/* ── Programme/Plan Section Transitions ─────────────────────────── */

/* Container fade/slide animation for view switches - optimized for 60fps */
#pgViewContent {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}
#pgViewContent.pg-loaded {
  opacity: 1;
  transform: translateY(0);
}

/* Tab button sliding indicator */
.pg-tabs {
  position: relative;
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}
.pg-tab-indicator {
  position: absolute;
  bottom: 0;
  height: 2px;
  background: var(--disc-color);
  border-radius: 2px;
  transition: left 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Tab button active state with smooth background transition - GPU accelerated */
.pg-tab-btn {
  flex: 1;
  padding: 9px 0;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.15);
  font-size: .8rem;
  font-weight: 700;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
  background: rgba(255,255,255,.05);
  color: var(--muted);
  position: relative;
  overflow: hidden;
  will-change: transform;
  transform: translateZ(0);
}
.pg-tab-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--disc-color);
  opacity: 0;
  transition: opacity 0.15s ease;
  will-change: opacity;
}
.pg-tab-btn.active {
  color: #000;
  border-color: var(--disc-color);
}
.pg-tab-btn.active::before {
  opacity: 1;
}
.pg-tab-btn span {
  position: relative;
  z-index: 1;
  display: inline-block;
  transform: translateZ(0);
}

/* Card stagger animation for lift cards */
@keyframes pg-card-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.pg-lift-card {
  animation: pg-card-in 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.pg-lift-card:nth-child(1) { animation-delay: 0ms; }
.pg-lift-card:nth-child(2) { animation-delay: 60ms; }
.pg-lift-card:nth-child(3) { animation-delay: 120ms; }

/* Calendar cell pop-in animation */
@keyframes pg-cell-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
.pg-cal-cell {
  animation: pg-cell-in 0.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Loading shimmer effect instead of static text */
@keyframes pg-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.pg-loading {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.03) 0%,
    rgba(255,255,255,0.08) 50%,
    rgba(255,255,255,0.03) 100%
  );
  background-size: 200% 100%;
  animation: pg-shimmer 1.5s ease-in-out infinite;
  border-radius: 12px;
  height: 200px;
}

/* Back button micro-interaction */
#pgBackBtn {
  transition: transform 0.15s ease, opacity 0.15s ease;
}
#pgBackBtn:active {
  transform: translateX(-3px);
  opacity: 0.7;
}

/* Edit/Clear button hover states */
#pgEditBtn, #pgClearBtn {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
#pgEditBtn:active, #pgClearBtn:active {
  transform: scale(0.96);
}

/* Session log button pulse on load */
@keyframes pg-btn-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,215,0,0); }
  50% { box-shadow: 0 0 0 4px rgba(255,215,0,0.15); }
}
.pg-log-btn {
  animation: pg-btn-pulse 2s ease-in-out;
}

/* Entry transition for the whole programme container - removed to prevent text stutter */
/* Text rendering fix: only animate content, not the header text */
#pgContainer {
  /* No animation on container to prevent text stutter */
}

/* GPU acceleration for text elements to prevent stutter */
#pgContainer h1,
#pgContainer h2,
#pgContainer h3,
#pgContainer .font-heading,
[data-style*="font-family:'Inter'"] {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Exit transition when leaving programme */
.pg-exit {
  animation: pg-enter 0.25s cubic-bezier(0.4, 0, 1, 1) reverse both;
}

/* Wizard step transitions */
.pg-wizard-step {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.pg-wizard-step.active {
  opacity: 1;
  transform: translateX(0);
}
.pg-wizard-step.prev {
  transform: translateX(-20px);
}

