/* ========================================
   💪 Pumping Training Log - Design System
   Premium Fitness App Stylesheet
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --bg-primary: #f0f2f5;
  --bg-secondary: #e4e8ee;
  --bg-gradient-start: #f5f7fa;
  --bg-gradient-end: #e8ecf1;

  --accent-coral: #FF6B6B;
  --accent-coral-light: #FF8E53;
  --accent-purple: #667eea;
  --accent-purple-dark: #764ba2;
  --accent-green: #2ed573;
  --accent-blue: #45aaf2;

  --text-primary: #2d3436;
  --text-secondary: #636e72;
  --text-muted: #b2bec3;

  --card-bg: rgba(255, 255, 255, 0.75);
  --card-bg-solid: #ffffff;
  --card-border: rgba(255, 255, 255, 0.5);
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);

  /* Exercise category colors */
  --cat-chest: #ff6b6b;
  --cat-back: #45aaf2;
  --cat-legs: #2ed573;
  --cat-shoulders: #a55eea;
  --cat-arms: #ff9f43;
  --cat-core: #fd79a8;
  --cat-cardio: #00cec9;

  /* Layout */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background decorative blobs */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  z-index: -1;
  filter: blur(80px);
  opacity: 0.15;
}

body::before {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-light));
  top: -100px;
  right: -100px;
}

body::after {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
  bottom: -150px;
  left: -150px;
}

/* --- App Container --- */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-height: 100vh;
}

/* --- Header --- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
}

.app-header .logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-header .logo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.app-header .logo h1 {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.app-header .logo .subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.today-btn {
  padding: 8px 18px;
  border: 2px solid var(--accent-coral);
  background: transparent;
  color: var(--accent-coral);
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.today-btn:hover {
  background: var(--accent-coral);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  cursor: default;
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
}

.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.stat-card .stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.stat-card .stat-unit {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 2px;
}

.stat-card:nth-child(1) .stat-value { color: var(--accent-coral); }
.stat-card:nth-child(2) .stat-value { color: var(--accent-purple); }
.stat-card:nth-child(3) .stat-value { color: var(--accent-green); }
.stat-card:nth-child(4) .stat-value { color: var(--accent-blue); }

/* --- Calendar Controls --- */
.calendar-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
}

.month-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.month-nav h2 {
  font-size: 1.25rem;
  font-weight: 700;
  min-width: 160px;
  text-align: center;
  letter-spacing: -0.3px;
}

.nav-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.nav-btn:hover {
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-light));
  color: white;
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.nav-btn:active {
  transform: scale(0.95);
}

.view-switcher {
  display: flex;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
}

.view-btn {
  padding: 8px 20px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.view-btn.active {
  background: white;
  color: var(--accent-coral);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.view-btn:hover:not(.active) {
  color: var(--text-primary);
}

/* --- Main Content --- */
.main-content {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  flex: 1;
}

/* --- Calendar --- */
.calendar-panel {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: 24px;
  overflow: hidden;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.day-header {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 8px 0 12px;
}

.day-header:first-child {
  color: var(--accent-coral);
}

.day-header:last-child {
  color: var(--accent-blue);
}

/* Calendar Day Cell */
.day-cell {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 8px 4px;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  min-height: 70px;
}

.day-cell:hover {
  background: rgba(102, 126, 234, 0.08);
  transform: scale(1.03);
}

.day-cell:active {
  transform: scale(0.97);
}

.day-cell.other-month {
  opacity: 0.3;
  pointer-events: none;
}

.day-cell .day-number {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.day-cell.sunday .day-number {
  color: var(--accent-coral);
}

.day-cell.saturday .day-number {
  color: var(--accent-blue);
}

/* Today highlight */
.day-cell.today .day-number {
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-light));
  color: white;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.35);
  animation: pulse-today 2.5s ease-in-out infinite;
}

@keyframes pulse-today {
  0%, 100% { box-shadow: 0 4px 12px rgba(255, 107, 107, 0.35); }
  50% { box-shadow: 0 4px 20px rgba(255, 107, 107, 0.55); }
}

/* Selected day */
.day-cell.selected {
  background: rgba(102, 126, 234, 0.1);
}

.day-cell.selected .day-number {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
  color: white;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
}

.day-cell.today.selected .day-number {
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-purple));
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

/* Workout dots indicator */
.workout-dots {
  display: flex;
  gap: 3px;
  margin-top: 4px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 100%;
}

.workout-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  animation: dotAppear 0.3s ease-out;
}

@keyframes dotAppear {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.workout-dot.chest { background: var(--cat-chest); }
.workout-dot.back { background: var(--cat-back); }
.workout-dot.legs { background: var(--cat-legs); }
.workout-dot.shoulders { background: var(--cat-shoulders); }
.workout-dot.arms { background: var(--cat-arms); }
.workout-dot.core { background: var(--cat-core); }
.workout-dot.cardio { background: var(--cat-cardio); }

/* Has workout badge */
.day-cell.has-workout::after {
  content: '';
  position: absolute;
  bottom: 4px;
  width: 20px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-coral), var(--accent-purple));
  animation: dotAppear 0.3s ease-out;
}

/* --- Weekly View --- */
.calendar-grid.week-view {
  grid-template-columns: repeat(7, 1fr);
}

.calendar-grid.week-view .day-cell {
  aspect-ratio: auto;
  min-height: 200px;
  padding: 10px 8px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-sm);
}

