body {
  min-height: 100vh;
  background: #ffffff;
}

.page-frame {
  width: min(1820px, calc(100vw - 48px));
  margin: 0 auto;
  min-height: 100vh;
  padding: 12px 10px 20px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  flex-shrink: 0;
}

.header-logo {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #202020;
}

.header-nav {
  display: flex;
  align-items: center;
}

.volume-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: #ffffff;
  color: #676767;
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s;
}

.volume-icon:hover {
  color: #1f1f1f;
  border-color: rgba(0, 0, 0, 0.16);
  background: #ffffff;
}

.volume-icon.muted svg path:last-child,
.volume-icon.muted svg path:nth-child(2) {
  display: none;
}

.hero {
  text-align: center;
  padding: 2px 18px 10px;
  flex-shrink: 0;
}

.hero h1 {
  max-width: 1380px;
  margin: 0 auto 8px;
  color: #171717;
  font-size: clamp(34px, 4.6vw, 84px);
  font-weight: 700;
  line-height: 0.93;
  letter-spacing: -0.075em;
}

.hero .subtitle {
  max-width: 760px;
  margin: 0 auto;
  color: #949494;
  font-size: clamp(14px, 1.2vw, 18px);
  line-height: 1.4;
}

.board-section {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2px 0 0;
}

:fullscreen .page-frame {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  padding: 24px;
  border-radius: 0;
  box-shadow: none;
  background: #0f0f10;
}

:fullscreen .hero,
:fullscreen .header {
  display: none !important;
}

:fullscreen .board-section {
  padding: 0;
}