@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;600;800&display=swap');

:root {
  --color-bg: #fff;
  --color-fg: #111111;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
  --transition-fast: 0.13s cubic-bezier(.4,0,.2,1);
}
body.dark-theme {
  --color-bg: #181a1b;
  --color-fg: #fff;
}

body {
  font-family: 'Chakra Petch', 'Inter', sans-serif;
  background: var(--color-bg);
  color: var(--color-fg);
  margin: 0;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

.sf-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2vw 1.2rem 2vw;
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--color-fg);
  transition: background var(--transition);
}

.sf-title {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-fg);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color var(--transition), transform var(--transition-fast);
  cursor: pointer;
}
.sf-title:hover, .sf-title:focus {
  color: var(--color-fg);
  transform: scale(1.04);
}

.sf-clock {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  background: transparent;
  padding: 0.3em 1em;
  border-radius: 1em;
  transition: background var(--transition), color var(--transition);
  user-select: none;
}

.sf-main {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
  padding: 2vw;
}

.sf-game-container {
  background: var(--color-bg);
  border-radius: 1.2rem;
  border: 1px solid var(--color-fg);
  padding: 2rem 1.5rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  max-width: 420px;
  width: 100%;
  position: relative;
  transition: background var(--transition), border var(--transition);
}

#cameraFeed, #overlay {
  width: 100%;
  max-width: 360px;
  height: 240px;
  border-radius: 1rem;
  background: #000;
  object-fit: cover;
  position: relative;
  top: 0;
  left: 0;
  transform: none;
  transition: box-shadow var(--transition), filter var(--transition);
  margin-bottom: 0.5rem;
  border: 1px solid var(--color-fg);
}
#cameraFeed:focus {
  outline: 1.5px solid var(--color-fg);
  filter: brightness(1.04) saturate(1.04);
}
#overlay {
  pointer-events: none;
  z-index: 2;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
}

.sf-timer {
  font-size: 2rem;
  font-weight: 600;
  margin-top: 0.5rem;
  letter-spacing: 0.06em;
  color: var(--color-fg);
  text-shadow: none;
  filter: none;
  transition: color var(--transition);
  user-select: none;
}

.sf-start-btn {
  margin-top: 0.2rem;
  padding: 0.7em 1.8em;
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid var(--color-fg);
  border-radius: 1em;
  background: var(--color-bg);
  color: var(--color-fg);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border var(--transition), transform var(--transition-fast);
  will-change: transform;
  outline: none;
}
.sf-start-btn:hover, .sf-start-btn:focus {
  background: var(--color-fg);
  color: var(--color-bg);
  border: 1px solid var(--color-fg);
  transform: scale(1.04);
}
.sf-start-btn:active {
  transform: scale(0.98);
}

.sf-status {
  min-height: 1.2em;
  font-size: 0.98rem;
  color: #e53935;
  font-weight: 500;
  text-align: center;
  margin-top: 0.3em;
  text-shadow: none;
  transition: color var(--transition);
  animation: none;
}

.sf-bottom-right {
  position: fixed;
  right: 2vw;
  bottom: 2vw;
  display: flex;
  flex-direction: column;
  gap: 0.8em;
  z-index: 20;
}

.sf-btn {
  background: var(--color-bg);
  color: var(--color-fg);
  border: 1px solid var(--color-fg);
  border-radius: 1em;
  padding: 0.6em 1.3em;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5em;
  transition: background var(--transition), color var(--transition), border var(--transition), transform var(--transition-fast);
  will-change: transform;
  outline: none;
}
.sf-btn:hover, .sf-btn:focus {
  background: var(--color-fg);
  color: var(--color-bg);
  border: 1px solid var(--color-fg);
  transform: scale(1.04);
}
.sf-btn:active {
  transform: scale(0.97);
}
.sf-theme-toggle {
  font-size: 1.1em;
  padding: 0.6em 1em;
}

/* Modal styles */
.sf-modal {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0; top: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.10);
  justify-content: center;
  align-items: center;
  transition: background var(--transition);
}
.sf-modal.active {
  display: flex;
}
.sf-modal-content {
  background: var(--color-bg);
  color: var(--color-fg);
  border-radius: 1em;
  border: 1px solid var(--color-fg);
  padding: 1.5em 1.5em 1.2em 1.5em;
  min-width: 280px;
  max-width: 95vw;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1em;
  animation: modalIn 0.18s cubic-bezier(.4,0,.2,1);
  transition: background var(--transition), border var(--transition);
}
@keyframes modalIn {
  from { transform: translateY(24px) scale(0.98); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.sf-close-modal {
  align-self: flex-end;
  margin-top: 0.3em;
  background: var(--color-bg);
  color: var(--color-fg);
  font-size: 0.98em;
  padding: 0.4em 1em;
  border-radius: 0.8em;
  border: 1px solid var(--color-fg);
  transition: background var(--transition), color var(--transition), border var(--transition), transform var(--transition-fast);
  cursor: pointer;
}
.sf-close-modal:hover, .sf-close-modal:focus {
  background: var(--color-fg);
  color: var(--color-bg);
  border: 1px solid var(--color-fg);
  transform: scale(1.04);
}

/* Switch styles */
.sf-switch {
  display: flex;
  align-items: center;
  gap: 0.5em;
  margin: 0.7em 0;
}
.sf-switch input {
  display: none;
}
.sf-slider {
  width: 34px;
  height: 18px;
  background: #ccc;
  border-radius: 18px;
  position: relative;
  transition: background var(--transition), border var(--transition), transform var(--transition-fast);
  cursor: pointer;
  border: 1px solid var(--color-fg);
}
.sf-slider:before {
  content: '';
  position: absolute;
  left: 2.5px;
  top: 2.5px;
  width: 13px;
  height: 13px;
  background: var(--color-bg);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
  border: 1px solid var(--color-fg);
}
.sf-switch input:checked + .sf-slider {
  background: var(--color-fg);
  border: 1px solid var(--color-fg);
}
.sf-switch input:checked + .sf-slider:before {
  transform: translateX(13px);
  background: var(--color-fg);
  border: 1px solid var(--color-bg);
}
.sf-switch-label {
  font-size: 0.98em;
  color: inherit;
}

/* Leaderboard styles */
#leaderboardList {
  padding-left: 1em;
  font-size: 0.98em;
  margin: 0.3em 0 0 0;
}
#leaderboardList li {
  margin-bottom: 0.2em;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--transition), transform var(--transition-fast);
}
#leaderboardList li:hover, #leaderboardList li:focus {
  color: var(--color-fg);
  transform: scale(1.02);
}

@media (max-width: 600px) {
  .sf-header, .sf-main, .sf-game-container {
    padding: 0.7em 2vw;
  }
  .sf-game-container {
    max-width: 98vw;
    padding: 0.7em 0.3em 0.7em 0.3em;
  }
  #cameraFeed, #overlay {
    width: 98vw;
    height: 56vw;
    min-height: 140px;
    max-width: 98vw;
    max-height: 320px;
  }
  .sf-timer {
    margin-top: 0.2rem;
  }
}