:root {
  --bg: #071019;
  --bg-deep: #02070d;
  --panel: rgba(7, 16, 25, 0.72);
  --panel-strong: rgba(12, 24, 37, 0.88);
  --panel-border: rgba(255, 255, 255, 0.12);
  --text: #f7f1e8;
  --muted: #9fb1c2;
  --accent: #ff715b;
  --accent-soft: rgba(255, 113, 91, 0.18);
  --accent-alt: #4fd1c5;
  --accent-warm: #ffd166;
  --canvas: #f7f1e8;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: "Space Grotesk", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 113, 91, 0.26), transparent 35%),
    radial-gradient(circle at 80% 18%, rgba(79, 209, 197, 0.16), transparent 28%),
    radial-gradient(circle at 50% 80%, rgba(255, 209, 102, 0.12), transparent 32%),
    linear-gradient(160deg, #06101a 0%, #091726 46%, #03070e 100%);
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.orb,
.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
}

.orb {
  filter: blur(80px);
  opacity: 0.55;
}

.orb-one {
  background: radial-gradient(circle, rgba(255, 113, 91, 0.42), transparent 55%);
  transform: translate(-25%, -10%);
}

.orb-two {
  background: radial-gradient(circle, rgba(79, 209, 197, 0.28), transparent 55%);
  transform: translate(35%, 28%);
}

.noise {
  opacity: 0.06;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
}

.shell {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  padding: 28px;
}

.auth-screen,
.app-shell {
  animation: rise-in 540ms ease;
}

.auth-screen {
  min-height: calc(100svh - 56px);
  display: grid;
  grid-template-columns: 1.2fr minmax(320px, 420px);
  gap: 24px;
}

.auth-poster,
.join-panel,
.panel,
.app-header {
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow);
}

.auth-poster {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 4vw, 56px);
  border-radius: 34px;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    radial-gradient(circle at 18% 18%, rgba(255, 113, 91, 0.24), transparent 26%),
    linear-gradient(135deg, rgba(3, 10, 17, 0.72), rgba(7, 16, 25, 0.44));
}

.auth-poster h1 {
  margin: 14px 0 18px;
  font-family: "Instrument Serif", serif;
  font-size: clamp(3.8rem, 8vw, 7.2rem);
  line-height: 0.92;
  font-weight: 400;
  letter-spacing: -0.04em;
}

.auth-poster h1 span {
  display: block;
  color: var(--accent-warm);
}

.auth-copy {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.feature-strip span,
.room-badge,
.connection-pill,
.presence-chip,
.eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature-strip span,
.room-badge,
.presence-chip {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
}

.join-panel {
  display: grid;
  gap: 22px;
  align-content: center;
  padding: 34px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(6, 13, 22, 0.9), rgba(8, 19, 30, 0.82));
}

.join-panel h2,
.app-title,
.panel h3 {
  margin: 10px 0 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.app-title {
  font-size: 1.8rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  color: var(--muted);
}

.panel-copy,
.hint {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.size-control span {
  font-size: 0.88rem;
  color: var(--muted);
}

.field input,
#share-link,
#chat-input,
#snapshot-name-input,
#snapshot-select {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 16px;
  padding: 15px 16px;
  outline: none;
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.field input:focus,
#chat-input:focus,
#share-link:focus,
#snapshot-name-input:focus,
#snapshot-select:focus {
  border-color: rgba(255, 113, 91, 0.7);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.primary-button,
.ghost-button,
.tab-button,
.reaction-button,
.ttt-cell {
  border: 0;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, opacity 180ms ease;
}

.primary-button {
  padding: 15px 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), #ff8d66);
  color: #170905;
  font-weight: 700;
}

.primary-button:hover,
.ghost-button:hover,
.tab-button:hover,
.reaction-button:hover,
.ttt-cell:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.ghost-button:disabled,
.tab-button:disabled,
.reaction-button:disabled,
.ttt-cell:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.primary-button.compact {
  padding-inline: 16px;
  min-width: 110px;
}

.ghost-button,
.tab-button {
  padding: 12px 15px;
  border-radius: 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.ghost-button.active,
.tab-button.active {
  border-color: rgba(255, 113, 91, 0.6);
  background: rgba(255, 113, 91, 0.14);
}

