* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 1rem;
  font-family: -apple-system, "Segoe UI", sans-serif;
  color: #fff;
  background-color: #0d0f14;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    url("purple-abstract-3840x2160-27445.jpg");
  background-size: 24px 24px, cover;
  background-position: center, center;
  background-repeat: repeat, no-repeat;
  background-attachment: fixed;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(8, 10, 18, 0.55);
  z-index: 0;
  pointer-events: none;
}

.deck {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 580px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}

.glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.1rem 1.25rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

header h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

header p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

[contenteditable]:focus {
  outline: 1px dashed rgba(255, 255, 255, 0.3);
  outline-offset: 4px;
  border-radius: 4px;
}

.search {
  display: flex;
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 28px;
  padding: 0.35rem;
}

.search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #fff;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.search button {
  background: #7c8cf0;
  color: #fff;
  border: none;
  border-radius: 22px;
  padding: 0.5rem 1.1rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity 0.15s;
}

.search button:hover,
.search button:focus-visible {
  opacity: 0.85;
}

.head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.head h2 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  opacity: 0.6;
}

.head > button {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 7px;
  padding: 0.22rem 0.55rem;
  color: rgba(255, 255, 255, 0.75);
  cursor: pointer;
  font-size: 0.75rem;
}

.head > button:hover,
.head > button:focus-visible {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

nav#links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

.tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.72rem;
  width: 58px;
  position: relative;
}

.tile img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  padding: 5px;
  object-fit: contain;
  transition: transform 0.15s;
}

.tile:hover img,
.tile:focus-visible img {
  transform: translateY(-3px);
}

.tile:focus-visible {
  outline: 2px solid #7c8cf0;
  border-radius: 8px;
}

.del-link {
  position: absolute;
  top: -5px;
  right: 3px;
  width: 16px;
  height: 16px;
  background: rgba(210, 50, 50, 0.9);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 11px;
  cursor: pointer;
  line-height: 16px;
  text-align: center;
  opacity: 0;
  transition: opacity 0.15s;
}

.tile:hover .del-link,
.tile:focus-within .del-link,
.del-link:focus-visible {
  opacity: 1;
}

.task {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.45rem 0.4rem;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
}

.task:hover {
  background: rgba(255, 255, 255, 0.05);
}

.task input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.box {
  width: 17px;
  height: 17px;
  border-radius: 5px;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  transition: all 0.15s;
}

.task input:checked + .box {
  background: #7c8cf0;
  border-color: #7c8cf0;
}

.task input:checked + .box::after {
  content: '✓';
  color: #fff;
  font-weight: 700;
}

.task input:focus-visible + .box {
  outline: 2px solid #7c8cf0;
  outline-offset: 2px;
}

.task span:last-of-type {
  font-size: 0.875rem;
  flex: 1;
  text-align: left;
}

.task input:checked ~ span:last-of-type {
  opacity: 0.4;
  text-decoration: line-through;
}

.del-task {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.15s;
}

.task:hover .del-task,
.task:focus-within .del-task,
.del-task:focus-visible {
  opacity: 1;
}

footer p {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.35);
}

.bg-btn {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  width: auto;
  height: 38px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  font-size: 0.75rem;
  z-index: 10;
}

.bg-btn input {
  display: none;
}

@media (max-width: 480px) {
  body {
    padding: 1.5rem 0.75rem;
  }

  header h1 {
    font-size: 1.6rem;
  }

  .tile {
    width: 52px;
  }

  .tile img {
    width: 36px;
    height: 36px;
  }
}