*, *::before, *::after { box-sizing: border-box; }
  [hidden] { display: none !important; }
  body { margin: 0; }
  img { max-width: 100%; }
  :root {
    color-scheme: dark;
    --night: #050b2e;
    --board: #0b1a6b;
    --board-hi: #1a2fa0;
    --tile-edge: #02061f;
    --gold: #f5c542;
    --gold-soft: #ffe08a;
    --ink: #e8ecff;
    --muted: #9aa6e0;
    --danger: #ff7a6b;
    --ok: #7be0a6;
    --display: "Russo One", "Arial Black", system-ui, sans-serif;
    --narrow: "PT Sans Narrow", "Arial Narrow", system-ui, sans-serif;
    --body: "PT Sans", system-ui, -apple-system, sans-serif;
  }
  html { background: var(--night); }
  body {
    background:
      radial-gradient(ellipse 120% 60% at 50% -10%, #1b2aa8 0%, transparent 60%),
      radial-gradient(ellipse 80% 50% at 50% 110%, #12208a 0%, transparent 70%),
      var(--night);
    color: var(--ink);
    font-family: var(--body);
    font-size: 16px;
    min-height: 100vh;
    min-height: 100dvh;
    padding-inline: max(16px, env(safe-area-inset-left, 0px));
    -webkit-text-size-adjust: 100%;
    padding-block: 32px 56px;
  }
  .wrap { max-width: 920px; margin-inline: auto; display: grid; gap: 32px; }

  header { display: grid; gap: 10px; text-align: center; justify-items: center; }
  .logo {
    font-family: var(--display);
    font-size: clamp(40px, 9vw, 76px);
    line-height: 1;
    letter-spacing: 0.04em;
    color: var(--gold);
    text-shadow: 0 0 18px rgba(245,197,66,.45), 0 3px 0 #8a5d00, 0 6px 14px rgba(0,0,0,.6);
    margin: 0;
    text-wrap: balance;
  }
  .sub {
    font-family: var(--narrow);
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--muted);
    font-size: 15px;
    margin: 0;
  }
  .host {
    margin: 0; font-family: var(--narrow); font-size: 18px; letter-spacing: .08em;
    text-transform: uppercase; color: var(--ink);
  }
  .host b { font-family: var(--display); color: var(--gold); letter-spacing: .04em; }
  .count {
    display: inline-flex; gap: 10px; align-items: baseline;
    font-family: var(--narrow); text-transform: uppercase; letter-spacing: .12em;
    color: var(--muted); font-size: 14px;
  }
  .count b {
    font-family: var(--display); color: var(--gold); font-size: 28px; letter-spacing: 0;
    font-variant-numeric: tabular-nums;
  }

  /* tile = board cell */
  .tile {
    background: linear-gradient(180deg, var(--board-hi) 0%, var(--board) 55%, #08145a 100%);
    border: 3px solid var(--tile-edge);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.08), 0 8px 24px rgba(0,0,0,.45);
  }

  form.tile { padding: 24px; display: grid; gap: 18px; }
  .form-title {
    font-family: var(--display); color: var(--gold); font-size: 20px; margin: 0;
    letter-spacing: .03em;
  }
  .fields { display: grid; gap: 14px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  @media (max-width: 820px) and (min-width: 601px) {
    .fields { grid-template-columns: 1fr 1fr; }
    .fields label:first-child { grid-column: 1 / -1; }
  }
  label { display: grid; gap: 6px; }
  label span {
    font-family: var(--narrow); text-transform: uppercase; letter-spacing: .14em;
    font-size: 13px; color: var(--muted);
  }
  input {
    font: 700 18px var(--body);
    color: var(--ink);
    background: rgba(2, 6, 31, .55);
    border: 2px solid #26379e;
    padding: 12px 14px;
    min-width: 0;
    width: 100%;
  }
  input::placeholder { color: #5d69a8; font-weight: 400; }
  input:focus-visible { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(245,197,66,.25); }
  .actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
  button {
    font-family: var(--display); font-size: 17px; letter-spacing: .05em;
    cursor: pointer; border: 3px solid var(--tile-edge);
  }
  .btn-main {
    background: linear-gradient(180deg, var(--gold-soft), var(--gold) 55%, #d49a10);
    color: #1a1200; padding: 12px 26px;
    box-shadow: 0 4px 0 #7a5200, 0 8px 18px rgba(0,0,0,.4);
  }
  .btn-main:hover { filter: brightness(1.06); }
  .btn-main:active { transform: translateY(2px); box-shadow: 0 2px 0 #7a5200; }
  .btn-main:disabled { filter: grayscale(.8) brightness(.7); cursor: not-allowed; transform: none; }
  button:focus-visible { outline: 3px solid var(--gold-soft); outline-offset: 2px; }
  .status { font-size: 15px; color: var(--muted); min-height: 1.3em; }
  .status.ok { color: var(--ok); }
  .status.err { color: var(--danger); }

