:root {
  --bg: #0f0b08;
  --panel: #1b1410;
  --panel-border: #3d2b1f;
  --text: #f6efe6;
  --muted: #b9a995;
  --accent: #5b7fff;
  --accent-soft: rgba(91, 127, 255, 0.16);
  --wood: #c9a66b;
  --success: #7ee787;
  --danger: #ff7b72;
  --radius: 12px;
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(201, 166, 107, 0.12), transparent 35%),
    linear-gradient(180deg, #120d0a, #090605);
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.5;
}

button,
input,
textarea {
  font: inherit;
}

a {
  color: var(--accent);
  text-decoration: none;
}

.app-shell {
  min-height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.app-shell--game .topbar,
.app-shell--game .footer {
  padding-top: 8px;
  padding-bottom: 8px;
}

.app-shell--game .footer {
  font-size: 0.82rem;
}

.topbar,
.game-header,
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  flex-shrink: 0;
}

.game-header {
  padding: 10px 16px;
}

.topbar,
.game-header {
  border-bottom: 1px solid var(--panel-border);
  background: rgba(15, 11, 8, 0.88);
  backdrop-filter: blur(8px);
}

.topbar label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.topbar input,
.link-row input,
.lobby__join textarea {
  width: 100%;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: #120d0a;
  color: var(--text);
  padding: 10px 12px;
}

button {
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  background: var(--accent);
  color: white;
}

button.secondary,
button.ghost {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text);
}

button.ghost {
  border-radius: 8px;
}

.lobby {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  padding: 32px 24px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.lobby-layout {
  flex: 1;
}

.lobby__history {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

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

.lobby__history-head h2 {
  margin: 0;
  font-size: 1.35rem;
}

.lobby__history-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.lobby__games h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.game-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.game-list__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--panel-border);
}

.game-list__item:first-child {
  border-top: none;
  padding-top: 0;
}

.game-list__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.game-list__meta strong {
  font-size: 0.95rem;
  word-break: break-all;
}

.lobby__hero,
.lobby__join,
.panel,
.link-panel {
  background: rgba(27, 20, 16, 0.92);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--wood);
  font-size: 0.78rem;
  font-weight: 700;
}

.lobby h1,
.game-header h2 {
  margin: 0 0 8px;
  font-size: 2.2rem;
}

.game-header h2 {
  font-size: 1.45rem;
  margin-bottom: 4px;
}

.game-header .status-line {
  margin: 0;
  font-size: 0.88rem;
}

.game-layout {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  overflow: hidden;
}

.game-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.8fr);
  grid-template-rows: minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

.board-3d {
  height: 100%;
  min-height: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--panel-border);
  background: #120d0a;
  position: relative;
}

.board-3d--interactive {
  cursor: pointer;
}

.board-3d__hint {
  position: absolute;
  left: 12px;
  bottom: 12px;
  margin: 0;
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.55);
  color: var(--muted);
  font-size: 0.82rem;
  pointer-events: none;
  z-index: 2;
}

.move-panel__status {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.move-panel__selected {
  margin: 0 0 12px;
}

.mini-board {
  display: inline-block;
  border: 2px solid var(--panel-border);
  border-radius: 6px;
  overflow: hidden;
}

.mini-board__row {
  display: flex;
  align-items: center;
}

.mini-board__rank {
  width: 18px;
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
  background: rgba(0, 0, 0, 0.25);
}

.mini-board__files {
  display: grid;
  grid-template-columns: 18px repeat(8, 36px);
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  background: rgba(0, 0, 0, 0.25);
}

.mini-board__file {
  line-height: 18px;
}

.mini-board__sq {
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 0;
  font-size: 1.35rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: inherit;
}

.mini-board__sq.light {
  background: #c9a66b;
}

.mini-board__sq.dark {
  background: #6b4423;
}

.mini-board__piece {
  pointer-events: none;
  line-height: 1;
}

.mini-board__piece--w {
  color: #f6efe6;
  text-shadow: 0 0 2px #1a1410, 0 1px 3px #1a1410;
}

.mini-board__piece--b {
  color: #1a1410;
  text-shadow: 0 0 1px rgba(246, 239, 230, 0.55);
}

.mini-board__sq.selected {
  box-shadow: inset 0 0 0 3px var(--accent);
}

.mini-board__sq.target {
  box-shadow: inset 0 0 0 3px var(--success);
}

.mini-board__sq:disabled {
  cursor: default;
  opacity: 0.85;
}

.move-targets {
  margin-top: 14px;
}

.move-targets__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.move-targets__list button {
  font-size: 0.85rem;
  padding: 6px 12px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 2px;
}

.panel h3,
.panel h4,
.link-panel h3 {
  margin: 0 0 10px;
}

.link-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.link-panel__head h3 {
  margin: 0;
}

.link-panel__toggle {
  flex-shrink: 0;
  padding: 6px 12px;
  font-size: 0.85rem;
}

.link-panel__summary {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.link-panel--collapsed .link-panel__head {
  margin-bottom: 6px;
}

.link-panel--collapsed .link-panel__body {
  display: none;
}

.link-panel--prominent.link-panel--collapsed {
  padding: 12px 16px;
}

.panel ul,
.panel ol,
.moves ol {
  margin: 0;
  padding-left: 1.2rem;
}

.muted {
  color: var(--muted);
}

.badge,
.notice,
.status-line {
  color: var(--muted);
}

.notice {
  flex-shrink: 0;
  margin: 0 0 10px;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: #dbe4ff;
  font-size: 0.92rem;
}

.link-panel__hint {
  color: var(--muted);
  margin-top: 0;
}

.link-row {
  display: grid;
  grid-template-columns: 120px 1fr auto auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.link-panel--prominent {
  flex-shrink: 0;
  margin-bottom: 10px;
  border-color: var(--wood);
  background: rgba(201, 166, 107, 0.08);
}

.link-panel--prominent h3 {
  color: var(--wood);
}

.link-row input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.link-row label {
  color: var(--muted);
  font-size: 0.92rem;
}

.lobby__nickname {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 20px 0;
  color: var(--muted);
}

.join-gate {
  display: flex;
  justify-content: center;
  padding: 40px 20px 64px;
}

.join-gate__card {
  width: min(100%, 520px);
}

.join-gate__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 20px 0;
  color: var(--muted);
}

.join-gate__field input {
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: #120d0a;
  color: var(--text);
  padding: 12px 14px;
  font-size: 1.05rem;
}

.join-gate__actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.topbar__hint,
.topbar__player {
  color: var(--muted);
  font-size: 0.95rem;
}

.error-panel {
  max-width: 640px;
  margin: 40px auto;
}

.footer {
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--panel-border);
}

@media (max-width: 960px) {
  .lobby,
  .lobby__history-grid,
  .game-grid,
  .link-row {
    grid-template-columns: 1fr;
  }

  .app-shell--game {
    overflow-y: auto;
  }

  .game-layout {
    overflow: visible;
    min-height: auto;
  }

  .game-grid {
    grid-template-rows: minmax(280px, 42dvh) auto;
  }

  .board-3d {
    min-height: 280px;
  }
}

.resume-panel {
  margin: 0 16px 12px;
}

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

.resume-panel__phase {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.resume-panel__hint,
.resume-panel__ready,
.resume-panel__actions,
.resume-panel__buttons {
  margin-top: 12px;
}

.resume-panel__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.resume-panel__ready input,
.resume-panel__backup textarea {
  width: 100%;
  margin-top: 8px;
}

.error-inline {
  color: var(--danger);
}