@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --ink: #edf6f7;
  --muted: #8da5ac;
  --faint: #58717a;
  --navy: #071521;
  --navy-2: #0b1d29;
  --panel: #102733;
  --panel-hi: #16323e;
  --line: #294653;
  --grid-line: #315766;
  --sea: #0c2634;
  --sea-hi: #123645;
  --signal: #f0c75e;
  --signal-dark: #bf9635;
  --hit: #ef645e;
  --miss: #85aab5;
  --good: #72c6a4;
  --cell: min(8.25vw, 38px);
  --shadow: 0 18px 60px rgb(0 0 0 / 28%);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--navy); }
body {
  margin: 0;
  min-height: 100svh;
  color: var(--ink);
  background:
    radial-gradient(circle at 74% 18%, rgb(35 77 90 / 22%), transparent 36rem),
    linear-gradient(rgb(255 255 255 / 1.2%) 1px, transparent 1px),
    var(--navy);
  background-size: auto, 100% 5rem, auto;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; }
button { touch-action: manipulation; }
button:focus-visible, input:focus-visible, a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  padding: env(safe-area-inset-top) max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: rgb(7 21 33 / 92%);
  backdrop-filter: blur(14px);
}
.home-link {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--muted);
  text-decoration: none;
  font-size: 25px;
}
.brand {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font: 700 21px/1 "Barlow Condensed", sans-serif;
  letter-spacing: .16em;
}
.brand-mark { display: flex; align-items: end; height: 18px; gap: 2px; transform: skewX(-18deg); }
.brand-mark i { display: block; width: 5px; background: var(--signal); }
.brand-mark i:nth-child(1) { height: 8px; }
.brand-mark i:nth-child(2) { height: 17px; }
.brand-mark i:nth-child(3) { height: 12px; }
.top-controls { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.sound-toggle {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.sound-toggle:hover { color: var(--signal); border-color: var(--line); }
.sound-toggle svg { width: 20px; height: 20px; overflow: visible; }
.sound-toggle path { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.sound-toggle .speaker { fill: currentColor; stroke: none; }
.sound-toggle .sound-slash { display: none; }
.sound-toggle.is-muted { color: var(--faint); }
.sound-toggle.is-muted .sound-waves { display: none; }
.sound-toggle.is-muted .sound-slash { display: block; color: var(--hit); }
.connection {
  min-width: 61px;
  padding: 5px 7px;
  border: 1px solid currentColor;
  border-radius: 2px;
  color: var(--good);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .12em;
  text-align: center;
}
.connection.is-offline { color: var(--faint); }

.app {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: clamp(24px, 5vw, 64px) max(16px, env(safe-area-inset-right)) calc(40px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
.loading-panel { min-height: 62svh; display: grid; place-content: center; justify-items: center; gap: 18px; color: var(--muted); font-size: 12px; letter-spacing: .08em; }
.radar { width: 74px; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; position: relative; background: linear-gradient(90deg, transparent 49%, var(--line) 50%, transparent 51%), linear-gradient(transparent 49%, var(--line) 50%, transparent 51%); }
.radar::after { content: ""; position: absolute; inset: 14px; border: 1px solid var(--line); border-radius: 50%; }
.radar span { position: absolute; left: 50%; top: 50%; width: 47%; height: 1px; background: var(--signal); transform-origin: left; animation: sweep 1.6s linear infinite; box-shadow: 10px -3px 12px var(--signal); }
@keyframes sweep { to { transform: rotate(360deg); } }

