:root {
  --canvas: var(--tg-theme-secondary-bg-color, #f6f7f7);
  --surface: var(--tg-theme-bg-color, #ffffff);
  --ink: var(--tg-theme-text-color, #202427);
  --muted: var(--tg-theme-hint-color, #747b80);
  --accent: var(--tg-theme-button-color, #3186c8);
  --danger: var(--tg-theme-destructive-text-color, #c94e4e);
  --line: color-mix(in srgb, var(--muted) 20%, transparent);
  --hover: color-mix(in srgb, var(--ink) 4%, var(--surface));
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: var(--tg-theme-secondary-bg-color, #17191b);
    --surface: var(--tg-theme-bg-color, #232629);
    --ink: var(--tg-theme-text-color, #f2f4f5);
    --muted: var(--tg-theme-hint-color, #9aa2a8);
    --accent: var(--tg-theme-button-color, #69b8ed);
    --danger: var(--tg-theme-destructive-text-color, #ef7777);
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  min-height: 100vh;
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main {
  width: min(100%, 620px);
  margin: 0 auto;
  padding: 32px 20px calc(32px + env(safe-area-inset-bottom));
}
h1 {
  margin: 0 0 22px;
  font-size: clamp(29px, 7vw, 35px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
}
#back:not([href]) { display: none; }
#back {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin: -8px 0 20px -8px;
  padding: 0 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 9px;
}
#back:hover { background: var(--hover); }
#lists, #items {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
#lists:empty, #items:empty { display: none; }
#lists:not(:has(.list-row)) {
  padding: 24px 20px;
  color: var(--muted);
  text-align: center;
}
#lists .list-row {
  display: flex;
  align-items: stretch;
  min-height: 68px;
}
#lists .list-row + .list-row,
#items label + label { border-top: 1px solid var(--line); }
#lists .list-row a {
  display: flex;
  flex: 1;
  align-items: center;
  min-width: 0;
  gap: 12px;
  padding: 15px 12px 15px 20px;
  color: var(--ink);
  font-weight: 550;
  text-decoration: none;
}
#lists .list-name { min-width: 0; flex: 1; overflow-wrap: anywhere; }
#lists .list-progress {
  flex: none;
  min-width: 46px;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--canvas);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
#lists .list-row a:hover,
#lists .delete-list:hover { background: var(--hover); }
#lists .delete-list {
  display: grid;
  flex: none;
  place-items: center;
  width: 56px;
  min-height: 56px;
  margin: 6px 6px 6px 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
#lists .delete-list:hover { color: var(--danger); }
#lists .delete-list:disabled { opacity: .45; cursor: wait; }
#items label {
  display: flex;
  align-items: center;
  min-height: 62px;
  gap: 14px;
  padding: 15px 20px;
  cursor: pointer;
  overflow-wrap: anywhere;
}
#items label:hover { background: var(--hover); }
#items input {
  appearance: none;
  display: grid;
  flex: none;
  place-items: center;
  width: 23px;
  height: 23px;
  margin: 0;
  border: 1.5px solid var(--muted);
  border-radius: 7px;
  background: var(--surface);
  cursor: pointer;
}
#items input:checked { border-color: var(--accent); background: var(--accent); }
#items input:checked::after {
  content: '';
  width: 10px;
  height: 6px;
  margin-top: -3px;
  border-left: 2px solid var(--tg-theme-button-text-color, #fff);
  border-bottom: 2px solid var(--tg-theme-button-text-color, #fff);
  transform: rotate(-45deg);
}
#items input:checked + span { color: var(--muted); text-decoration: line-through; }
#items input:disabled { opacity: .55; cursor: wait; }
#error { margin: 16px 2px 0; color: var(--danger); font-size: 14px; }
#error:empty { display: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
@media (max-width: 390px) {
  main { padding: 24px 16px calc(24px + env(safe-area-inset-bottom)); }
}
@media (prefers-reduced-motion: no-preference) {
  #lists .list-row a, #lists .delete-list, #items label { transition: background-color .16s ease, color .16s ease; }
}