.page {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px 96px;
}
:root {
  --bg: #0b1018;
  --panel: #121b27;
  --panel-soft: rgba(22, 33, 47, 0.88);
  --text: #f3f6fb;
  --muted: #9aa7bd;
  --accent: #4bc0ff;
  --accent-strong: #1f9dff;
  --shadow: 0 26px 56px rgba(3, 9, 20, 0.55);
  --radius-xl: 36px;
  --radius-lg: 22px;
  --transition: all 0.3s ease;
  --max-width: 1080px;
  --divider: rgba(85, 125, 165, 0.18);
}

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

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at top, rgba(36, 54, 84, 0.45), transparent 55%), var(--bg);
  color: var(--text);
  line-height: 1.7;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

a {
  color: inherit;
}

header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(16px);
  background: rgba(11, 16, 24, 0.92);
  border-bottom: 1px solid var(--divider);
  width: 100%;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 20px 0;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.logo:hover,
.logo:focus {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: rgba(79, 192, 255, 0.18);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  align-items: center;
  gap: 10px;
}

.menu-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(79, 192, 255, 0.28);
}

.burger {
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transition: background 0.2s ease;
}

.burger::before,
.burger::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transition: transform 0.2s ease;
}

.burger::before {
  top: -6px;
}

.burger::after {
  top: 6px;
}

.menu-label {
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

nav {
  position: relative;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-list a {
  text-decoration: none;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.02em;
  position: relative;
  transition: color 0.2s ease;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--accent);
}

.menu-close {
  display: none;
}

.menu-close-button {
  background: transparent;
  border: 1px solid rgba(79, 192, 255, 0.4);
  color: var(--accent);
  font-weight: 600;
  border-radius: 14px;
  padding: 10px 18px;
  cursor: pointer;
  transition: var(--transition);
}

.menu-close-button:hover,
.menu-close-button:focus {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(79, 192, 255, 0.28);
}
.nav-list a:hover::after,
.nav-list a:focus::after {
  transform: scaleX(1);
  transform-origin: left;
}

body.nav-open {
  overflow: hidden;
}

body.nav-open::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(5, 10, 18, 0.72);
  z-index: 40;
}

body.doc-open {
  overflow: hidden;
}

body.doc-open::after {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(5, 10, 18, 0.72);
  z-index: 65;
}

main {
  display: flex;
  flex-direction: column;
  gap: 96px;
  padding-top: 56px;
}

section {
  background: linear-gradient(160deg, rgba(30, 45, 65, 0.72), rgba(18, 27, 39, 0.92));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: 72px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

section::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(79, 192, 255, 0.18), transparent 55%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

section:hover::after {
  opacity: 1;
}

section h1,
section h2 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 2.9rem);
  letter-spacing: 0.04em;
}

section p {
  margin: 0 auto;
  max-width: 760px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-visual {
  margin-top: 36px;
  width: 100%;
  max-width: 520px;
  border-radius: 28px;
  box-shadow: 0 28px 52px rgba(5, 15, 28, 0.4);
  border: 1px solid rgba(79, 192, 255, 0.18);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.card {
  background: var(--panel-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 22px;
  transition: var(--transition);
  border: 1px solid rgba(79, 192, 255, 0.16);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 54px rgba(5, 15, 28, 0.42);
}

.card img {
  width: 100%;
  border-radius: 18px;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  box-shadow: 0 24px 48px rgba(5, 15, 28, 0.38);
}

.card h3 {
  margin: 0;
  font-size: 1.35rem;
}

.game-panel {
  margin-top: 48px;
  display: grid;
  gap: 28px;
}

.game-inputs {
  display: grid;
  gap: 20px;
}

.slider-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

.slider-row label {
  font-weight: 600;
  letter-spacing: 0.02em;
}

input[type="range"] {
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: rgba(79, 192, 255, 0.22);
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(79, 192, 255, 0.12);
  cursor: pointer;
  transition: transform 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.12);
}