.welcome {
  min-height: calc(100svh - 128px);
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(300px, 420px);
  align-content: center;
  align-items: center;
  gap: clamp(30px, 7vw, 100px);
  position: relative;
}
.kicker { margin: 0 0 9px; color: var(--signal); font-size: 11px; font-weight: 600; letter-spacing: .18em; }
.hero-copy h1 {
  margin: 0;
  max-width: 650px;
  font: 800 clamp(68px, 12vw, 145px)/.73 "Barlow Condensed", sans-serif;
  letter-spacing: -.04em;
  text-transform: uppercase;
}
.lede { max-width: 520px; margin: 34px 0 0; color: var(--muted); font-size: clamp(13px, 1.5vw, 16px); line-height: 1.75; }
.command-card, .panel {
  border: 1px solid var(--line);
  background: rgb(16 39 51 / 90%);
  box-shadow: var(--shadow);
}
.command-card { padding: clamp(24px, 5vw, 40px); }
.card-heading { display: flex; align-items: center; gap: 16px; padding-bottom: 26px; margin-bottom: 26px; border-bottom: 1px solid var(--line); }
.step-number { color: var(--faint); font: 700 44px/1 "Barlow Condensed", sans-serif; }
.card-heading h2 { margin: 0; font: 700 29px/1 "Barlow Condensed", sans-serif; letter-spacing: .02em; text-transform: uppercase; }
.command-card label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .12em; }
.command-card input {
  width: 100%; height: 52px; padding: 0 14px; border: 1px solid var(--line); border-radius: 0; background: var(--navy-2); color: var(--ink); font-size: 16px;
}
.command-card input::placeholder { color: var(--faint); }
.primary-btn, .secondary-btn, .tab-btn {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
}
.primary-btn { width: 100%; margin-top: 16px; padding: 0 18px; background: var(--signal); color: #171b19; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.primary-btn:hover:not(:disabled) { background: #ffda76; }
.primary-btn:disabled { opacity: .38; cursor: not-allowed; }
.secondary-btn { padding: 0 17px; background: transparent; border-color: var(--line); color: var(--ink); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.secondary-btn:hover:not(:disabled) { border-color: var(--signal); color: var(--signal); }
.fine-print { margin: 16px 0 0; color: var(--faint); font-size: 10px; line-height: 1.5; }
.fleet-silhouette { position: absolute; left: 2%; bottom: 3%; width: min(48vw, 530px); height: 76px; opacity: .12; pointer-events: none; }
.fleet-silhouette .hull { position: absolute; left: 8%; right: 0; bottom: 20px; height: 25px; background: var(--ink); clip-path: polygon(0 0, 91% 0, 100% 38%, 93% 100%, 12% 100%); }
.fleet-silhouette .tower { position: absolute; left: 42%; bottom: 45px; width: 60px; height: 22px; background: var(--ink); }
.fleet-silhouette .gun { position: absolute; left: 53%; bottom: 62px; width: 110px; height: 5px; background: var(--ink); transform: rotate(-2deg); transform-origin: left; }
.fleet-silhouette .wake { position: absolute; left: 0; right: 0; bottom: 12px; border-top: 3px solid var(--ink); transform: skewX(-30deg); }

.game-shell { display: grid; gap: 22px; }
.mission-bar { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: end; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.mission-bar h1 { margin: 4px 0 0; font: 700 clamp(34px, 6vw, 58px)/.95 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.mission-meta { display: flex; gap: 8px; align-items: center; }
.phase-chip { padding: 7px 9px; border: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .1em; }
.phase-chip.is-live { color: var(--signal); border-color: var(--signal-dark); }

.lobby-grid { min-height: 55svh; display: grid; place-items: center; }
.lobby-card { width: min(520px, 100%); padding: clamp(24px, 5vw, 42px); text-align: center; }
.sonar { width: 128px; aspect-ratio: 1; margin: 0 auto 26px; border: 1px solid var(--line); border-radius: 50%; position: relative; }
.sonar::before, .sonar::after { content: ""; position: absolute; border: 1px solid var(--line); border-radius: 50%; inset: 22px; }
.sonar::after { inset: 44px; background: var(--signal); border: 0; box-shadow: 0 0 24px var(--signal); }
.sonar-line { position: absolute; top: 50%; left: 50%; width: 50%; height: 1px; background: var(--signal); transform-origin: left; animation: sweep 2s linear infinite; }
.lobby-card h2 { margin: 0; font: 700 35px/1 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.lobby-card > p { color: var(--muted); font-size: 12px; line-height: 1.7; }
.share-row { display: grid; grid-template-columns: 1fr auto; margin-top: 24px; }
.share-code { min-width: 0; height: 48px; display: flex; align-items: center; padding: 0 14px; overflow: hidden; border: 1px solid var(--line); background: var(--navy-2); color: var(--muted); font-size: 11px; white-space: nowrap; text-overflow: ellipsis; }
.share-row .secondary-btn { border-left: 0; }
.opponent-line { margin-top: 18px; color: var(--good); font-size: 11px; }

