/* =========================
   Dark TODO – Global styles
   ========================= */

   :root {
    --bg:#0f1115;
    --panel:#151923;
    --muted:#98a2b3;
    --text:#e6eaf2;
    --brand:#7aa2ff;
    --accent:#22c55e;
    --danger:#ef4444;
    --border:#232939;
  }
  
  * { box-sizing: border-box; }
  html, body { height: 100%; }
  body.dark {
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  a { color: var(--brand); text-decoration: none; }
  a:hover { text-decoration: underline; }
  
  /* Layout */
  .container { max-width: 900px; margin: 40px auto; padding: 0 16px; }
  
  .topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 16px; background:#0b0e13; border-bottom:1px solid var(--border);
    position: sticky; top: 0; z-index: 10;
  }
  .brand { font-weight: 700; }
  .link { color: var(--muted); }
  .muted { color: var(--muted); }
  .small { font-size: 12px; }
  
  /* Cards & grid */
  .card {
    background: var(--panel);
    border:1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    margin: 12px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }
  .card.narrow { max-width: 420px; margin: 80px auto; }
  
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
  }
  
  .alert {
    background:#1e293b; border:1px solid #324559; color:#ffb4b4;
    padding:10px; border-radius:10px; margin:8px 0;
  }
  
  /* Forms & controls */
  .row { display:flex; gap:8px; align-items:center; flex-wrap: wrap; }
  label { display:flex; flex-direction:column; gap:6px; margin:6px 0; }
  
  input, button {
    border:1px solid var(--border);
    background:#0e121a;
    color:var(--text);
    padding:10px 12px;
    border-radius:12px;
    outline: none;
  }
  input::placeholder { color: #6b7280; }
  
  input.grow { flex: 1; }
  
  button.btn {
    background: var(--brand);
    border-color:#2b3b66;
    color:#0b0e13;
    cursor:pointer;
    font-weight:600;
  }
  button.btn.alt { background:#1f2937; color:var(--text); }
  
  /* Icon small button (delete on card) */
  .icon-btn {
    background:#1f2937; border-color:#4b5563; color:#ffb4b4;
    padding:6px 10px; border-radius:10px; cursor:pointer;
  }
  @media (hover:hover) { .icon-btn:hover { filter: brightness(1.1); } }
  
  /* Task cards */
  .task { display: block; }
  .task-head { display:flex; justify-content:space-between; align-items:center; gap: 8px; }
  .badge {
    background:#1f2937; border:1px solid var(--border);
    padding:2px 8px; border-radius:999px; font-size:12px; color:var(--muted);
  }
  .task .task-title { color: var(--text); text-decoration: none; }
  .task .task-title:hover { text-decoration: underline; }
  .task .right { display:flex; gap:8px; align-items:center; }
  
  /* Progress */
  .progress {
    height:10px; background:#0e121a;
    border:1px solid var(--border); border-radius:999px; overflow:hidden;
    margin:8px 0;
  }
  .progress.big { height:16px; }
  .progress > span {
    display:block; height:100%;
    background: linear-gradient(90deg, var(--accent), #58ffc7);
  }
  
  /* Subtasks list */
  ul.subtasks { list-style:none; padding:0; margin:12px 0; }
  .subtask { padding:10px 8px; border-bottom:1px dashed var(--border); }
  .subtask:last-child { border-bottom:none; }
  .subtasks.readonly .subtask { display:flex; gap:10px; align-items:center; }
  .subtasks.readonly .subtask.done { opacity:.7; }
  .check { width:20px; display:inline-block; }
  
  /* Bigger checkboxes for touch */
  input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--accent); }
  
  /* Danger button */
  .danger-btn { background: var(--danger); border-color:#7f1d1d; color:#fff; }
  
  /* Readonly input ellipsis */
  input[readonly] { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  
  /* ============== Add Task form (desktop & mobile) ============== */
  /* Markup uses: <form class="row add-task"> with inputs .title, .desc and .add-btn */
  .add-task .title { flex: 2 1 260px; min-width: 180px; }
  .add-task .desc  { flex: 3 1 340px; min-width: 200px; }
  .add-task .add-btn { flex: 0 0 auto; white-space: nowrap; }
  .add-task input { width: 100%; }
  
  /* ======================= Responsive tweaks ===================== */
  
  /* Tablets & small laptops */
  @media (max-width: 960px) {
    .container { max-width: 100%; padding: 0 12px; margin: 24px auto; }
    .card { border-radius: 14px; padding: 14px; margin: 10px 0; }
    .grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .topbar { padding: 12px; }
    .progress.big { height: 14px; }
  }
  
  /* Phones */
  @media (max-width: 640px) {
    /* Topbar stacks into two rows */
    .topbar { flex-wrap: wrap; gap: 8px; }
    .topbar .brand { width: 100%; }
    .topbar nav { width: 100%; display: flex; gap: 10px; justify-content: space-between; }
  
    .container { padding: 0 10px; margin: 18px auto; }
  
    .grid { grid-template-columns: 1fr; gap: 10px; }
    .card { padding: 12px; }
  
    /* General form rows go vertical */
    .row { flex-direction: column; align-items: stretch; gap: 10px; }
    input.grow, .row .btn, .row .btn.alt { width: 100%; }
  
    /* Add Task form forced full-width items */
    .add-task .title, .add-task .desc, .add-task .add-btn { flex: 1 1 100%; }
    .add-task .add-btn { padding: 12px 14px; }
  
    /* More comfortable sizes */
    button.btn { padding: 12px 14px; border-radius: 12px; }
    .icon-btn { padding: 10px 12px; }
    input[type="checkbox"] { width: 22px; height: 22px; }
  
    /* Typography */
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.2rem; }
    h3 { font-size: 1.05rem; }
    body.dark { font-size: 15px; }
  
    .subtask { padding: 10px 6px; }
    .subtasks.readonly .subtask { gap: 8px; }
    .check { width: 18px; }
  
    input[readonly] { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  
    form.row { margin-top: 8px; }
  }
  
  /* Very narrow phones */
  @media (max-width: 360px) {
    .topbar nav { flex-direction: column; align-items: flex-start; gap: 6px; }
    .progress { height: 8px; }
    .progress.big { height: 12px; }
  }