:root {
  --color-bg: #111111;
  --color-bg-deep: #0a0a0a;
  --color-panel: #171717;
  --color-panel-soft: #1d1d1d;
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-strong: rgba(255, 255, 255, 0.22);
  --color-text: #f6f6f6;
  --color-muted: #b9b9b9;
  --color-soft: #8f8f8f;
  --color-accent: #ffffff;
  --shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.28);
  --container: 1120px;
  --header-height: 116px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

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

p,
h1,
h2,
h3 {
  margin: 0;
}

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--header-height);
  background: #0d0d0d;
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.brand__logo {
  width: auto;
  height: 78px;
  object-fit: contain;
}

.brand__text {
  color: #b8b8b8;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav__links a {
  position: relative;
  display: inline-flex;
  padding-block: 6px;
  transition: color 180ms ease;
}

.nav__links a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--color-text);
  content: "";
  opacity: 0;
  transform: scaleX(0.6);
  transition: opacity 180ms ease, transform 180ms ease;
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--color-text);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - var(--header-height));
  overflow: hidden;
  background-image: url("assets/background-comic.png");
  background-position: center;
  background-size: cover;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.42)),
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.05) 0,
      rgba(255, 255, 255, 0.05) 1px,
      transparent 1px,
      transparent 18px
    );
  content: "";
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at center, rgba(17, 17, 17, 0.2), rgba(5, 5, 5, 0.9));
}

.hero__content {
  display: grid;
  place-items: center;
  align-content: center;
  padding-block: clamp(92px, 13vw, 164px);
  text-align: center;
}

.eyebrow,
.section__label {
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 900px;
  margin-top: 18px;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 0.98;
}

.hero__subtitle {
  max-width: 720px;
  margin-top: 26px;
  color: #e0e0e0;
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 1px solid var(--color-border-strong);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease,
    transform 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--color-text);
  color: #101010;
  border-color: var(--color-text);
}

.button--primary:hover,
.button--primary:focus-visible {
  background: transparent;
  color: var(--color-text);
}

.button--secondary {
  background: rgba(17, 17, 17, 0.54);
  color: var(--color-text);
  backdrop-filter: blur(10px);
}

.button--secondary:hover,
.button--secondary:focus-visible {
  background: var(--color-text);
  color: #101010;
}

.section {
  padding-block: clamp(72px, 10vw, 112px);
  background:
    linear-gradient(rgba(17, 17, 17, 0.93), rgba(17, 17, 17, 0.93)),
    url("assets/background-comic.png");
  background-position: center;
  background-size: cover;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.section--intro {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 42%),
    linear-gradient(rgba(10, 10, 10, 0.95), rgba(10, 10, 10, 0.95)),
    url("assets/background-comic.png");
  background-position: center top;
  background-size: cover;
}

.section--material {
  background:
    linear-gradient(rgba(23, 23, 23, 0.92), rgba(23, 23, 23, 0.92)),
    url("assets/background-comic.png");
  background-position: center 45%;
  background-size: cover;
}

.section__grid,
.material {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(34px, 7vw, 88px);
  align-items: start;
}

.section h2 {
  margin-top: 8px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.04;
}

.section__copy,
.section__header p,
.material__content {
  color: var(--color-muted);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
}

.section__copy {
  display: grid;
  gap: 18px;
}

.section__header {
  max-width: 760px;
  margin-bottom: 34px;
}

.section__header h2 {
  margin-bottom: 16px;
}

.section__header--compact {
  margin-bottom: 28px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 148px;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02)),
    var(--color-panel-soft);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.card__mark {
  display: block;
  width: 36px;
  height: 4px;
  margin-bottom: 36px;
  background: var(--color-text);
}

.card h3 {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 900;
  line-height: 1.2;
}

.material__content {
  display: grid;
  justify-items: start;
  gap: 26px;
}

.progress {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.progress::before {
  position: absolute;
  top: 23px;
  right: 7%;
  left: 7%;
  height: 1px;
  background: var(--color-border);
  content: "";
}

.progress__item {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 16px;
  min-height: 128px;
  padding: 0 14px 22px;
  color: var(--color-muted);
  text-align: center;
}

.progress__check {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--color-text);
  color: #0f0f0f;
  border: 6px solid var(--color-bg);
  border-radius: 50%;
  font-weight: 900;
  line-height: 1;
}

.footer {
  position: relative;
  overflow: hidden;
  padding-block: 54px 26px;
  background: #090909;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  isolation: isolate;
}

.footer::before {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: -1;
  width: min(240px, 47vw);
  aspect-ratio: 1;
  background: url("assets/logo.png") center / contain no-repeat;
  content: "";
  filter: blur(0.8px);
  opacity: 0.11;
  transform: translate(-50%, -50%);
}

.footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer__brand {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: 1.15rem;
}

.footer__contact {
  margin-top: 22px;
  font-style: normal;
}

.footer__right {
  display: grid;
  justify-items: end;
  text-align: right;
}

.footer a {
  transition: color 180ms ease;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--color-text);
}

.footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__legal {
  position: relative;
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .cards,
  .progress {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .progress::before {
    display: none;
  }

  .section__grid,
  .material,
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 92px;
  }

  .container {
    width: min(100% - 28px, var(--container));
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    padding-block: 12px;
  }

  .brand__logo {
    height: 54px;
  }

  .brand__text {
    font-size: 1.2rem;
  }

  .nav__links {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.78rem;
  }

  .hero {
    min-height: calc(100svh - var(--header-height));
    background-position: center top;
    background-size: auto 88%;
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(0, 0, 0, 0.48), rgba(0, 0, 0, 0.66)),
      repeating-linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.035) 0,
        rgba(255, 255, 255, 0.035) 1px,
        transparent 1px,
        transparent 18px
      );
  }

  .hero__overlay {
    background: radial-gradient(circle at center, rgba(17, 17, 17, 0.04), rgba(5, 5, 5, 0.68));
  }

  .section {
    background:
      linear-gradient(rgba(17, 17, 17, 0.9), rgba(17, 17, 17, 0.9)),
      url("assets/background-comic.png");
    background-position: center;
    background-size: auto 88%;
  }

  .section--intro {
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 42%),
      linear-gradient(rgba(10, 10, 10, 0.92), rgba(10, 10, 10, 0.92)),
      url("assets/background-comic.png");
    background-position: center top;
    background-size: auto 88%;
  }

  .section--material {
    background:
      linear-gradient(rgba(23, 23, 23, 0.88), rgba(23, 23, 23, 0.88)),
      url("assets/background-comic.png");
    background-position: center 45%;
    background-size: auto 88%;
  }

  .hero h1 {
    font-size: clamp(2.25rem, 14vw, 3.9rem);
  }

  .hero__actions,
  .button {
    width: 100%;
  }

  .cards,
  .progress {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 128px;
  }

  .progress__item {
    justify-items: start;
    grid-template-columns: 46px 1fr;
    min-height: auto;
    padding: 0;
    text-align: left;
  }

  .footer__social {
    gap: 12px 18px;
  }

  .footer::before {
    top: 55%;
    width: min(188px, 51vw);
    opacity: 0.1;
  }
}