:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --accent-2: #3b82f6;
  --danger: #ef4444;
  --ring: rgba(59, 130, 246, 0.4);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  display: grid;
  place-items: start center;
  min-height: 100vh;
  padding: 32px 16px;
}

.app {
  width: 100%;
  max-width: 720px;
  background: var(--panel);
  border: 1px solid #1f2937;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
}

label { color: var(--muted); font-size: 14px; }

input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #374151;
  border-radius: 8px;
  background: #0b1220;
  color: var(--text);
  outline: none;
}
input[type="text"]:focus { border-color: var(--accent-2); box-shadow: 0 0 0 3px var(--ring); }

button {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #374151;
  background: #0b1220;
  color: var(--text);
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
.btn-primary { background: #0b1a33; border-color: var(--accent-2); }
.btn-accent { background: #0f2a1b; border-color: var(--accent); }
.btn-danger { background: #2a0f12; border-color: var(--danger); }

#todo { display: grid; gap: 10px; }
.todo-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 12px;
  border: 1px solid #1f2937;
  border-radius: 10px;
  background: #0b1220;
}

.todo-item h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
}

.muted { color: var(--muted); font-size: 12px; }