/* BattleChess — design tokens */
:root {
  --bg-deep: #0c0e1a;
  --bg: #12152a;
  --bg-elevated: #1a1f38;
  --bg-card: #1e2442;
  --bg-input: #0f1222;

  --accent: #e94560;
  --accent-hover: #ff5c77;
  --accent-soft: rgba(233, 69, 96, 0.14);
  --accent-glow: rgba(233, 69, 96, 0.35);

  --blue: #5b8def;
  --blue-soft: rgba(91, 141, 239, 0.15);
  --blue-bright: #93c5fd;

  --text: #eef0f8;
  --text-muted: #9aa3c7;
  --text-dim: #6b7394;

  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;

  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);

  --sq-size: clamp(2.35rem, 11.2vw, 3.1rem);
  --board-width: calc(8 * var(--sq-size) + 4px);

  --font: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;

  --header-h: 3.5rem;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -30%, rgba(91, 141, 239, 0.12), transparent 55%),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(233, 69, 96, 0.06), transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
}

a {
  color: var(--blue-bright);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: var(--header-h);
  padding: 0.5rem 1rem;
  padding-top: max(0.5rem, env(safe-area-inset-top));
  background: rgba(18, 21, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-menu-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.nav-menu-icon {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--blue) 100%);
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 0.75rem;
}

.site-nav a:not(.btn) {
  padding: 0.4rem 0.65rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.site-nav a:not(.btn):hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-logout {
  display: inline;
  margin: 0;
}

@media (max-width: 767px) {
  .nav-menu-btn {
    display: flex;
    flex-shrink: 0;
    position: relative;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0.35rem 0.75rem 0.75rem;
    background: rgba(18, 21, 42, 0.97);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a:not(.btn),
  .site-nav .btn {
    width: 100%;
    justify-content: flex-start;
    min-height: 2.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    text-align: left;
  }

  .site-nav a:not(.btn) {
    display: flex;
    align-items: center;
  }

  .nav-logout {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding-top: 0.25rem;
    border-top: 1px solid var(--border);
  }

  .nav-logout .btn-block-nav {
    width: 100%;
    justify-content: center;
  }
}

/* Layout */
.page-main {
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.25rem 1rem calc(2rem + var(--safe-bottom));
}

.page-main:has(.page-game) {
  max-width: min(100%, calc(var(--board-width) + 2rem));
  overflow-x: auto;
}

.page-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-header {
  margin-bottom: 0.25rem;
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-subtitle,
.auth-lead,
.card-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-dim);
}

.breadcrumb a {
  color: var(--text-muted);
}

/* Cards */
.card {
  padding: 1.15rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-flat {
  box-shadow: none;
  background: var(--bg-elevated);
}

.card-highlight {
  border-color: rgba(233, 69, 96, 0.25);
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(233, 69, 96, 0.06) 100%);
}

.card-title {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.card + .card,
.card + section.card {
  margin-top: 0;
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-display);
}

.error,
.alert-error {
  margin: 0 0 0.75rem;
  padding: 0.65rem 0.85rem;
  color: #fecaca;
  font-size: 0.9rem;
  background: rgba(233, 69, 96, 0.12);
  border: 1px solid rgba(233, 69, 96, 0.35);
  border-radius: var(--radius-sm);
}

.move-error {
  display: block;
  margin: 0.5rem 0 0;
  color: var(--accent);
  font-size: 0.9rem;
}

.empty-state {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
  text-decoration: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #c73a52 100%);
  border-color: transparent;
  box-shadow: 0 2px 14px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
  color: #fff;
}

.btn-secondary {
  color: var(--blue-bright);
  background: var(--blue-soft);
  border-color: rgba(91, 141, 239, 0.35);
}

.btn-secondary:hover {
  background: rgba(91, 141, 239, 0.25);
  color: #fff;
}

.btn-ghost {
  color: var(--text-muted);
  background: transparent;
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.75rem 1.35rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* Forms */
.form-stack {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.field-inline {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.field-inline .field-label {
  margin: 0;
}

.optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-dim);
}

input,
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239aa3c7'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

/* Auth */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100dvh - var(--header-h) - 4rem);
  padding: 1rem 0;
}

.auth-card {
  width: 100%;
  max-width: 22rem;
}

.auth-card h1 {
  margin: 0 0 0.5rem;
  font-size: 1.65rem;
}

.auth-footer {
  margin: 1.25rem 0 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Invites */
.invite {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}

.invite:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.invite:first-of-type {
  padding-top: 0;
}

.invite-body {
  flex: 1;
  min-width: 0;
}

.invite-main {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.invite-message {
  margin: 0 0 0.35rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.invite-sent-on {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.invite-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.invite-actions form {
  display: inline;
  margin: 0;
}

.invite-status {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 999px;
}

.invite-status-pending {
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.15);
}

