:root {
  --bg-primary: #0A0E27;
  --bg-card: #1A1F3A;
  --color-primary: #00D9FF;
  --color-secondary: #39FF14;
  --color-text: #FFFFFF;
  --color-text-secondary: #A0AEC0;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  background-color: var(--bg-primary);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

.app-container {
  max-width: 500px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  padding-bottom: 80px;
}

.screen {
  min-height: 100vh;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
}

/* Welcome Screen */
.welcome-screen {
  justify-content: center;
  align-items: center;
  text-align: center;
  background: 
    radial-gradient(ellipse at 50% 0%, rgba(0, 217, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(57, 255, 20, 0.1) 0%, transparent 40%),
    var(--bg-primary);
}

.welcome-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo-emoji {
  font-size: 72px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.logo-text {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), #8B5CF6, var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(0, 217, 255, 0.3);
}

.tagline {
  font-size: 18px;
  color: var(--color-text-secondary);
  font-style: italic;
}

.science-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 20px;
  max-width: 320px;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.science-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--bg-primary);
  font-size: 18px;
  font-weight: 700;
  padding: 16px 48px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.4);
  font-family: 'Space Grotesk', sans-serif;
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 0 50px rgba(0, 217, 255, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--color-secondary);
  font-size: 16px;
  font-weight: 600;
  padding: 14px 32px;
  border: 2px solid var(--color-secondary);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Space Grotesk', sans-serif;
}

.btn-secondary:hover {
  background: rgba(57, 255, 20, 0.1);
}

.footer {
  position: absolute;
  bottom: 100px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.footer a {
  color: var(--color-primary);
  text-decoration: none;
}

/* Screen Title */
.screen-title {
  font-size: 28px;
  text-align: center;
  margin-bottom: 24px;
  font-weight: 600;
}

/* Wait Selection */
.wait-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 16px 0;
}

.wait-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: 20px;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Space Grotesk', sans-serif;
}

.wait-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
  transform: translateY(-4px);
}

.wait-emoji {
  font-size: 48px;
}

.wait-name {
  font-size: 16px;
  font-weight: 600;
  text-align: center;
}

.wait-details {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Exercise Selection */
.back-btn {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 16px;
  cursor: pointer;
  margin-bottom: 16px;
  font-family: 'Space Grotesk', sans-serif;
}

.exercise-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.exercise-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  font-family: 'Space Grotesk', sans-serif;
}

.exercise-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 25px rgba(0, 217, 255, 0.3);
}

.exercise-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 24px;
}

.exercise-name {
  font-size: 20px;
  font-weight: 600;
}

.exercise-image {
  width: 180px;
  height: 180px;
  object-fit: contain;
}

.exercise-tagline {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* Workout Screen */
.workout-screen {
  padding-top: 16px;
  justify-content: flex-start;
}

.workout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.progress-text {
  font-size: 18px;
  color: var(--color-text-secondary);
  font-family: 'JetBrains Mono', monospace;
}

.close-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 32px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.workout-card {
  background: var(--bg-card);
  border-radius: 24px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  border: 1px solid rgba(0, 217, 255, 0.2);
  flex: 1;
  max-height: 70vh;
  overflow: hidden;
}

.workout-card.exiting {
  transform: translateY(100vh) !important;
  opacity: 0 !important;
}

.rep-title {
  font-size: 24px;
  font-weight: 600;
  text-align: center;
}

.workout-image {
  width: 200px;
  height: 200px;
  object-fit: contain;
}

.motivation-text {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  text-align: center;
  animation: pulse 1.5s ease-in-out infinite;
  text-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.advice-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  text-align: center;
}

.swipe-hint {
  font-size: 14px;
  color: var(--color-text-secondary);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: 8px;
}

.swipe-arrow {
  animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

.tap-complete-btn {
  background: var(--bg-card);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  padding: 16px 32px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 16px;
  font-family: 'Space Grotesk', sans-serif;
}

/* Complete Screen */
.complete-screen {
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.confetti-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: fall 3s ease-in-out infinite;
}

@keyframes fall {
  0% {
    transform: translateY(-100px) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

.complete-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  z-index: 1;
}

.complete-title {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sarcastic-message {
  font-size: 18px;
  color: var(--color-text);
  text-align: center;
}

.wait-message {
  font-size: 20px;
  color: var(--color-primary);
}

.stats-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  gap: 32px;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  font-family: 'JetBrains Mono', monospace;
}

.stat-label {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.earned-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-top: 16px;
}

.complete-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Cheat Screen */
.cheat-screen {
  background: 
    radial-gradient(ellipse at 50% 50%, rgba(255, 107, 107, 0.1) 0%, transparent 50%),
    var(--bg-primary);
}

.cheat-card {
  background: linear-gradient(135deg, var(--bg-card), rgba(255, 107, 107, 0.1));
}

.cheat-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
}

.food-emoji {
  font-size: 100px;
  animation: wiggle 0.5s ease-in-out infinite;
}

@keyframes wiggle {
  0%, 100% { transform: rotate(-3deg); }
  50% { transform: rotate(3deg); }
}

.food-emoji-large {
  font-size: 80px;
}

.cheat-text {
  font-size: 20px;
  text-align: center;
}

.cheat-subtext {
  font-size: 16px;
  color: var(--color-text-secondary);
}

.cheat-stats {
  display: flex;
  gap: 24px;
  font-size: 16px;
  color: var(--color-secondary);
}

/* Progress Screen */
.progress-screen {
  gap: 24px;
}

.progress-section {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  font-family: 'JetBrains Mono', monospace;
}

.favorites {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.favorites p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.nutrition-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}

.nutrition-item {
  font-size: 18px;
}

.no-data {
  color: var(--color-text-secondary);
  font-style: italic;
}

.total-calories {
  font-size: 16px;
  color: var(--color-secondary);
  font-weight: 600;
}

/* Settings Screen */
.settings-screen {
  gap: 16px;
}

.settings-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.setting-item {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(0, 217, 255, 0.2);
}

.toggle {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Space Grotesk', sans-serif;
}

.toggle.on {
  background: var(--color-primary);
  color: var(--bg-primary);
  border: none;
}

.toggle.off {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-text-secondary);
}

/* Navigation Bar */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-top: 1px solid rgba(0, 217, 255, 0.2);
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 8px 0;
  max-width: 500px;
  margin: 0 auto;
}

.nav-item {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 32px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'Space Grotesk', sans-serif;
}

.nav-item.active .nav-icon,
.nav-item.active .nav-label {
  color: var(--color-primary);
}

.nav-icon {
  font-size: 24px;
}

.nav-label {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* Mobile optimizations */
@media (max-width: 400px) {
  .logo-text {
    font-size: 36px;
  }
  
  .motivation-text {
    font-size: 40px;
  }
  
  .stats-card {
    flex-direction: column;
    gap: 16px;
  }
  
  .complete-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
  }
}