/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 0 0, rgba(255, 212, 59, 0.08), transparent 55%),
    radial-gradient(circle at 100% 0, rgba(55, 165, 255, 0.16), transparent 60%),
    #050814;
  color: #f7f8ff;
  line-height: 1.6;
}

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

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

:root {
  --bt-yellow: #ffd43b;
  --bt-yellow-soft: #ffeb99;
  --bt-blue: #18223e;
  --bt-surface: #090f23;
  --bt-surface-soft: #10172b;
  --bt-border-subtle: rgba(255, 255, 255, 0.1);
  --bt-text-main: #f7f8ff;
  --bt-text-muted: #9ea4c7;
  --bt-radius: 18px;
  --bt-shadow: 0 18px 55px rgba(0, 0, 0, 0.85);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(
    to bottom,
    rgba(5, 8, 20, 0.96),
    rgba(5, 8, 20, 0.85),
    transparent
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.7rem 1.5rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.25rem;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  width: auto;
}

.main-nav {
  display: flex;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  list-style: none;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-menu a {
  position: relative;
  color: var(--bt-text-muted);
  transition: color 0.16s ease-out;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--bt-yellow), var(--bt-yellow-soft));
  border-radius: 999px;
  transition: width 0.16s ease-out;
}

.nav-menu a:hover {
  color: var(--bt-text-main);
}

.nav-menu a:hover::after {
  width: 100%;
}

.separator {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.16);
}

.tv-link {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(10, 14, 36, 0.9);
  transition: all 0.16s ease-out;
}

.tv-link:hover {
  border-color: var(--bt-yellow);
  background: rgba(255, 212, 59, 0.1);
}

.tv-link svg {
  flex-shrink: 0;
}

.header-buttons {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.btn-login,
.btn-signup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.3rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.16s ease-out;
  white-space: nowrap;
}

.btn-login {
  border: 1px solid rgba(255, 255, 255, 0.32);
  background: transparent;
  color: var(--bt-text-main);
}

.btn-login:hover {
  background: rgba(255, 255, 255, 0.04);
}

.btn-signup {
  background: linear-gradient(135deg, var(--bt-yellow), #ffbf00);
  color: #111624;
  box-shadow: 0 12px 28px rgba(255, 212, 59, 0.4);
  border: none;
}

.btn-signup:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(255, 212, 59, 0.6);
}

.burger-menu {
  width: 36px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(9, 13, 32, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.burger-menu span {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: #ffffff;
  transition: transform 0.16s ease-out, opacity 0.16s ease-out;
}

.burger-menu.active span:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.burger-menu.active span:nth-child(2) {
  opacity: 0;
}

.burger-menu.active span:nth-child(3) {
  transform: translateY(-3px) rotate(-45deg);
}

.mobile-header-buttons {
  display: none;
  align-items: center;
  gap: 0.55rem;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #050814;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 30;
  max-height: calc(100vh - 100%);
  overflow-y: auto;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu-list {
  list-style: none;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.mobile-menu-list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-menu-list li:last-child {
  border-bottom: none;
}

.mobile-menu-list a {
  color: var(--bt-text-main);
  transition: color 0.16s ease-out;
  display: block;
  padding: 1rem 0;
  font-weight: 500;
}

.mobile-menu-list a:hover {
  color: var(--bt-yellow-soft);
}

/* Main */
.main-content {
  max-width: 960px;
  margin: 1.8rem auto 2.6rem;
  padding: 0 1.5rem;
}

.content-block {
  background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.06), transparent 55%),
    var(--bt-surface);
  border-radius: var(--bt-radius);
  padding: 1.4rem 1.5rem 1.6rem;
  border: 1px solid var(--bt-border-subtle);
  box-shadow: var(--bt-shadow);
}

.article-header {
  margin-bottom: 1.1rem;
}

.article-header h1 {
  font-size: clamp(1.7rem, 2.5vw, 2.1rem);
  letter-spacing: 0.02em;
  font-weight: 700;
}

.article-intro {
  margin-bottom: 1.3rem;
}

.article-intro p {
  font-size: 0.96rem;
  color: var(--bt-text-muted);
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.6rem;
}

.feature-card {
  border-radius: 16px;
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--bt-border-subtle);
  background: var(--bt-surface-soft);
}

.feature-primary {
  background: linear-gradient(135deg, rgba(255, 212, 59, 0.09), #090f23);
}

.feature-secondary {
  background: linear-gradient(135deg, rgba(92, 140, 255, 0.12), #090f23);
}

.feature-accent {
  background: linear-gradient(135deg, rgba(51, 214, 159, 0.12), #090f23);
}

.feature-icon {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.feature-card h3 {
  font-size: 0.98rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.82rem;
  color: var(--bt-text-muted);
  line-height: 1.6;
}

.content-section {
  margin-bottom: 1.6rem;
}

.content-section h2 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.benefits-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.benefit-item {
  display: flex;
  gap: 0.6rem;
  background: #070c1b;
  border-radius: 14px;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--bt-border-subtle);
}

