:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #0f766e;
  --danger: #dc2626;
  --border: #e2e8f0;
  --todo: #64748b;
  --doing: #2563eb;
  --done: #16a34a;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

button, input, select, textarea { font: inherit; color: inherit; }

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  background: transparent;
}

.primary { background: var(--primary); color: #fff; font-weight: 600; }
.ghost { background: transparent; color: var(--muted); }
.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); width: 100%; margin-top: 24px; }
.big { padding: 16px 24px; font-size: 1.1rem; width: 100%; }

[hidden] { display: none !important; }

/* ---------- Home ---------- */

#home {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.home-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 24px;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 4px 20px rgb(0 0 0 / 0.06);
}

.home-card p { color: var(--muted); line-height: 1.5; }

/* ---------- Top bar & tabs ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: calc(env(safe-area-inset-top) + 10px) 12px 10px;
  background: var(--primary);
  color: #fff;
}

.topbar h1 { font-size: 1.15rem; margin: 0; flex: 1; }
.topbar select {
  background: rgb(255 255 255 / 0.15);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 8px;
}
.topbar select option { color: var(--text); }
.topbar .ghost { color: #fff; font-size: 1.2rem; padding: 6px 10px; }

.tabs {
  position: sticky;
  top: calc(env(safe-area-inset-top) + 58px);
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.tab {
  border-radius: 0;
  padding: 12px 4px;
  font-size: 0.85rem;
  color: var(--muted);
  border-bottom: 3px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.tab .count { font-weight: 700; font-size: 1rem; }
.tab.active { color: var(--text); font-weight: 600; border-bottom-color: var(--accent); }

/* ---------- Columns & cards ---------- */

.columns { padding: 12px 12px 100px; }
.column { display: none; }
.column.active { display: block; }
.column h2 { display: none; }

.card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--surface);
  border-radius: var(--radius);
  border-left: 5px solid var(--accent);
  padding: 14px;
  margin-bottom: 10px;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.06);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.next-status {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ---------- Drag & drop ---------- */

.card.dragging { opacity: 0.3; }
.ghost-card {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  pointer-events: none;
  margin: 0;
  box-shadow: 0 12px 28px rgb(0 0 0 / 0.25);
  rotate: 2deg;
}
.is-dragging .tab { background: #f8fafc; }
.tab.drop-target { background: var(--accent) !important; color: #fff; }
.column.drop-target { outline: 3px dashed var(--accent); outline-offset: -3px; }

/* ---------- Board creation & people ---------- */

#create-form { text-align: left; width: 100%; }
#create-form h1 { text-align: center; font-size: 1.4rem; }
.emoji-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.emoji-picker button { font-size: 1.5rem; padding: 6px 10px; border: 2px solid var(--border); }
.emoji-picker button.active { border-color: var(--primary); background: #ccfbf1; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: #ccfbf1;
  color: var(--primary);
  border-radius: 99px;
  padding: 4px 4px 4px 12px;
  font-weight: 600;
  font-size: 0.95rem;
}
.chip button { padding: 4px 8px; color: var(--primary); }
.button-link { display: block; text-decoration: none; border-radius: 10px; box-sizing: border-box; }
.topbar h1 { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Admin ---------- */

.admin-body { padding: 16px; max-width: 800px; margin: 0 auto; }
.admin-list { list-style: none; padding: 0; }
.admin-list li { background: var(--surface); border-radius: var(--radius); padding: 14px; margin-bottom: 10px; }
.admin-list a { font-weight: 700; color: var(--primary); font-size: 1.05rem; }
.admin-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.admin-delete { color: var(--danger); border: 1px solid var(--danger); padding: 6px 12px; font-size: 0.85rem; flex-shrink: 0; }
.admin-meta { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }
.admin-titles { font-size: 0.9rem; margin-top: 6px; }

.card-title { font-weight: 600; margin-bottom: 8px; word-break: break-word; }
.meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 0.8rem; color: var(--muted); }
.badge { background: #ccfbf1; color: var(--primary); padding: 2px 8px; border-radius: 99px; font-weight: 600; }
.due, .progress { padding: 2px 6px; }
.overdue { color: var(--danger); font-weight: 600; }
.complete { color: var(--done); font-weight: 600; }
.empty { color: var(--muted); text-align: center; padding: 40px 0; }

.status-todo { --accent: var(--todo); }
.status-doing { --accent: var(--doing); }
.status-done { --accent: var(--done); }

.fab {
  position: fixed;
  right: 20px;
  bottom: calc(env(safe-area-inset-bottom) + 20px);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  box-shadow: 0 6px 16px rgb(15 118 110 / 0.4);
}

/* ---------- Editor ---------- */

dialog {
  border: 0;
  padding: 0;
  width: 100%;
  max-width: 100%;
  height: 100dvh;
  max-height: 100dvh;
  margin: 0;
  background: var(--surface);
}

dialog::backdrop { background: rgb(0 0 0 / 0.4); }

#task-form { display: flex; flex-direction: column; height: 100%; }

.sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(env(safe-area-inset-top) + 8px) 8px 8px;
  border-bottom: 1px solid var(--border);
}

.sheet-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 16px calc(env(safe-area-inset-bottom) + 24px);
}

label, .field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
}

label input, label select, label textarea, .add-item input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text);
}

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.segmented { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.segmented button {
  border: 2px solid var(--border);
  color: var(--text);
  font-weight: 500;
}
.segmented button.active { border-color: var(--accent); background: var(--accent); color: #fff; }

.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--border); }
.checklist input[type="checkbox"] { width: 22px; height: 22px; accent-color: var(--primary); flex-shrink: 0; }
.checklist .item-text { flex: 1; border: 0; padding: 12px 4px; font-size: 1rem; color: var(--text); background: transparent; }
.checklist input:checked + .item-text { text-decoration: line-through; color: var(--muted); }

.add-item { display: flex; gap: 8px; margin-top: 8px; }
.add-item .ghost { color: var(--primary); font-weight: 600; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 96px);
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 10px 18px;
  border-radius: 99px;
  font-size: 0.9rem;
  z-index: 10;
}

/* ---------- Desktop ---------- */

@media (min-width: 900px) {
  .tabs { display: none; }
  .next-status { display: none; }
  .columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 16px 16px 100px;
  }
  .column { display: block; background: #e2e8f0; border-radius: var(--radius); padding: 10px; }
  .column h2 { display: block; font-size: 0.95rem; margin: 4px 4px 12px; border-left: 4px solid var(--accent); padding-left: 8px; }
  dialog {
    max-width: 560px;
    height: auto;
    max-height: 90dvh;
    margin: auto;
    border-radius: var(--radius);
  }
}