* {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  overflow-x: hidden;
}



.header-up{
  background-color: #000000;
  padding: 10px ;
}

.header-up-text{
    display: flex;
    max-width: fit-content;
    margin: auto;
    align-items: center;
    color: #ffffff;
    text-decoration: none;
}

.header-up-text a{
      color: #ffffff;
text-decoration: underline;
margin-left: 120px;
}

.header-up-text p{
  margin-left: 4px;
}

.header-down{

  background-color: #ffffff;
  padding: 6px 22px; 

}
.header-down-obsah{
  max-width: 1600px;
  margin: auto;
    display: flex;
      align-items: center;
      justify-content: space-between;


}
.header-logo{
  height: 72px;
  width: auto;
  margin-left: 10px;
}

.header-menu ul{
  display: flex;
  gap: 30px;
  margin-right: 10px;
        align-items: center;
}

.header-menu ul li a{
  color: #000000;
  text-decoration: none;
  font-size: 20px;
}





/* =========================
   HERO SECTION – AERYX
========================= */

.hero {
  position: relative;
  height:84%;
  min-height: 74vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #fff;

  margin: 0 14px;
  border-radius: 24px;
}

/* background image (HTML img) */
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  z-index: 0;
}

/* gradient overlay from left */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(0,0,0,0.65) 0%,
    rgba(0,0,0,0.5) 30%,
    rgba(0,0,0,0.25) 55%,
    rgba(0,0,0,0.0) 75%
  );
  z-index: 1;

}


/* content */
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  padding-left: 80px;
  color: #ffffff;
}

/* main headline */
.hero-title {
  font-size: 64px;
  font-weight: 700;
 line-height: 1.1; 
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  overflow: visible;
}

/* description */
.hero-text {
  font-size: 17px;
  line-height: 1.65;
  color: #eeeeee;
  max-width: 520px;
  margin-bottom: 40px;
}

/* buttons container */
.hero-buttons {
  display: flex;
  gap: 16px;
  align-items: center;
}

/* =========================
   BUTTONS
========================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}

/* primary */
.btn.primary {
  background: #ffffff;
  color: #000000;
}

.btn.primary:hover {
  background: #000;
}

/* secondary */
.btn.secondary {
  border: 1px solid #ffffff;
  color: #ffffff;
  background: transparent;
}

.btn.secondary:hover {
  background: #111;
  color: #fff;
}



/* =========================
   RESPONSIVE
========================= */

@media (max-width: 1024px) {
  .hero-content {
    padding-left: 48px;
  }

  .hero-title {
    font-size: 52px;
  }
}

@media (max-width: 768px) {
  .hero {
    height: auto;
    padding: 120px 0;
  }

  .hero-img {
    object-position: center;
  }

  .hero-content {
    padding: 0 32px;
  }

  .hero-title {
    font-size: 42px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 34px;
  }

  .hero-text {
    font-size: 16px;
  }
}






.concept {
  padding: 120px 40px;
  background: #fff;
}

.concept-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.concept h2 {
  font-size: 42px;
  margin-bottom: 32px;
}

.concept-intro {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.7;
  color: #444;
  margin-bottom: 24px;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 64px;
}

.concept-item h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.concept-item p {
  color: #555;
  line-height: 1.6;
  margin-bottom: 12px;
}

@media (max-width: 900px) {
  .concept-grid {
    grid-template-columns: 1fr;
  }
}
















.technology {
  padding: 120px 40px;
  background: #f7f7f7;
}

.technology-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.technology h2 {
  font-size: 42px;
  margin-bottom: 80px;
}

.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px 60px;
  align-items: center;
}

.tech-model img {
  width: 100%;
  border-radius: 16px;
}

.tech-text h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.tech-text p {
  color: #444;
  line-height: 1.6;
}

/* MOBILE */
@media (max-width: 768px) {
  .tech-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}



.tech-model iframe {
  width: 100%;
  height: 320px;
  border: none;
  border-radius: 16px;
  background: #fff;
}












































.section {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

.section h2 {
  margin-bottom: 15px;
  border-bottom: 2px solid #38bdf8;
  display: inline-block;
}

ul {
  padding-left: 20px;
}

.status {
  text-align: center;
  padding: 20px;
  border-radius: 8px;
}

.status.offline {
  background: #7f1d1d;
}

.status.online {
  background: #14532d;
}

.hidden {
  display: none !important;
}

.stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 30px;
}

.stats div {
  background: #020617;
  border: 1px solid #38bdf8;
  padding: 20px;
  border-radius: 10px;
  min-width: 120px;
  text-align: center;
}

.stats span {
  font-size: 2.5rem;
  font-weight: bold;
}

.stats small {
  font-size: 1rem;
}

.stats label {
  display: block;
  margin-top: 5px;
  color: #94a3b8;
}

canvas {
  max-width: 100%;
  margin-top: 20px;
}


button.active {
  background: #38bdf8;
  color: black;
  font-weight: bold;
  box-shadow: 0 0 10px #38bdf8;
}













