/* Page Frame — mock browser window */
.page-frame {
  max-width: 1280px;
  margin: 0 auto;
  background: #F5F5F5;
  border-radius: 0;
  box-shadow: none;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Desktop styling */
@media (min-width: 768px) {
  .page-frame {
    margin: 24px auto;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
    min-height: calc(100vh - 48px);
  }
}

/* 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 {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  color: #666;
  padding: 4px;
  transition: color 0.2s;
}

.volume-icon:hover {
  color: #000;
}

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

/* Hero */
.hero {
  text-align: center;
  padding: 24px 16px 20px;
  flex-shrink: 0;
}

.hero h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1.2;
  max-width: 650px;
  margin: 0 auto 10px;
  color: #111;
}

@media (min-width: 768px) {
  .hero {
    padding: 56px 24px 44px;
  }
  
  .hero h1 {
    font-size: 48px;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin: 0 auto 14px;
  }
}

.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: flex-start;
  padding: 0 8px 16px;
}

@media (min-width: 768px) {
  .board-section {
    padding: 0 24px 32px;
  }
}

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

:fullscreen .page-frame {
  margin: 0;
  border-radius: 0;
  background: var(--theme-board-bg, #0F0F0F);
}

:fullscreen .board-section {
  padding: 0;
  min-height: 100vh;
  width: 100vw;
  align-items: center;
  justify-content: center;
}

:fullscreen .board {
  width: 100vw;
  min-height: 100vh;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--theme-board-bg, #0F0F0F);
}

/* Hide email and keyboard hint on mobile */
.hero-cta input,
.hero p:last-child {
  display: none;
}

@media (min-width: 768px) {
  .hero-cta input,
  .hero p:last-child {
    display: block;
  }
}

.hero-cta button {
  width: 100%;
}

@media (min-width: 768px) {
  .hero-cta button {
    width: auto;
  }
}

/* Mode notification (theme/clock changes) */
.mode-notification {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.mode-notification.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}