* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #16332f;
  --panel: #1a3d38;
  --panel-border: #2f6152;
  --green: #4dffbe;
  --green-dim: #3d9678;
  --amber: #ffc266;
  --amber-dim: #c98a30;
  --red: #ff6b6b;
  --ink: #f3fffa;
  --muted: #a3d3c3;
}

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(ellipse at top, #234f48 0%, #17332f 60%, #102723 100%);
  color: var(--ink);
  font-family: 'Courier New', ui-monospace, "SF Mono", Menlo, monospace;
  min-height: 100vh;
  overscroll-behavior: none;
  touch-action: manipulation;
}

.scanlines {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.015) 0px,
    rgba(255,255,255,0.015) 1px,
    transparent 2px,
    transparent 3px
  );
  mix-blend-mode: overlay;
  opacity: 0.6;
}

.sound-toggle {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: 12px;
  z-index: 1000;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--green-dim);
  background: #06120f;
  color: var(--green);
  font-size: 1.1rem;
  cursor: pointer;
}

.quit-toggle {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  left: 12px;
  z-index: 1000;
  height: 40px;
  padding: 0 12px;
  border-radius: 20px;
  border: 1px solid #7a2020;
  background: #170a0a;
  color: #ff8a8a;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  font-family: inherit;
}
.quit-toggle.hidden { display: none; }

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.screen { display: none; width: 100%; flex-direction: column; align-items: center; text-align: center; }
.screen.active { display: flex; }

.home-radar-bg {
  position: fixed;
  top: 50%; left: 50%;
  width: min(140vw, 900px); height: min(140vw, 900px);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}
.home-radar-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(53,240,168,0.14);
  top: 50%; left: 50%;
}
.home-radar-ring.r1 { width: 30%; height: 30%; transform: translate(-50%,-50%); }
.home-radar-ring.r2 { width: 60%; height: 60%; transform: translate(-50%,-50%); }
.home-radar-ring.r3 { width: 92%; height: 92%; transform: translate(-50%,-50%); }
.home-radar-sweep {
  position: absolute; inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(53,240,168,0.22), transparent 20%);
  animation: sweep 6s linear infinite;
}
.home-radar-blip {
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px 2px rgba(53,240,168,0.8);
  animation: blip-pulse 2.4s ease-in-out infinite;
}
.home-radar-blip.b1 { top: 38%; left: 62%; animation-delay: 0.4s; }
.home-radar-blip.b2 { top: 65%; left: 35%; animation-delay: 1.3s; }
@keyframes blip-pulse { 0%, 100% { opacity: 0.3; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.3); } }

#screen-home { position: relative; z-index: 1; padding-top: 6vh; }

.status-line {
  margin-top: 10px;
  font-size: 0.65rem;
  letter-spacing: 1px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}
.status-sep { opacity: 0.4; margin: 0 2px; }
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px rgba(53,240,168,0.9);
  display: inline-block;
  animation: blip-pulse 1.8s ease-in-out infinite;
}

.brand { margin-bottom: 8px; }
.brand-badge {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 2px solid var(--green);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 8px;
  box-shadow: 0 0 18px rgba(53,240,168,0.45), inset 0 0 12px rgba(53,240,168,0.2);
}

h1 {
  font-size: 1.5rem;
  margin: 8px 0 2px;
  letter-spacing: 4px;
  color: var(--green);
  text-shadow: 0 0 12px rgba(53,240,168,0.65);
}
h2 {
  font-size: 1.15rem;
  margin: 4px 0;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.phosphor-green { color: var(--green); text-shadow: 0 0 10px rgba(53,240,168,0.6); }
.phosphor-amber { color: var(--amber); text-shadow: 0 0 10px rgba(255,179,71,0.55); }

.subtitle { color: var(--muted); margin-top: 0; letter-spacing: 2px; font-size: 0.75rem; }
.hint { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.5px; }
.blink-text { animation: blink 1.4s steps(2, jump-none) infinite; color: var(--green); }
@keyframes blink { 50% { opacity: 0.25; } }
.error { color: var(--red); min-height: 1.2em; font-size: 0.85rem; }

