:root {
  --radar-green: #00ff88;
  --radar-green-glow: rgba(0, 255, 136, 0.35);
  --radar-bg: #0a0f0d;
  --radar-panel-bg: rgba(0, 20, 12, 0.85);
  --radar-border: #00ff8833;
  --text-dim: #00ff8877;
  --hit-color: #00ff88;
  --miss-color: #ff3366;
  --ship-color: #00cc6a;
  --font-display: 'Orbitron', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

body.light-mode {
  --radar-green: #0b6b46;
  --radar-green-glow: rgba(16, 153, 98, 0.22);
  --radar-bg: #f7fbf8;
  --radar-panel-bg: rgba(255, 255, 255, 0.95);
  --radar-border: rgba(11, 107, 70, 0.25);
  --text-dim: rgba(11, 107, 70, 0.75);
  --hit-color: #12a96a;
  --miss-color: #e04b5a;
  --ship-color: #1f8b60;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-mono);
  background: var(--radar-bg);
  color: var(--radar-green);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}
.hidden { display: none !important; }

.radar-bg { position: fixed; inset: 0; pointer-events: none; z-index: 0; background: radial-gradient(ellipse 80% 80% at 50% 50%, #0d1a14 0%, #050908 100%); }
.scan-line { position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 0%, rgba(0,255,136,0.03) 50%, transparent 100%); background-size: 100% 8px; animation: scan 4s linear infinite; }
.vignette { position: absolute; inset: 0; background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.7) 100%); }
.grid-overlay { position: absolute; inset: 0; background-image: linear-gradient(var(--radar-border) 1px, transparent 1px), linear-gradient(90deg, var(--radar-border) 1px, transparent 1px); background-size: 40px 40px; opacity: 0.08; }
@keyframes scan { 0% { transform: translateY(-100%); } 100% { transform: translateY(100%); } }

body.light-mode .radar-bg {
  background: radial-gradient(ellipse 85% 85% at 50% 45%, #ffffff 0%, #eef6f1 100%);
}
body.light-mode .scan-line {
  background: linear-gradient(to bottom, transparent 0%, rgba(16, 153, 98, 0.05) 50%, transparent 100%);
}
body.light-mode .vignette {
  background: radial-gradient(ellipse at center, transparent 45%, rgba(77, 116, 95, 0.16) 100%);
}

.header {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.5rem 1rem;
  border-bottom: 1px solid var(--radar-border);
  box-shadow: 0 0 20px var(--radar-green-glow);
}
.title { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.25rem, 3vw, 2rem); letter-spacing: 0.2em; text-shadow: 0 0 14px var(--radar-green-glow); }
.title-sub { display: block; font-size: 0.45em; font-weight: 400; letter-spacing: 0.3em; color: var(--text-dim); margin-top: 0.2rem; }
.status-bar { margin-top: 0.6rem; color: var(--text-dim); }
.status-text { color: var(--radar-green); }

.app-shell { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 1rem 1rem 2rem; display: grid; gap: 1rem; }
.radar-panel { background: var(--radar-panel-bg); border: 1px solid var(--radar-border); border-radius: 8px; padding: 0.9rem; box-shadow: 0 0 20px var(--radar-green-glow), inset 0 0 25px rgba(0,255,136,0.03); }
.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.6rem; color: var(--text-dim); font-size: 0.8rem; letter-spacing: 0.14em; }
.panel-title { color: var(--radar-green); font-family: var(--font-display); }

.control-row { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.6rem; }
.control-row label { min-width: 110px; color: var(--text-dim); font-size: 0.85rem; }
.row-wrap { flex-wrap: wrap; }
input, select {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--radar-border);
  color: var(--radar-green);
  padding: 0.45rem 0.55rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.btn-radar {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  padding: 0.5rem 0.85rem;
  background: transparent;
  color: var(--radar-green);
  border: 1px solid var(--radar-border);
  border-radius: 4px;
  cursor: pointer;
}
.btn-radar:hover { background: var(--radar-green-glow); }
.active-mini { background: var(--radar-green-glow); }
.btn-radar:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.indicator {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  border: 1px solid var(--radar-border);
}
.indicator.ok { color: #042a10; background: var(--radar-green); }
.indicator.fail { color: white; background: #b90830; }
.indicator.unknown { color: var(--text-dim); background: transparent; }

