relative;
  border-radius: 2px;
  transition: color 0.18s, background .15s;
}
nav.main-nav a:hover, nav.main-nav a:focus {
  color: #111;
  background: #f2f2f2;
}
.cta-btn {
  display: inline-block;
  font-family: 'Montserrat', Arial, sans-serif;
  background: #fff;
  color: #111;
  border: 2px solid #191919;
  border-radius: 32px;
  padding: 10px 32px;
  font-size: 1.13rem;
  font-weight: 700;
  margin-left: 24px;
  box-shadow: 0 1.5px 9px 0 rgba(34,34,34,.07);
  transition: background .22s, border-color .18s, color .16s, box-shadow .25s;
  outline: none;
  cursor: pointer;
  letter-spacing: 0.03em;
}
.cta-btn:hover, .cta-btn:focus {
  background: #1d1d1d;
  color: #fff;
  border-color: #000;
  box-shadow: 0 3px 16px 2px rgba(20,20,20,.14);
  text-decoration:none;
}

/* ===== BURGER MENU ===== */
.mobile-menu-toggle {
  display: none;
  background: #fff;
  border: none;
  font-size: 2.1rem;
  color: #222;
  margin-left: 22px;
  padding: 5px 11px 5px 11px;
  border-radius: 8px;
  cursor: pointer;
  transition: background .21s, box-shadow .2s;
  z-index: 41;
}
.mobile-menu-toggle:hover, .mobile-menu-toggle:focus {
  background: #ededed;
  box-shadow: 0 2px 9px 0 rgba(38,38,38,.08);
}
.mobile-menu {
  position: fixed;
  top: 0; left: 0;
  right: 0; bottom: 0;
  width: 100vw; height: 100vh;
  z-index: 50;
  background: rgba(15,17,19,0.96);
  transform: translateX(-100vw);
  transition: transform 0.32s cubic-bezier(.68,-0.5,.32,1.5);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0;
}
.mobile-menu.active {
  transform: translateX(0);
}
.mobile-menu-close {
  margin: 30px 0 0 28px;
  font-size: 2rem;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  align-self: flex-start;
  z-index: 55;
  transition: color .18s, background .2s;
  border-radius: 6px;
  padding: .3em .85em;
}
.mobile-menu-close:hover, .mobile-menu-close:focus {
  color: #79C1BA;
  background: #232323;
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-top: 48px;
  width: 100%;
  gap: 0px;
}
.mobile-nav a {
  color: #fff;
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 1.23rem;
  padding: 20px 38px 20px 38px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  width: 100%;
  letter-spacing: 0.01em;
  transition: background 0.17s, color 0.19s;
}
.mobile-nav a:hover, .mobile-nav a:focus {
  background: #191b1c;
  color: #79C1BA;
}

/* ===== General Sections ===== */
.features, .about, .about-short, .services, .faq, .course-overview, .info, .statistics, .team, .approach, .footer-cta, .faq-teaser, .contact, .thank-you, .testimonial-preview, .legal, .facts-list, .benefits, .energy-tips {
  margin-bottom: 60px;
  padding: 40px 0;
}
.content-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ===== Feature Cards ===== */
.feature-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: flex-start;
}
.feature-card {
  background: #fff;
  border: 1.3px solid #e7e7e7;
  border-radius: 16px;
  box-shadow: 0 2.5px 16px 0 rgba(27,27,27,0.07);
  padding: 30px 28px 24px 28px;
  width: 100%; max-width: 320px;
  min-width: 245px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  transition: box-shadow .23s, border .22s;
}
.feature-card img {
  width: 44px; height:44px;
  margin-bottom: 12px;
}
.feature-card:hover, .feature-card:focus-within {
  box-shadow: 0 7px 38px 5px rgba(10,10,10,0.10);
  border-color: #111;
  z-index:2;
}
.feature-card h3 {
  font-size: 1.13rem;
  letter-spacing: 0.005em;
  color:#191919;
  margin-bottom: 4px;
}
.feature-card p {
  font-size: 1rem;
  color: #232323;
}