.card {
  background: linear-gradient(180deg, var(--panel), #123330);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 24px;
  width: 100%;
  max-width: 360px;
  margin-top: 20px;
  box-shadow: 0 0 30px rgba(53,240,168,0.06), inset 0 0 20px rgba(0,0,0,0.4);
}

.btn {
  display: block;
  width: 100%;
  padding: 14px 18px;
  border-radius: 6px;
  border: 1px solid var(--green-dim);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  margin: 6px 0;
  min-height: 48px;
  transition: transform 0.08s ease, opacity 0.15s ease, box-shadow 0.15s ease;
  font-family: inherit;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-primary { background: linear-gradient(180deg, #0e2d24, #071b16); color: var(--green); box-shadow: 0 0 16px rgba(53,240,168,0.25); }
.btn-primary:not(:disabled):hover { box-shadow: 0 0 24px rgba(53,240,168,0.4); }
.btn-secondary { background: #081613; color: var(--ink); border-color: var(--panel-border); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--panel-border); }

.divider { color: var(--muted); margin: 14px 0; font-size: 0.75rem; letter-spacing: 2px; }

#form-join { display: flex; flex-direction: column; gap: 8px; }
#input-code {
  padding: 14px;
  border-radius: 6px;
  border: 1px solid var(--panel-border);
  background: #030907;
  color: var(--green);
  font-size: 1.1rem;
  text-align: center;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-family: inherit;
}

.room-code {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 8px;
  background: #04100d;
  border: 1px solid var(--green-dim);
  border-radius: 10px;
  padding: 18px 24px;
  margin: 16px 0 10px;
  color: var(--green);
  text-shadow: 0 0 14px rgba(53,240,168,0.6);
}

#btn-share-invite { max-width: 340px; }
.invite-copied {
  color: var(--green);
  font-weight: 700;
  margin: -4px 0 8px;
}
.invite-copied.hidden { display: none; }

.spinner {
  width: 20px; height: 20px;
  border: 3px solid var(--green-dim);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.radar-mini {
  width: 90px; height: 90px;
  border-radius: 50%;
  border: 1px solid var(--green-dim);
  margin: 18px auto;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle, rgba(53,240,168,0.08), transparent 70%);
}
.radar-mini-sweep {
  position: absolute; inset: 0;
  background: conic-gradient(from 0deg, rgba(53,240,168,0.55), transparent 35%);
  animation: sweep 2.2s linear infinite;
}
@keyframes sweep { to { transform: rotate(360deg); } }

/* ---------- Grids ---------- */
.grid-wrap { width: 100%; max-width: 420px; margin: 10px auto; position: relative; }
.grid-with-side { display: flex; gap: 4px; }
.grid-coords-top {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
  margin-left: 22px;
  margin-bottom: 3px;
}
.grid-coords-top span, .grid-coords-side span {
  font-size: 0.65rem;
  color: var(--muted);
  display: flex; align-items: center; justify-content: center;
}
.grid-coords-side {
  display: grid;
  grid-template-rows: repeat(10, 1fr);
  gap: 3px;
  width: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  grid-template-rows: repeat(10, 1fr);
  gap: 3px;
  width: 100%;
  aspect-ratio: 1 / 1;
  touch-action: manipulation;
  position: relative;
  z-index: 2;
}