.setup-layout { display: grid; grid-template-columns: minmax(280px, 1fr) 320px; gap: clamp(22px, 4vw, 52px); align-items: start; }
.board-panel { min-width: 0; }
.board-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.board-heading h2 { margin: 0; font: 700 25px/1 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.board-heading p { margin: 0; color: var(--muted); font-size: 10px; }
.sea-board {
  display: grid;
  grid-template-columns: calc(var(--cell) * .68) repeat(10, var(--cell));
  grid-template-rows: calc(var(--cell) * .68) repeat(10, var(--cell));
  width: fit-content;
  max-width: 100%;
  user-select: none;
}
.coord { display: grid; place-items: center; color: var(--faint); font: 500 9px/1 "IBM Plex Mono", monospace; }
.cell {
  position: relative;
  width: var(--cell); height: var(--cell); padding: 0;
  border: 0; border-right: 1px solid var(--grid-line); border-bottom: 1px solid var(--grid-line);
  background-color: var(--sea);
  background-image: radial-gradient(circle at 65% 35%, rgb(255 255 255 / 3%), transparent 45%);
  color: var(--ink);
}
.cell:nth-child(n) { border-radius: 0; }
.cell[data-row="0"] { border-top: 1px solid var(--grid-line); }
.cell[data-col="0"] { border-left: 1px solid var(--grid-line); }
.cell:not(:disabled) { cursor: crosshair; }
.cell:not(:disabled):hover { background: var(--sea-hi); box-shadow: inset 0 0 0 2px var(--signal); z-index: 2; }
.board-ship-overlay {
  --hull: #496570;
  --hull-hi: #8ba3aa;
  --hull-dark: #213b47;
  position: relative;
  z-index: 2;
  align-self: stretch;
  justify-self: stretch;
  pointer-events: none;
  filter: drop-shadow(0 3px 3px rgb(0 8 13 / 70%));
  transition: opacity .16s ease, filter .16s ease;
}
.board-ship-overlay.is-horizontal { margin: 5px 2px; }
.board-ship-overlay.is-vertical { margin: 2px 5px; }
.board-ship-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--hull-hi);
  background: linear-gradient(135deg, var(--hull-hi), var(--hull) 34%, var(--hull-dark));
}
.board-ship-overlay.is-horizontal::before { clip-path: polygon(0 50%, 9% 4%, 89% 4%, 100% 31%, 100% 69%, 89% 96%, 9% 96%); }
.board-ship-overlay.is-vertical::before { clip-path: polygon(50% 0, 96% 9%, 96% 89%, 69% 100%, 31% 100%, 4% 89%, 4% 9%); }
.board-ship-overlay::after, .board-ship-overlay > i { content: ""; position: absolute; z-index: 1; display: block; pointer-events: none; }

/* Carrier: broad flight deck, dashed runway and starboard island. */
.board-ship-overlay.ship-carrier { --hull: #506b76; --hull-hi: #9bb0b5; --hull-dark: #253f4a; }
.board-ship-overlay.ship-carrier.is-horizontal::before { clip-path: polygon(1% 38%, 6% 5%, 92% 5%, 99% 26%, 99% 74%, 92% 95%, 6% 95%, 1% 62%); }
.board-ship-overlay.ship-carrier.is-vertical::before { clip-path: polygon(38% 1%, 95% 6%, 95% 92%, 74% 99%, 26% 99%, 5% 92%, 5% 6%, 62% 1%); }
.board-ship-overlay.ship-carrier.is-horizontal::after { left: 10%; right: 11%; top: 50%; height: 2px; background: repeating-linear-gradient(90deg, #d7e5e6 0 7px, transparent 7px 14px); transform: translateY(-50%); opacity: .8; }
.board-ship-overlay.ship-carrier.is-vertical::after { top: 10%; bottom: 11%; left: 50%; width: 2px; background: repeating-linear-gradient(180deg, #d7e5e6 0 7px, transparent 7px 14px); transform: translateX(-50%); opacity: .8; }
.board-ship-overlay.ship-carrier.is-horizontal > i { right: 24%; top: 1px; width: 18px; height: 11px; border: 1px solid #c5d5d8; background: #2b4651; box-shadow: -2px 12px 0 -4px var(--signal); }
.board-ship-overlay.ship-carrier.is-vertical > i { left: 1px; bottom: 24%; width: 11px; height: 18px; border: 1px solid #c5d5d8; background: #2b4651; box-shadow: 12px 2px 0 -4px var(--signal); }

