body {
  margin: 0;
  background: #000 !important;
  color: #fff !important;
}

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

/* Date Time Display */
#dateTime {
  position: absolute;
  top: 20px;
  right: 20px;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 26, 0.95),
    rgba(15, 15, 15, 0.95)
  );
  border: 2px solid #e10600;
  border-radius: 12px;
  padding: 15px 25px;
  font-family: "Titillium Web", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 2px;
  box-shadow: 0 4px 20px rgba(225, 6, 0, 0.4);
  backdrop-filter: blur(10px);
  z-index: 100;
  animation: dateGlow 2s ease-in-out infinite;
}

@keyframes dateGlow {
  0%,
  100% {
    box-shadow: 0 4px 20px rgba(225, 6, 0, 0.4);
    border-color: #e10600;
  }
  50% {
    box-shadow: 0 6px 30px rgba(225, 6, 0, 0.7);
    border-color: #ff1e00;
  }
}

#dateTime::before {
  content: "🏁";
  margin-right: 10px;
  font-size: 1.3rem;
  animation: flagWave 1s ease-in-out infinite;
}

@keyframes flagWave {
  0%,
  100% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(15deg);
  }
}

/* Change Background Button */
#changeBg {
  position: absolute;
  left: 20px;
  background: linear-gradient(135deg, #e10600 0%, #ff1e00 100%);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 12px 30px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.4);
  z-index: 100;
}

#changeBg::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

#changeBg:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(225, 6, 0, 0.6);
}

#changeBg:hover::before {
  left: 100%;
}

#changeBg:active {
  transform: translateY(-1px) scale(1.02);
}

#changeBg::after {
  content: "🎨";
  margin-left: 8px;
}

/* Hero Section Enhanced */
.hero-section {
  position: relative;
  overflow: visible !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  #dateTime {
    top: 10px;
    right: 10px;
    font-size: 0.8rem;
    padding: 10px 15px;
    letter-spacing: 1px;
  }

  #dateTime::before {
    font-size: 1rem;
    margin-right: 5px;
  }

  #changeBg {
    top: 10px;
    left: 10px;
    font-size: 0.85rem;
    padding: 10px 20px;
    letter-spacing: 1px;
  }

  #changeBg::after {
    margin-left: 5px;
  }
}

@media (max-width: 576px) {
  #dateTime {
    position: static;
    margin: 0 auto 15px;
    display: inline-block;
  }

  #changeBg {
    position: static;
    margin: 0 auto 15px;
    display: block;
    width: fit-content;
  }
}
h2 {
  font-size: 3.5rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 4px;
  background: linear-gradient(90deg, #e10600 0%, #ff1e00 50%, #ffffff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 40px;
  position: relative;
  padding-left: 20px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 80%;
  background: #e10600;
  box-shadow: 0 0 20px #e10600;
}

.accordion {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.accordion-item {
  background: linear-gradient(145deg, #1a1a1a, #0f0f0f);
  border-left: 4px solid #e10600;
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.accordion-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(225, 6, 0, 0.1) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.accordion-item:hover {
  transform: translateX(10px);
  border-left-width: 6px;
  box-shadow: 0 8px 30px rgba(225, 6, 0, 0.4);
}

.accordion-item:hover::before {
  opacity: 1;
}

.faq {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px;
}

details {
  background: linear-gradient(135deg, #e10600 0%, #15151e 100%);
  border: 2px solid #e10600;
  border-radius: 12px;
  margin-bottom: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.2);
}

details:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(225, 6, 0, 0.4);
  border-color: #ff1e00;
}

details[open] {
  background: linear-gradient(135deg, #15151e 0%, #e10600 100%);
  border-color: #ff1e00;
}

summary {
  padding: 20px 25px;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: bold;
  color: #ffffff;
  list-style: none;
  position: relative;
  user-select: none;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "▶";
  position: absolute;
  right: 25px;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transition: transform 0.3s ease;
  color: #e10600;
  font-size: 0.9rem;
  filter: drop-shadow(0 0 5px rgba(225, 6, 0, 0.5));
}

details[open] summary::after {
  transform: translateY(-50%) rotate(90deg);
  color: #ff1e00;
}

summary:hover {
  background: rgba(255, 255, 255, 0.05);
}

summary:hover::after {
  color: #ff1e00;
  filter: drop-shadow(0 0 10px rgba(255, 30, 0, 0.8));
}

p {
  padding: 0 25px 25px 25px;
  margin: 0;
  color: #ffffff;
  font-size: 1rem;
  line-height: 1.6;
  animation: fadeIn 0.4s ease;
  
