:root {
  --blue-900: #082f7a;
  --blue-800: #0a46b7;
  --blue-700: #1c63d9;
  --blue-100: #e8f1ff;
  --blue-050: #f5f9ff;
  --line: #cbdcff;
  --text: #173564;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: "PT Sans", sans-serif;
  color: var(--text);
  background:
    linear-gradient(rgba(10, 70, 183, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 70, 183, 0.03) 1px, transparent 1px),
    radial-gradient(circle, rgba(28, 99, 217, 0.07) 0 26%, rgba(28, 99, 217, 0.025) 26% 31%, rgba(255, 255, 255, 0) 31%),
    radial-gradient(circle, rgba(10, 70, 183, 0.055) 0 28%, rgba(10, 70, 183, 0.018) 28% 33%, rgba(255, 255, 255, 0) 33%),
    radial-gradient(circle, rgba(108, 160, 255, 0.16) 0, rgba(108, 160, 255, 0.1) 18%, rgba(108, 160, 255, 0) 58%),
    radial-gradient(circle, rgba(10, 70, 183, 0.11) 0, rgba(10, 70, 183, 0.06) 16%, rgba(10, 70, 183, 0) 54%),
    radial-gradient(circle, rgba(141, 191, 255, 0.15) 0, rgba(141, 191, 255, 0.08) 20%, rgba(141, 191, 255, 0) 56%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(237, 244, 255, 0.98) 48%, rgba(226, 238, 255, 1));
  background-repeat:
    repeat,
    repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat,
    no-repeat;
  background-position:
    0 0,
    0 0,
    76% 72%,
    24% 38%,
    8% 12%,
    92% 24%,
    18% 78%,
    0 0;
  background-size:
    48px 48px,
    48px 48px,
    260px 260px,
    320px 320px,
    680px 680px,
    580px 580px,
    620px 620px,
    auto;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 28px;
  color: #fff;
  background: linear-gradient(125deg, var(--blue-900), var(--blue-800) 55%, var(--blue-700));
}

.hero-glow {
  position: absolute;
  border-radius: 999px;
  opacity: 0.24;
  filter: blur(6px);
}

.hero-glow-1 {
  width: 260px;
  height: 260px;
  top: -70px;
  right: -30px;
  background: #c9dcff;
}

.hero-glow-2 {
  width: 300px;
  height: 300px;
  bottom: -110px;
  left: -50px;
  background: #8eb7ff;
}

.hero-headline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: center;
  margin-bottom: 18px;
}

.hero-copy {
  min-width: 0;
}

.hero-logo-frame {
  position: relative;
  justify-self: end;
  width: min(100%, 290px);
  padding: 14px;
}

.hero-logo-orbit {
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 24px;
  transform: rotate(-5deg);
}

.hero-logo {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 18px;
  border: 2px solid rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 34px rgba(4, 26, 71, 0.35);
  transform: rotate(3deg);
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
  margin-top: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.top-nav a {
  color: #f2f7ff;
  text-decoration: none;
  padding: 4px 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, opacity 0.2s ease;
}

.top-nav a:hover {
  opacity: 0.92;
  border-color: rgba(255, 255, 255, 0.7);
}

h1 {
  margin: 0;
  font-family: "Russo One", sans-serif;
  font-size: clamp(1.85rem, 4vw, 3rem);
  line-height: 1.12;
}

.lead {
  margin: 12px 0 0;
  max-width: 680px;
  font-size: 1.08rem;
  color: #eaf3ff;
}

.content-layout {
  position: relative;
  max-width: 760px;
  padding: 28px 0 42px;
}

.section-block {
  padding: 0 0 10px;
  margin-bottom: 24px;
  scroll-margin-top: 20px;
}


h2 {
  margin: 0 0 18px;
  font-family: "Russo One", sans-serif;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  text-align: center;
  letter-spacing: 0.03em;
  color: var(--blue-900);
}

p {
  margin: 0 0 10px;
  line-height: 1.48;
}

ul {
  margin: 0;
  padding-left: 18px;
}

li {
  margin-bottom: 8px;
}

.link-btn {
  display: table;
  border: 0;
  border-radius: 11px;
  padding: 10px 14px;
  min-width: 280px;
  text-decoration: none;
  font-weight: 700;
  background: var(--blue-800);
  color: #fff;
  cursor: pointer;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.link-btn-large {
  margin-top: 8px;
  padding: 14px 22px;
  font-size: 1.02rem;
  box-shadow: 0 12px 24px rgba(10, 70, 183, 0.18);
}

.section-note {
  margin-top: 10px;
  color: #4c6697;
}

.form-grid {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
}

input,
textarea {
  width: 100%;
  border: 1px solid #bcd2fb;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

.info {
  font-weight: 700;
  color: var(--blue-800);
}

.contacts {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.contacts a {
  color: var(--blue-800);
}

.timeline {
  display: grid;
  gap: 10px;
}

.timeline-item {
  border-left: 4px solid #8cb3ff;
  padding: 8px 10px;
}

.timeline-title {
  margin: 0 0 4px;
  font-weight: 700;
  color: var(--blue-800);
}

@media (max-width: 980px) {
  .hero-headline {
    grid-template-columns: 1fr;
  }

  .hero-logo-frame {
    justify-self: start;
    width: min(100%, 340px);
  }

  .content-layout {
    display: block;
    max-width: 760px;
  }

  .info-visual {
    position: static;
    width: auto;
    opacity: 0.52;
    margin: 8px 0 28px;
    pointer-events: auto;
  }
}

@media (max-width: 580px) {
  .top-nav a,
  .link-btn {
    width: 100%;
    text-align: center;
  }

  .hero {
    padding-bottom: 20px;
  }

  .top-nav {
    border-radius: 14px;
    padding: 10px;
  }
}

.organizers-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.organizers-logos img {
  height: 70px;
  object-fit: contain;
  opacity: 0.7;
  transition: opacity 0.25s ease;
}

.organizers-logos img:hover {
  opacity: 1;
}