/* ===== Service Cards ===== */
.service-cards, .service-list-grid {
  gap: 28px;
  justify-content: flex-start;
}
.service-card {
  background: #fafafa;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  padding: 26px 25px 20px 25px;
  min-width:250px;
  max-width: 350px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 13px;
  box-shadow: 0 2px 12px 0 rgba(18,18,18,.05);
  transition: box-shadow .18s, border .18s;
  font-size: 1.025rem;
}
.service-card:hover, .service-card:focus-within {
  border-color: #aaa;
  box-shadow: 0 4px 18px 3px rgba(25,25,25,.13);
  z-index:2;
}
.service-card h2, .service-card h3 {
  font-size:1.13rem;
  font-family:'Montserrat', Arial, sans-serif;
  color:#111;
  margin-bottom:5px;
}
.service-card .price {
  font-size: 1.15rem;
  font-weight: 600;
  color: #111;
  font-family:'Montserrat', Arial, sans-serif;
  opacity:.97;
  margin-top:8px;
}

/* About short USPs */
.usp-list {
  margin-top: 8px;
  margin-bottom: 0;
  padding-left: 20px;
  color: #232323;
  list-style: disc;
  font-size: 1.07rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* FAQ accordion */
.faq-accordion {
  flex-direction: column;
  gap:24px;
}
.faq-item {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  padding: 18px 22px;
  box-shadow: 0 2px 8px rgba(50,50,50,0.03);
  transition: box-shadow .19s, border .15s;
}
.faq-item h3 { font-size: 1.09rem; color: #191919; margin-bottom: 7px; }
.faq-item p { font-size: 1rem; }
.faq-item:hover {
  box-shadow: 0 3px 16px rgba(12,12,12,0.10);
  border-color: #191919;
}

/* Team overview */
.team-overview {
  display: flex;
  flex-direction: column;
  gap:16px;
}
.team-overview ul { gap:8px; }

/* Statistics / "statistic-cards" */
.statistic-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: flex-start;
}
.stat-card {
  background: #f7f7f7;
  border: 1px solid #e1e1e1;
  border-radius: 12px;
  padding: 32px 24px;
  min-width: 155px;
  max-width: 220px;
  flex: 1 1 145px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-shadow: 0 2px 8px 0 rgba(14,14,14,0.04);
  font-family:'Montserrat',Arial,sans-serif;
  transition: box-shadow .21s, border .16s;
  margin-bottom: 20px;
}
.stat-card h3 {
  font-size: 2rem;
  color: #111;
  margin-bottom:7px;
}
.stat-card p {
  color: #343434;
  font-size:1rem;
}
.stat-card:hover {
  box-shadow: 0 7px 36px 5px rgba(30,30,30,.08);
  border-color: #191919;
}

/* testimonial stars */
.star-rating {
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: #005E6A;
  font-family:'Montserrat',arial,sans-serif;
  font-weight:600;
  margin-bottom: 9px;
}

/* Footer styles */
footer {
  background: #18191B;
  padding: 52px 0 36px 0;
  color: #F6F4F0;
  font-size: 1rem;
}
footer .container {
  flex-direction: row;
  gap: 40px;
  align-items: flex-start;
  justify-content: space-between;
}
.footer-logo img { max-height: 34px; display: block; }
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.footer-nav a {
  color: #ededed;
  transition: color .19s;
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 0.98rem;
  opacity:.82;
}
.footer-nav a:hover, .footer-nav a:focus {
  color: #fff;
  opacity:1;
}
.footer-contact p, .footer-contact a {
  color: #bbb;
  font-size: .99rem;
}
.footer-contact a:hover, .footer-contact a:focus { color: #fff; }

/* text-section apply spacing */
.text-section { margin-bottom: 32px; }
.contact-details {margin-bottom: 24px;}

