/* Glassmorphism Design System */
/* Smooth Theme Transitions via @property */
@property --bg-gradient-1 {
  syntax: '<color>';
  inherits: true;
  initial-value: #2e1065;
}

@property --bg-gradient-2 {
  syntax: '<color>';
  inherits: true;
  initial-value: #4c1d95;
}

@property --bg-gradient-3 {
  syntax: '<color>';
  inherits: true;
  initial-value: #f59e0b;
}

@property --accent {
  syntax: '<color>';
  inherits: true;
  initial-value: #f59e0b;
}

:root {
  /* Glass Variables */
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --glass-blur: 16px;

  --success: #34d399;
  /* Emerald */
  --danger: #fb7185;
  /* Rose */

  /* Default (Night/Midnight) Theme Variables */
  --bg-gradient-1: #2e1065;
  --bg-gradient-2: #4c1d95;
  --bg-gradient-3: #f59e0b;

  --glass-bg: rgba(30, 27, 75, 0.4);
  --glass-border: rgba(255, 255, 255, 0.15);
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --accent: #f59e0b;
  --accent-glow: rgba(245, 158, 11, 0.5);
}

/* THEMES */
body {
  transition: --bg-gradient-1 3s, --bg-gradient-2 3s, --bg-gradient-3 3s, --accent 3s;
}

body.theme-morning {
  /* Sunrise: Pink/Blue/Gold */
  --bg-gradient-1: #db2777;
  --bg-gradient-2: #2563eb;
  --bg-gradient-3: #fbbf24;

  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.25);
  --accent: #fbbf24;
  --accent-glow: rgba(251, 191, 36, 0.5);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  width: 90%;
  max-width: 320px;
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s;
}

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

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  justify-content: center;
}

.btn-danger {
  background: var(--danger);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}

/* Evolution Logo Styles */
.logo-part {
  transition: opacity 0.5s, transform 0.5s;
  opacity: 0.1;
  /* Default Hidden state */
}

.logo-part.active {
  opacity: 1;
  filter: drop-shadow(0 0 5px var(--accent-glow));
}

.logo-svg.shiver {
  animation: shiver 0.1s infinite;
}

@keyframes shiver {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }

  25% {
    transform: translate(-1px, 1px) rotate(-1deg);
  }

  50% {
    transform: translate(1px, -1px) rotate(1deg);
  }

  75% {
    transform: translate(-1px, -1px) rotate(0deg);
  }

  100% {
    transform: translate(1px, 1px) rotate(0deg);
  }
}

body.theme-noon {
  /* Bright: Sky Blue/Yellow */
  --bg-gradient-1: #0ea5e9;
  /* Sky */
  --bg-gradient-2: #3b82f6;
  /* Blue */
  --bg-gradient-3: #fcd34d;
  /* Light Yellow */
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.3);
  --accent: #fde047;
  /* Bright Yellow */
  --accent-glow: rgba(253, 224, 71, 0.6);
}

body.theme-afternoon {
  /* Warm: Orange/Amber */
  --bg-gradient-1: #ea580c;
  /* Orange */
  --bg-gradient-2: #ca8a04;
  /* Dark Gold */
  --bg-gradient-3: #f97316;
  /* Bright Orange */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --accent: #fca5a5;
  /* Soft Red/Pink accent */
  --accent-glow: rgba(252, 165, 165, 0.5);
}

body.theme-evening {
  /* Sunset: Purple/Red */
  --bg-gradient-1: #7c3aed;
  /* Violet */
  --bg-gradient-2: #db2777;
  /* Pink */
  --bg-gradient-3: #c026d3;
  /* Fuchsia */
  --glass-bg: rgba(50, 20, 80, 0.3);
  --glass-border: rgba(255, 255, 255, 0.15);
  --accent: #e879f9;
  /* Light Purple */
  --accent-glow: rgba(232, 121, 249, 0.5);
}

body.theme-night {
  /* Deep: Indigo/Black (Default) - Fallback to root variables */
  /* No specific variables defined here, as they are the default in :root */
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  /* Better for scrollable desktop content */
  min-height: 100vh;
  padding: 40px 20px;
  background: linear-gradient(135deg, #0f172a, #312e81, #581c87, #1e1b4b);
  background-size: 400% 400%;
  animation: gradientBG 20s ease infinite;
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.container {
  width: 100%;
  max-width: 500px;
  /* Mobile default */
  position: relative;
  z-index: 10;
  margin: 0 auto;
}

/* Header & Logo */
.header-section {
  text-align: center;
  margin-bottom: 30px;
}

.logo-svg {
  width: 64px;
  height: 64px;
  fill: var(--accent);
  filter: drop-shadow(0 0 10px var(--accent-glow));
  margin-bottom: 12px;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }

}

h1 {
  font-weight: 800;
  margin: 0;
  font-size: 2rem;
  background: linear-gradient(to right, #fff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  letter-spacing: 0.5px;
  margin-top: 8px;
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  padding: 24px;
  margin-bottom: 24px;
  transition: transform 0.3s ease, border-color 0.3s;
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.3);
}

.section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 20px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 24px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent);
}

/* Tasks */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.2s;
}

.task-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.task-label {
  flex-grow: 1;
  margin-left: 14px;
  cursor: pointer;
  font-size: 1rem;
}

/* Custom Checkbox */
input[type="checkbox"] {
  appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--text-secondary);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}

input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  color: #0f172a;
  /* Dark text on bright accent */
  font-weight: 800;
  font-size: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.delete-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  opacity: 0.5;
  padding: 8px;
  transition: all 0.2s;
  font-size: 1.2rem;
}

.delete-btn:hover {
  opacity: 1;
  color: var(--danger);
}

/* Progress Bar */
.progress-container {
  height: 16px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 20px;
  overflow: hidden;
  margin: 16px 0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #fcd34d);
  /* Amber to lighter gold */
  box-shadow: 0 0 15px var(--accent-glow);
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

/* Shimmer Effect on Progress Bar */
.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: translateX(-100%);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  100% {
    transform: translateX(100%);
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  text-align: center;
}

.stat-box {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  padding: 16px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  margin: 4px 0;
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent-glow);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Inputs & Buttons */
.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

input[type="text"] {
  flex-grow: 1;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 14px;
  color: white;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s;
}

input[type="text"]::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

input[type="text"]:focus {
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.btn-primary {
  background: var(--accent);
  color: #0f172a;
  border: none;
  padding: 12px 24px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.2rem;
  transition: all 0.2s;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px;
  width: 100%;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 10px;
  transition: all 0.2s;
  font-size: 0.9rem;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Chart */
.chart-container {
  height: 180px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px;
  padding-top: 20px;
}

.chart-bar {
  flex-grow: 1;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  position: relative;
  transition: height 1s cubic-bezier(0.34, 1.56, 0.64, 1);
  min-height: 4px;
}

.chart-bar.filled {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.chart-label {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Confetti hidden container */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
}

/* DESKTOP LAYOUT */
@media (min-width: 900px) {
  .container {
    max-width: 1000px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
    align-items: start;
  }

  .header-section {
    grid-column: 1 / -1;
    margin-bottom: 40px;
  }

  .task-section {
    grid-column: 1 / 2;
  }

  .stats-sidebar {
    grid-column: 2 / 3;
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 20px;
  }

  /* Modify cards for sidebar context */
  .stats-sidebar .glass-card {
    margin-bottom: 0;
  }
}