:root {
  --bg-primary: #070b14;
  --bg-card: #0f172a;
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.07) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.07) 0px, transparent 50%);
  color: #f1f5f9;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding-bottom: calc(6rem + env(safe-area-inset-bottom, 0px));
  overflow-x: hidden;
}

/* Safe area padding for iOS PWA */
.safe-top {
  padding-top: max(0.75rem, env(safe-area-inset-top, 0.75rem));
}

.safe-bottom {
  padding-bottom: max(0.5rem, env(safe-area-inset-bottom, 0.5rem));
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: #090d16;
}
::-webkit-scrollbar-thumb {
  background: #334155;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* Anatomical SVG Muscle Zone Styles */
.body-silhouette {
  fill: #0f172a;
  stroke: #1e293b;
  stroke-width: 1.2;
}

.muscle-zone {
  transition: fill 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              stroke 0.25s ease,
              filter 0.25s ease,
              transform 0.2s ease;
  cursor: pointer;
  stroke: #090d16;
  stroke-width: 1.4;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.muscle-zone:hover {
  stroke: #38bdf8;
  stroke-width: 2.2;
  filter: brightness(1.18) drop-shadow(0 0 6px rgba(56, 189, 248, 0.45));
}

.muscle-zone.selected-muscle {
  stroke: #ffffff !important;
  stroke-width: 2.6 !important;
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.85));
  animation: pulseMuscle 2s infinite ease-in-out;
}

@keyframes pulseMuscle {
  0%, 100% {
    filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.75)) brightness(1.1);
  }
  50% {
    filter: drop-shadow(0 0 14px rgba(16, 185, 129, 0.95)) brightness(1.25);
  }
}

/* Number Input Reset */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

/* Glass cards & subtle animations */
.glass-card {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(51, 65, 85, 0.65);
}

.preset-chip {
  transition: all 0.18s ease;
}
.preset-chip:active {
  transform: scale(0.95);
}

/* Toast Notification */
#toastContainer {
  pointer-events: none;
}
.toast-item {
  animation: slideInUp 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Calendar Day Cell */
.cal-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 0.65rem;
  font-size: 0.75rem;
  transition: all 0.15s ease;
  position: relative;
}
.cal-day:active {
  transform: scale(0.92);
}