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

:root {
  --bg-primary: #10241b;
  --surface: rgba(38, 70, 55, 0.45);
  --surface-strong: rgba(50, 92, 70, 0.6);
  --border: rgba(196, 255, 221, 0.25);
  --text-primary: #f0fff6;
  --text-secondary: #cdebd9;
  --accent: #2ecc8a;
  --accent-hover: #24b279;
  --chip-bg: rgba(210, 255, 231, 0.16);
  --chip-text: #e0ffe7;
  --transition: 0.3s ease;
  --typing-font: 'Space Mono', 'Fira Code', 'JetBrains Mono', monospace;
}

html,
body {
  min-height: 100%;
}

body {
  font-family: 'Poppins', sans-serif;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  padding-bottom: 120px;
  background: #7de2a4;
}

.video-hero {
  position: relative;
  height: min(780px, calc(100vh - 120px));
  min-height: 640px;
  max-height: 820px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 120px;
  scroll-snap-align: start;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1100px, 100%);
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  padding: 110px 24px 110px;
  flex: 1;
}

.video-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -2;
  pointer-events: none;
}

.video-background video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
}

.site-header,
.typing-banner,
.carousel,
.hero,
section.content {
  position: relative;
  z-index: 1;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: rgba(10, 12, 14, 0.55);
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  top: 24px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 16px;
  z-index: 1000;
}

.header-container {
  width: min(1100px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 26px;
  padding: 16px 26px;
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  transition: padding var(--transition), gap var(--transition), border-radius var(--transition), background var(--transition);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-transform: lowercase;
  font-size: 22px;
  letter-spacing: 0.04em;
}

.brand-text {
  color: var(--text-primary);
}

.primary-nav {
  flex: 1;
}

.primary-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
  justify-content: center;
}

.primary-nav a {
  color: var(--text-secondary);
  font-size: 17px;
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 100%;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}

.primary-nav a:hover,
.primary-nav a:focus {
  color: var(--text-primary);
}

.primary-nav a:hover::after,
.primary-nav a:focus::after {
  background: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.chip {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--chip-text);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition);
}

.chip:hover,
.chip:focus {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-primary);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 15px;
  box-shadow: none;
  transition:
    background var(--transition),
    transform var(--transition);
}

.cta:hover,
.cta:focus {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.menu-toggle {
  position: relative;
  width: 22px;
  height: 16px;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  transition: transform var(--transition);
}

.menu-toggle:hover,
.menu-toggle:focus {
  transform: scale(1.06);
}

.menu-toggle .menu-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 999px;
  transition: opacity 0s;
}

.menu-toggle.is-active .menu-bar {
  opacity: 0;
}

.menu-toggle.is-active::before,
.menu-toggle.is-active::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  margin-top: -1px;
  border-radius: 999px;
  background: var(--text-primary);
}

.menu-toggle.is-active::before {
  transform: rotate(45deg);
}

.menu-toggle.is-active::after {
  transform: rotate(-45deg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.typing-banner {
  margin: 0 auto 28px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
  gap: 22px;
  min-height: 80px;
}

.typing-banner__inner {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: none;
  backdrop-filter: none;
  box-shadow: none;
}

.typing-banner__text {
  font-family: var(--typing-font);
  font-size: clamp(32px, 3.6vw, 50px);
  letter-spacing: 0.1em;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  display: inline-block;
  min-width: 0;
}

.typing-banner__cursor {
  position: relative;
  width: 3px;
  height: 40px;
  border-radius: 1px;
  background: var(--text-primary);
  animation: blink 0.7s steps(1) infinite;
  margin-left: 6px;
}

.typing-banner__cursor.is-idle {
  animation: blink 1.2s steps(1) infinite;
}

.typing-banner__subtitle {
  max-width: 820px;
  font-size: clamp(19px, 2vw, 26px);
  color: #ffffff;
  font-weight: 600;
  line-height: 1.6;
  margin: 0;
  padding: 0 26px;
}

.typing-banner__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 18px 48px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--text-primary);
  font-weight: 600;
  font-size: clamp(18px, 2.1vw, 22px);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 18px 40px rgba(46, 204, 138, 0.35);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.scroll-indicator {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  margin-top: auto;
  margin-bottom: 130px;
  transition: transform var(--transition);
}

.scroll-indicator img {
  width: 100%;
  height: 100%;
  transform: rotate(90deg);
  filter: brightness(0) invert(1);
  transition: transform var(--transition), opacity var(--transition);
  opacity: 0.92;
}

.scroll-indicator:hover,
.scroll-indicator:focus {
  transform: translateY(8px);
}

.scroll-indicator:hover img,
.scroll-indicator:focus img {
  opacity: 1;
  transform: rotate(90deg) scale(1.1);
}

.typing-banner__cta:hover,
.typing-banner__cta:focus {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 22px 50px rgba(36, 178, 121, 0.4);
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  50.0001%, 100% {
    opacity: 0;
  }
}

.typing-banner__text::after {
  content: attr(data-rendered);
}

.carousel {
  width: min(1100px, calc(100% - 48px));
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.carousel-shell {
  position: relative;
  width: 100%;
  min-height: 0;
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 0;
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.carousel-viewport {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  flex: 1 1 auto;
  height: 450px;
}

.carousel-track {
  display: flex;
  align-items: stretch;
  gap: 0;
  transition: transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
  transform: translateX(calc(-100% * var(--carousel-index, 0)));
}

.carousel-slide {
  position: relative;
  flex: 0 0 100%;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--text-primary);
  height: 100%;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.1);
}