/* Progress bar smooth fill */
.pg-progress-fill {
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Day sheet slide-up (for calendar day view) */
@keyframes pg-day-sheet-up {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
.pg-day-sheet {
  animation: pg-day-sheet-up 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Dot indicators pulse for planned workouts */
@keyframes pg-dot-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.8; }
}
.pg-plan-dot {
  animation: pg-dot-pulse 2s ease-in-out infinite;
}
.pg-plan-dot:nth-child(2) { animation-delay: 0.2s; }
.pg-plan-dot:nth-child(3) { animation-delay: 0.4s; }

/* Improved list item hover feedback */
.pg-list-item {
  transition: background 0.15s ease, transform 0.1s ease;
}
.pg-list-item:active {
  transform: scale(0.995);
  background: rgba(255,255,255,0.06);
}

/* Scroll-triggered fade for long content */
.pg-scroll-fade {
  mask-image: linear-gradient(to bottom, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 90%, transparent 100%);
}

/* ── My Lifts Compact List (Option 3) ─────────────────────────────────────── */
.ml-list-item {
  position: relative;
  transition: background 0.1s ease;
}
.ml-list-item:active {
  background: rgba(255, 255, 255, 0.06);
}

/* Discipline pills */
.ml-disc-pill {
  transition: all 0.15s ease;
}
.ml-disc-pill:active {
  transform: scale(0.96);
}

/* Sort buttons */
.ml-sort-btn {
  transition: all 0.15s ease;
}
.ml-sort-btn:active {
  transform: scale(0.95);
}

/* ── My Program Card with Sliding Highlight (Option 4) ────────────────────── */
@keyframes ml-program-slide {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes ml-program-arrow-bounce {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}
.ml-program-card {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--prog-color);
}
/* Sliding highlight effect */
.ml-program-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 45%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 55%,
    transparent 100%
  );
  background-size: 50% 100%;
  background-repeat: no-repeat;
  animation: ml-program-slide 3s ease-in-out infinite;
  pointer-events: none;
  z-index: 1;
}
.ml-program-card > * {
  position: relative;
  z-index: 2;
}
.ml-program-card:active {
  transform: scale(0.995);
}
.ml-program-arrow {
  animation: ml-program-arrow-bounce 1.5s ease-in-out infinite;
  will-change: transform;
}

/* ── My Lifts Discipline Switch Transitions ───────────────────────────────── */
/* Smooth fade for content switching */
#myLiftsContent,
#myLiftsSummary,
#myLiftsChart {
  will-change: transform, opacity;
}

/* Header title transition */
#ml-title {
  transition: opacity 0.15s ease;
}

/* Stats number transition */
#ml-stat-count,
#ml-stat-weight {
  transition: opacity 0.2s ease;
}

/* ── My Plan Button (Option 6: Animated Border Draw) ───────────────────────── */
@keyframes ml-border-draw {
  0% { clip-path: inset(0 100% 0 0); }
  25% { clip-path: inset(0 0 100% 0); }
  50% { clip-path: inset(0 0 0 100%); }
  75% { clip-path: inset(100% 0 0 0); }
  100% { clip-path: inset(0 100% 0 0); }
}
@keyframes ml-arrow-bounce {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}
.ml-plan-row {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}
.ml-plan-row::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid #FF6E40;
  border-radius: 14px;
  animation: ml-border-draw 3s linear infinite;
  pointer-events: none;
}
.ml-plan-row:active {
  transform: scale(0.995);
  background: rgba(255, 255, 255, 0.06);
}
.ml-plan-content {
  position: relative;
  z-index: 1;
}
.ml-plan-title {
  font-family: 'Barlow Condensed', 'Inter', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: #FF6E40;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.ml-plan-sub {
  font-size: 0.75rem;
  color: rgba(255, 110, 64, 0.7);
  margin-top: 2px;
}
.ml-plan-arrow {
  width: 18px;
  height: 18px;
  position: relative;
  z-index: 1;
  animation: ml-arrow-bounce 1.5s ease-in-out infinite;
}

/* ── AI Judge Ring ── */
@keyframes aiRingRotate { to { transform: rotate(360deg); } }