.invite-status-accepted {
  color: #86efac;
  background: rgba(74, 222, 128, 0.12);
}

.invite-status-declined {
  color: #fca5a5;
  background: rgba(248, 113, 113, 0.12);
}

@media (min-width: 520px) {
  .invite {
    flex-direction: row;
    align-items: flex-start;
  }
}

/* Game links (lobby) */
.game-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.game-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  padding: 0.85rem 0;
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.game-link:last-child {
  border-bottom: none;
}

.game-link:hover {
  color: inherit;
}

.game-link-opponent {
  font-weight: 600;
  color: var(--text);
}

.game-link-meta {
  font-size: 0.85rem;
  color: var(--accent);
}

/* Archive */
/* Leaderboard */
.leaderboard-card {
  padding: 0.35rem 0;
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.65rem 1.1rem;
  border-bottom: 1px solid var(--border);
}

.leaderboard-row:last-child {
  border-bottom: none;
}

.leaderboard-row-you {
  background: var(--blue-soft);
}

.leaderboard-rank {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-dim);
  text-align: right;
}

.leaderboard-row:nth-child(1) .leaderboard-rank {
  color: #f0c14b;
}

.leaderboard-row:nth-child(2) .leaderboard-rank {
  color: #c0c5d8;
}

.leaderboard-row:nth-child(3) .leaderboard-rank {
  color: #cd7f32;
}

.leaderboard-name {
  font-size: 0.95rem;
  color: var(--text);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-elo {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--blue-bright);
  white-space: nowrap;
}

.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.archive-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
}

.archive-item-main {
  flex: 1;
  min-width: 0;
}

.archive-match {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.archive-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.archive-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  padding: 1rem;
  margin-top: 0.5rem;
}

.archive-page-info {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
}

@media (min-width: 480px) {
  .archive-item {
    flex-direction: row;
    align-items: center;
  }
}

/* Replay */
.page-replay.page-game {
  align-items: center;
  width: 100%;
}

.page-replay .page-header {
  text-align: center;
  width: 100%;
}

.page-main:has(.page-replay) {
  max-width: min(100%, calc(var(--board-width) + 2rem));
}

.replay-workspace {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
}

.replay-sidebar {
  width: 100%;
}

.replay-matchup {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 0.65rem;
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 4vw, 1.65rem);
  font-weight: 700;
  line-height: 1.25;
}

.replay-player {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.replay-player-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.2;
}

.replay-player-white .replay-player-info {
  align-items: flex-start;
}

.replay-player-black .replay-player-info {
  align-items: flex-end;
}

.replay-player-name {
  white-space: nowrap;
}

.replay-player-color {
  font-family: var(--font);
  font-size: 0.52em;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.replay-badge {
  flex-shrink: 0;
  font-size: 0.95em;
  line-height: 1;
}

.replay-vs {
  font-size: 0.85em;
  font-weight: 600;
  color: var(--text-muted);
}

.replay-meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.replay-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0;
}

.replay-board-stage {
  position: relative;
  width: var(--board-width);
  max-width: 100%;
}

.replay-edge-nav {
  display: none;
}

@media (max-width: 767px) {
  .replay-edge-nav {
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    width: 34%;
    z-index: 10;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  .replay-edge-prev {
    left: 0;
  }

  .replay-edge-next {
    right: 0;
  }

  .replay-edge-nav:active:not(:disabled) {
    background: rgba(255, 255, 255, 0.07);
  }

  .replay-edge-nav:disabled {
    cursor: default;
    pointer-events: none;
  }
}

.replay-transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.replay-counter {
  min-width: 5.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
  color: var(--text-muted);
}

.replay-move-label {
  width: 100%;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.replay-trace-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
}

.replay-trace-toggle input {
  width: auto;
  accent-color: var(--accent);
}

/* Game page */
.page-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  --board-width: calc(8 * var(--sq-size) + 4px);
}

.game-status-bar {
  width: 100%;
  max-width: var(--board-width);
  margin-bottom: 0.75rem;
  padding: 0.65rem 0.9rem;
  text-align: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.game-status-bar p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.game-status-bar strong {
  color: var(--text);
}

.game-status-bar em {
  color: var(--accent);
  font-style: normal;
  font-weight: 600;
}

.game-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: 100%;
  max-width: var(--board-width);
  margin-top: 0.75rem;
  padding-bottom: var(--safe-bottom);
}

.move-hint {
  margin: 0;
  width: 100%;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.move-ui {
  width: 100%;
  text-align: center;
}

.promotion-prompt {
  margin: 0 0 0.5rem;
  width: 100%;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.promotion-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.promotion-btns form,
.resign-form,
.quit-waiting-form {
  display: inline;
  margin: 0;
}

/* Board */
.board-scene {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100vw;
  margin: 0.25rem 0;
}