/* Battleship: armoured beam, triple main-turret signatures. */
.board-ship-overlay.ship-battleship { --hull: #607680; --hull-hi: #b1c1c4; --hull-dark: #2a414b; }
.board-ship-overlay.ship-battleship.is-horizontal::after { inset: 0; background: radial-gradient(circle at 20% 50%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px), radial-gradient(circle at 46% 50%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px), radial-gradient(circle at 73% 50%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px); }
.board-ship-overlay.ship-battleship.is-vertical::after { inset: 0; background: radial-gradient(circle at 50% 20%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px), radial-gradient(circle at 50% 46%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px), radial-gradient(circle at 50% 73%, #d6e0e1 0 3px, #2b444e 4px 7px, transparent 8px); }
.board-ship-overlay.ship-battleship.is-horizontal > i { left: 56%; top: 4px; width: 18px; height: 12px; border: 1px solid #afc1c5; background: #3b5661; }
.board-ship-overlay.ship-battleship.is-vertical > i { top: 56%; left: 4px; width: 12px; height: 18px; border: 1px solid #afc1c5; background: #3b5661; }

/* Cruiser: slimmer hull with central radar superstructure. */
.board-ship-overlay.ship-cruiser { --hull: #526e78; --hull-hi: #9db2b7; --hull-dark: #223e49; }
.board-ship-overlay.ship-cruiser.is-horizontal { margin-block: 7px; }
.board-ship-overlay.ship-cruiser.is-vertical { margin-inline: 7px; }
.board-ship-overlay.ship-cruiser.is-horizontal::after { left: 49%; top: -3px; width: 2px; height: 21px; background: #c7dadd; box-shadow: -6px 5px 0 -1px #78919a, 6px 5px 0 -1px #78919a; }
.board-ship-overlay.ship-cruiser.is-vertical::after { top: 49%; left: -3px; width: 21px; height: 2px; background: #c7dadd; box-shadow: 5px -6px 0 -1px #78919a, 5px 6px 0 -1px #78919a; }
.board-ship-overlay.ship-cruiser > i { left: 43%; top: 30%; width: 14%; height: 40%; border: 1px solid #adc2c6; background: #36515c; }

/* Submarine: low dark capsule with sail and centreline. */
.board-ship-overlay.ship-submarine { --hull: #243f4a; --hull-hi: #73939b; --hull-dark: #102b36; }
.board-ship-overlay.ship-submarine.is-horizontal { margin-block: 9px; }
.board-ship-overlay.ship-submarine.is-vertical { margin-inline: 9px; }
.board-ship-overlay.ship-submarine::before { border-radius: 50%; clip-path: none; }
.board-ship-overlay.ship-submarine.is-horizontal::after { left: 15%; right: 15%; top: 50%; height: 1px; background: #9db5ba; opacity: .55; }
.board-ship-overlay.ship-submarine.is-vertical::after { top: 15%; bottom: 15%; left: 50%; width: 1px; background: #9db5ba; opacity: .55; }
.board-ship-overlay.ship-submarine.is-horizontal > i { left: 47%; top: -2px; width: 17px; height: 12px; border-radius: 50% 50% 25% 25%; border: 1px solid #92aab0; background: #294752; }
.board-ship-overlay.ship-submarine.is-vertical > i { top: 47%; left: -2px; width: 12px; height: 17px; border-radius: 50% 25% 25% 50%; border: 1px solid #92aab0; background: #294752; }