.cell {
  background: #204c45;
  border: 1px solid var(--green-dim);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  user-select: none;
  cursor: pointer;
  position: relative;
  transition: background 0.12s ease;
}
.cell.ship { background: #285c51; border-color: #3f9c7c; }
.cell.preview-ok { background: #227a5f; }
.cell.preview-bad { background: #6c2424; border-color: #a92e2e; }
.cell.targeted { background: #227a5f; box-shadow: inset 0 0 0 2px var(--green); }
.cell.targeted::after {
  content: '';
  position: absolute; inset: 15%;
  border: 2px solid var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(77,255,190,0.8);
}
.cell.hit { background: #6b1a1a; border-color: var(--red); }
.cell.hit-flash { animation: hit-pulse 2.6s ease-in-out; z-index: 4; }
@keyframes hit-pulse {
  0%   { box-shadow: 0 0 4px 2px rgba(255,80,40,0.5); }
  12%  { box-shadow: 0 0 22px 10px rgba(255,90,30,0.95); }
  24%  { box-shadow: 0 0 6px 2px rgba(255,80,40,0.4); }
  36%  { box-shadow: 0 0 18px 8px rgba(255,90,30,0.85); }
  50%  { box-shadow: 0 0 6px 2px rgba(255,80,40,0.4); }
  100% { box-shadow: 0 0 6px 2px rgba(255,80,40,0.3); }
}
.cell.miss { background: #1c3f38; }
.cell.miss::after {
  content: '';
  width: 42%; height: 42%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #eafff4, #7fd6c2 55%, #3a8f78 100%);
  box-shadow: 0 0 6px rgba(127,214,194,0.8), inset 0 0 2px rgba(0,0,0,0.4);
}
.cell.sunk { background: #4a1414; border-color: #a82c2c; }
.cell.sunk::after {
  content: '✕';
  color: #ffdada;
  font-weight: 900;
  font-size: 1.1rem;
  text-shadow: 0 0 6px rgba(255,60,30,0.8);
}
.cell.disabled { cursor: default; }

/* sonar screen (defense) ambient */
.sonar-screen { position: relative; }
.sonar-screen::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 8px;
  box-shadow: inset 0 0 0 1px var(--amber-dim);
  pointer-events: none;
  z-index: 1;
}
.sonar-screen.alert::before {
  animation: alert-flash 0.5s ease-in-out 4;
}
@keyframes alert-flash {
  0%, 100% { box-shadow: inset 0 0 0 1px var(--amber-dim); }
  50% { box-shadow: inset 0 0 0 4px var(--red), 0 0 30px rgba(255,77,77,0.6); }
}
.shake { animation: shake 0.4s ease; }
@keyframes shake {
  0%, 100% { transform: translate(0,0); }
  20% { transform: translate(-6px, 2px); }
  40% { transform: translate(5px, -3px); }
  60% { transform: translate(-4px, 3px); }
  80% { transform: translate(4px, -2px); }
}

/* radar sweep (attack) ambient */
.radar-screen { position: relative; overflow: hidden; border-radius: 8px; }
.radar-sweep {
  position: absolute; inset: 0;
  background: conic-gradient(from 0deg, rgba(53,240,168,0.16), transparent 25%);
  animation: sweep 3.5s linear infinite;
  z-index: 1;
  pointer-events: none;
}

.placement-layout { display: flex; flex-direction: column; align-items: center; width: 100%; }
.placement-controls { width: 100%; max-width: 420px; }

.ship-list { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 10px 0; }
.ship-chip {
  background: #081613;
  border: 2px solid var(--panel-border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.78rem;
  cursor: pointer;
  letter-spacing: 0.5px;
}
.ship-chip.selected { border-color: var(--green); background: #0f2a22; box-shadow: 0 0 10px rgba(53,240,168,0.3); }
.ship-chip.placed { opacity: 0.4; border-color: var(--green-dim); }

.control-row { display: flex; gap: 8px; }
.control-row .btn { flex: 1; }

.turn-banner {
  width: 100%;
  max-width: 420px;
  padding: 10px;
  border-radius: 6px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 6px;
  text-transform: uppercase;
  font-size: 0.85rem;
  border: 1px solid transparent;
}
.turn-banner.attack { background: #0a2b21; color: var(--green); border-color: var(--green-dim); text-shadow: 0 0 8px rgba(53,240,168,0.5); }
.turn-banner.defense { background: #2a1610; color: var(--amber); border-color: var(--amber-dim); text-shadow: 0 0 8px rgba(255,179,71,0.4); }

