:root {
  --bg: #061720;
  --bg-deep: #031016;
  --panel: rgba(12, 37, 47, 0.78);
  --panel-solid: #0b2631;
  --line: rgba(146, 188, 198, 0.18);
  --line-strong: rgba(146, 188, 198, 0.35);
  --text: #eef5f3;
  --muted: #91a8ad;
  --accent: #f0bb4d;
  --accent-dark: #a87414;
  --cyan: #65d7d0;
  --danger: #ff765f;
  --water: #0c303d;
  --cell-size: clamp(28px, 6vw, 52px);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 25%, rgba(35, 125, 132, 0.13), transparent 30%),
    radial-gradient(circle at 15% 90%, rgba(240, 187, 77, 0.07), transparent 25%),
    var(--bg);
  font-family: "Manrope", system-ui, sans-serif;
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .12;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E");
}

.topbar {
  width: min(1280px, calc(100% - 40px));
  height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  text-decoration: none;
  font-size: .82rem;
  letter-spacing: .2em;
  font-weight: 800;
}

.brand-mark {
  display: block;
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 0 14px rgba(240, 187, 77, .12);
}

.connection {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font: 500 .72rem "DM Mono", monospace;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.online-stat {
  margin-left: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  color: #78969c;
}
.online-stat strong { color: var(--cyan); font-weight: 500; }

.connection-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.connection.offline .connection-dot {
  background: var(--danger);
  box-shadow: 0 0 12px var(--danger);
}

main {
  width: min(1280px, calc(100% - 40px));
  margin: 0 auto;
}

.hidden { display: none !important; }

.hero {
  min-height: calc(100vh - 84px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 6vw;
  padding: 60px 4vw 100px;
}

.eyebrow, .panel-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font: 500 .72rem "DM Mono", monospace;
  letter-spacing: .17em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3.6rem, 7.2vw, 7rem);
  line-height: .9;
  letter-spacing: -.065em;
  text-transform: uppercase;
}

.hero h1 span {
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
}

.lead {
  max-width: 570px;
  margin: 34px 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.75;
}

.button {
  border: 0;
  border-radius: 8px;
  padding: 15px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  font-weight: 800;
  transition: transform .18s, filter .18s, background .18s;
}

.button:hover:not(:disabled) { transform: translateY(-2px); filter: brightness(1.07); }
.button:active:not(:disabled) { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: .36; }
.button-primary { background: var(--accent); color: #102027; }
.button-secondary { background: rgba(101, 215, 208, .08); border: 1px solid var(--line-strong); }
.button-large { min-width: 260px; justify-content: space-between; padding: 18px 22px; }

.microcopy {
  margin: 14px 0;
  color: #637d83;
  font: .7rem "DM Mono", monospace;
}

.hero-visual { display: grid; place-items: center; }

.radar {
  position: relative;
  width: min(39vw, 490px);
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background:
    linear-gradient(rgba(101, 215, 208, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(101, 215, 208, .06) 1px, transparent 1px),
    radial-gradient(circle, rgba(18, 75, 81, .55), rgba(4, 24, 31, .4));
  background-size: 36px 36px, 36px 36px, auto;
  box-shadow: 0 0 80px rgba(49, 155, 155, .09), inset 0 0 50px rgba(0, 0, 0, .5);
}

.radar::before, .radar::after {
  content: "";
  position: absolute;
  background: rgba(101, 215, 208, .17);
}
.radar::before { width: 1px; height: 100%; left: 50%; }
.radar::after { height: 1px; width: 100%; top: 50%; }

.radar-ring {
  position: absolute;
  inset: 14%;
  border: 1px solid rgba(101, 215, 208, .18);
  border-radius: 50%;
}
.radar-ring-2 { inset: 28%; }
.radar-ring-3 { inset: 42%; }

.radar-sweep {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 78%, rgba(101, 215, 208, .02), rgba(101, 215, 208, .32));
  animation: sweep 5s linear infinite;
}

@keyframes sweep { to { transform: rotate(360deg); } }

.radar-blip {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px 3px rgba(240, 187, 77, .55);
  animation: blink 2.2s infinite;
}
.blip-1 { top: 28%; left: 65%; }
.blip-2 { top: 63%; left: 28%; animation-delay: .7s; }
.blip-3 { top: 72%; left: 68%; animation-delay: 1.3s; }
@keyframes blink { 50% { opacity: .3; } }