.app-shell {
  display: grid;
  gap: 22px;
}

.room-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.view-stack {
  display: grid;
}

.view-page {
  display: none;
}

.view-page.active {
  display: grid;
  gap: 22px;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) auto;
  gap: 20px;
  align-items: end;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.hub-card {
  display: grid;
  gap: 14px;
  align-content: start;
  min-height: 220px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-radius: 24px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.share-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.room-badge {
  color: var(--accent-warm);
}

.room-badge.subtle {
  color: var(--muted);
}

#share-link {
  min-width: min(360px, 56vw);
}

.connection-pill {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(79, 209, 197, 0.14);
  border: 1px solid rgba(79, 209, 197, 0.32);
  font-size: 0.76rem;
}

.connection-pill.offline {
  background: rgba(255, 113, 91, 0.14);
  border-color: rgba(255, 113, 91, 0.3);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(320px, 1.2fr) minmax(320px, 1fr);
  gap: 22px;
}

.panel {
  min-height: 0;
  border-radius: 28px;
  padding: 22px;
  background: linear-gradient(180deg, rgba(9, 20, 31, 0.92), rgba(8, 17, 27, 0.78));
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.presence-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.presence-chip {
  color: var(--accent-alt);
}

.chat-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 74svh;
}

.messages {
  display: grid;
  align-content: start;
  gap: 12px;
  overflow: auto;
  padding-right: 8px;
}

.message {
  max-width: 88%;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.message.mine {
  justify-self: end;
  background: rgba(255, 113, 91, 0.15);
  border-color: rgba(255, 113, 91, 0.2);
}

.message-name {
  display: block;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: var(--accent-warm);
}

.message-time {
  display: block;
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--muted);
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 16px;
}

.draw-panel {
  display: grid;
  grid-template-rows: auto auto auto auto 1fr;
  gap: 18px;
  min-height: 76svh;
}

.toolbar {
  display: grid;
  gap: 14px;
}

.advanced-toolbar {
  padding: 16px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.board-toolbar,
.snapshot-row {
  display: grid;
  gap: 12px;
  align-items: center;
}

.board-toolbar {
  grid-template-columns: minmax(0, 1fr) auto;
}

.snapshot-row {
  grid-template-columns: minmax(160px, 1fr) auto minmax(180px, 220px) auto;
}

.board-tabs,
.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.board-tab {
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.board-tab.active {
  border-color: rgba(79, 209, 197, 0.5);
  background: rgba(79, 209, 197, 0.12);
}

.color-row,
.tool-row,
.action-row,
.score-row,
.duel-lanes {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.16);
  background: var(--swatch);
}

.color-swatch.active {
  border-color: white;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
}

.tool-row.compact {
  justify-content: flex-end;
}

.color-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(160px, 220px);
  gap: 12px;
  align-items: center;
}

.color-picker-field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.color-picker-field input[type="color"] {
  width: 58px;
  height: 38px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  border-radius: 12px;
}

.size-control {
  display: grid;
  gap: 8px;
}

.size-control input {
  width: 100%;
}

.asset-row {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.board-hint {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.4;
}

.canvas-wrap {
  position: relative;
  min-height: 480px;
  border-radius: 24px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(247, 241, 232, 0.98), rgba(244, 235, 223, 0.98)),
    linear-gradient(90deg, rgba(7, 16, 25, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(7, 16, 25, 0.08) 1px, transparent 1px);
}

#draw-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.cursor-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.live-cursor {
  position: absolute;
  display: grid;
  gap: 4px;
  transform: translate(-50%, -50%);
  z-index: 2;
}

.live-cursor::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--cursor-color, var(--accent-alt));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--cursor-color, var(--accent-alt)) 20%, transparent);
}

.live-cursor span {
  width: max-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(7, 16, 25, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: 0.74rem;
}

.games-panel {
  display: grid;
  gap: 18px;
  min-height: 72svh;
}

.game-tabs {
  display: flex;
  gap: 10px;
}

.game-pane {
  display: grid;
  gap: 18px;
}

.game-status {
  margin: 0;
  color: var(--muted);
  min-height: 24px;
}

.score-item,
.lane {
  flex: 1 1 0;
  min-width: 96px;
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.score-item.middle {
  background: rgba(255, 209, 102, 0.08);
}

