/* Page Frame — full viewport board display */
.page-frame {
  margin: 0;
  background: #111;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 36px;
  height: 60px;
  flex-shrink: 0;
}

.header-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  color: #666;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: #000;
}

.volume-icon {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.5);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  padding: 0;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.volume-icon:hover {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.8);
}

.volume-icon.muted {
  color: rgba(255, 255, 255, 0.25);
}

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

/* Hero */
.hero {
  text-align: center;
  padding: 56px 24px 44px;
  flex-shrink: 0;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  max-width: 650px;
  margin: 0 auto 14px;
  color: #111;
}

.hero .subtitle {
  font-size: 16px;
  color: #888;
  margin-bottom: 28px;
  font-weight: 400;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.hero-cta input {
  padding: 12px 18px;
  border: 1.5px solid #E0E0E0;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  width: 220px;
}

.hero-cta input::placeholder {
  color: #bbb;
}

.hero-cta input:focus {
  border-color: #999;
}

.hero-cta button {
  padding: 12px 22px;
  background: #000;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  white-space: nowrap;
  transition: background 0.2s;
}

.hero-cta button:hover {
  background: #222;
}

/* Board Section */
.board-section {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
}

/* Fullscreen: hide header+hero, board fills viewport */
.fullscreen-active .header,
.fullscreen-active .hero {
  display: none;
}

.fullscreen-active .board-section {
  padding: 0;
  height: 100vh;
  align-items: center;
}