/* Destroyer: narrow fast hull, gun and torpedo accents. */
.board-ship-overlay.ship-destroyer { --hull: #4b6873; --hull-hi: #9eb4b9; --hull-dark: #1e3944; }
.board-ship-overlay.ship-destroyer.is-horizontal { margin-block: 9px; }
.board-ship-overlay.ship-destroyer.is-vertical { margin-inline: 9px; }
.board-ship-overlay.ship-destroyer.is-horizontal::after { left: 30%; right: 18%; top: 50%; height: 3px; background: repeating-linear-gradient(90deg, var(--signal) 0 8px, transparent 8px 13px); transform: translateY(-50%); opacity: .75; }
.board-ship-overlay.ship-destroyer.is-vertical::after { top: 30%; bottom: 18%; left: 50%; width: 3px; background: repeating-linear-gradient(180deg, var(--signal) 0 8px, transparent 8px 13px); transform: translateX(-50%); opacity: .75; }
.board-ship-overlay.ship-destroyer.is-horizontal > i { left: 17%; top: 2px; width: 12px; height: 12px; border-radius: 50%; border: 1px solid #c6d6d9; background: #334e59; }
.board-ship-overlay.ship-destroyer.is-vertical > i { top: 17%; left: 2px; width: 12px; height: 12px; border-radius: 50%; border: 1px solid #c6d6d9; background: #334e59; }
.cell.is-selected { box-shadow: inset 0 0 0 3px var(--signal); background: #27414a; z-index: 4; }
.cell.is-miss { z-index: 3; }
.cell.is-miss::after { content: ""; position: absolute; width: 6px; height: 6px; left: 50%; top: 50%; border: 1px solid var(--miss); border-radius: 50%; transform: translate(-50%, -50%); }
.cell.is-hit { z-index: 4; background: rgb(239 100 94 / 18%); }
.cell.is-hit::before { content: ""; position: absolute; inset: 7px; background: var(--hit); clip-path: polygon(42% 0, 58% 0, 58% 42%, 100% 42%, 100% 58%, 58% 58%, 58% 100%, 42% 100%, 42% 58%, 0 58%, 0 42%, 42% 42%); transform: rotate(45deg); z-index: 4; }
.cell.is-sunk { background: rgb(239 100 94 / 30%); }

.placement-tools { display: grid; gap: 12px; }
.tools-head { display: flex; justify-content: space-between; align-items: end; gap: 12px; }
.tools-head .kicker { margin-bottom: 5px; }
.tools-head h2 { margin: 0; font: 700 25px/1 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.drag-legend { color: var(--signal); font-size: 9px; letter-spacing: .1em; white-space: nowrap; }
.ship-yard { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.fleet-piece {
  min-width: 0;
  min-height: 64px;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--navy-2);
  color: var(--ink);
  text-align: left;
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.fleet-piece:hover { border-color: var(--signal); }
.fleet-piece:active, .fleet-piece.is-drag-source { cursor: grabbing; border-color: var(--signal); background: #18323d; }
.fleet-piece.is-drag-source { opacity: .58; transform: scale(.98); }
.fleet-piece.is-placed { border-color: rgb(114 198 164 / 54%); }
.ship-avatar { width: 40px; height: 40px; display: block; overflow: hidden; border: 1px solid var(--line); background: var(--sea); pointer-events: none; }
.ship-avatar-image { display: block; width: 100%; height: 100%; object-fit: cover; }
.fleet-piece.is-placed .ship-avatar { border-color: var(--good); box-shadow: 0 0 0 1px rgb(114 198 164 / 18%); }
.piece-copy { min-width: 0; display: grid; gap: 4px; }
.piece-copy strong { overflow: hidden; font: 600 13px/1 "Barlow Condensed", sans-serif; text-overflow: ellipsis; text-transform: uppercase; letter-spacing: .04em; }
.piece-copy small { color: var(--faint); font-size: 8px; text-transform: uppercase; }
.piece-body { display: flex; gap: 1px; align-items: center; justify-content: center; min-width: 9px; min-height: 9px; }
.piece-body i { display: block; width: 7px; height: 8px; flex: 0 0 7px; border: 1px solid #76909a; background: #405966; }
.fleet-piece[data-orientation="vertical"] .piece-body { flex-direction: column; }
.fleet-piece.is-placed .piece-body i { border-color: var(--good); background: rgb(114 198 164 / 34%); }
.dragging-ship, .dragging-ship * { cursor: grabbing !important; user-select: none !important; }
.sea-board.is-placement .cell.has-ship { cursor: grab; touch-action: none; }
.sea-board.is-placement .cell.has-ship:active { cursor: grabbing; }
.sea-board.is-placement .cell:not(:disabled):hover { z-index: 3; background: rgb(30 68 80 / 58%); }
.board-ship-overlay.is-drag-origin { opacity: .16; filter: none; }
.cell.is-drop-valid, .cell.is-drop-invalid { z-index: 6; }
.cell.is-drop-valid::before, .cell.is-drop-invalid::before { content: ""; position: absolute; inset: 2px; z-index: 8; }
.cell.is-drop-valid::before { border: 2px solid var(--good); background: rgb(114 198 164 / 38%); }
.cell.is-drop-invalid::before { border: 2px solid var(--hit); background: rgb(239 100 94 / 34%); }
.dragging-ship .cell:not(:disabled):hover { background: transparent; box-shadow: none; }
.deck { display: flex; gap: 2px; }
.deck i { display: block; width: 12px; height: 7px; border: 1px solid var(--faint); background: var(--panel-hi); }
.tool-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tool-actions .primary-btn { grid-column: 1 / -1; margin-top: 0; }
.setup-note { padding: 11px 12px; border-left: 2px solid var(--signal); color: var(--muted); font-size: 10px; line-height: 1.55; }
.ready-card { padding: 28px; text-align: center; }
.ready-card h2 { margin: 8px 0; font: 700 31px/1 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.ready-card p { color: var(--muted); font-size: 11px; line-height: 1.6; }

