frontend-start/css/styles.css

:root {
  --hero-bg-1: #070b28;
  --hero-bg-2: #120a32;
  --hero-bg-3: #1e0f3d;
  --hero-accent: #c9b8ff;
  --hero-text: #f4f2ff;
  --cream: #f4efe6;
  --blue-deep: #0c1240;
  --blue-panel: #101a5c;
  --footer-bg: #05052d;
  --footer-line: rgba(255, 255, 255, 0.18);
  --page-max: 120rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Manrope', system-ui, sans-serif;
  font-size: 18px;
  color: #1a1a2e;
  background: radial-gradient(ellipse 120% 90% at 35% 10%, rgba(80, 70, 170, 0.25) 0%, transparent 55%),
    radial-gradient(ellipse 120% 90% at 60% 55%, rgba(140, 120, 255, 0.14) 0%, transparent 62%),
    linear-gradient(180deg, var(--hero-bg-1) 0%, var(--hero-bg-2) 32%, var(--hero-bg-3) 62%, var(--footer-bg) 100%);
}

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

.page {
  width: min(100%, var(--page-max));
  margin: 0 auto;
  background: transparent;
  min-height: 100vh;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.35);
}

.header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, var(--page-max));
  z-index: 50;
  padding: 2.25rem 4vw 0;
  background: linear-gradient(180deg, rgba(7, 11, 40, 0.95) 0%, rgba(7, 11, 40, 0.65) 70%, transparent 100%);
}

.header__inner {
  max-width: 120rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1.35rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
  color: var(--hero-text);
}

.logo__img {
  display: block;
  height: auto;
  max-width: 100%;
}

.logo--header .logo__img {
  height: clamp(1.65rem, 3.8vw, 2.25rem);
  width: auto;
}

.logo--hero {
  margin: 0 0 2rem;
  max-width: min(100%, 34rem);
}

.logo--hero .logo__img {
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 2.4vw, 3.1rem);
}

.nav__link {
  font-size: clamp(0.95rem, 1.35vw, 1.15rem);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.nav__link:hover {
  color: #fff;
}

.btn--cabinet {
  flex-shrink: 0;
  padding: 0.95rem 1.9rem;
  border-radius: 999px;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #0c0c24;
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--cabinet:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.burger {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 0.5rem;
  background: transparent;
  position: relative;
  cursor: pointer;
}

.burger::before,
.burger::after {
  content: '';
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 2px;
  background: #fff;
  border-radius: 1px;
}

.burger::before {
  top: 0.85rem;
}

.burger::after {
  bottom: 0.85rem;
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 7.5rem 4vw 4rem;
  overflow: hidden;
  color: var(--hero-text);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 80% at 20% 20%, #2a1b6e 0%, transparent 55%),
    radial-gradient(ellipse 90% 70% at 85% 30%, #3d1f7a 0%, transparent 50%),
    linear-gradient(165deg, var(--hero-bg-1) 0%, var(--hero-bg-2) 42%, var(--hero-bg-3) 100%);
  pointer-events: none;
  z-index: 0;
}

.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 90% at 55% 60%, rgba(255, 255, 255, 0.05) 0%, transparent 58%),
    radial-gradient(ellipse 80% 70% at 20% 55%, rgba(120, 90, 220, 0.16) 0%, transparent 62%);
  opacity: 0.9;
}

.hero__glow {
  position: absolute;
  z-index: 1;
  width: clamp(80px, 14vw, 144px);
  height: clamp(80px, 14vw, 144px);
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1.1rem;
  transform: rotate(-8deg);
  box-shadow: 0 0 26px rgba(140, 120, 255, 0.12);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.03);
}

.hero__glow-img {
  width: 62%;
  height: auto;
  opacity: 0.5;
  filter: grayscale(1) brightness(1.08) contrast(1.08) drop-shadow(0 12px 22px rgba(0, 0, 0, 0.22));
}

