/* Основные переменные */
:root {
  --color-black: #0a0a0a;
  --color-dark: #1a1a1a;
  --color-purple: #8b5cf6;
  --color-purple-dark: #7c3aed;
  --color-pink: #ec4899;
  --color-pink-dark: #db2777;
  --color-gradient: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --color-gradient-hover: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
  --color-text: #f0f0f0;
  --color-text-secondary: #b0b0b0;
  --color-border: rgba(139, 92, 246, 0.3);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--color-black);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Хедер */
.header {
  background: var(--color-dark);
  border-bottom: 2px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.2);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  gap: 20px;
}

.logo {
  flex-shrink: 0;
}

.logo img {
  height: 40px;
  width: 80px;
  transition: var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo img:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.6));
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-purple);
  border-radius: 3px;
  transition: var(--transition);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 15px;
  align-items: center;
}

.nav-list li a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 15px;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  white-space: nowrap;
}

.nav-list li a::before {
  content: "";
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-gradient);
  transition: var(--transition);
}

.nav-list li a:hover {
  color: var(--color-purple);
}

.nav-list li a:hover::before {
  width: 80%;
}

/* Кнопка регистрации в хедере */
.register-btn {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-gradient);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
  white-space: nowrap;
  flex-shrink: 0;
}

.register-btn:hover {
  background: var(--color-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

/* Баннеры */
.banner-top,
.banner-middle {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.3);
}

.banner-top {
  margin: 30px auto;
}

.banner-middle {
  margin: 50px auto;
}

.banner-top img,
.banner-middle img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.banner-top img:hover,
.banner-middle img:hover {
  transform: scale(1.02);
}

/* Карусель баннеров */
.banner-carousel {
  width: 100%;
  max-width: 1200px;
  margin: 30px auto;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.3);
  position: relative;
  background: var(--color-dark);
}

.banner-carousel::before {
  content: "";
  display: block;
  padding-top: 20.833%; /* 400/1920 * 100% для соотношения сторон */
}

.banner-carousel-link {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-decoration: none;
}

.banner-carousel-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
}

.banner-carousel-item.active {
  opacity: 1;
  z-index: 1;
}

.banner-carousel-item img {
  width: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* Основной контент */
.main-content {
  flex: 1;
  padding: 40px 0;
}

section {
  background: var(--color-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px;
  margin-bottom: 30px;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.1);
  transition: var(--transition);
}

section:hover {
  border-color: var(--color-purple);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.2);
}

h1 {
  font-size: 2.5rem;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  line-height: 1.3;
}

h2 {
  font-size: 2rem;
  color: var(--color-purple);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 15px;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: var(--color-gradient);
  border-radius: 3px;
}

p {
  margin-bottom: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

ul {
  padding-left: 20px;
}

ul li {
  color: var(--color-text-secondary);
  position: relative;
}

ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-pink);
  font-weight: bold;
  line-height: 1;
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

/* FAQ стили */
dl {
  margin-top: 20px;
}

dt {
  font-weight: 600;
  color: var(--color-text);
  font-size: 1.1rem;
  margin: 25px 0 10px 0;
  padding: 15px;
  background: rgba(139, 92, 246, 0.1);
  border-left: 4px solid var(--color-purple);
  border-radius: 8px;
}

dd {
  margin-left: 20px;
  margin-bottom: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* Плашка с бонусом */
.bonus-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-gradient);
  padding: 15px 20px;
  z-index: 999;
  box-shadow: 0 -4px 20px rgba(139, 92, 246, 0.4);
  transform: translateY(100%);
  transition: transform 0.3s ease-out;
}

.bonus-banner.show {
  transform: translateY(0);
}

.bonus-banner-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.bonus-banner-text {
  color: white;
  font-size: 1rem;
  font-weight: 500;
  margin: 0;
  flex: 1;
  min-width: 200px;
}

.bonus-banner-button {
  display: inline-block;
  padding: 12px 30px;
  background: white;
  color: var(--color-purple);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.bonus-banner-button:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Кнопка "вверх" */
.scroll-top-btn {
  position: fixed;
  bottom: 90px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: var(--color-gradient);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top-btn:hover {
  background: var(--color-gradient-hover);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