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Акцент в стиле гоночных полос */
details::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, #e10600, #ff1e00, #e10600);
  opacity: 0;
  transition: opacity 0.3s ease;
}

details:hover::before {
  opacity: 1;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  padding: 0 30px;
  font-size: 1.1rem;
  line-height: 1.8;
  color: #cccccc;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: rgba(0, 0, 0, 0.3);
}

.accordion-item.active .accordion-content {
  max-height: 500px;
  padding: 25px 30px;
  border-top: 1px solid rgba(225, 6, 0, 0.3);
}

/* Racing stripes effect */
.accordion-item::after {
  content: "";
  position: absolute;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  transition: right 0.6s ease;
}

.accordion-item:hover::after {
  right: 100%;
}

/* Speed lines animation */
@keyframes speedLines {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* F1 Style Popup */
.popup-Title {
  font-family: "Titillium Web", sans-serif;
  font-size: 2rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: #ffffff;
  text-align: center;
  margin-top: 40px;
  position: relative;
  padding-bottom: 15px;
}
.popupis {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
#openPopup {
  background: linear-gradient(135deg, #e10600 0%, #ff1e00 100%);
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 10px;
  margin-bottom: 40px;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 15px 40px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.4);
}

#openPopup::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

#openPopup:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(225, 6, 0, 0.6);
}

#openPopup:hover::before {
  left: 100%;
}

#openPopup:active {
  transform: translateY(-1px);
}

.popup {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
}

.popup.show {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.popup-content {
  background: linear-gradient(145deg, #1a1a1a, #0f0f0f);
  padding: 40px;
  border-radius: 12px;
  border-left: 6px solid #e10600;
  box-shadow: 0 10px 50px rgba(225, 6, 0, 0.5);
  position: relative;
  max-width: 500px;
  width: 90%;
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.popup-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(225, 6, 0, 0.1) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

.close {
  color: #888;
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 35px;
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  z-index: 10;
}

.close:hover {
  color: #e10600;
  background: rgba(225, 6, 0, 0.2);
  transform: rotate(90deg);
  text-shadow: 0 0 10px rgba(225, 6, 0, 0.5);
}

.popup-content h3 {
  font-family: "Titillium Web", sans-serif;
  font-size: 2rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: #ffffff;
  margin: 0 0 30px 0;
  position: relative;
  padding-bottom: 15px;
  z-index: 1;
}

.popup-content h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, #e10600, transparent);
  box-shadow: 0 0 10px rgba(225, 6, 0, 0.5);
}

#popupForm {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
  z-index: 1;
}

#popupEmail {
  font-family: "Titillium Web", sans-serif;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 15px 20px;
  font-size: 1rem;
  color: #ffffff;
  transition: all 0.3s ease;
  outline: none;
}

#popupEmail::placeholder {
  color: #666;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

#popupEmail:focus {
  border-color: #e10600;
  background: rgba(225, 6, 0, 0.05);
  box-shadow: 0 0 20px rgba(225, 6, 0, 0.3);
}

#popupForm button[type="submit"] {
  background: linear-gradient(135deg, #e10600 0%, #ff1e00 100%);
  color: #ffffff;
  font-family: "Titillium Web", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 15px 30px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.4);
  margin-top: 10px;
}

#popupForm button[type="submit"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

#popupForm button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(225, 6, 0, 0.6);
}

#popupForm button[type="submit"]:hover::before {
  left: 100%;
}

#popupForm button[type="submit"]:active {
  transform: translateY(0);
}

.popup-content::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(225, 6, 0, 0.03) 10px,
    rgba(225, 6, 0, 0.03) 20px
  );
  pointer-events: none;
  z-index: 0;
}

@media (max-width: 768px) {
  .popup-content {
    padding: 30px 20px;
    width: 95%;
  }

  .popup-content h3 {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }

  #popupEmail {
    padding: 12px 15px;
  }

  #openPopup {
    font-size: 1rem;
    padding: 12px 30px;
  }
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  font-size: 1rem;
}

/* Tablet */
@media (min-width: 768px) {
  h1 {
    font-size: 3.5rem;
  }
  h2 {
    font-size: 2.5rem;
  }
  h3 {
    font-size: 1.75rem;
  }
  p {
    font-size: 1.1rem;
  }
}

/* Desktop */
@media (min-width: 992px) {
  h1 {
    font-size: 4rem;
  }
  h2 {
    font-size: 3rem;
  }
  h3 {
    font-size: 2rem;
  }
  p {
    font-size: 1.2rem;
  }
}