.game-result {
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--accent);
  padding: 20px;
  border-radius: 18px;
  background: rgba(79, 192, 255, 0.12);
  border: 1px solid rgba(79, 192, 255, 0.22);
}

.accordion {
  margin-top: 48px;
  display: grid;
  gap: 18px;
  text-align: left;
}

details {
  background: rgba(18, 27, 39, 0.82);
  border-radius: 18px;
  padding: 22px 26px;
  border: 1px solid rgba(79, 192, 255, 0.14);
  transition: var(--transition);
}

details[open] {
  background: rgba(29, 41, 57, 0.9);
}

summary {
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
}

details p {
  margin-top: 14px;
  color: var(--muted);
}

footer {
  margin-top: 96px;
  padding: 48px 0 64px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--divider);
}

.footer-meta {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.footer-links {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links button {
  background: transparent;
  border: 1px solid rgba(79, 192, 255, 0.24);
  color: var(--accent);
  font-weight: 600;
  border-radius: 999px;
  padding: 10px 20px;
  cursor: pointer;
  transition: var(--transition);
}

.footer-links button:hover,
.footer-links button:focus {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(79, 192, 255, 0.24);
}

.map-wrapper {
  margin-top: 36px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid rgba(79, 192, 255, 0.18);
}

form {
  margin-top: 36px;
  display: grid;
  gap: 20px;
}

label {
  font-weight: 600;
  text-align: left;
  color: var(--muted);
  letter-spacing: 0.02em;
}

input,
textarea {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid rgba(79, 192, 255, 0.22);
  font: inherit;
  background: rgba(12, 18, 27, 0.6);
  color: var(--text);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(79, 192, 255, 0.12);
}

button.primary {
  padding: 16px 28px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent));
  color: #01060f;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.05em;
}

button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(79, 192, 255, 0.32);
}

.text-blocks {
  display: grid;
  gap: 26px;
  margin-top: 40px;
  text-align: left;
}

.text-blocks h3 {
  margin-bottom: 12px;
}

.dense-text {
  margin-top: 40px;
  display: grid;
  gap: 18px;
  text-align: left;
}

@media (max-width: 820px) {
  .page {
    padding: 0 16px 72px;
  }

  main {
    gap: 72px;
  }

  section {
    padding: 54px 28px;
  }

  .nav {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-list {
    position: fixed;
    top: 70%;
    left: 50%;
    flex-direction: column;
    gap: 20px;
    background: rgba(11, 17, 27, 0.96);
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transform: translate(-50%, calc(-50% - 32px));
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 50;
    width: min(90vw, 420px);
    max-height: calc(100vh - 120px);
    margin: 0;
    overflow-y: auto;
  }

  .nav-list.open {
    transform: translate(-50%, calc(-50% + 28px));
    opacity: 1;
    pointer-events: auto;
  }

  .menu-close {
    display: flex;
    justify-content: flex-end;
    width: 100%;
  }

  .nav-list a {
    width: 100%;
    text-align: center;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(8, 13, 22, 0.9);
    box-shadow: 0 16px 36px rgba(2, 8, 18, 0.45);
  }

  .nav-list a::after {
    display: none;
  }
}

@media (max-width: 520px) {
  section {
    padding: 42px 24px;
  }

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

.doc-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: rgba(5, 10, 18, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 70;
}

.doc-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.doc-modal-content {
  max-width: 520px;
  width: 100%;
  background: rgba(16, 25, 38, 0.96);
  border-radius: 26px;
  padding: 36px;
  box-shadow: 0 32px 60px rgba(2, 8, 18, 0.55);
  text-align: left;
  border: 1px solid rgba(79, 192, 255, 0.22);
}

.doc-modal-content h3 {
  margin-top: 0;
  margin-bottom: 14px;
}

.doc-modal-content p + p {
  margin-top: 14px;
}

.doc-modal-close {
  margin-top: 24px;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent));
  color: #01060f;
  font-weight: 600;
  border: none;
  border-radius: 999px;
  padding: 12px 24px;
  cursor: pointer;
  transition: var(--transition);
}

.doc-modal-close:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(79, 192, 255, 0.3);
}