/* Cookie Consent Banner */
.cookie-consent-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  width: 100vw;
  background: #232323;
  color: #fff;
  font-family: 'Source Sans Pro', Arial, sans-serif;
  font-size: 1.03rem;
  box-shadow: 0 -3px 16px 4px rgba(10,10,10,0.09);
  z-index: 99999;
  padding: 22px 0 22px 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(120%);
  transition: opacity .22s, transform .27s;
}
.cookie-consent-banner.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.cookie-consent-text { max-width: 480px; }
.cookie-btns {
  display: flex;
  flex-direction: row;
  gap: 14px;
}
.cookie-btn {
  background: #fff;
  color: #111;
  border: none;
  outline: none;
  border-radius: 24px;
  font-size: 1rem;
  font-family: 'Montserrat', Arial, sans-serif;
  font-weight: 600;
  padding: 7px 20px;
  margin: 0 1px;
  cursor: pointer;
  transition: background .18s, color .18s, box-shadow .22s;
  box-shadow: 0 1.5px 7px 0 rgba(34,34,34,0.09);
}
.cookie-btn.accept {
  background: #005E6A;
  color: #fff;
}
.cookie-btn.accept:hover, .cookie-btn.accept:focus {
  background: #191919;
}
.cookie-btn.reject {
  background: #f2f2f2;
  color: #191919;
}
.cookie-btn.reject:hover, .cookie-btn.reject:focus {
  background: #222;
  color: #fff;
}
.cookie-btn.settings {
  background: #fff;
  color: #005E6A;
  border: 1px solid #005E6A;
  font-weight: 500;
}
.cookie-btn.settings:hover, .cookie-btn.settings:focus {
  background: #005E6A;
  color: #fff;
}

/* Cookie Preferences Modal */
.cookie-modal {
  position: fixed;
  left:50%; top: 50%;
  transform: translate(-50%, -40vh);
  background: #fff;
  color: #111;
  min-width: 320px;
  max-width: 95vw;
  width: 370px;
  border-radius: 18px;
  box-shadow: 0 6px 46px 0 rgba(17,17,17,0.16);
  z-index: 100001;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s, transform .28s;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.cookie-modal.active {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}
.cookie-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 24px 14px 24px;
  border-bottom: 1px solid #e5e5e5;
}
.cookie-modal-header h3 {
  font-size: 1.22rem;
  color: #191919;
  margin-bottom: 0;
  font-family:'Montserrat', Arial, sans-serif;
}
.cookie-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #151515;
  cursor: pointer;
  padding:2px 11px;
  border-radius:5px;
  transition: background .17s, color .18s;
}
.cookie-modal-close:hover,.cookie-modal-close:focus {
  background: #efefef;
  color: #005E6A;
}
.cookie-modal-body {
  padding: 24px 24px 28px 24px;
  display: flex;
  flex-direction: column;
  gap:16px;
}
.cookie-category {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.cookie-toggle {
  appearance: none;
  width: 38px;
  height: 20px;
  background: #ccc;
  border-radius: 13px;
  position: relative;
  outline: none;
  cursor: pointer;
  margin-left: 13px;
  transition: background .2s;
}
.cookie-toggle:checked {
  background: #005E6A;
}
.cookie-toggle:before {
  content: '';
  position: absolute;
  left: 4px; top: 4px;
  width: 12px; height: 12px;
  background: #fff;
  border-radius: 50%;
  transition: transform .15s;
}
.cookie-toggle:checked:before {
  transform: translateX(16px);
}
.cookie-category-title {
  font-family:'Montserrat',Arial,sans-serif; font-size:1.06rem;
}
.cookie-category-essential {
  opacity:.6;
}
.cookie-modal-actions {
  padding: 0 24px 20px 24px;
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}
.cookie-modal-actions .cookie-btn { min-width:110px; }

/* --- Testimonial preview/slider styles --- */
.testimonial-slider, .testimonial-list {
  display:flex;
  flex-wrap:wrap;
  gap: 24px;
  justify-content: flex-start;
}
.testimonial-card p {
  color: #191919;
  font-size: 1.09rem;
  font-style: italic;
}
.testimonial-card span {
  font-family:'Montserrat',Arial,sans-serif;
  font-size: .97rem;
  color: #616161;
  font-weight: 500;
}

/* --- Statistics --- */
.statistics h2 { margin-bottom: 30px; }

/* --- Thank you --- */
.thank-you .content-wrapper {
  align-items: flex-start;
  gap: 25px;
}
.next-steps ul { gap:8px; }

/* --- Legal (Data privacy, Cookie, Terms...) --- */
.legal h1, .legal h2 { color: #191919; }
.legal ul { margin-top: 10px; margin-bottom:18px; }
.legal ul li { margin-bottom:8px; }

