.screen {
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 16px calc(20px + env(safe-area-inset-bottom));
  background:
    radial-gradient(120% 90% at 50% -10%, #123a5c 0%, #0a1220 55%, #070c16 100%);
}

.logo-sm {
  font-size: 30px;
  font-weight: 900;
  letter-spacing: 3px;
  color: var(--ink);
  margin-top: 8px;
  text-shadow: 0 0 18px rgba(84, 160, 255, 0.45);
}
.logo-sub {
  color: var(--dim);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  margin: 8px 0 22px;
  text-align: center;
}

/* ---------- hub ---------- */
.hub-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 420px;
  margin-bottom: 24px;
}
.hub-card {
  display: block;
  text-decoration: none;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  transition: transform 0.12s, border-color 0.12s;
}
.hub-card:hover { transform: translateY(-2px); border-color: var(--blue); }
.hub-card-title {
  display: block;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--ink);
}
.hub-card-desc {
  display: block;
  color: var(--dim);
  font-size: 13px;
  margin: 6px 0 14px;
}
.hub-card .btn { width: 100%; }

.code-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 420px;
}
.code-row input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 8px;
  text-align: center;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 10px 6px;
  outline: none;
}
.code-row input:focus { border-color: var(--blue); }

/* ---------- customize ---------- */
.custom-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 420px;
  margin-bottom: 22px;
}
.custom-block {
  width: 100%;
  max-width: 420px;
  margin-bottom: 20px;
}
.sec-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--dim);
  margin-bottom: 10px;
}
.custom-block input {
  width: 100%;
  font: inherit;
  font-size: 18px;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
}
.custom-block input:focus { border-color: var(--blue); }

.swatches {
  display: flex;
  gap: 14px;
}
.swatch {
  flex: 1;
  border-radius: 14px;
  padding: 16px 10px;
  border: 3px solid var(--line);
  background: var(--panel);
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 15px;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.swatch .dot {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.25);
}
.swatch.sel { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent) inset; }
#screen-customize > .btn { max-width: 420px; width: 100%; }

/* ---------- placement ---------- */
.place-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 440px;
  margin-bottom: 12px;
}
#place-canvas {
  width: min(92vw, 420px);
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 3px solid var(--line);
  border-radius: 12px;
  background: var(--bg2);
  touch-action: none;
}
.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
  max-width: 440px;
  margin-top: 14px;
  justify-content: center;
}
.ship-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 10px;
  border-radius: 10px;
  background: var(--panel);
  border: 2px solid var(--line);
  color: var(--dim);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
}
.ship-chip canvas { image-rendering: pixelated; }
.ship-chip.sel { border-color: var(--accent); color: var(--ink); }
.ship-chip.placed { opacity: 0.45; border-color: var(--line); }
.ship-chip.missing { border-color: var(--danger); }

.place-actions {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 440px;
  margin-top: 14px;
}
.place-actions .btn { flex: 1; padding: 12px 6px; font-size: 15px; }
.hint {
  margin-top: 12px;
  color: var(--dim);
  font-size: 13px;
  text-align: center;
  min-height: 18px;
}

/* ---------- battle ---------- */
.screen.battle { padding: 0; background: var(--bg2); }
#battle-canvas-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  padding-top: 10px;
}
#battle-canvas {
  width: min(94vw, 430px);
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 3px solid var(--line);
  border-radius: 12px;
  background: var(--bg2);
  touch-action: none;
}
.battle-hud {
  width: 100%;
  max-width: 430px;
  padding: 10px 16px;
}
.battle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.timer-track {
  height: 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
  margin-top: 10px;
  overflow: hidden;
}
#battle-timer-bar {
  height: 100%;
  width: 0%;
  background: var(--blue);
  transition: width 0.2s linear;
}
#battle-timer-bar.enemy { background: var(--dim); }
#battle-timer-bar.low { background: var(--danger); }
.battle-sub {
  margin-top: 8px;
  color: var(--dim);
  font-size: 13px;
  text-align: center;
  min-height: 18px;
  font-weight: 700;
}
.callout {
  position: fixed;
  left: 0;
  right: 0;
  top: 34vh;
  text-align: center;
  pointer-events: none;
  font-size: 46px;
  font-weight: 900;
  letter-spacing: 4px;
  color: #fff;
  text-shadow: 0 3px 0 rgba(0, 0, 0, 0.55), 0 0 24px rgba(255, 90, 95, 0.7);
  opacity: 0;
  transform: scale(0.6);
}
.callout.show { animation: popout 0.9s ease-out forwards; }
.callout.miss { color: var(--blue); text-shadow: 0 3px 0 rgba(0, 0, 0, 0.55), 0 0 24px rgba(84, 160, 255, 0.7); }
.callout.sink { color: var(--accent); text-shadow: 0 3px 0 rgba(0, 0, 0, 0.55), 0 0 24px rgba(255, 217, 61, 0.9); }
@keyframes popout {
  0% { opacity: 0; transform: scale(0.6); }
  15% { opacity: 1; transform: scale(1.15); }
  30% { transform: scale(1); }
  75% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.1); }
}

/* ---------- result ---------- */
#result-title { font-size: 40px; margin-top: 40px; }
#result-title.lose { color: var(--danger); text-shadow: 0 0 18px rgba(255, 90, 95, 0.5); }
#result-title.win { color: var(--accent); text-shadow: 0 0 18px rgba(255, 217, 61, 0.5); }
.result-stats {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 18px;
}
.result-stats .rs-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-weight: 700;
}
.result-stats .rs-row:last-child { border-bottom: none; }
.result-stats .rs-k { color: var(--dim); }
.result-stats .rs-v { color: var(--ink); }
#result-status { margin-top: 6px; }