.carousel-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 8, 12, 0) 30%, rgba(8, 8, 12, 0.75) 95%);
}

.carousel-slide figcaption {
  position: absolute;
  bottom: 18px;
  left: 24px;
  right: 24px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border: none;
  padding: 0;
  background: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.carousel-control::before {
  content: "";
  width: 100%;
  height: 100%;
  background-image: url('img/icons/next.png');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  filter: brightness(0) invert(1);
}

.carousel-control.prev {
  left: 24px;
  transform: translateY(-50%);
}

.carousel-control.next {
  right: 24px;
}

.carousel-control.prev::before {
  transform: rotate(180deg);
}

.carousel-control:hover,
.carousel-control:focus {
  transform: translateY(-50%) scale(1.08);
}

.carousel-dots {
  display: inline-flex;
  gap: 10px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.carousel-dot:hover,
.carousel-dot:focus {
  background: rgba(255, 255, 255, 0.35);
  transform: scale(1.1);
}

.carousel-dot.is-active {
  background: var(--accent);
}

.site-header.is-open .header-container {
  background: var(--surface-strong);
  border-radius: 30px;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  padding: 18px 24px 24px;
}

.site-header.is-open .brand {
  order: 1;
}

.site-header.is-open .header-actions {
  order: 2;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-header.is-open .primary-nav {
  order: 3;
  flex-basis: 100%;
  display: block;
}

.site-header.is-open .primary-nav ul {
  display: flex;
  width: 100%;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.hero {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 24px;
  background: transparent;
}

.content {
  max-width: 800px;
  margin: 180px auto 0;
  line-height: 1.7;
  font-size: 18px;
  color: var(--text-secondary);
}

.level-cards {
  position: relative;
  z-index: 3;
  margin: 80px auto 80px;
  padding: 40px 24px;
  width: min(1100px, 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.level-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 24px 28px 50px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.85);
  color: #1c1d21;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.06em;
  box-shadow: 0 25px 45px rgba(12, 18, 16, 0.15);
  border: 1px solid rgba(0, 0, 0, 0.06);
  gap: 20px;
  min-height: 240px;
  transition: transform var(--transition), box-shadow var(--transition), color var(--transition), background var(--transition);
  cursor: pointer;
  flex: 1 1 320px;
  max-width: 340px;
}

.level-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.level-card__icon img {
  width: 70px;
  height: 70px;
  filter: drop-shadow(0 12px 22px rgba(15, 25, 22, 0.28));
}

.level-card__body {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 22px;
}

.level-card__tagline {
  margin: 6px 0 12px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  align-self: center;
  width: 100%;
  color: rgba(30, 40, 35, 0.65);
}

.level-card__title {
  font-size: 20px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.level-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(30, 40, 35, 0.82);
}

.level-card__list li + li {
  margin-top: 10px;
  border-top: 1px solid rgba(30, 40, 35, 0.18);
  padding-top: 10px;
}

.level-card__list a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.level-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 12px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  background: rgba(44, 204, 138, 0.16);
  color: #1f3f2f;
}

.level-card__list li:nth-child(2) .level-tag {
  background: rgba(44, 204, 138, 0.26);
}

.level-card__list li:nth-child(3) .level-tag {
  background: rgba(44, 204, 138, 0.36);
}

.level-card__list a:hover,
.level-card__list a:focus {
  color: var(--accent-hover);
}

.level-card:hover,
.level-card:focus {
  transform: none;
  background: #ffffff;
  box-shadow: 0 30px 65px rgba(12, 18, 16, 0.18);
  color: #0f2b1f;
}

.content h2 {
  font-size: clamp(44px, 5vw, 60px);
  margin-bottom: 20px;
  color: var(--text-primary);
  font-weight: 600;
  text-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
}

.content p {
  font-size: 20px;
  margin-bottom: 28px;
}

.content button {
  background: var(--accent);
  border: none;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 16px;
  color: var(--text-primary);
  cursor: pointer;
  transition:
    background var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
  box-shadow: 0 16px 30px rgba(26, 107, 255, 0.27);
}

.content button:hover,
.content button:focus {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 20px 38px rgba(26, 107, 255, 0.33);
}

section.content {
  padding: 180px 24px 60px;
  max-width: 900px;
}

section.content h2 {
  margin-bottom: 16px;
}

section.content p {
  margin-bottom: 18px;
}

@media (max-width: 1100px) {
  .header-container {
    gap: 14px;
    padding: 14px 20px;
  }

  .primary-nav ul {
    gap: 20px;
  }
}

@media (max-width: 900px) {
  .carousel {
    width: calc(100% - 36px);
    margin: 120px auto 0;
  }

  .carousel-shell {
    min-height: 0;
  }

  .carousel-control {
    width: 38px;
    height: 38px;
  }

  .carousel-slide figcaption {
    font-size: 16px;
    bottom: 16px;
  }

  .carousel-viewport {
    height: 330px;
  }

  .primary-nav {
    display: none;
    width: 100%;
  }

  .primary-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-actions .chip {
    display: none;
  }

  .site-header.is-open .primary-nav {
    display: block;
  }

  .site-header.is-open .primary-nav ul {
    gap: 18px;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
  }
}

@media (max-width: 600px) {
  .carousel {
    width: calc(100% - 24px);
    margin-top: 110px;
  }

  .carousel-shell {
    padding: 0;
  }

  .carousel-viewport {
    height: 300px;
  }

  .header-container {
    border-radius: 22px;
    padding: 12px 18px;
  }

  .content {
    margin-top: 160px;
    padding: 0 12px;
  }

  section.content {
    padding-top: 120px;
  }
}