/* ===== Button & Interaction General ===== */
button, .cta-btn, .cookie-btn {
  outline: none;
}
button:active, .cta-btn:active, .cookie-btn:active {
  transform: translateY(1px) scale(0.99);
}

/* Micro-interactions for cards & links */
.card:hover, .feature-card:hover, .service-card:hover, .stat-card:hover, .faq-item:hover {
  box-shadow: 0 8px 32px 3px rgba(14,14,22,0.12);
  z-index:3;
}

/* List styles for facts, benefits, energy tips */
.facts-list, .benefits ul, .energy-tips ul {
  margin-top: 0;
  margin-bottom: 14px;
  padding-left: 20px;
  font-size: 1.07rem;
  color: #232323;
}
.benefits, .energy-tips {
  background: #f8f8f8;
  border-radius: 10px;
  padding:18px 16px 13px 16px;
  margin-bottom: 10px;
}

/* ============= MEDIA QUERIES ============= */
@media (max-width: 1120px) {
  .container {
    padding: 0 10px;
    max-width: 98vw;
  }
}
@media (max-width: 900px) {
  .container {
    padding: 0 1vw;
    max-width: 99vw;
  }
  footer .container { flex-direction: column; gap:30px; }
}
@media (max-width: 860px) {
  .feature-grid, .service-cards, .statistic-cards, .service-list-grid, .testimonial-slider, .testimonial-list {
    gap: 20px;
  }
  nav.main-nav { gap: 20px; }
}
@media (max-width: 820px) {
  header .container { flex-direction:row; gap:8px; }
  nav.main-nav { gap: 12px; font-size: .98rem; }
  .cta-btn { font-size: 1.04rem; padding:7px 18px; margin-left:13px; }
  .feature-card, .service-card, .stat-card {
    min-width: 180px;
    max-width: 99%;
  }
}
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.41rem; }
  .hero, .hero-secondary { padding: 38px 0 28px 0; }
  .feature-card, .service-card, .stat-card { padding: 20px 13px 13px 13px; }
  .feature-grid, .service-cards, .statistic-cards, .testimonial-slider, .testimonial-list, .service-list-grid {
    flex-direction: column;
    gap: 18px;
  }
  .testimonial-card { min-width:unset; max-width:100%; }
  .about, .about-short, .services, .features, .contact, .faq, .statistics, .faq-teaser, .thank-you, .info, .legal, .team, .approach, .footer-cta {
    padding: 26px 0;
    margin-bottom: 27px;
  }
  .main-nav, nav.main-nav {
    display: none;
  }
  .cta-btn {
    margin-left:0;
  }
  .mobile-menu-toggle {
    display: inline-block;
  }
  .footer-nav {
    flex-direction: row;
    flex-wrap:wrap;
    gap:18px;
  }
  .container { flex-direction: column; gap: 19px; padding: 0 7px; max-width: 100vw; }
  .text-image-section {
    flex-direction: column;
    gap: 18px;
  }
}
@media (max-width: 560px) {
  h1 { font-size:1.45rem; }
  h2 { font-size:1.13rem; }
  .hero .content-wrapper, .hero-secondary .content-wrapper {
    gap: 18px;
    padding-left:0;
  }
  .cookie-consent-banner {
    flex-direction: column;
    gap: 14px;
    padding: 16px 0 16px 0;
    font-size: .98rem;
    text-align:center;
  }
  .cookie-consent-text { max-width: 99vw; }
}

/* === Accessibility: focus ring === */
a:focus, button:focus, .cta-btn:focus, .cookie-btn:focus, .mobile-menu-close:focus, .cookie-modal-close:focus {
  outline: 2px solid #005E6A;
  outline-offset: 1.5px;
  z-index: 3;
}

/* === Misc === */
::-webkit-scrollbar {width:.68em; background:#f2f2f2;}
::-webkit-scrollbar-thumb {background:#d5d5d5; border-radius:6px;}
::-webkit-input-placeholder {color:#757575;}
::-moz-placeholder {color:#757575;}
:-ms-input-placeholder {color:#757575;}
::placeholder {color:#757575;}

/* ===================
   END OF STYLESHEET
   =================== */