.panel { width: 100%; display: flex; flex-direction: column; align-items: center; }
.hidden { display: none !important; }

.waiting-row { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 8px; font-size: 0.8rem; }

.log {
  width: 100%;
  max-width: 420px;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--muted);
  max-height: 70px;
  overflow-y: auto;
  text-align: left;
}

/* ---------- Tilted 3D board ---------- */
.grid-wrap.board-3d {
  perspective: 1100px;
  padding: 14px 14px 30px;
  border-radius: 16px;
  background: linear-gradient(160deg, #234f48, #1a3d38 55%, #123330);
  border: 1px solid var(--green-dim);
  box-shadow: 0 14px 34px rgba(0,0,0,0.55), inset 0 0 22px rgba(0,0,0,0.4);
}
.board-3d-inner {
  transform: rotateX(24deg);
  transform-style: preserve-3d;
  transform-origin: 50% 100%;
  filter: drop-shadow(0 22px 16px rgba(0,0,0,0.55));
}

/* ---------- Realistic ship hulls ---------- */
.ship-layer { position: absolute; inset: 0; pointer-events: none; z-index: 3; }
.ship-model { position: absolute; padding: 4px; box-sizing: border-box; }
.ship-model::before {
  content: '';
  position: absolute; inset: 4px;
  background: linear-gradient(160deg, #c3e2e6 0%, #6f9aa3 30%, #35545e 65%, #1a2b31 100%);
  box-shadow:
    0 5px 8px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.45),
    inset 0 -5px 7px rgba(0,0,0,0.5);
  animation: ship-bob 3.6s ease-in-out infinite;
  animation-delay: inherit;
}
.ship-model::after {
  /* keel / centreline deck stripe */
  content: '';
  position: absolute;
  background: linear-gradient(rgba(255,255,255,0.55), rgba(255,255,255,0.1));
  border-radius: 2px;
  animation: ship-bob 3.6s ease-in-out infinite;
  animation-delay: inherit;
}
.ship-model.horizontal::before { clip-path: polygon(0% 50%, 9% 12%, 91% 12%, 100% 50%, 91% 88%, 9% 88%); }
.ship-model.horizontal::after { left: 14%; right: 14%; top: 46%; height: 8%; }
.ship-model.vertical::before   { clip-path: polygon(50% 0%, 12% 9%, 12% 91%, 50% 100%, 88% 91%, 88% 9%); }
.ship-model.vertical::after   { top: 14%; bottom: 14%; left: 46%; width: 8%; }

.ship-model.sunk::before {
  background: linear-gradient(160deg, #8a5252 0%, #5a2e2e 40%, #2c1414 75%, #150a0a 100%);
  filter: saturate(0.6) brightness(0.7);
  animation: none;
}
.ship-model.sunk::after { display: none; }

@keyframes ship-bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }

.ship-model .bow-wake {
  position: absolute;
  background: radial-gradient(circle, rgba(210,245,250,0.85) 0%, rgba(210,245,250,0.25) 45%, transparent 75%);
  border-radius: 50%;
  animation: wake-pulse 2.4s ease-in-out infinite;
  pointer-events: none;
}
.ship-model.horizontal .bow-wake { width: 22%; height: 60%; left: -8%; top: 20%; }
.ship-model.vertical .bow-wake { height: 22%; width: 60%; top: -8%; left: 20%; }
.ship-model.sunk .bow-wake { display: none; }
@keyframes wake-pulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }

.ship-model .bridge {
  position: absolute;
  background: linear-gradient(160deg, #eef7f8, #9db8bd 60%, #5c7a81);
  border-radius: 2px;
  box-shadow: 0 2px 3px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.6);
  z-index: 2;
}
.ship-model.sunk .bridge { background: linear-gradient(160deg, #7a4d4d, #3a1e1e 60%, #200f0f); }