.battle-layout { display: grid; grid-template-columns: 1fr 280px; gap: clamp(22px, 4vw, 46px); align-items: start; }
.boards-wrap { display: grid; grid-template-columns: repeat(2, max-content); gap: clamp(20px, 4vw, 48px); overflow-x: auto; padding-bottom: 5px; }
.board-card.is-hidden-mobile { display: block; }
.board-card .sea-board { --cell: min(3.15vw, 33px); }
.battle-sidebar { display: grid; gap: 12px; }
.turn-card { padding: 20px; border: 1px solid var(--line); background: var(--panel); }
.turn-card.is-yours { border-color: var(--signal-dark); }
.turn-card .kicker { margin-bottom: 6px; }
.turn-card h2 { margin: 0; font: 700 27px/1 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.turn-card p { margin: 10px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.fire-control { padding: 14px; border: 1px solid var(--line); }
.target-readout { display: flex; justify-content: space-between; align-items: center; min-height: 42px; color: var(--muted); font-size: 11px; }
.target-readout strong { color: var(--signal); font: 700 24px/1 "Barlow Condensed", sans-serif; }
.fire-control .primary-btn { margin-top: 8px; }
.fleet-status { padding: 16px; border: 1px solid var(--line); }
.fleet-status h3 { margin: 0 0 12px; color: var(--muted); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.fleet-row { display: flex; align-items: center; justify-content: space-between; min-height: 27px; color: var(--muted); font-size: 10px; }
.fleet-row.is-sunk { color: var(--hit); }
.fleet-row.is-sunk > span:first-child { text-decoration: line-through; }
.fleet-row .deck i { position: relative; width: 8px; height: 5px; }
.fleet-row.is-sunk .deck i { border-color: var(--hit); background: rgb(239 100 94 / 18%); }
.fleet-row.is-sunk .deck i::after { content: "×"; position: absolute; left: 50%; top: 50%; color: var(--hit); font: 700 10px/1 sans-serif; transform: translate(-50%, -53%); }
.mobile-tabs { display: none; grid-template-columns: 1fr 1fr; margin-bottom: 14px; }
.tab-btn { background: transparent; border-color: var(--line); color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.tab-btn + .tab-btn { border-left: 0; }
.tab-btn.is-active { color: var(--signal); border-color: var(--signal); }

.end-card { padding: clamp(28px, 6vw, 52px); text-align: center; }
.end-mark { width: 72px; height: 72px; display: grid; place-items: center; margin: 0 auto 18px; border: 1px solid currentColor; border-radius: 50%; color: var(--signal); font: 700 34px/1 "Barlow Condensed", sans-serif; }
.end-card.is-loss .end-mark { color: var(--hit); }
.end-card h2 { margin: 0; font: 800 clamp(44px, 8vw, 76px)/.9 "Barlow Condensed", sans-serif; text-transform: uppercase; }
.end-card p { color: var(--muted); font-size: 11px; line-height: 1.7; }
.end-card .primary-btn { width: min(310px, 100%); }