.scroll-top-btn.show {
  opacity: 1;
  visibility: visible;
}

/* Футер */
.footer {
  background: var(--color-dark);
  border-top: 2px solid var(--color-border);
  margin-top: 60px;
  padding: 50px 0 20px;
  padding-bottom: calc(20px + 80px); /* Отступ снизу для плашки */
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.footer-logo img {
  height: 40px;
  width: 80px;
  margin-bottom: 20px;
}

.footer-text {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links li::before {
  display: none;
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-purple);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Страница ошибки 404 */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-content {
  text-align: center;
  padding: 60px 40px;
  background: var(--color-dark);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.2);
}

.error-number {
  font-size: 8rem;
  font-weight: 700;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 20px;
}

.error-title {
  font-size: 2rem;
  color: var(--color-text);
  margin-bottom: 15px;
  font-weight: 600;
}

.error-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
}

.error-button {
  display: inline-block;
  padding: 15px 40px;
  background: var(--color-gradient);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.error-button:hover {
  background: var(--color-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

/* Адаптивность */
@media (max-width: 1024px) {
  .nav-list {
    gap: 10px;
  }

  .nav-list li a {
    font-size: 0.9rem;
    padding: 8px 12px;
  }

  .register-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    order: 2;
  }

  .nav {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    justify-content: flex-end;
  }

  .register-btn {
    order: 1;
  }

  .nav-list {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--color-dark);
    flex-direction: column;
    width: 250px;
    padding: 20px;
    margin-top: 15px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    order: 3;
  }

  .nav-list.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    display: block;
    width: 100%;
    padding: 12px 15px;
  }

  .register-btn {
    padding: 8px 18px;
    font-size: 0.85rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  section {
    padding: 25px 20px;
  }

  .banner-top,
  .banner-middle {
    margin: 20px auto;
    border-radius: 8px;
  }

  .banner-carousel {
    margin: 20px auto;
    border-radius: 8px;
  }

  .banner-carousel::before {
    padding-top: 30%; /* Более высокий баннер на мобильных */
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
    text-align: center;
  }

  .footer-section {
    text-align: center;
    align-items: center;
  }

  .footer-logo {
    display: flex;
    justify-content: center;
  }

  .footer-links a:hover {
    transform: translateX(0);
  }

  .error-number {
    font-size: 5rem;
  }

  .error-title {
    font-size: 1.5rem;
  }

  .error-content {
    padding: 40px 20px;
  }

  .bonus-banner {
    padding: 10px 15px;
  }

  .bonus-banner-content {
    flex-direction: row;
    text-align: center;
    gap: 10px;
    align-items: center;
  }

  .bonus-banner-text {
    text-align: left;
    font-size: 0.85rem;
    flex: 1;
    min-width: 0;
    line-height: 1.3;
  }

  .bonus-banner-button {
    padding: 8px 20px;
    font-size: 0.85rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .scroll-top-btn {
    bottom: 75px;
    right: 15px;
    width: 45px;
    height: 45px;
    font-size: 20px;
  }

  .footer {
    padding-bottom: calc(20px + 60px);
  }
}

@media (max-width: 480px) {
  .logo img {
    height: 40px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  .nav-list {
    width: calc(100vw - 40px);
  }

  section {
    padding: 20px 15px;
  }

  .error-number {
    font-size: 4rem;
  }

  .error-button {
    padding: 12px 30px;
    font-size: 0.95rem;
  }

  .bonus-banner {
    padding: 8px 12px;
  }

  .bonus-banner-content {
    gap: 8px;
  }

  .bonus-banner-text {
    font-size: 0.75rem;
    line-height: 1.2;
  }

  .bonus-banner-button {
    padding: 6px 16px;
    font-size: 0.75rem;
    border-radius: 6px;
  }

  .scroll-top-btn {
    bottom: 60px;
    right: 10px;
    width: 38px;
    height: 38px;
    font-size: 16px;
  }

  .footer {
    padding-bottom: calc(20px + 55px);
  }

  .banner-carousel::before {
    padding-top: 35%; /* Еще более высокий баннер на очень маленьких экранах */
  }
}

/* Анимации */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

section {
  animation: fadeIn 0.6s ease-out;
}

/* Скроллбар */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--color-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gradient);
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gradient-hover);
}

/* Выделение текста */
::selection {
  background: var(--color-purple);
  color: white;
}

::-moz-selection {
  background: var(--color-purple);
  color: white;
}