.ship-silhouette {
  position: absolute;
  top: 46%;
  left: 28%;
  color: rgba(238, 245, 243, .72);
  letter-spacing: -2px;
  transform: rotate(-24deg);
  text-shadow: 0 4px 20px rgba(0, 0, 0, .8);
}

.radar-label {
  position: absolute;
  right: 14%;
  bottom: 13%;
  color: var(--cyan);
  font: .65rem "DM Mono", monospace;
  letter-spacing: .12em;
}

.game { padding: 42px 0 80px; }
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 32px;
  margin-bottom: 20px;
}
.game-header h2 { margin: 0 0 8px; font-size: clamp(2rem, 4vw, 3.4rem); letter-spacing: -.045em; }
.game.my-turn .game-header h2 {
  color: var(--accent);
  text-shadow: 0 0 22px rgba(240, 187, 77, .2);
}
.status-copy { margin: 0; color: var(--muted); }

.room-card {
  min-width: 250px;
  padding: 13px 14px 13px 18px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(5, 23, 31, .62);
}
.room-card > span { font: .62rem "DM Mono"; color: var(--muted); letter-spacing: .15em; }
.room-card strong { grid-row: 2; font: 500 1.05rem "DM Mono"; letter-spacing: .22em; }
.copy-button {
  grid-column: 2;
  grid-row: 1 / 3;
  height: 42px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  background: rgba(101, 215, 208, .09);
  color: var(--cyan);
  cursor: pointer;
  font-size: .74rem;
  font-weight: 700;
}

.waiting-banner {
  margin: 0 0 20px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  border: 1px solid rgba(240, 187, 77, .2);
  border-radius: 8px;
  color: #e3ca91;
  background: rgba(240, 187, 77, .06);
  font-size: .82rem;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: blink 1.2s infinite;
}

.placement-layout, .battle-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, .65fr);
  gap: 20px;
}

.battle-layout { grid-template-columns: minmax(0, 1.1fr) minmax(320px, .8fr); }

.panel {
  min-width: 0;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(14, 43, 54, .9), rgba(7, 27, 35, .75));
  box-shadow: 0 20px 50px rgba(0, 0, 0, .16);
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.panel-kicker { display: block; margin-bottom: 4px; font-size: .61rem; }
.panel h3 { margin: 0; font-size: 1.2rem; }
.counter {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--cyan);
  font: .7rem "DM Mono";
}

.icon-button {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  color: var(--cyan);
  font-size: 1.25rem;
}

.board-wrap {
  position: relative;
  width: min(calc(var(--cell-size) * 10 + 24px), 100%);
  margin: 14px auto 0;
  padding: 0 0 0 24px;
}

.board {
  width: 100%;
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  border-top: 1px solid rgba(101, 215, 208, .25);
  border-left: 1px solid rgba(101, 215, 208, .25);
  background: var(--water);
  touch-action: manipulation;
}