.toast { position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom)); z-index: 50; max-width: calc(100vw - 32px); padding: 12px 16px; transform: translate(-50%, 24px); opacity: 0; pointer-events: none; border: 1px solid var(--line); background: #152e39; color: var(--ink); box-shadow: var(--shadow); font-size: 11px; transition: .2s ease; }
.toast.is-visible { transform: translate(-50%, 0); opacity: 1; }
.toast.is-error { border-color: var(--hit); }

@media (max-width: 780px) {
  .topbar { height: 58px; grid-template-columns: 42px 1fr auto; }
  .brand { font-size: 18px; }
  .app { padding-top: 18px; }
  .game-shell { gap: 14px; }
  .welcome { min-height: auto; grid-template-columns: 1fr; align-content: start; gap: 34px; }
  .hero-copy h1 { font-size: clamp(68px, 24vw, 112px); }
  .lede { margin-top: 24px; }
  .fleet-silhouette { display: none; }
  .setup-layout, .battle-layout { grid-template-columns: 1fr; }
  .setup-layout { gap: 14px; }
  .placement-tools { grid-row: 1; gap: 8px; }
  .ship-yard { gap: 6px; }
  .fleet-piece { min-height: 52px; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 5px; padding: 6px 7px; }
  .ship-avatar { width: 36px; height: 36px; }
  .piece-copy strong { font-size: 12px; }
  .piece-copy small { font-size: 7px; }
  .piece-body { gap: 1px; }
  .piece-body i { width: 7px; height: 7px; flex-basis: 7px; }
  .setup-note { display: none; }
  .tool-actions { grid-template-columns: 72px 92px 1fr; gap: 6px; }
  .tool-actions .primary-btn { grid-column: auto; min-width: 0; padding-inline: 8px; font-size: 11px; }
  .board-panel { overflow-x: auto; }
  .board-heading { width: calc(var(--cell) * 10.68); margin-bottom: 8px; }
  .board-heading > p { max-width: 48%; text-align: right; line-height: 1.35; }
  .mission-bar { align-items: center; }
  .mission-meta .phase-chip:first-child { display: none; }
  .mobile-tabs { display: grid; }
  .boards-wrap { display: block; overflow: visible; }
  .boards-wrap.board-swipe { position: relative; overflow: clip; }
  .boards-wrap.board-swipe .board-card:not(.is-hidden-mobile) { animation: board-swipe-in .26s cubic-bezier(.2, .75, .25, 1) both; }
  .boards-wrap.board-swipe::after { content: ""; position: absolute; inset: 0; z-index: 10; pointer-events: none; background: linear-gradient(90deg, transparent 0%, rgb(108 208 216 / 0) 37%, rgb(108 208 216 / .28) 50%, rgb(108 208 216 / 0) 63%, transparent 100%); animation: board-wake .26s ease-out both; }
  .boards-wrap.board-swipe.to-enemy { --swipe-offset: 10%; }
  .boards-wrap.board-swipe.to-own { --swipe-offset: -10%; }
  @keyframes board-swipe-in { from { opacity: .35; transform: translateX(var(--swipe-offset)); } to { opacity: 1; transform: translateX(0); } }
  @keyframes board-wake { from { opacity: 0; transform: translateX(calc(var(--swipe-offset) * -2)); } 35% { opacity: 1; } to { opacity: 0; transform: translateX(calc(var(--swipe-offset) * 2)); } }
  .board-card { width: fit-content; margin: 0 auto; }
  .board-card.is-hidden-mobile { display: none; }
  .board-card .sea-board { --cell: min(8.25vw, 38px); }
  .battle-sidebar { grid-template-columns: 1fr; padding-bottom: 82px; }
  .fire-control { position: fixed; z-index: 30; left: 16px; right: 16px; bottom: calc(10px + env(safe-area-inset-bottom)); display: grid; grid-template-columns: 1fr 118px; align-items: center; gap: 10px; padding: 9px 10px; background: #0b1d29; box-shadow: 0 12px 34px rgb(0 0 0 / 48%); }
  .fire-control .target-readout { min-height: 46px; padding: 0 5px; }
  .fire-control .primary-btn { height: 46px; margin: 0; }
}

@media (max-width: 390px) {
  .connection { min-width: 0; padding: 5px; font-size: 0; }
  .connection::before { content: ""; display: block; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
  .hero-copy h1 { font-size: 68px; }
  .mission-bar h1 { font-size: 31px; }
  .command-card { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}