@media (max-width: 576px) {
  .navbar-brand img {
    margin-left: 0;
    width: 80px;
    height: 60px;
  }

  .logof1 {
    width: 300px !important;
  }
}
.navbar-dark .navbar-nav .nav-link {
  color: #fff !important;
  transition: color 0.3s;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: #e10600 !important;
}

/* Hero Section */
.hero-section {
  position: relative;
  text-align: center;
  background: linear-gradient(135deg, #000 0%, #1a1a1a 50%, #e10600 100%);
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(225, 6, 0, 0.1) 2px,
    rgba(225, 6, 0, 0.1) 4px
  );
  opacity: 0.3;
  animation: scanlines 8s linear infinite;
}

@keyframes scanlines {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(50px);
  }
}

.hero-title {
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 900;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 3px;
  background: linear-gradient(90deg, #fff, #e10600, #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: titleShine 3s ease-in-out infinite;
  background-size: 200% auto;
}

@keyframes titleShine {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero-subtitle {
  color: #ccc;
  position: relative;
  max-width: 800px;
}

.hero-tagline {
  color: #e10600;
  font-weight: 600;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* Section Title */
.section-title {
  text-align: center;
  font-weight: 700;
  color: #e10600;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 20px rgba(225, 6, 0, 0.5);
}

.signupbutton {
  display: none;
  text-decoration: none;
  background: linear-gradient(135deg, #e10600 0%, #ff1e00 100%) !important;
  color: #ffffff !important;
  font-weight: 700;
  text-transform: uppercase;
  padding: 12px 30px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.4);
}

.signupbutton:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(225, 6, 0, 0.6);
}

@media (min-width: 700px) {
  .signupbutton {
    display: block;
  }
}

/* Task 2 & Task 8: Cards */
.f1-card {
  position: relative;
  background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
  border-radius: 1.5rem;
  overflow: hidden;
  transition: all 0.4s ease;
  cursor: pointer;
  border: 2px solid #333;
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}

.f1-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: #e10600;
  box-shadow: 0 20px 60px rgba(225, 6, 0, 0.4), 0 0 40px rgba(225, 6, 0, 0.2);
}

.f1-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(225, 6, 0, 0.3),
    transparent
  );
  transition: left 0.5s;
  z-index: 1;
}

.f1-card:hover::before {
  left: 100%;
}

.card-image-container {
  position: relative;
  height: 300px;
  overflow: hidden;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.f1-card:hover .card-image {
  transform: scale(1.1);
}

.card-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(135deg, #e10600, #ff4444);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  box-shadow: 0 4px 15px rgba(225, 6, 0, 0.5);
  z-index: 2;
}

.special-badge {
  background: linear-gradient(135deg, #ffd700, #ffa500);
  color: #000;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.5);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 4px 25px rgba(255, 215, 0, 0.8);
  }
}

.card-content {
  position: relative;
}

.card-flag {
  font-size: 3rem;
}

.card-title {
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
}

.card-circuit {
  font-size: 1rem;
  color: #e10600;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-description {
  color: #bbb;
  line-height: 1.6;
}

.card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feature-tag {
  background: rgba(225, 6, 0, 0.2);
  color: #e10600;
  border-radius: 20px;
  font-size: 0.85rem;
  border: 1px solid rgba(225, 6, 0, 0.3);
}

.card-price {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #333;
}

.price-label {
  font-size: 0.9rem;
  color: #888;
}

.price-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: #e10600;
}

/* Info Banner */
.info-banner {
  background: linear-gradient(135deg, #1a1a1a, #000);
  border-radius: 1.5rem;
  border: 2px solid #e10600;
  text-align: center;
}

.info-banner h3 {
  color: #e10600;
}

.info-banner p {
  color: #ccc;
  max-width: 800px;
  line-height: 1.8;
}

/* Footer */
.footer {
  background: #000;
  border-top: 3px solid #e10600;
  color: #bbb;
}

.footer-title {
  color: #e10600;
}

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

.footer-list li:hover {
  color: #e10600;
  cursor: pointer;
}

.footer-logo {
  max-width: 150px;
}

/* Task 7: Carousel */
.carousel-item img {
  height: 500px;
  object-fit: cover;
}

.carousel-indicators button {
  background-color: #e10600;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
  color: #e10600;
  filter: invert(1);
}

/* Task 9: Form */
.form-control:focus,
.form-select:focus {
  border-color: #e10600;
  box-shadow: 0 0 0 0.2rem rgba(225, 6, 0, 0.25);
}

.form-label {
  color: #fff;
  font-weight: 600;
}

.form-check-label {
  color: #ccc;
}