.ship-model .turret {
  position: absolute;
  width: 11%; aspect-ratio: 1;
  max-width: 11px; max-height: 11px;
  min-width: 4px; min-height: 4px;
  background: radial-gradient(circle at 35% 30%, #dff2f4, #4d7480 75%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 1px 3px rgba(0,0,0,0.65);
  z-index: 2;
}
.ship-model.sunk .turret { background: radial-gradient(circle at 35% 30%, #a06a6a, #341818 75%); }

/* Big fire button */
.btn-fire {
  margin-top: 16px;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ff7a5c, #c81c1c 55%, #6e0f0f 100%);
  border: 4px solid #3a0808;
  color: #fff2ea;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 2px;
  cursor: pointer;
  box-shadow: 0 0 0 6px #150404, 0 8px 18px rgba(0,0,0,0.6), 0 0 30px rgba(255,60,30,0.35);
  transition: transform 0.08s ease, box-shadow 0.15s ease;
}
.btn-fire:not(:disabled):active { transform: scale(0.94); }
.btn-fire:disabled {
  background: radial-gradient(circle at 35% 30%, #3a3a3a, #1c1c1c 60%);
  color: #6a6a6a;
  box-shadow: 0 0 0 6px #0a0a0a;
  cursor: not-allowed;
}
.btn-fire:not(:disabled) { animation: fire-pulse 1.6s ease-in-out infinite; }
@keyframes fire-pulse {
  0%, 100% { box-shadow: 0 0 0 6px #150404, 0 8px 18px rgba(0,0,0,0.6), 0 0 30px rgba(255,60,30,0.35); }
  50% { box-shadow: 0 0 0 6px #150404, 0 8px 18px rgba(0,0,0,0.6), 0 0 46px rgba(255,60,30,0.65); }
}

/* Projectile / impact FX */
.projectile {
  position: absolute;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #fff2ea;
  box-shadow: 0 0 10px 4px rgba(255,180,80,0.9);
  z-index: 5;
  pointer-events: none;
}
.impact-fx {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 6;
}
.impact-fx.explosion {
  background: radial-gradient(circle, #fff2ea 0%, #ff7a2e 35%, #c81c1c 60%, transparent 75%);
  animation: explode 0.55s ease-out forwards;
}
.impact-fx.splash {
  border: 2px solid rgba(120,200,255,0.8);
  animation: splash 0.6s ease-out forwards;
}
@keyframes explode {
  0% { width: 4px; height: 4px; opacity: 1; }
  100% { width: 70px; height: 70px; opacity: 0; margin: -35px 0 0 -35px; }
}
@keyframes splash {
  0% { width: 4px; height: 4px; opacity: 1; }
  100% { width: 50px; height: 50px; opacity: 0; margin: -25px 0 0 -25px; }
}

.sunk-banner {
  /* Anchored near the top of the screen, not the centre — a centred banner
     could land directly on top of the very ship it's announcing, on a wide
     grid, making the message unreadable against its own subject. Stacked
     BELOW the general-alert "damage assessment" banner (which occupies the
     8vh-from-top band during a nuke barrage) so the two never overlap —
     they can both be visible at once when a nuke sinks a ship. */
  position: fixed;
  top: max(190px, calc(8vh + 110px + env(safe-area-inset-top)));
  left: 50%;
  transform: translate(-50%, -14px) scale(0.92);
  z-index: 1200;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 16px 26px;
  border: 2px solid var(--red);
  border-radius: 10px;
  background: rgba(8,4,4,0.94);
  box-shadow: 0 8px 40px rgba(0,0,0,0.6), 0 0 40px rgba(255,60,30,0.5), inset 0 0 20px rgba(255,60,30,0.15);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(.34,1.56,.64,1);
  text-align: center;
  max-width: 90vw;
}
.sunk-banner.hidden { display: flex; }
.sunk-banner.show { opacity: 1; transform: translate(-50%, 0) scale(1); }
.sunk-banner-sub {
  font-size: 0.7rem;
  letter-spacing: 2px;
  color: var(--amber);
}
.sunk-banner-text {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 1.5px;
  color: #ffdede;
  text-shadow: 0 0 16px rgba(255,60,30,0.9);
  animation: sunk-shake 0.4s ease 2;
}
@keyframes sunk-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* ---------- Nuclear strike ---------- */
.btn-nuke {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 2px solid #ffb800;
  background: linear-gradient(180deg, #3a2a00, #1a1200);
  color: #ffcc33;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 0 14px rgba(255,184,0,0.35);
}
.btn-nuke:disabled { opacity: 0.35; cursor: not-allowed; box-shadow: none; }
.nuke-hint { margin-top: 8px; max-width: 160px; }

