:root {
  color-scheme: dark;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --primary: #00C896;
  --primary-dark: #00A87E;
  --surface: #0F1923;
  --card: #1A2535;
  --card-light: #1E2D40;
  --accent: #FF6B35;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
body { margin: 0; background: var(--surface); overscroll-behavior: none; }

/* Splash */
.splash-logo { animation: splashPulse 1.5s ease-in-out infinite alternate; }
@keyframes splashPulse { from { transform: scale(1); } to { transform: scale(1.08); } }

/* Header */
.app-header {
  background: rgba(15,25,35,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: sticky;
  top: 0;
  z-index: 20;
}

/* Bottom Nav */
.bottom-nav {
  display: flex;
  background: rgba(26,37,53,0.98);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 8px 0 max(8px, env(safe-area-inset-bottom));
  position: sticky;
  bottom: 0;
  z-index: 20;
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 0;
  color: #6B7A8D;
  font-size: 10px;
  font-weight: 500;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
}
.nav-item i { font-size: 18px; transition: transform 0.2s; }
.nav-item.active { color: var(--primary); }
.nav-item.active i { transform: scale(1.15); }

/* Inputs */
.input-group { position: relative; }
.input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #6B7A8D;
  font-size: 14px;
  z-index: 1;
}
.ng-input {
  width: 100%;
  background: var(--card);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 14px 14px 14px 42px;
  color: white;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.ng-input:focus { border-color: var(--primary); }
.ng-input::placeholder { color: #4A5568; }

/* Buttons */
.ng-btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 24px;
  border-radius: 14px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  box-shadow: 0 4px 20px rgba(0,200,150,0.25);
}
.ng-btn-primary:active { transform: scale(0.97); opacity: 0.9; }
.ng-btn-secondary {
  background: var(--card);
  color: white;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 24px;
  border-radius: 14px;
  border: 1.5px solid rgba(255,255,255,0.1);
  cursor: pointer;
  transition: opacity 0.2s;
}
.ng-btn-secondary:active { opacity: 0.7; }
.ng-btn-accent {
  background: linear-gradient(135deg, #FF6B35, #FF4500);
  color: white;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}
.ng-btn-accent:active { transform: scale(0.97); }

/* Cards */
.ng-card {
  background: var(--card);
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.06);
}
.ng-card-light {
  background: var(--card-light);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
}

/* Section Title */
.section-title {
  font-size: 18px;
  font-weight: 800;
  color: white;
  margin: 0;
}
.section-sub {
  font-size: 13px;
  color: #6B7A8D;
}

/* Progress Ring */
.progress-ring-circle {
  transition: stroke-dashoffset 0.5s ease;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

/* Nutrient Bar */
.nutrient-bar-bg {
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
}
.nutrient-bar-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.6s ease;
}

/* Macro Badge */
.macro-badge {
  background: rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 10px 14px;
  text-align: center;
  flex: 1;
}

/* Meal Card */
.meal-card {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  transition: transform 0.15s;
}
.meal-card:active { transform: scale(0.98); }

/* Workout Card */
.workout-card {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s;
}
.workout-card:active { transform: scale(0.98); }

/* Chat */
.chat-bubble-user {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 18px 18px 4px 18px;
  padding: 12px 16px;
  max-width: 80%;
  color: white;
  font-size: 14px;
  line-height: 1.5;
}
.chat-bubble-ai {
  background: var(--card-light);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px 18px 18px 4px;
  padding: 12px 16px;
  max-width: 85%;
  color: #E2E8F0;
  font-size: 14px;
  line-height: 1.5;
}
.chat-input-bar {
  background: rgba(26,37,53,0.98);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 12px 16px max(12px, env(safe-area-inset-bottom));
}
.chat-input {
  background: var(--card);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 24px;
  padding: 10px 16px;
  color: white;
  font-size: 14px;
  outline: none;
  flex: 1;
  transition: border-color 0.2s;
}
.chat-input:focus { border-color: var(--primary); }

/* Tags */
.ng-tag {
  background: rgba(0,200,150,0.12);
  color: var(--primary);
  border-radius: 99px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid rgba(0,200,150,0.2);
  display: inline-block;
}
.ng-tag-gray {
  background: rgba(255,255,255,0.06);
  color: #94A3B8;
  border-radius: 99px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  display: inline-block;
}

/* Water Drops */
.water-drop {
  width: 32px;
  height: 40px;
  background: rgba(59,130,246,0.2);
  border: 2px solid rgba(59,130,246,0.3);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  cursor: pointer;
  transition: all 0.2s;
}
.water-drop.filled {
  background: #3B82F6;
  border-color: #60A5FA;
  box-shadow: 0 0 12px rgba(59,130,246,0.4);
}

/* Sleep */
.sleep-arc {
  filter: drop-shadow(0 0 8px rgba(139,92,246,0.4));
}

/* Community */
.community-post {
  background: var(--card);
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 0; height: 0; }

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.35s ease forwards; }

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
.slide-in-right { animation: slideInRight 0.3s ease forwards; }

/* Loading spinner */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Health Score */
.health-score-ring {
  filter: drop-shadow(0 0 10px rgba(0,200,150,0.4));
}

/* Pill tab */
.pill-tab {
  padding: 8px 18px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  color: #6B7A8D;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.pill-tab.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 12px rgba(0,200,150,0.3);
}

/* Modal overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.modal-sheet {
  background: var(--card);
  border-radius: 24px 24px 0 0;
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  animation: slideUp 0.3s ease;
}
@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 88px;
  right: 20px;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  color: white;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,200,150,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 30;
  transition: transform 0.15s;
}
.fab:active { transform: scale(0.93); }

/* Supplement card */
.supp-card {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.06);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Reports chart container */
.chart-container { position: relative; width: 100%; }

/* Gradient text */
.text-gradient {
  background: linear-gradient(135deg, var(--primary), #00E5B4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Shimmer loading */
.shimmer {
  background: linear-gradient(90deg, var(--card) 25%, var(--card-light) 50%, var(--card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* Back button */
.back-btn {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: white;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.15);
  border-radius: 99px;
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-slider:before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}
input:checked + .toggle-slider { background: var(--primary); }
input:checked + .toggle-slider:before { transform: translateX(20px); }