/* =========================
   VIZE – AERYX
========================= */

.vision {
  padding: 140px 40px;
  background: #f7f7f7;
}

.vision-inner {
  max-width: 900px;
  margin: 0 auto;
}

/* nadpis */
.vision h2 {
  font-size: 44px;
  font-weight: 700;
  margin-bottom: 36px;
  letter-spacing: -0.02em;
  color: #111;
}

/* úvodní silná věta */
.vision-lead {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.6;
  color: #111;
  margin-bottom: 36px;
}

/* běžné odstavce */
.vision p {
  font-size: 17px;
  line-height: 1.8;
  color: #444;
  margin-bottom: 22px;
}

/* zvýraznění klíčových pojmů */
.vision strong {
  color: #111;
  font-weight: 600;
}

/* jemná vertikální linka – data vibe */
.vision-inner {
  position: relative;
  padding-left: 32px;
}

.vision-inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.15),
    rgba(0,0,0,0.02)
  );
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 768px) {
  .vision {
    padding: 100px 24px;
  }

  .vision-inner {
    padding-left: 0;
  }

  .vision-inner::before {
    display: none;
  }

  .vision h2 {
    font-size: 36px;
  }

  .vision-lead {
    font-size: 20px;
  }
}





/* =========================
   TEAM – AERYX
========================= */

.team {
  padding: 140px 40px;
  background: #fff;
}

.team-inner {
  max-width: 900px;
  margin: 0 auto;
}

.team h2 {
  font-size: 44px;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: #111;
}

.team-intro {
  max-width: 600px;
  font-size: 17px;
  line-height: 1.7;
  color: #444;
  margin-bottom: 72px;
}

/* grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 64px;
}

/* člen */
.team-member {
  text-align: left;
}

.team-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 20px;
  margin-bottom: 20px;
  background: #f0f0f0;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* text */
.team-member h3 {
  font-size: 20px;
  margin-bottom: 6px;
  color: #111;
}

.team-member p {
  font-size: 15px;
  color: #666;
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 768px) {
  .team {
    padding: 100px 24px;
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}




/* =========================
   FAQ – ACCORDION
========================= */

.faq {
  padding: 140px 40px;
  background: #f7f7f7;
}

.faq-inner {
  max-width: 900px;
  margin: 0 auto;
}

.faq h2 {
  font-size: 44px;
  font-weight: 700;
  margin-bottom: 64px;
  letter-spacing: -0.02em;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

/* question button */
.faq-item {
  width: 100%;
  background: none;
  border: none;
  border-bottom: 1px solid #ddd;
  padding: 24px 0;
  font-size: 18px;
  font-weight: 500;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: #111;
}

/* plus / minus */
.faq-icon {
  font-size: 24px;
  transition: transform 0.3s ease;
}

/* answer */
.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-content p {
  padding: 16px 0 24px;
  font-size: 16px;
  line-height: 1.7;
  color: #444;
}

/* active state */
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 768px) {
  .faq {
    padding: 100px 24px;
  }

  .faq h2 {
    font-size: 36px;
  }

  .faq-item {
    font-size: 16px;
  }
}










/* =========================
   CONTACT – HIDDEN
========================= */

.contact {
  display: none;
  padding: 140px 40px;
  background: #fff;
  border-top: 1px solid #eee;
}

.contact-inner {
  max-width: 700px;
  margin: 0 auto;
}

.contact h2 {
  font-size: 44px;
  margin-bottom: 24px;
}

.contact-intro {
  font-size: 17px;
  line-height: 1.7;
  color: #444;
  margin-bottom: 48px;
}

/* form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

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

.form-group label {
  font-size: 14px;
  margin-bottom: 6px;
  color: #111;
}

.form-group input,
.form-group textarea {
  padding: 14px 16px;
  font-size: 15px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #111;
}

/* responsive */
@media (max-width: 768px) {
  .contact {
    padding: 100px 24px;
  }

  .contact h2 {
    font-size: 36px;
  }
}













/* =========================
   FOOTER – AERYX
========================= */

.site-footer {
  background: #111;
  color: #fff;
  padding: 80px 40px 40px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

/* horní část */
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-logo {
  height: 82px;
  margin-bottom: 4px;
}

.footer-brand p {
  font-size: 15px;
  line-height: 1.7;
  color: #ccc;
  max-width: 360px;
}

/* odkazy */
.footer-links h4 {
  font-size: 15px;
  margin-bottom: 16px;
  color: #fff;
}

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

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links a {
  text-decoration: none;
  font-size: 14px;
  color: #bbb;
}

.footer-links a:hover {
  color: #fff;
}

/* spodní část */
.footer-bottom {
  border-top: 1px solid #222;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 13px;
  color: #aaa;
  margin-bottom: 6px;
}

.footer-small {
  color: #666;
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}