@import '../shared.css';

.back-link {
  position: fixed;
  top: 1.5rem;
  left: 1.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--fg);
}

/* ======================================================
   MAIN APP
====================================================== */

#app {
  max-width: 620px;
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
  min-height: 100vh;
}

/* ---- Header ---- */

.app-header {
  margin-bottom: 2.5rem;
  user-select: none;
  text-align: center;
}

.app-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 6rem);
  font-weight: 900;
  line-height: 0.88;
  letter-spacing: -0.03em;
}

.header-rule {
  height: 1px;
  background: var(--rule);
  margin: 1.1rem 0 0.8rem;
}

.header-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---- List ---- */

#list {
  list-style: none;
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.list-item {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--rule);
  max-height: 80px;
  overflow: hidden;
  transition:
    max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.4s ease,
    padding 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.5s ease;
}

.list-item.fresh {
  animation: slide-in 0.3s cubic-bezier(0.2, 0, 0, 1) forwards;
}

.list-item.removing {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-bottom-color: transparent;
}

/* ---- Drag handle ---- */

.drag-handle {
  color: var(--muted);
  font-size: 0.8rem;
  cursor: grab;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.15s;
  user-select: none;
  line-height: 1;
}

.list-item:hover .drag-handle {
  opacity: 1;
}

.list-item.dragging {
  opacity: 0.35;
}

.list-item.drag-above {
  box-shadow: 0 -2px 0 var(--fg);
}

.list-item.drag-below {
  box-shadow: 0 2px 0 var(--fg);
}

/* Custom checkbox */

.item-check {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--muted);
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s;
}

.item-check:hover {
  border-color: var(--fg);
}

.item-check:checked {
  border-color: var(--fg);
  background: none;
}

.item-check:checked::before {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--fg);
}

/* Item text + strikethrough */

.item-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.4;
  flex: 1;
  position: relative;
  color: var(--fg);
  transition: color 0.35s ease;
  cursor: default;
  user-select: none;
}

.item-text::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 1px;
  background: var(--fg);
  width: 0;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.list-item.completing .item-text {
  color: var(--muted);
}

.list-item.completing .item-text::after {
  width: 100%;
}

/* ---- Empty state ---- */

.empty-state {
  padding: 3rem 0 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  display: none;
}

.empty-state.visible {
  display: block;
}

/* ---- Add form ---- */

.add-form {
  border-top: 1px solid var(--rule);
  padding: 0.95rem 0;
}

.add-form-inner {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.add-prompt {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  flex-shrink: 0;
  user-select: none;
}

.add-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--fg);
  padding: 0.3rem 0;
  caret-color: var(--fg);
}

.add-input::placeholder {
  color: var(--muted);
  font-style: italic;
}

.add-btn {
  background: none;
  border: 1px solid var(--muted);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.add-btn:hover,
.add-btn:focus-visible {
  border-color: var(--fg);
  color: var(--bg);
  background: var(--fg);
}