:root {
  --bg: #0b1724;
  --panel: #12263a;
  --text: #e6eef6;
  --muted: #8aa3ba;
  --water: #1c4466;
  --water-hover: #2a5d88;
  --ship: #8b98a6;
  --ship-edge: #c2ccd6;
  --sunk: #5a2a2a;
  --hit: #ff5a4e;
  --miss: #9fc4e4;
  --ok: #3fbf7f;
  --bad: #d9534f;
  --accent: #f2b33d;
  --primary: #2f8fdd;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: radial-gradient(ellipse at top, #13314d 0%, var(--bg) 60%) fixed, var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  max-width: 960px;
  margin: 0 auto;
}

h1 { font-size: 1.4rem; margin: 0; letter-spacing: .02em; }
h2 { font-size: 1rem; margin: 0 0 8px; color: var(--muted); font-weight: 600; }

.room-info { font-size: .9rem; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.room-info b { color: var(--text); letter-spacing: .1em; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bad); display: inline-block; }
.dot.on { background: var(--ok); }

main { max-width: 960px; margin: 0 auto; padding: 0 16px 40px; }

.hidden { display: none !important; }

button {
  font: inherit;
  color: var(--text);
  background: #24425f;
  border: 1px solid #36597a;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
}
button:hover:not(:disabled) { background: #2d5276; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: var(--primary); border-color: #4aa3ea; font-weight: 600; }
button.primary:hover:not(:disabled) { background: #3a9ce9; }
button.big { font-size: 1.15rem; padding: 12px 24px; }

input {
  font: inherit;
  color: var(--text);
  background: #0e1f30;
  border: 1px solid #36597a;
  border-radius: 8px;
  padding: 8px 10px;
}

/* Aula */
#lobby { text-align: center; padding-top: 40px; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 520px; margin: 0; }
.join-form { display: flex; gap: 8px; }
.join-form input { width: 9em; text-transform: uppercase; letter-spacing: .15em; text-align: center; }
.rules { max-width: 560px; text-align: left; background: var(--panel); border-radius: 10px; padding: 10px 16px; }
.rules summary { cursor: pointer; font-weight: 600; }
.rules li { margin: 6px 0; color: var(--muted); }

/* Jakolinkki */
.share { background: var(--panel); border: 1px dashed var(--accent); border-radius: 10px; padding: 12px 14px; margin-bottom: 14px; }
.share-row { display: flex; gap: 8px; margin-top: 6px; }
.share-row input { flex: 1; min-width: 0; }

/* Tila */
.status {
  background: var(--panel);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 16px;
  min-height: 3.2em;
  /* Vuoro ja edellisen laukauksen tulos pysyvät näkyvissä vieritettäessä. */
  position: sticky;
  top: 0;
  z-index: 5;
}
.status .main { font-weight: 600; font-size: 1.1rem; }
.status .sub { color: var(--muted); font-size: .95rem; }
.status.turn { box-shadow: 0 0 0 2px var(--accent) inset; }
.status.win { box-shadow: 0 0 0 2px var(--ok) inset; }
.status.lose { box-shadow: 0 0 0 2px var(--bad) inset; }

/* Laudat */
.boards { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; }
.board-wrap { flex: 1 1 340px; max-width: 440px; }

.board {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  gap: 2px;
  user-select: none;
  touch-action: manipulation;
}
.label { display: flex; align-items: center; justify-content: center; font-size: .75rem; color: var(--muted); aspect-ratio: 1; }

.cell {
  aspect-ratio: 1;
  background: var(--water);
  border-radius: 3px;
  position: relative;
  transition: background .12s;
}
.cell.ship { background: var(--ship); box-shadow: inset 0 0 0 1px var(--ship-edge); }
.cell.ship.picked { background: #b7c6d4; }
.cell.sunk { background: var(--sunk); box-shadow: inset 0 0 0 1px #a04a4a; }
.cell.reveal { background: transparent; box-shadow: inset 0 0 0 2px var(--ship); }
.cell.preview { background: rgba(63, 191, 127, .75); }
.cell.preview.bad { background: rgba(217, 83, 79, .75); }

.board.placing .cell { cursor: pointer; }
.board.active .cell:not(.hit):not(.miss):not(.sunk) { cursor: crosshair; }
.board.active .cell:not(.hit):not(.miss):not(.sunk):hover { background: var(--water-hover); box-shadow: inset 0 0 0 2px var(--accent); }
.board.active { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

.cell.miss::after {
  content: "";
  position: absolute;
  inset: 36%;
  border-radius: 50%;
  background: var(--miss);
}
.cell.hit::after {
  content: "✕";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--hit);
  font-weight: 900;
  font-size: clamp(12px, 3.2vw, 22px);
}
.cell.last { animation: pulse 1s ease-out 2; outline: 2px solid var(--accent); z-index: 1; }
@keyframes pulse {
  0% { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* Laivastolistat */
.fleet { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.fleet li {
  font-size: .85rem;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: 6px;
}
.fleet .pips { display: inline-flex; gap: 2px; }
.fleet .pips i { width: 8px; height: 8px; background: var(--ship); border-radius: 2px; }
.fleet li.sunk { text-decoration: line-through; color: var(--muted); }
.fleet li.sunk .pips i { background: var(--hit); }
.fleet li.selectable { cursor: pointer; }
.fleet li.selectable:hover { border-color: #36597a; }
.fleet li.placed { opacity: .55; }
.fleet li.selected { border-color: var(--accent); opacity: 1; }

.controls { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 20px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  background: #26405a;
  border: 1px solid #36597a;
  padding: 10px 16px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 520px) {
  h1 { font-size: 1.15rem; }
  .boards { gap: 18px; }
  /* Mobiilissa ammuttava ruudukko ylimmäksi pelin aikana. */
  #enemy-wrap { order: -1; }
}