:root {
  /* Palette sampled from the PKBIO logo */
  --teal: #0aa58f;
  --teal-dark: #078270;
  --blue: #5b77bc;
  --navy: #1c2b7a;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #1b2240;
  --muted: #6a7394;
  --line: #e1e6f3;
  --danger: #c0392b;
  --warn: #b7791f;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11162e; --surface: #1a2142; --text: #eef1fb; --muted: #9aa5cf; --line: #2c3566;
    --teal: #1cc0a9; --blue: #8da4e3; --navy: #8da4e3; --danger: #ff7b6b; --warn: #f0b95a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--surface); border-bottom: 3px solid var(--teal); }
.top-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 8px; padding-bottom: 8px; }
.logo { height: 72px; width: auto; display: block; }
@media (prefers-color-scheme: dark) { .logo { background: #fff; border-radius: 8px; padding: 2px; } }
.auth-area { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.who { color: var(--muted); font-size: 14px; }
.badge { background: var(--navy); color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 99px; margin-left: 6px; text-transform: uppercase; letter-spacing: .04em; }
@media (prefers-color-scheme: dark) { .badge { color: #11162e; } }

main { padding-top: 20px; padding-bottom: 48px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.card h2 { margin: 0 0 8px; font-size: 18px; color: var(--navy); }
.hint { color: var(--muted); text-align: center; }
.muted { color: var(--muted); }

input, button { font: inherit; }
input[type=text], input[type=date], input:not([type]), input[type=password] {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--text); min-width: 0;
}
input:focus-visible, button:focus-visible { outline: 3px solid var(--blue); outline-offset: 1px; }

.btn {
  padding: 9px 16px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); cursor: pointer; min-height: 40px;
}
.btn:hover { border-color: var(--blue); }
.btn.primary { background: var(--teal); border-color: var(--teal); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--teal-dark); border-color: var(--teal-dark); }
@media (prefers-color-scheme: dark) { .btn.primary { color: #0b1020; } }
.btn.danger { color: var(--danger); }
.btn.success { background: transparent; border-color: #1a9d4a; color: #1a9d4a; font-weight: 600; }
.btn.success:hover { background: color-mix(in srgb, #1a9d4a 14%, transparent); border-color: #1a9d4a; }
.btn.danger { background: transparent; }
.btn.danger:hover { background: color-mix(in srgb, var(--danger) 14%, transparent); border-color: var(--danger); }
.btn.danger-solid { background: var(--danger); border-color: var(--danger); color: #fff; font-weight: 600; }
@media (prefers-color-scheme: dark) { .btn.danger-solid { color: #0b1020; } .btn.success { border-color: #3ecf72; color: #3ecf72; } .btn.success:hover { background: color-mix(in srgb, #3ecf72 14%, transparent); border-color: #3ecf72; } }
.btn.small { padding: 4px 10px; min-height: 32px; font-size: 14px; }
.link { background: none; border: 0; color: var(--blue); cursor: pointer; padding: 4px 0; text-decoration: underline; }

.date-field { display: inline-flex; align-items: center; gap: 4px; padding: 0 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); }
.date-field:focus-within { outline: 3px solid var(--blue); outline-offset: 1px; }
.date-field input.date-part { border: 0; background: transparent; padding: 10px 2px; text-align: center; width: 36px; flex: 0 0 auto; color: var(--text); }
.date-field input.date-part:last-child { width: 58px; }
.date-field { flex: 0 0 auto; }
.date-field input.date-part:focus-visible { outline: 0; }
.date-sep { color: var(--muted); }


dialog { border: 0; border-radius: var(--radius); padding: 0; background: var(--surface); color: var(--text); width: min(360px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(10, 15, 40, .5); }
.auth-form { padding: 20px; display: grid; gap: 12px; }
.auth-form h3 { margin: 0; color: var(--navy); }
.auth-form label { display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
.auth-form input { color: var(--text); }
.row { display: flex; gap: 8px; }
.error { color: var(--danger); margin: 0; min-height: 1.5em; font-size: 14px; }

.toast { position: fixed; left: 50%; bottom: 20px; transform: translate(-50%, 20px); background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 8px; opacity: 0; pointer-events: none; transition: .2s; max-width: calc(100vw - 32px); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
@media (prefers-color-scheme: dark) { .toast { color: #11162e; } }
@media (prefers-reduced-motion: reduce) { .toast { transition: none; } }
@media (max-width: 480px) { .logo { height: 56px; } }

/* ---- Quadro kanban ---- */
.board {
  display: flex; gap: 16px; align-items: flex-start;
  overflow-x: auto; padding: 4px 16px 32px; scroll-snap-type: x proximity;
}
.column {
  flex: 0 0 320px; scroll-snap-align: start;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px; display: flex; flex-direction: column; gap: 10px;
}
.column.mine { border-color: var(--teal); box-shadow: 0 0 0 1px var(--teal); }
.col-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.col-head h2 { margin: 0; font-size: 17px; color: var(--navy); overflow-wrap: anywhere; }
.badge.you { background: var(--teal); }
.count { font-size: 13px; color: var(--muted); white-space: nowrap; }
.add-form { display: grid; gap: 8px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.add-form > input[type=text] { width: 100%; }
.add-form .date-field, .edit-row .date-field { justify-self: start; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.task { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; display: grid; gap: 8px; }
.task .title { overflow-wrap: anywhere; }
.task.done .title { text-decoration: line-through; color: var(--muted); }
.task.done { opacity: .8; }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.due { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 99px; background: color-mix(in srgb, var(--blue) 15%, transparent); color: var(--navy); white-space: nowrap; }
.due.overdue { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }
.due.today { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.due.done { background: transparent; color: var(--muted); }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.edit-row { display: grid; gap: 8px; }
.edit-row > input[type=text] { width: 100%; }
.empty { color: var(--muted); font-size: 14px; text-align: center; padding: 12px 0; }
@media (max-width: 480px) { .column { flex-basis: 86vw; } }
.col-head { flex-wrap: wrap; }
.small-link { font-size: 12px; margin-left: auto; padding: 0; color: var(--muted); }
.small-link:hover { color: var(--blue); }
.btn.icon { font-size: 18px; line-height: 1; padding: 4px 10px; }
dialog.wide { width: min(560px, calc(100vw - 32px)); }
.user-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 50vh; overflow: auto; }
.user-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); }
.user-info { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge.pending { background: var(--warn); color: #fff; text-transform: none; letter-spacing: 0; margin-left: 0; }
.auth-form input[readonly] { opacity: .7; }
.invite-box { display: grid; gap: 8px; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); }
.invite-box p { margin: 2px 0 0; font-size: 13px; }
.invite-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.invite-code { font: 600 18px/1 ui-monospace, Consolas, monospace; letter-spacing: .12em; padding: 8px 12px; border-radius: 8px; background: var(--surface); border: 1px dashed var(--teal); user-select: all; }