.hero__glow-img[src$='logo-ethereum.png'] {
  filter: grayscale(1) brightness(1.50) contrast(1.00) drop-shadow(0 12px 22px rgba(0, 0, 0, 0.22));
}

.hero__glow--1 {
  top: 22%;
  left: 8%;
}

.hero__glow--2 {
  top: 38%;
  left: 18%;
  transform: rotate(6deg);
}

.hero__glow--3 {
  top: 18%;
  left: 28%;
  transform: rotate(12deg);
}

.hero__glow--4 {
  top: 58%;
  left: 6%;
  transform: rotate(-14deg);
}

.hero__glow--5 {
  top: 64%;
  left: 20%;
  transform: rotate(10deg);
}

.hero__glow--6 {
  top: 12%;
  left: 42%;
  transform: rotate(-6deg);
}

.hero__glow--7 {
  top: 36%;
  left: 36%;
  transform: rotate(16deg);
}

.hero__grid {
  position: relative;
  z-index: 2;
  max-width: 120rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}

.hero__left {
  align-self: center;
  padding-top: 2rem;
}

.hero__acronym {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: clamp(0.75rem, 1.25vw, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

.hero__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 2rem;
}

.hero__bridge-wrap {
  width: 100%;
}

.hero__bridge {
  margin: 0;
  font-size: clamp(2.4rem, 5.6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.05;
}

.hero__bridge--reflect {
  margin-top: -0.15em;
  opacity: 0.22;
  transform: scaleY(-1);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 55%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 55%);
  filter: blur(0.5px);
}

.hero__taglines {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
}

.hero__tag {
  margin: 0;
  font-size: clamp(3.1rem, 8.6vw, 7.4rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: lowercase;
  color: rgba(180, 150, 255, 0.42);
  text-shadow: 0 0 60px rgba(120, 90, 220, 0.35);
}

.hero__tag--2 {
  padding-right: clamp(0rem, 4vw, 3rem);
}

.hero__tag--3 {
  padding-right: clamp(0rem, 8vw, 6rem);
}

.countdown {
  width: 100%;
  max-width: 38rem;
  margin-top: 0.5rem;
}

.countdown__title {
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.countdown__units {
  --countdown-gap: clamp(1rem, 2.2vw, 1.75rem);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: end;
  justify-items: center;
  column-gap: var(--countdown-gap);
  row-gap: 0.75rem;
}

.countdown__unit {
  min-width: 0;
  text-align: center;
  position: relative;
  padding-inline: clamp(0.65rem, 1.2vw, 0.9rem);
}

.countdown__value {
  display: block;
  font-size: clamp(4.2rem, 9.6vw, 7.1rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  letter-spacing: 0.02em;
  color: #fff;
  text-shadow: 0 0 40px rgba(180, 160, 255, 0.45);
}

.countdown__label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.countdown__sep {
  display: none;
}

@media (max-width: 620px) {
  .countdown__units {
    --countdown-gap: 0.9rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    justify-items: center;
    column-gap: var(--countdown-gap);
    row-gap: 0.9rem;
  }

  .countdown__unit {
    width: 100%;
    padding-inline: 0.75rem;
  }

}

.countdown__done {
  margin: 0.5rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
}

.about {
  position: relative;
  padding: clamp(4rem, 10vw, 7rem) 4vw;
  background: transparent;
  overflow: hidden;
}

.about__slant {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 60% at 35% 25%, rgba(255, 255, 255, 0.06) 0%, transparent 62%);
  opacity: 1;
}

.about__slant::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 40, 0.2) 0%, transparent 40%, rgba(7, 11, 40, 0.25) 100%);
  pointer-events: none;
}

.about__inner {
  position: relative;
  z-index: 2;
  max-width: 78rem;
  margin: 0 auto;
  padding: clamp(2.2rem, 4.5vw, 4rem) clamp(1.6rem, 4vw, 3.4rem);
}

.about__panel {
  max-width: 44rem;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  border-radius: 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.about__title {
  margin: 0 0 1.25rem;
  font-size: clamp(2.2rem, 4.2vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
}