  /* board of players */
  .board-head {
    display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px;
  }
  .board-head h2 { font-family: var(--display); color: var(--gold); font-size: 22px; margin: 0; }
  .note { font-size: 14px; color: var(--muted); }

  .players {
    display: grid; gap: 10px; list-style: none; margin: 0; padding: 0;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  .player {
    display: grid; gap: 8px; align-content: space-between;
    padding: 16px; min-height: 96px; text-align: center;
  }
  .player.me { border-color: var(--gold); }
  .nick {
    font-family: var(--display); font-size: 20px; color: var(--gold);
    text-shadow: 0 2px 0 rgba(0,0,0,.5);
    overflow-wrap: anywhere;
  }
  .tag {
    font-family: var(--narrow); font-size: 12px; letter-spacing: .16em;
    text-transform: uppercase; color: var(--ok);
  }
  .tag.ex { color: var(--muted); }
  .del-cell { display: grid; }
  .del-cell:empty { display: none; }
  .btn-del {
    background: transparent; color: var(--danger); border: 2px solid rgba(255,122,107,.5);
    font-family: var(--narrow); font-size: 14px; letter-spacing: .1em; text-transform: uppercase;
    padding: 8px 12px; width: 100%;
  }
  .btn-del:hover { background: rgba(255,122,107,.12); }
  .confirm { display: flex; gap: 6px; }
  .confirm button { flex: 1; }

  .empty {
    grid-column: 1 / -1;
    padding: 36px 20px; text-align: center; color: var(--muted);
    font-family: var(--narrow); font-size: 18px; letter-spacing: .06em;
  }

  /* phone */
  @media (max-width: 600px) {
    body { padding-block: 20px 40px; }
    .wrap { gap: 24px; }
    form.tile { padding: 18px 16px; gap: 14px; }
    .fields { grid-template-columns: 1fr; gap: 12px; }
    .actions { flex-direction: column; align-items: stretch; }
    .btn-main { width: 100%; padding-block: 14px; }
    .status { text-align: center; }
    .players { grid-template-columns: 1fr 1fr; gap: 8px; }
    .player { padding: 12px; min-height: 80px; }
    .nick { font-size: 18px; }
    .btn-del { padding-block: 10px; }
    .board-head h2 { font-size: 20px; }
    .sub { letter-spacing: .16em; font-size: 13px; }
  }
  @media (max-width: 340px) {
    .players { grid-template-columns: 1fr; }
  }

  @media (prefers-reduced-motion: no-preference) {
    .player.new { animation: flip .35s ease-out both; }
    @keyframes flip { from { transform: rotateX(70deg); opacity: .3; } to { transform: none; opacity: 1; } }
  }

  /* admin */
  .admin-table { width: 100%; border-collapse: separate; border-spacing: 0 8px; }
  .admin-wrap { overflow-x: auto; }
  .admin-table th {
    font-family: var(--narrow); text-transform: uppercase; letter-spacing: .14em;
    font-size: 13px; color: var(--muted); text-align: left; padding: 0 12px;
  }
  .admin-table td {
    background: var(--board); padding: 12px; border-block: 3px solid var(--tile-edge);
    font-family: var(--narrow); font-weight: 700; font-size: 17px; overflow-wrap: anywhere;
  }
  .admin-table td:first-child { border-left: 3px solid var(--tile-edge); font-family: var(--display); color: var(--gold); font-weight: 400; }
  .admin-table td:last-child { border-right: 3px solid var(--tile-edge); width: 1%; white-space: nowrap; }
  .chips { display: flex; flex-wrap: wrap; gap: 8px; }
  .chip {
    font-family: var(--narrow); font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
    font-size: 15px; padding: 8px 12px;
  }
  .chip b { color: var(--gold); margin-left: 6px; font-variant-numeric: tabular-nums; }
  .section-title { font-family: var(--display); color: var(--gold); font-size: 22px; margin: 0; }
  .login { display: flex; gap: 10px; flex-wrap: wrap; }
  .login input { flex: 1 1 220px; }