:root {
  color-scheme: dark;
  --bg: #05070a;
  --panel: rgba(9, 13, 20, 0.64);
  --panel-strong: rgba(12, 18, 28, 0.78);
  --line: rgba(255, 255, 255, 0.18);
  --line-strong: rgba(255, 255, 255, 0.28);
  --text: rgba(255, 255, 255, 0.96);
  --muted: rgba(226, 236, 245, 0.68);
  --faint: rgba(226, 236, 245, 0.44);
  --accent: #73ffd8;
  --amber: #f7c96d;
  --danger: #ff6f8d;
  --board: #d8a85a;
  --board-dark: #7f5422;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.44);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Avenir Next", "Trebuchet MS", "Gill Sans", "Segoe UI", sans-serif;
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.11);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

button:not(:disabled) {
  cursor: pointer;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
  border-color: rgba(115, 255, 216, 0.58);
  background: rgba(115, 255, 216, 0.14);
}

button:disabled {
  opacity: 0.46;
}

input {
  min-height: 46px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.24);
  outline: none;
}

input:focus {
  border-color: rgba(115, 255, 216, 0.74);
  box-shadow: 0 0 0 3px rgba(115, 255, 216, 0.12);
}

.game-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(115deg, rgba(9, 13, 20, 0.96), rgba(10, 16, 25, 0.82)),
    url("/assets/wallpapers/default/IMG_2046.webp");
  background-size: cover;
  background-position: center;
}

.game-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.14), rgba(0, 0, 0, 0.62)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 84px);
  backdrop-filter: blur(18px) saturate(128%);
}

.shell {
  width: min(1180px, calc(100vw - 28px));
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 0 22px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 18px;
}

.glass {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.045)),
    var(--panel);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(28px) saturate(148%);
  -webkit-backdrop-filter: blur(28px) saturate(148%);
}

.topbar {
  min-height: 68px;
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, #73ffd8 32%, #0d141a 34%, #05070a 70%);
  box-shadow: 0 0 26px rgba(115, 255, 216, 0.28);
}

.brand strong,
.brand small {
  display: block;
}

.brand small,
.eyebrow,
.connection,
label,
.player-card small {
  color: var(--muted);
}

.connection {
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 13px;
}

.connection.online {
  color: var(--accent);
}

.lobby {
  align-self: center;
  width: min(760px, 100%);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 42px);
  border-radius: 8px;
  display: grid;
  gap: 18px;
}

.lobby-copy h1 {
  margin: 4px 0 10px;
  max-width: 12em;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 0.94;
  letter-spacing: 0;
}

.lobby-copy p {
  margin: 0;
  color: var(--muted);
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lobby-form {
  display: grid;
  gap: 8px;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 132px;
  gap: 10px;
}

.message {
  min-height: 22px;
  margin: 0;
  color: var(--amber);
}

.hidden {
  display: none !important;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 18px;
  align-items: stretch;
}

.board-wrap,
.side-panel {
  border-radius: 8px;
}

.board-wrap {
  min-width: 0;
  padding: clamp(14px, 2vw, 22px);
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
}

.board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.board-head h2,
.status-card h3 {
  margin: 3px 0 0;
}

.turn-badge {
  min-width: 96px;
  padding: 9px 11px;
  border-radius: 8px;
  text-align: center;
  background: rgba(115, 255, 216, 0.12);
  color: var(--accent);
}

.board {
  --cell: min(calc((100vw - 72px) / 15), 42px);
  position: relative;
  width: min(100%, calc(var(--cell) * 15));
  aspect-ratio: 1;
  margin: auto;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background:
    linear-gradient(rgba(87, 52, 16, 0.44) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 52, 16, 0.44) 1px, transparent 1px),
    linear-gradient(135deg, rgba(255, 230, 166, 0.95), rgba(216, 168, 90, 0.98) 48%, rgba(154, 100, 40, 0.98));
  background-size:
    calc(100% / 15) calc(100% / 15),
    calc(100% / 15) calc(100% / 15),
    100% 100%;
  background-position:
    0 0,
    0 0,
    center;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.4),
    inset 0 -18px 50px rgba(72, 36, 7, 0.28),
    0 26px 72px rgba(0, 0, 0, 0.38);
  display: block;
  overflow: visible;
  touch-action: manipulation;
}

.point {
  position: absolute;
  width: calc(100% / 15);
  height: calc(100% / 15);
  border: 0;
  border-radius: 50%;
  background: transparent;
  padding: 0;
  transform: translate(-50%, -50%);
  z-index: 1;
}

.point:hover {
  background: rgba(115, 255, 216, 0.18);
}

.point::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  opacity: 0;
}

.point.black::before,
.point.white::before {
  opacity: 1;
}

.point.black::before {
  background: radial-gradient(circle at 35% 28%, #4d4d4d, #080808 48%, #000);
  box-shadow: 0 7px 12px rgba(0, 0, 0, 0.52);
}

.point.white::before {
  background: radial-gradient(circle at 35% 28%, #fff, #e9e2d2 56%, #bfb7a8);
  box-shadow: 0 7px 12px rgba(0, 0, 0, 0.32);
}

.point.last::after {
  content: "";
  position: absolute;
  inset: 36%;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

.point.win {
  outline: 2px solid rgba(115, 255, 216, 0.9);
  outline-offset: -4px;
}

.side-panel {
  padding: 16px;
  display: grid;
  grid-template-rows: auto auto auto minmax(130px, 1fr);
  gap: 14px;
}

.status-card {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.18);
}

.status-card p:last-child {
  margin: 8px 0 0;
  color: var(--muted);
}

.players {
  display: grid;
  gap: 10px;
}

.player-card {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.stone-mini {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.black .stone-mini {
  background: radial-gradient(circle at 35% 28%, #4d4d4d, #050505 58%);
}

.white .stone-mini {
  background: radial-gradient(circle at 35% 28%, #fff, #ded6c7 58%);
}

.actions {
  display: grid;
  gap: 9px;
}

.danger {
  color: #ffe9ee;
  border-color: rgba(255, 111, 141, 0.4);
  background: rgba(255, 111, 141, 0.12);
}

.event-log {
  margin: 0;
  padding: 12px 12px 12px 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(0, 0, 0, 0.16);
  overflow: auto;
}

.event-log li {
  margin: 0 0 8px;
}

@media (max-width: 880px) {
  .shell {
    width: min(100% - 20px, 680px);
  }

  .topbar {
    align-items: flex-start;
  }

  .game-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    grid-template-rows: auto;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  .lobby-copy h1 {
    max-width: none;
  }
}

@media (max-width: 460px) {
  .topbar {
    padding: 12px;
  }

  .brand strong {
    font-size: 15px;
  }

  .connection {
    font-size: 12px;
  }

  .board-wrap {
    padding: 10px;
  }

  .board-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .board {
    --cell: calc((100vw - 58px) / 15);
  }
}