/* ====== Design tokens ====== */
:root{
  --bg: #0f1220;
  --bg-alt: #121630;
  --card: #171b3a;
  --card-2: #1b2045;
  --text: #e6e8f0;
  --muted: #b5bdd6;
  --accent: #6ea8ff;
  --ok: #10b981;
  --warn: #f59e0b;
  --danger: #ef4444;
  --border: rgba(255,255,255,0.12);
  --shadow: 0 6px 20px rgba(0,0,0,0.35);
  --radius: 16px;
}

/* ====== Base ====== */
*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 800px at 20% -10%, #1d224a, transparent),
              radial-gradient(1000px 700px at 120% 10%, #1b2045, transparent),
              var(--bg);
  background-repeat: no-repeat;
  min-height: 100vh;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
}

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

.visually-hidden{ position:absolute!important; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.hidden{ display: none !important; }

/* ====== Header ====== */
.app-header{
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  background: rgba(18, 22, 48, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.app-header h1{
  margin: 0; font-size: 18px; letter-spacing: .2px; font-weight: 700;
}
.header-actions{
  margin-left: auto;
  display: flex; flex-wrap: wrap; gap: 8px;
}

/* ====== Controls ====== */
button, input, select{ font: inherit; color: inherit; }
button{
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 10px 12px; border-radius: 12px;
  background: var(--card-2); border: 1px solid var(--border);
  cursor: pointer;
}
button:hover{ background: #20265b; }
button.icon{ padding: 6px 8px; min-width: 32px; }
button.flat{ background: transparent; border-color: var(--border); }
button.primary{ background: var(--accent); border-color: transparent; color: #05142e; font-weight: 700; }
button.ok{ background: var(--ok); border-color: transparent; color: #052b22; font-weight: 700; }
button.danger{ background: rgba(239,68,68,.12); color: #ff7a7a; border-color: rgba(239,68,68,.35); }
button.danger:hover{ background: rgba(239,68,68,.2); }
button.ghost{ background: transparent; border: 1px solid var(--border); color: var(--muted); }
button.ghost:hover{ background: rgba(255,255,255,.04); color: var(--text); }

/* Dropdown */
select.ghost{
  appearance: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 12px;
}
select.ghost:hover{ background: rgba(255,255,255,.04); color: var(--text); }

/* ====== App layout ====== */
.app{ max-width: 980px; margin: 18px auto 64px; padding: 0 16px; }
.title-row{ display: flex; align-items: center; gap: 12px; margin: 8px 0 18px; }
.app-title-input{
  width: 100%;
  font-size: 22px; font-weight: 800; letter-spacing: .2px;
  color: var(--text);
  background: transparent;
  border: 1px dashed transparent;
  padding: 8px 10px; border-radius: 12px;
}
.app-title-input[readonly]{ opacity: .85; }
.app-title-input:focus{ outline: none; border-color: var(--border); background: rgba(255,255,255,.03); }

/* ====== Tag filter bar (injected above groups) ====== */
#tag-filter-bar{ display: block; }
#tag-filter-bar .ghost[aria-pressed="true"]{
  border-color: var(--accent);
  color: var(--text);
}

/* ====== Groups ====== */
.groups{ display: grid; gap: 14px; }
.group{
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 6px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.group-header{
  display: grid;
  grid-template-columns: auto auto 1fr auto auto auto;
  align-items: center; gap: 8px;
  padding: 10px 10px;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--border);
}
.group .master{ display: inline-flex; align-items: center; }
.group .master input[type="checkbox"]{ width: 18px; height: 18px; }

.group-title{
  font-size: 1.05rem;
  font-weight: 700;              /* <- headings bold */
  color: var(--text);
  background: transparent;
  border: 1px dashed transparent;
  padding: 6px 8px; border-radius: 10px;
  min-width: 120px;
}
.group-title[readonly]{ opacity: .9; }
.group-title:focus{ outline: none; border-color: var(--border); background: rgba(255,255,255,.03); }