.calendar-grid.week-view .day-cell .workout-preview {
  width: 100%;
  margin-top: 6px;
}

.workout-preview-item {
  font-size: 0.7rem;
  padding: 3px 6px;
  border-radius: 4px;
  margin-bottom: 3px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: white;
}

.workout-preview-item.chest { background: var(--cat-chest); }
.workout-preview-item.back { background: var(--cat-back); }
.workout-preview-item.legs { background: var(--cat-legs); }
.workout-preview-item.shoulders { background: var(--cat-shoulders); }
.workout-preview-item.arms { background: var(--cat-arms); }
.workout-preview-item.core { background: var(--cat-core); }
.workout-preview-item.cardio { background: var(--cat-cardio); }

/* --- Side Panel --- */
.side-panel {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100vh - 280px);
  position: sticky;
  top: 24px;
}

.side-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.side-panel-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.selected-date-display {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.add-workout-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  border: 2px dashed var(--accent-purple);
  background: rgba(102, 126, 234, 0.05);
  border-radius: var(--radius-md);
  color: var(--accent-purple);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.add-workout-btn:hover {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.add-workout-btn .plus-icon {
  font-size: 1.2rem;
  font-weight: 300;
}

/* Workout list in side panel */
.workout-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  flex: 1;
  padding-right: 4px;
}

.workout-list::-webkit-scrollbar {
  width: 4px;
}

.workout-list::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

.workout-item {
  background: var(--card-bg-solid);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  border-left: 4px solid var(--accent-coral);
  transition: var(--transition-fast);
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.workout-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transform: translateX(4px);
}

.workout-item.chest { border-left-color: var(--cat-chest); }
.workout-item.back { border-left-color: var(--cat-back); }
.workout-item.legs { border-left-color: var(--cat-legs); }
.workout-item.shoulders { border-left-color: var(--cat-shoulders); }
.workout-item.arms { border-left-color: var(--cat-arms); }
.workout-item.core { border-left-color: var(--cat-core); }
.workout-item.cardio { border-left-color: var(--cat-cardio); }

.workout-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.workout-item-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.workout-item-category {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 20px;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.workout-item-category.chest { background: var(--cat-chest); }
.workout-item-category.back { background: var(--cat-back); }
.workout-item-category.legs { background: var(--cat-legs); }
.workout-item-category.shoulders { background: var(--cat-shoulders); }
.workout-item-category.arms { background: var(--cat-arms); }
.workout-item-category.core { background: var(--cat-core); }
.workout-item-category.cardio { background: var(--cat-cardio); }

.workout-item-details {
  display: flex;
  gap: 16px;
  margin-bottom: 4px;
}

.workout-detail {
  display: flex;
  flex-direction: column;
}

.workout-detail-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.workout-detail-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.delete-workout-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  opacity: 0;
}

.workout-item:hover .delete-workout-btn {
  opacity: 1;
}

.delete-workout-btn:hover {
  color: var(--accent-coral);
  background: rgba(255, 107, 107, 0.1);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.5;
}

/* Category legend */
.category-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--card-bg-solid);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 90%;
  max-width: 480px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15);
  transform: translateY(30px) scale(0.95);
  transition: var(--transition-smooth);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-primary);
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  color: var(--text-secondary);
}

.modal-close:hover {
  background: rgba(255, 107, 107, 0.1);
  color: var(--accent-coral);
  transform: rotate(90deg);
}

/* Quick select buttons */
.quick-select {
  margin-bottom: 20px;
}

.quick-select-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  display: block;
}

.quick-select-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-btn {
  padding: 7px 14px;
  border: 1.5px solid var(--bg-secondary);
  background: white;
  border-radius: 20px;
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.quick-btn:hover {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
  background: rgba(102, 126, 234, 0.05);
}

.quick-btn.selected {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
  color: white;
  border-color: transparent;
  box-shadow: 0 3px 10px rgba(102, 126, 234, 0.3);
}

/* Form styles */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.3px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent-purple);
  background: white;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.form-submit-btn {
  width: 100%;
  padding: 14px;
  border: none;
  background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-light));
  color: white;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  margin-top: 8px;
  letter-spacing: 0.3px;
}

.form-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.35);
}

.form-submit-btn:active {
  transform: translateY(0);
}

/* --- Footer --- */
.app-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
}

.app-footer a {
  color: var(--accent-purple);
  text-decoration: none;
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  z-index: 2000;
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: linear-gradient(135deg, var(--accent-green), #20bf6b);
}

.toast.error {
  background: linear-gradient(135deg, var(--accent-coral), #ee5a24);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: static;
    max-height: none;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .app-header {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .calendar-grid.week-view .day-cell {
    min-height: 120px;
  }
}

@media (max-width: 600px) {
  .app-container {
    padding: 12px;
    gap: 12px;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .calendar-panel {
    padding: 12px;
  }

  .day-cell {
    min-height: 50px;
    padding: 4px 2px;
  }

  .day-cell .day-number {
    font-size: 0.8rem;
    width: 26px;
    height: 26px;
  }

  .month-nav h2 {
    font-size: 1rem;
    min-width: 120px;
  }

  .calendar-controls {
    flex-direction: column;
    gap: 12px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal {
    padding: 24px;
    border-radius: var(--radius-lg);
  }
}