.cell.nuke-preview { background: #6b3a0a; box-shadow: inset 0 0 0 2px #ffb800; }
.cell.nuke-preview-bad { background: #5c1c1c; box-shadow: inset 0 0 0 2px #a92e2e; }

.modal-overlay {
  position: fixed; inset: 0; z-index: 1300;
  background: rgba(3,8,7,0.85);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay.hidden { display: none; }
.modal-box {
  background: linear-gradient(180deg, #1a3d38, #0c211d);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 24px;
  max-width: 340px;
  width: 100%;
  text-align: center;
}
.nuke-modal { border-color: #ffb800; box-shadow: 0 0 30px rgba(255,184,0,0.25); }
.nuke-modal-title {
  color: #ffcc33;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 10px;
  font-size: 0.95rem;
}
.key-dial-wrap {
  position: relative;
  width: 180px; height: 180px;
  margin: 18px auto;
  touch-action: none;
}
.key-dial-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 3px solid #4a3308;
  background: radial-gradient(circle, rgba(255,184,0,0.06), transparent 70%);
}
.key-dial-ring::before {
  /* target notch showing where the key must reach */
  content: '';
  position: absolute;
  top: 6px; left: 50%;
  width: 4px; height: 14px;
  background: #ffb800;
  border-radius: 2px;
  transform-origin: 2px 84px;
  transform: translateX(-2px) rotate(100deg);
  box-shadow: 0 0 8px rgba(255,184,0,0.8);
}
.key-dial {
  position: absolute; inset: 0;
  border-radius: 50%;
  transform: rotate(0deg);
  cursor: grab;
}
.key-dial.armed { cursor: default; }
.key-dial-handle {
  position: absolute;
  top: 4px; left: 50%;
  width: 44px; height: 44px;
  margin-left: -22px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ffe9a8, #ffb800 60%, #a06800);
  box-shadow: 0 0 16px rgba(255,184,0,0.55), inset 0 0 6px rgba(0,0,0,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  user-select: none;
}
#key-dial-status.armed-text { color: #4dffbe; text-shadow: 0 0 10px rgba(77,255,190,0.6); }

.general-alert {
  position: fixed; inset: 0; z-index: 1250;
  pointer-events: none;
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 8vh;
}
.general-alert.hidden { display: none; }
.general-alert::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(180,20,20,0.28);
  animation: general-alert-flash 0.5s steps(2, jump-none) infinite;
}
@keyframes general-alert-flash { 50% { background: rgba(180,20,20,0.05); } }
.general-alert-text {
  position: relative;
  background: #2a0a0a;
  border: 2px solid var(--red);
  border-radius: 10px;
  padding: 14px 22px;
  color: #ffdada;
  font-weight: 900;
  letter-spacing: 1px;
  font-size: 1.1rem;
  text-shadow: 0 0 12px rgba(255,60,30,0.9);
  animation: sunk-shake 0.4s ease infinite;
  min-width: 240px;
  text-align: center;
}