.group-actions{ display: inline-flex; align-items: center; gap: 8px; }
.counter{ font-size: 12px; color: var(--muted); padding: 4px 8px; border: 1px solid var(--border); border-radius: 999px; }
.badge-complete{
  font-size: 12px; font-weight: 800; letter-spacing: .2px;
  color: #063a2d; background: rgba(16,185,129,.9);
  padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(5,150,105,.75);
}
.sort-buttons{ display: inline-flex; gap: 6px; }
.collapse-toggle{
  background: transparent; border: 1px solid var(--border);
  width: 34px; height: 34px; border-radius: 10px;
}
.collapse-toggle .chev{ display: inline-block; transition: transform .18s ease; }
.group[aria-expanded="true"] .chev{ transform: rotate(90deg); }

.group-body{ padding: 8px 10px 12px; }
.group.collapsed .group-body{ display: none; }
.group-color-wrap{ display: inline-flex; align-items: center; }
.group-color{ width: 28px; height: 28px; padding: 0; border: none; background: transparent; border-radius: 6px; cursor: pointer; box-shadow: inset 0 0 0 1px var(--border); }

/* ====== Items ====== */
.items{ list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.item{
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center; gap: 8px;
  padding: 8px 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255,255,255,.02);
  cursor: pointer;
}
.item .item-text,
.item button,
.item input[type="checkbox"]{ cursor: auto; }
.item.done{ opacity: .85; }
.item.done .item-text{ text-decoration: line-through; color: #9fb2d9; }

.item .item-text{
  width: 100%;
  background: transparent; color: var(--text);
  border: 1px dashed transparent;
  padding: 6px 8px; border-radius: 8px;
}
.item .item-text[readonly]{ opacity: .95; }
.item .item-text:focus{ outline: none; border-color: var(--border); background: rgba(255,255,255,.03); }

/* Note items (no checkbox) */
.item.note{ grid-template-columns: auto 1fr auto auto; background: rgba(255,255,255,.025); border-style: dashed; }
.item.note .note-icon{
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; min-width: 18px;
  font-size: 16px; line-height: 1;
  opacity: .85;
  border-radius: 50%;
  border: 1px solid var(--border);
  margin-right: 2px;
}
.item.note .item-text{ font-style: italic; }

.type-toggle{
  display: inline-flex; align-items:center; justify-content:center;
  padding: 6px 8px; border:1px solid var(--border);
  border-radius:8px; cursor:pointer;
  background: transparent;
}
.type-toggle:hover{ background: rgba(255,255,255,.04); }

/* Drag over hints */
.group.drag-over-top,
.item.drag-over-top{ box-shadow: inset 0 3px 0 0 var(--accent); }
.group.drag-over-bottom,
.item.drag-over-bottom{ box-shadow: inset 0 -3px 0 0 var(--accent); }

/* ====== Tags (view mode pills + editor) ====== */
.tags-pills{
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;           /* spacing between pills */
  margin-left: 8px;   /* breathing room after counter */
  vertical-align: middle;
}
.tag-pill{
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.2;
}
.tags-editor{ margin: 6px 0 10px; }
.tags-editor .tags-input{
  width: 100%;
  background: transparent; color: var(--text);
  border: 1px dashed var(--border);
  padding: 6px 8px; border-radius: 8px;
}
.tags-editor .tags-input:focus{
  outline: none; border-color: var(--accent);
  background: rgba(255,255,255,.03);
}

/* ====== Empty state ====== */
.empty{
  display: grid; place-items: center; gap: 12px;
  padding: 32px; border: 1px dashed var(--border);
  border-radius: var(--radius); color: var(--muted);
  background: rgba(255,255,255,.02);
}

/* ====== FAB ====== */
.fab{
  position: fixed; right: 18px; bottom: 18px; z-index: 20;
  width: 56px; height: 56px; border-radius: 16px;
  font-size: 22px; font-weight: 700;
  background: var(--accent); color: #05142e; border: none;
  box-shadow: 0 10px 24px rgba(0,0,0,.45);
}
.fab:hover{ transform: translateY(-1px); }

/* ====== Mode logic ====== */
.read-only .edit-only{ display: none !important; }

/* ====== Responsive ====== */
@media (max-width: 720px){
  .group-header{ grid-template-columns: auto auto 1fr auto auto; grid-auto-flow: row; gap: 8px; }
  .header-actions{ gap: 6px; }
  .app{ margin-bottom: 84px; }
}