:root {
  --ink: #0a0a0a;
  --paper: #f6f4ef;
  --paper-2: #ffffff;
  --muted: #6b6b6b;
  --hair: #1a1a1a;
}

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
}

.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 22px 80px;
}

/* Masthead */
.rule { height: 1px; background: var(--ink); width: 100%; }
.rule--thin { height: 1px; background: var(--ink); opacity: 0.35; }

.meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
}
.meta__center { flex: 1; text-align: center; }
.meta__right { text-align: right; }

.title {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: clamp(58px, 14vw, 128px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  margin: 36px 0 28px;
}
.title__line { display: block; }
.title__line--italic {
  font-style: italic;
  font-weight: 300;
  padding-left: 0.6em;
}

.deck {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-weight: 300;
  font-size: clamp(15px, 2.4vw, 18px);
  color: var(--ink);
  max-width: 44ch;
  margin: 0 0 28px;
}

/* List */
.list { margin-top: 8px; }
.items {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: item;
}

.item {
  border-bottom: 1px solid var(--ink);
}
.item:first-child { border-top: 1px solid var(--ink); }

.item__btn {
  all: unset;
  display: grid;
  grid-template-columns: 56px 1fr 28px;
  gap: 16px;
  align-items: center;
  width: 100%;
  padding: 26px 4px;
  cursor: pointer;
  min-height: 72px;
  transition: background 180ms ease, padding 220ms ease;
}
.item__btn:hover { background: var(--paper-2); }
.item__btn:focus-visible {
  outline: none;
  background: var(--paper-2);
  box-shadow: inset 0 0 0 1px var(--ink);
}

.item__index {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-weight: 300;
  font-size: 28px;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.item__body { display: flex; flex-direction: column; gap: 4px; }

.item__title {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: clamp(20px, 3.2vw, 26px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  position: relative;
  display: inline-block;
  transition: color 240ms ease, opacity 240ms ease;
}

/* strike-through line animation */
.item__title::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 55%;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 380ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.item__note {
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.item__box {
  width: 22px;
  height: 22px;
  border: 1px solid var(--ink);
  justify-self: end;
  position: relative;
  transition: background 220ms ease;
}
.item__box::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--ink);
  transform: scale(0);
  transform-origin: center;
  transition: transform 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* Checked state */
.item[data-done="true"] .item__title { color: var(--muted); }
.item[data-done="true"] .item__title::after { transform: scaleX(1); }
.item[data-done="true"] .item__index { opacity: 0.35; }
.item[data-done="true"] .item__note { opacity: 0.55; }
.item[data-done="true"] .item__box::after { transform: scale(1); }

/* Footer */
.foot { margin-top: 56px; }
.progress {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
}
.progress__count { font-family: 'Fraunces', serif; font-style: italic; font-weight: 300; font-size: 16px; letter-spacing: 0; text-transform: none; }

.progress__bar {
  width: 100%;
  height: 2px;
  background: rgba(10,10,10,0.14);
  position: relative;
  overflow: hidden;
}
.progress__fill {
  position: absolute;
  inset: 0 100% 0 0;
  background: var(--ink);
  transition: right 420ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reset {
  all: unset;
  margin-top: 22px;
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease;
}
.reset:hover { background: var(--ink); color: var(--paper); }
.reset:focus-visible { outline: none; background: var(--ink); color: var(--paper); }

.colophon {
  margin-top: 44px;
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-weight: 300;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

/* Desktop */
@media (min-width: 720px) {
  .page { padding: 64px 40px 96px; }
  .item__btn { grid-template-columns: 84px 1fr 28px; padding: 34px 8px; min-height: 96px; }
  .item__index { font-size: 34px; }
  .item__box { width: 26px; height: 26px; }
  .item__box::after { inset: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}