.score-item span,
.lane span {
  display: block;
  font-size: 0.76rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.score-item strong,
.lane strong {
  display: block;
  margin-top: 8px;
  font-size: 1.6rem;
}

.score-item small,
.lane small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.ttt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(80px, 1fr));
  gap: 10px;
}

.ttt-cell {
  aspect-ratio: 1;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.reaction-button {
  min-height: 164px;
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(255, 113, 91, 0.2), rgba(79, 209, 197, 0.2)),
    rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 700;
}

.reaction-button.live {
  background: linear-gradient(135deg, #ffd166, #ff715b);
  color: #1a0a07;
}

.sudoku-panel {
  display: grid;
  gap: 18px;
}

.sudoku-topbar,
.difficulty-row,
.mode-switch {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sudoku-topbar {
  justify-content: space-between;
  align-items: center;
}

.sudoku-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card,
.sudoku-note-box {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.metric-card span {
  display: block;
  font-size: 0.76rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.7rem;
}

.metric-card small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.sudoku-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.58fr);
  gap: 18px;
  align-items: start;
}

.sudoku-board-wrap {
  padding: 16px;
  border-radius: 26px;
  background:
    radial-gradient(circle at top left, rgba(255, 209, 102, 0.12), transparent 28%),
    rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 0;
  border: 3px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
}

.sudoku-cell {
  aspect-ratio: 1;
  border-radius: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: clamp(1rem, 2.8vw, 1.45rem);
  font-weight: 700;
}

.sudoku-cell[data-col="2"],
.sudoku-cell[data-col="5"] {
  border-right-width: 3px;
  border-right-color: rgba(255, 255, 255, 0.18);
}

.sudoku-cell[data-row="2"],
.sudoku-cell[data-row="5"] {
  border-bottom-width: 3px;
  border-bottom-color: rgba(255, 255, 255, 0.18);
}

.sudoku-cell.given {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-warm);
}

.sudoku-cell.filled {
  color: var(--accent-alt);
}

.sudoku-cell.selected {
  background: rgba(255, 113, 91, 0.18);
  box-shadow: inset 0 0 0 2px rgba(255, 113, 91, 0.45);
}

.sudoku-cell.related {
  background: rgba(255, 255, 255, 0.07);
}

.sudoku-cell.flash-wrong {
  background: rgba(255, 113, 91, 0.32);
}

.sudoku-cell.flash-right {
  background: rgba(79, 209, 197, 0.22);
}

.sudoku-sidebar {
  display: grid;
  gap: 16px;
}

.digit-pad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.digit-pad .ghost-button {
  min-height: 58px;
  font-size: 1.2rem;
  font-weight: 700;
}

.digit-pad .ghost-button.wide {
  grid-column: 1 / -1;
}

.hidden {
  display: none !important;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  padding: 14px 18px;
  border-radius: 16px;
  background: rgba(9, 20, 31, 0.94);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow);
  z-index: 10;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .chat-panel {
    min-height: 420px;
  }

  .canvas-wrap {
    min-height: 420px;
  }

  .hub-grid,
  .sudoku-metrics,
  .sudoku-layout {
    grid-template-columns: 1fr;
  }

  .snapshot-row,
  .color-tools,
  .asset-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .shell {
    padding: 18px;
  }

  .auth-screen {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .home-hero {
    grid-template-columns: 1fr;
  }

  .header-actions,
  .share-cluster {
    width: 100%;
  }

  #share-link {
    min-width: 0;
    flex: 1 1 240px;
  }

  .board-toolbar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 14px;
  }

  .auth-poster,
  .join-panel,
  .panel,
  .app-header {
    border-radius: 22px;
  }

  .auth-poster h1 {
    font-size: 3.4rem;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }

  .room-nav,
  .tool-row,
  .preset-row,
  .board-tabs,
  .difficulty-row,
  .mode-switch {
    gap: 8px;
  }

  .hub-grid {
    grid-template-columns: 1fr;
  }

  .sudoku-cell {
    font-size: 1rem;
  }

  .ttt-grid {
    grid-template-columns: repeat(3, minmax(72px, 1fr));
  }

  .reaction-button {
    min-height: 132px;
  }
}