.about__text {
  margin: 0 0 1rem;
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 400;
  line-height: 1.65;
  color: rgba(244, 242, 255, 0.86);
}

.about__legal {
  position: relative;
  z-index: 3;
  max-width: 78rem;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) auto 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about__legal p {
  margin: 0;
  font-size: clamp(0.85rem, 1.15vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.72);
  padding: 0.9rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
}

.footer {
  padding: 3.5rem 4vw 2.5rem;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  font-family: 'Nunito Sans', 'Manrope', system-ui, sans-serif;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

.footer__top {
  max-width: 72rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem 3rem;
}

.footer__company {
  margin: 0 0 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 1.1rem;
}

.footer__col p {
  margin: 0.2rem 0;
}

.footer__heading {
  margin: 0 0 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.footer__links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__links a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer__links li + li {
  margin-top: 0.35rem;
}

.footer__col--contact {
  font-size: 1rem;
}

.footer__phone {
  font-size: 1.15rem;
  font-weight: 600;
}

.footer__rule {
  border: none;
  border-top: 1px solid var(--footer-line);
  margin: 1rem 0;
}

.footer__mail {
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.footer__wide {
  border: none;
  border-top: 1px solid var(--footer-line);
  margin: 2.5rem auto 1.75rem;
  max-width: 72rem;
}

.footer__social {
  max-width: 72rem;
  margin: 0 auto 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer__icons {
  display: flex;
  gap: 0.75rem;
}

.footer__icon {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.footer__bottom {
  max-width: 72rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.95rem;
  opacity: 0.85;
}

.cabinet {
  position: relative;
  min-height: 100vh;
  padding: 0 4vw;
  color: rgba(255, 255, 255, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cabinet__back {
  position: absolute;
  top: clamp(6.75rem, 14vw, 8.75rem);
  left: 4vw;
  z-index: 2;
  width: fit-content;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.cabinet__center {
  width: min(42rem, 100%);
  margin: 0 auto;
}

.cabinet__card {
  width: 100%;
  border-radius: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(10, 10, 40, 0.72);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.5);
  padding: 2rem 2rem 1.75rem;
}

.cabinet__title {
  margin: 0 0 1.25rem;
  font-size: 2rem;
  letter-spacing: 0.02em;
}

.cabinet__form {
  display: grid;
  gap: 1rem;
}

.cabinet__field {
  display: grid;
  gap: 0.45rem;
}

.cabinet__label {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.cabinet__input {
  width: 100%;
  padding: 0.95rem 1.05rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  outline: none;
  font: inherit;
}

.cabinet__input:focus {
  border-color: rgba(201, 184, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(201, 184, 255, 0.16);
}

.cabinet__submit {
  margin-top: 0.35rem;
  padding: 0.95rem 1.25rem;
  border-radius: 1.05rem;
  border: 0;
  background: #fff;
  color: #0c0c24;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cabinet__submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

@media (max-width: 600px) {
  .hero__glow {
    display: none;
  }
}

@media (max-width: 960px) {
  .hero__grid {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .hero__right {
    align-items: flex-start;
    text-align: left;
  }

  .hero__taglines {
    align-items: flex-start;
  }

  .hero__tag {
    align-self: flex-start;
  }

  .hero__tag--2,
  .hero__tag--3 {
    padding-right: 0;
  }

  .countdown__units {
    justify-content: flex-start;
  }

  .footer__top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 4.5rem;
    padding: 1rem 4vw 1.25rem;
    flex-direction: column;
    background: rgba(7, 11, 40, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  body.nav-open .nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .burger {
    display: block;
  }

  .btn--cabinet {
    margin-left: auto;
  }

  .header__inner {
    flex-wrap: wrap;
  }

  .logo--header {
    order: 0;
  }

  .burger {
    order: 1;
  }

  .btn--cabinet {
    order: 2;
  }

  .nav {
    order: 3;
    width: 100%;
  }
}