:root {
  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --page: #101916;
  --surface: #192620;
  --input: #101b15;
  --text: #e6eee8;
  --muted: #a8b9ae;
  --border: #40574a;
  --input-border: #617a69;
  --accent: #a6d6b5;
  --accent-hover: #bce8c9;
  --on-accent: #12291b;
  --focus: #f0bd70;
  --danger: #ffc0ac;
  --danger-surface: #3a2520;
  color: var(--text);
  background: var(--page);
}
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(ellipse at 90% 0%, #213d2e 0, transparent 55%); min-height: 100vh; }
.workspace { width: min(100% - 40px, 720px); margin: auto; padding: 70px 0 30px; }
.eyebrow { font-size: .7rem; font-weight: 750; letter-spacing: .16em; color: var(--accent); margin: 0 0 28px; }
h1 { font-size: clamp(2.9rem, 8vw, 4.5rem); line-height: 1.04; font-weight: 550; letter-spacing: -.055em; margin: 0; }
.intro { color: var(--muted); margin: 22px 0 36px; line-height: 1.6; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 30px; box-shadow: 0 12px 40px #00000033; }
.card-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 24px; }
h2 { font-size: 1.2rem; margin: 0; letter-spacing: -.03em; }
#count { color: var(--muted); font-size: .8rem; }
label { font-weight: 600; font-size: .85rem; display: block; margin-bottom: 8px; }
.add-row { display: flex; gap: 8px; }
input, button { font: inherit; }
input[type=text], input:not([type]) { min-width: 0; flex: 1; border: 1px solid var(--input-border); background: var(--input); border-radius: 9px; padding: 12px; color: inherit; }
input::placeholder { color: var(--muted); opacity: 1; }
button { cursor: pointer; border: 0; border-radius: 9px; padding: 12px 16px; background: var(--accent); color: var(--on-accent); font-weight: 650; }
button:hover { background: var(--accent-hover); }
button span { margin-left: 10px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
button:disabled, input:disabled { cursor: wait; opacity: .6; }
#todos { list-style: none; padding: 0; margin: 24px 0 0; }
.todo { display: flex; align-items: center; gap: 13px; padding: 16px 0; border-top: 1px solid var(--border); }
.todo input { accent-color: var(--accent); width: 21px; height: 21px; margin: 0; flex-shrink: 0; cursor: pointer; }
.todo label { flex: 1; font-weight: 450; font-size: .95rem; margin: 0; overflow-wrap: anywhere; line-height: 1.5; cursor: pointer; }
.todo.completed label { text-decoration: line-through; color: var(--muted); }
.delete { background: transparent; color: var(--danger); font-size: .8rem; padding: 9px; }
.delete:hover { background: var(--danger-surface); }
#status { text-align: center; color: var(--muted); font-size: .9rem; padding: 28px 5px 6px; line-height: 1.6; }
#error { background: var(--danger-surface); color: var(--danger); border-radius: 8px; padding: 12px; margin-top: 16px; overflow-wrap: anywhere; }
#retry { margin-top: 12px; }
[hidden] { display: none !important; }
footer { text-align: center; font-size: .75rem; color: var(--muted); padding-top: 24px; }
@media (max-width: 480px) { .workspace { width: calc(100% - 28px); padding-top: 40px; } .card { padding: 22px 18px; } .add-row { flex-wrap: wrap; } .add-row input { flex-basis: 100%; } .add-row button { width: 100%; } }