:root {
  --bg-dark: #0f172a;
  --bg-glass: rgba(30, 41, 59, 0.7);
  --bg-glass-hover: rgba(51, 65, 85, 0.8);
  --accent-primary: #38bdf8;
  --accent-secondary: #818cf8;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --glass-border: rgba(255, 255, 255, 0.1);
  --danger: #ef4444;
  --success: #10b981;
  --font-main: 'Inter', sans-serif;
  --font-accent: 'Patrick Hand', cursive;
}

/* Reset & Global */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scrollbar-width: thin;
  scroll-behavior: smooth;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  min-height: 100vh;
  font-family: var(--font-main);
  color: var(--text-main);
  background-color: var(--bg-dark);
}

/* Background Gradient Effect */
.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background:
    radial-gradient(circle at top right, #1e293b, transparent),
    radial-gradient(circle at bottom left, #1e1b4b, transparent);
}

/* Container */
.container {
  z-index: 1;
  width: 90%;
  max-width: 500px;
  padding: 2rem;
}

/* Glassmorphism Utility  */
.glass {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 1.5rem;
  border: 1px solid var(--glass-border);
  background: var(--bg-glass);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header__title {
  font-family: var(--font-accent);
  font-size: 3rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    to right,
    var(--accent-primary),
    var(--accent-secondary)
  );
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header__date {
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 2px;
  color: var(--text-muted);
}

/* Stats Section */
.stats {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.stats__item {
  text-align: center;
  transition: transform 0.3s ease;
  flex: 1;
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid var(--glass-border);
  background: var(--bg-glass);
}

.stats__item:hover {
  transform: translateY(-5px);
  background: var(--bg-glass-hover);
}

.stats__item span {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.stats__item p {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.25rem;
}

/* Main Content */
.main {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Form */
.main__form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.main__input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  color: white;
  font-family: var(--font-main);
  outline: none;
  transition: all 0.3s ease;
}

.main__input:focus {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
}

.main__button {
  background: linear-gradient(
    135deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border: none;
  border-radius: 0.75rem;
  width: 3rem;
  height: 3rem;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
}

.main__button:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.main__button:active {
  transform: scale(0.95);
}

/* Filters */
.filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.filters__btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 0.5rem;
  padding: 0.4rem 0.8rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s ease;
}

.filters__btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.filters__btn--active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.filters__btn--clear {
  margin-left: auto;
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.2);
}

.filters__btn--clear:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
}

/* Task List */
.main__taskView {
  list-style: none;
  max-height: 30dvh;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.main__taskView::-webkit-scrollbar {
  width: 4px;
}

.main__taskView::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 10px;
}

.taskView__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 1rem;
  margin-bottom: 0.75rem;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.taskView__item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--glass-border);
}

.item__check {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--accent-primary);
  border-radius: 0.4rem;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
}

.item__check:checked {
  background: var(--accent-primary);
}

.item__check:checked::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 0.8rem;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.item__text {
  flex: 1;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.taskView__item--done .item__text {
  text-decoration: line-through;
  color: var(--text-muted);
}

.item__button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
}

.item__button:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* Footer */
.footer {
  margin-top: 2rem;
  text-align: center;
}

.footer__link {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.footer__link a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.footer__link a:hover {
  color: var(--accent-primary);
}

.footer__text {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    width: 95%;
    max-height: 90dvh;
    padding: 1rem;
  }

  .header__title {
    font-size: 2.5rem;
  }

  .stats {
    gap: 0.5rem;
  }

  .stats__item {
    padding: 0.75rem 0.5rem;
  }

  .filters {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }

  .filters__btn {
    flex: 1;
  }

  .main__taskView {
    max-height: 30dvh;
  }
}