.benefit-number {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 0, var(--bt-yellow-soft), var(--bt-yellow));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: #111624;
  flex-shrink: 0;
}

.benefit-content h4 {
  font-size: 0.92rem;
  margin-bottom: 0.15rem;
  font-weight: 600;
}

.benefit-content p {
  font-size: 0.8rem;
  color: var(--bt-text-muted);
  line-height: 1.6;
}

.highlight-box {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 212, 59, 0.16), #0a1128);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--bt-shadow);
  margin-bottom: 1.6rem;
}

.highlight-icon {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: rgba(5, 10, 30, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--bt-yellow-soft);
  flex-shrink: 0;
}

.highlight-content h3 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.highlight-content p {
  font-size: 0.84rem;
  color: var(--bt-text-muted);
  line-height: 1.6;
}

.game-categories {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.game-categories li {
  font-size: 0.82rem;
  color: var(--bt-text-muted);
  line-height: 1.6;
}

.game-categories li a {
  text-decoration: none;
  transition: opacity 0.16s ease-out;
}

.game-categories li a:hover {
  opacity: 0.8;
}

.category-badge {
  display: inline-flex;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(7, 12, 32, 0.95);
  font-size: 0.76rem;
  margin-right: 0.4rem;
  color: var(--bt-text-main);
  transition: all 0.16s ease-out;
}

.game-categories li a:hover .category-badge {
  border-color: var(--bt-yellow);
  background: rgba(255, 212, 59, 0.1);
  color: var(--bt-yellow-soft);
}

.cta-section {
  margin-top: 0.2rem;
}

.cta-content {
  border-radius: 16px;
  padding: 0.9rem 1rem;
  background: radial-gradient(circle at 0 0, rgba(255, 212, 59, 0.18), transparent 60%),
    #070c1b;
  border: 1px solid var(--bt-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.cta-content h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.cta-content p {
  font-size: 0.84rem;
  color: var(--bt-text-muted);
  line-height: 1.6;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--bt-yellow), #ffbf00);
  color: #111624;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 12px 28px rgba(255, 212, 59, 0.4);
  transition: all 0.16s ease-out;
  align-self: flex-start;
}

.cta-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(255, 212, 59, 0.6);
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: radial-gradient(circle at 100% 0, rgba(255, 212, 59, 0.2), transparent 60%),
    #040713;
  padding: 1.5rem 0 1.8rem;
  font-size: 0.78rem;
  color: var(--bt-text-muted);
}

.footer-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-content {
  border-radius: 16px;
  padding: 1rem 1.1rem 1rem;
  background: rgba(5, 9, 30, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 0.9rem;
}

.footer-column h3 {
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--bt-text-main);
}

.footer-column ul {
  list-style: none;
}

.footer-column li + li {
  margin-top: 0.18rem;
}

.footer-column a {
  color: var(--bt-text-muted);
  transition: color 0.16s ease-out;
}

.footer-column a:hover {
  color: var(--bt-yellow-soft);
}

.footer-legal {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-legal p {
  margin-bottom: 0.4rem;
  line-height: 1.6;
}

.footer-legal a {
  color: var(--bt-yellow-soft);
  transition: color 0.16s ease-out;
}

.footer-legal a:hover {
  color: var(--bt-yellow);
}

.support-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.support-links li {
  margin: 0;
}

.support-links a {
  color: var(--bt-text-muted);
  text-decoration: underline;
  transition: color 0.16s ease-out;
}

.support-links a:hover {
  color: var(--bt-yellow-soft);
}

.copyright-bar {
  margin-top: 0.7rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.copyright-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.7rem 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.copyright-domain {
  color: var(--bt-yellow-soft);
  transition: color 0.16s ease-out;
}

.copyright-domain:hover {
  color: var(--bt-yellow);
}

.copyright-separator {
  margin: 0 0.2rem;
}

.copyright-text {
  color: var(--bt-text-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .main-nav {
    display: none;
  }

  .burger-menu {
    display: flex;
  }

  .header-container {
    grid-template-columns: auto 1fr auto;
  }

  .features-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .benefits-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .header-container {
    padding-inline: 1.1rem;
    grid-template-columns: auto 1fr auto;
    gap: 0.8rem;
  }

  .logo {
    justify-self: flex-start;
  }

  .main-content {
    padding-inline: 1.1rem;
  }

  .content-block {
    padding-inline: 1.1rem;
  }

  .header-buttons {
    display: none;
  }

  .mobile-header-buttons {
    display: flex;
    grid-column: 3;
  }

  .mobile-header-buttons .btn-login,
  .mobile-header-buttons .btn-signup {
    padding: 0.5rem 0.9rem;
    font-size: 0.75rem;
  }

  .highlight-box {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-columns {
    grid-template-columns: minmax(0, 1fr);
  }
}