.note-line { color: var(--text-dim); min-height: 1rem; font-size: 0.82rem; }
.list-box {
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--radar-border);
  border-radius: 6px;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.32);
}
.list-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: center;
  padding: 0.45rem;
  border-bottom: 1px solid rgba(0, 255, 136, 0.08);
}

.game-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.game-layout.lower { grid-template-columns: 1fr 1fr; }
.opponent-grids { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0.8rem; }

.radar-grid {
  --cell-size: min(3.2vw, 30px);
  display: grid;
  grid-template-columns: repeat(10, var(--cell-size));
  gap: 2px;
  width: max-content;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--radar-border);
  border-radius: 4px;
  padding: 6px;
}
.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border: 1px solid var(--radar-border);
  background: rgba(0, 255, 136, 0.05);
}
.cell.ship { background: rgba(0, 204, 106, 0.25); border-color: var(--ship-color); }
.cell.hit { background: var(--hit-color); box-shadow: 0 0 12px var(--radar-green-glow); }
.cell.miss { background: var(--miss-color); }
.cell.fireable:hover { cursor: crosshair; background: rgba(0, 255, 136, 0.16); }
.cell.preview-valid {
  background: rgba(0, 255, 136, 0.24);
  box-shadow: inset 0 0 0 1px rgba(0, 255, 136, 0.55);
}
.cell.preview-invalid {
  background: rgba(224, 75, 90, 0.28);
  box-shadow: inset 0 0 0 1px rgba(224, 75, 90, 0.65);
}

.ship-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.35rem 0 0.5rem;
}
.ship-token {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--radar-border);
  border-radius: 5px;
  padding: 0.35rem 0.5rem;
  background: rgba(0, 0, 0, 0.25);
  color: var(--radar-green);
  cursor: grab;
  user-select: none;
}
.ship-token .ship-cells {
  display: inline-flex;
  gap: 2px;
}
.ship-token .ship-cells i {
  width: 10px;
  height: 10px;
  border: 1px solid var(--radar-border);
  background: rgba(0, 204, 106, 0.25);
}
.ship-token.placed {
  opacity: 0.45;
  text-decoration: line-through;
  cursor: not-allowed;
}

.opponent-block h4 { margin-bottom: 0.4rem; color: var(--text-dim); font-size: 0.8rem; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
.stat-item { border: 1px solid var(--radar-border); padding: 0.5rem; border-radius: 5px; text-align: center; }
.stat-value { font-family: var(--font-display); font-size: 1.3rem; display: block; }
.stat-label { color: var(--text-dim); font-size: 0.72rem; }

.explosion { position: fixed; inset: 0; pointer-events: none; z-index: 8; opacity: 0; background: radial-gradient(circle, rgba(0,255,136,0.45) 0%, transparent 60%); }
.explosion.flash { animation: flash 0.35s ease-out; }
@keyframes flash { from { opacity: 0.55; } to { opacity: 0; } }

.result-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(5, 18, 12, 0.6);
}
.result-card {
  width: min(480px, 92vw);
  border: 1px solid var(--radar-border);
  border-radius: 10px;
  padding: 1.1rem;
  text-align: center;
  background: var(--radar-panel-bg);
  box-shadow: 0 0 25px var(--radar-green-glow);
}
.result-card h2 {
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  margin-bottom: 0.55rem;
}
.result-card p {
  color: var(--text-dim);
  margin-bottom: 0.9rem;
}

@media (max-width: 980px) {
  .game-layout, .game-layout.lower { grid-template-columns: 1fr; }
  .radar-grid { --cell-size: min(6.6vw, 30px); }
}