/* damage-assessment phase — calmer amber "analysis" look instead of the red siren */
.general-alert.scanning::before { background: rgba(255,184,0,0.1); animation: none; }
.general-alert.scanning .general-alert-text {
  border-color: #ffb800;
  background: #2a1a00;
  color: #ffe9a8;
  text-shadow: 0 0 12px rgba(255,184,0,0.7);
  animation: none;
}
.general-alert.scanning .general-alert-text::after {
  content: '';
  display: block;
  height: 3px;
  margin-top: 10px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, #ffb800, transparent);
  animation: scan-sweep 1.1s ease-in-out infinite;
}
@keyframes scan-sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.version-badge {
  position: fixed;
  bottom: 8px;
  right: 10px;
  z-index: 500;
  font-size: 0.6rem;
  color: var(--muted);
  opacity: 0.5;
  letter-spacing: 1px;
  pointer-events: none;
}

.install-banner {
  position: fixed;
  left: 12px; right: 12px;
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 1300;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(160deg, #1a3d38, #0e2521);
  border: 1px solid var(--green-dim);
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5), 0 0 18px rgba(77,255,190,0.15);
}
.install-banner.hidden { display: none; }
#install-banner-text { flex: 1; font-size: 0.78rem; color: var(--ink); }
.install-banner .btn { width: auto; padding: 10px 16px; margin: 0; flex: 0 0 auto; }
.install-dismiss {
  flex: 0 0 auto;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px 6px;
}

.version-mismatch {
  position: fixed;
  top: max(60px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1400;
  background: #2a1600;
  border: 2px solid #ffb800;
  border-radius: 10px;
  padding: 12px 16px;
  color: #ffcc33;
  font-size: 0.78rem;
  text-align: center;
  max-width: 90vw;
  box-shadow: 0 0 24px rgba(255,184,0,0.35);
}
.version-mismatch.hidden { display: none; }
.version-mismatch .btn { margin-top: 8px; width: auto; padding: 8px 16px; display: inline-block; }

#screen-end h2 { font-size: 1.7rem; }

.recap {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  margin-top: 28px;
  width: 100%;
}
.recap-board { display: flex; flex-direction: column; align-items: center; }
.recap-board h3 {
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 6px;
}
#screen-end .grid-wrap.recap-grid {
  width: 300px;
  max-width: 300px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: linear-gradient(160deg, #234f48, #1a3d38 60%);
}
#screen-end .recap-grid .grid {
  gap: 1px;
  background: linear-gradient(160deg, #234f48, #1a3d38 60%);
}
#screen-end .recap-grid .cell { cursor: default; }

@media (min-width: 640px) {
  .placement-layout { flex-direction: row; align-items: flex-start; justify-content: center; gap: 24px; }
  .grid-wrap { margin: 12px 0; }
}

/* ---------- Wide viewports: iPad landscape & desktop ---------- */
/* the attack/defense boards should dominate the screen, not sit in a
   narrow centred column — size them off the viewport itself */
@media (min-width: 700px) {
  #app { max-width: 96vw; }

  #screen-game.active { display: flex; flex-direction: column; align-items: center; width: 100%; }
  .turn-banner { max-width: 92vw; }

  .panel {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 48px;
    width: 100%;
    max-width: 92vw;
  }
  .panel-main { flex: 0 1 auto; }
  .panel-side { flex: 0 0 auto; display: flex; flex-direction: column; align-items: center; }
  .grid-wrap { width: min(70vw, 66vh); max-width: none; margin: 8px auto; }
  .btn-fire { margin-top: 0; width: 150px; height: 150px; }
  .waiting-row { flex-direction: column; gap: 14px; }

  .log { max-width: 92vw; }

  .placement-layout { gap: 56px; width: 100%; justify-content: center; }
  #screen-placement .grid-wrap { width: min(58vw, 66vh); max-width: none; }

  .home-radar-bg { width: min(90vh, 900px); height: min(90vh, 900px); }
  .card { max-width: 420px; }
  .room-code { font-size: 3.2rem; }
}

@media (min-width: 1300px) {
  .grid-wrap { width: min(68vw, 74vh); max-width: none; }
  #screen-placement .grid-wrap { width: min(52vw, 74vh); max-width: none; }
}