#placementBoard { touch-action: none; }

.cell {
  position: relative;
  min-width: 0;
  aspect-ratio: 1;
  border: 0;
  border-right: 1px solid rgba(101, 215, 208, .17);
  border-bottom: 1px solid rgba(101, 215, 208, .17);
  background: transparent;
  cursor: pointer;
}
.cell:hover { background: rgba(101, 215, 208, .09); }
.cell.ship {
  background: linear-gradient(135deg, #668087, #344e56);
  box-shadow: inset 0 0 0 2px rgba(202, 222, 221, .15);
}
#placementBoard .cell.ship { cursor: grab; }
#placementBoard .cell.ship:active { cursor: grabbing; }
.cell.preview-valid { background: rgba(101, 215, 208, .34); }
.cell.preview-invalid { background: rgba(255, 118, 95, .32); }
.cell.pending {
  background: rgba(240, 187, 77, .38);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.cell.pending-invalid {
  background: rgba(255, 118, 95, .35);
  box-shadow: inset 0 0 0 2px var(--danger);
}
.cell.miss::after, .cell.hit::after {
  content: "";
  position: absolute;
  width: 24%;
  aspect-ratio: 1;
  left: 38%;
  top: 38%;
  border-radius: 50%;
}
.cell.miss::after { background: #8bb0b7; box-shadow: 0 0 0 3px rgba(139, 176, 183, .13); }
.cell.hit { background: rgba(255, 118, 95, .12); }
.cell.hit::after { width: 34%; left: 33%; top: 33%; background: var(--danger); box-shadow: 0 0 12px rgba(255, 118, 95, .7); }
.cell.sunk {
  z-index: 1;
  background: rgba(255, 118, 95, .42);
  box-shadow:
    inset 0 0 0 2px var(--danger),
    inset 0 0 16px rgba(255, 118, 95, .35);
}
.cell.sunk.hit::after {
  content: "×";
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  border-radius: 0;
  background: transparent;
  color: #fff3ef;
  font: 700 clamp(.72rem, 2.3vw, 1.25rem) "DM Mono", monospace;
  text-shadow: 0 0 7px rgba(255, 118, 95, .95);
  box-shadow: none;
}
.target-board.can-fire .cell:not(.miss):not(.hit):hover { background: rgba(240, 187, 77, .2); }
.target-board:not(.can-fire) .cell { cursor: not-allowed; }

.coordinates {
  position: absolute;
  display: grid;
  color: #6d8d94;
  font: .58rem "DM Mono";
}
.coordinates-top {
  left: 24px;
  bottom: 100%;
  width: calc(100% - 24px);
  grid-template-columns: repeat(10, 1fr);
}
.coordinates-left {
  right: calc(100% - 24px);
  top: 0;
  height: 100%;
  grid-template-rows: repeat(10, 1fr);
}
.coordinates span { display: grid; place-items: center; }

.fleet-list { display: grid; gap: 10px; margin-bottom: 20px; }
.fleet-item {
  width: 100%;
  min-height: 58px;
  padding: 10px 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(5, 22, 29, .4);
  cursor: pointer;
}
.fleet-item.selected { border-color: var(--accent); background: rgba(240, 187, 77, .07); }
.fleet-item.placed { opacity: .42; }
.fleet-name { text-align: left; }
.fleet-name strong { display: block; font-size: .82rem; }
.fleet-name span { color: var(--muted); font-size: .68rem; }
.ship-blocks { display: flex; gap: 3px; }
.ship-blocks i { display: block; width: 14px; height: 7px; border-radius: 1px; background: #75939a; }
.fleet-item.selected .ship-blocks i { background: var(--accent); }
.fleet-help { color: var(--muted); font-size: .74rem; line-height: 1.55; }
.ready-button { width: 100%; margin-top: 13px; }

.placement-actions {
  width: min(calc(var(--cell-size) * 10), calc(100% - 24px));
  margin: 18px auto 0;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid rgba(240, 187, 77, .35);
  border-radius: 9px;
  background: rgba(240, 187, 77, .07);
}
.placement-actions > span {
  color: #e3ca91;
  font-size: .74rem;
}
.placement-actions > div { display: flex; gap: 8px; }
.placement-actions .button { padding: 10px 13px; font-size: .75rem; }
.placement-cancel { background: transparent; border: 1px solid var(--line-strong); }

.result-overlay {
  position: fixed;
  z-index: 10;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(2, 12, 16, .8);
  backdrop-filter: blur(12px);
}
.result-card {
  width: min(430px, 100%);
  padding: 42px;
  text-align: center;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background: var(--panel-solid);
  box-shadow: 0 30px 90px rgba(0, 0, 0, .45);
}
.result-icon { margin: 15px 0; color: var(--accent); font-size: 4rem; }
.result-card h2 { margin: 0; font-size: 3rem; }
.result-card p:not(.eyebrow) { color: var(--muted); line-height: 1.6; }
.result-card .button { width: 100%; margin-top: 12px; }
.text-link { display: inline-block; margin-top: 20px; color: var(--muted); font-size: .78rem; }

.site-footer {
  width: min(1280px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: #637d83;
  font-size: .74rem;
}

.site-footer a,
.site-footer #contactEmail {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

.toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: 24px;
  max-width: calc(100% - 32px);
  padding: 11px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #16323c;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity .2s, transform .2s;
  font-size: .8rem;
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 80px; }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .hero-visual { display: none; }
  .placement-layout, .battle-layout { grid-template-columns: 1fr; }
  .fleet-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
  .fleet-panel .panel-heading, .fleet-list, .fleet-help, .ready-button { grid-column: 1 / -1; }
  .fleet-list { grid-template-columns: 1fr 1fr; }
  .own-board-panel { order: 2; }
}

@media (max-width: 600px) {
  :root { --cell-size: calc((100vw - 76px) / 10); }
  .topbar, main { width: min(100% - 24px, 1280px); }
  .site-footer {
    width: min(100% - 24px, 1280px);
    flex-wrap: wrap;
    justify-content: flex-start;
  }
  .topbar { height: 68px; }
  .connection { gap: 6px; }
  .connection #connectionText { display: none; }
  .online-stat { margin-left: 1px; padding-left: 8px; }
  .hero { min-height: calc(100vh - 68px); padding: 50px 2px 80px; }
  .hero h1 { font-size: clamp(3.15rem, 17vw, 5rem); }
  .lead { margin: 28px 0; line-height: 1.6; }
  .game { padding-top: 26px; }
  .game-header { display: block; }
  .room-card { margin-top: 22px; width: 100%; min-width: 0; }
  .waiting-banner { margin-top: 18px; }
  .panel { padding: 18px 12px 22px; border-radius: 12px; }
  .board-wrap { max-width: 100%; margin-left: auto; margin-right: auto; }
  .fleet-panel { display: block; }
  .fleet-list { display: grid; grid-template-columns: 1fr; }
  .fleet-panel .button-secondary { width: 100%; }
  .battle-layout { gap: 12px; }
  .battle-layout .own-board-panel { padding-bottom: 18px; }
  .result-card { padding: 34px 24px; }
  .placement-actions {
    position: sticky;
    z-index: 3;
    bottom: calc(10px + env(safe-area-inset-bottom));
    width: calc(100% - 12px);
    flex-direction: column;
    align-items: stretch;
    background: rgba(11, 38, 49, .96);
    box-shadow: 0 12px 35px rgba(0, 0, 0, .45);
    backdrop-filter: blur(10px);
  }
  .placement-actions > div { display: grid; grid-template-columns: 1fr 1.4fr; }

  .game.battle-active {
    width: calc(100vw - 8px);
    margin-left: calc(50% - 50vw + 4px);
    padding: 8px 0 max(8px, env(safe-area-inset-bottom));
  }
  .battle-active .game-header {
    display: block;
    margin-bottom: 6px;
  }
  .battle-active .game-header .eyebrow,
  .battle-active .game-header .status-copy,
  .battle-active .room-card {
    display: none;
  }
  .battle-active .game-header h2 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.15;
  }
  .battle-active .waiting-banner {
    margin: 6px 0;
    padding: 7px 10px;
    font-size: .72rem;
  }
  .battle-active .battle-layout {
    gap: 6px;
  }
  .battle-active .battle-layout .board-panel {
    position: relative;
    display: block;
    padding: 7px 4px 8px;
    border-radius: 10px;
  }
  .battle-active .battle-layout .panel-heading {
    position: absolute;
    z-index: 2;
    left: 3px;
    top: 25px;
    bottom: 8px;
    width: 22px;
    height: auto;
    min-height: 0;
    margin: 0;
    padding: 0;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }
  .battle-active .battle-layout .panel-heading > div {
    display: grid;
    place-items: center;
    min-height: 0;
    flex: 1;
  }
  .battle-active .battle-layout .panel-kicker { display: none; }
  .battle-active .battle-layout .panel h3 {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: clamp(.62rem, 2.7vw, .78rem);
    line-height: 1;
    letter-spacing: .055em;
    white-space: nowrap;
  }
  .battle-active .battle-layout .board-wrap {
    width: 100%;
    margin: 2px auto 0;
    padding-left: 24px;
  }
  .battle-active .battle-layout .coordinates {
    font-size: .46rem;
  }
  .battle-active .battle-layout .coordinates-top {
    left: 24px;
    width: calc(100% - 24px);
  }
  .battle-active .battle-layout .coordinates-left {
    right: calc(100% - 24px);
  }
  .battle-active .battle-layout .own-board-panel {
    padding-bottom: 8px;
  }
}

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