/* Sized to match squares; overlay must not use max-width:100% (clips on desktop) */
.board-stack {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  width: var(--board-width);
  margin-inline: auto;
  flex-shrink: 0;
}

.board {
  display: inline-block;
  border: 3px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.rank {
  display: flex;
}

.sq {
  position: relative;
  width: var(--sq-size);
  height: var(--sq-size);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.sq-coord {
  position: absolute;
  font-size: clamp(0.45rem, 2.2vw, 0.62rem);
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 4;
}

.sq-coord-rank {
  top: 0.1em;
  left: 0.14em;
}

.sq-coord-file {
  right: 0.14em;
  bottom: 0.1em;
}

.sq.light .sq-coord {
  color: rgba(26, 21, 16, 0.5);
}

.sq.dark .sq-coord {
  color: rgba(245, 240, 232, 0.55);
}

.sq.fog .sq-coord {
  z-index: 5;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.sq.fog.light .sq-coord {
  color: rgba(245, 240, 232, 0.62);
}

.sq.fog.dark .sq-coord {
  color: rgba(238, 235, 228, 0.65);
}

.sq.light {
  background: #d4bc96;
  color: #1a1510;
}

.sq.dark {
  background: #7a6349;
  color: #f5f0e8;
}

.sq .piece {
  position: relative;
  z-index: 1;
  font-size: clamp(1.35rem, 6.5vw, 1.85rem);
  font-weight: 700;
  text-transform: uppercase;
  user-select: none;
}

.piece.white {
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.85);
}

.piece.black {
  color: #1a1510;
}

.sq .fog-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    155deg,
    rgba(14, 12, 32, 0.82) 0%,
    rgba(8, 10, 24, 0.92) 100%
  );
  pointer-events: none;
}

.sq.fog.light .fog-overlay {
  background: linear-gradient(
    155deg,
    rgba(18, 16, 40, 0.78) 0%,
    rgba(10, 12, 28, 0.88) 100%
  );
}

.sq.move-target::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 35%;
  height: 35%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  z-index: 3;
  background: rgba(147, 197, 253, 0.22);
  pointer-events: none;
}

.sq.fog.move-target::after {
  background: rgba(147, 197, 253, 0.16);
}

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

.sq.selected::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  background: var(--accent-soft);
  pointer-events: none;
}

.replay-scene .sq {
  cursor: default;
}

.replay-scene .board {
  position: relative;
}

.replay-scene .replay-move-arrow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  pointer-events: none;
  color: var(--accent);
}

.replay-scene .replay-move-arrow .move-played {
  stroke: var(--accent);
}

.replay-scene .replay-move-arrow .move-ghost {
  stroke: var(--accent);
  stroke-opacity: 0.45;
}

.replay-scene .replay-move-arrow .move-arrowhead {
  fill: var(--accent);
}

.replay-scene .replay-move-arrow .move-arrowhead-ghost {
  fill-opacity: 0.45;
}

/* Captured trays */
.captured-tray {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem 0.35rem;
  width: 100%;
  min-height: 1.85rem;
  padding: 0.4rem 0.55rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.captured-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 0.15rem;
}

.captured-empty {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.captured-piece {
  font-size: clamp(1rem, 4vw, 1.3rem);
  font-weight: 700;
  line-height: 1;
}

.captured-piece.white {
  color: #fff;
  text-shadow: 0 1px 2px #000;
}

.captured-piece.black {
  color: #1a1510;
  background: #d4bc96;
  border-radius: 3px;
  padding: 0 0.12rem;
}

/* Game modal: covers full board-stack (trays + board) */
.game-modal {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
  pointer-events: none;
}

.game-modal:empty {
  display: none;
}

.game-modal:not(:empty) {
  pointer-events: auto;
}

.game-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 10, 22, 0.88);
  border-radius: var(--radius);
}

.game-modal-content {
  position: relative;
  z-index: 1;
  pointer-events: auto;
}

.game-over-panel,
.waiting-panel {
  text-align: center;
  width: min(100%, 20rem);
  padding: 1.5rem 1.35rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.game-over-panel {
  border: 1px solid rgba(233, 69, 96, 0.4);
}

.waiting-panel {
  border: 1px solid rgba(91, 141, 239, 0.4);
}

.game-over-title,
.waiting-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.game-over-title {
  color: var(--accent);
}

.waiting-title {
  color: var(--blue-bright);
}

.game-over-detail,
.waiting-detail {
  margin: 0 0 1.15rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.game-over-elo {
  margin: -0.35rem 0 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--blue-bright);
}

.elo-badge {
  font-weight: 600;
  color: var(--blue-bright);
}

.panel-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.panel-actions .btn {
  width: 100%;
}

@media (min-width: 360px) {
  .panel-actions {
    flex-direction: row;
    justify-content: center;
  }

  .panel-actions .btn {
    width: auto;
    flex: 1;
    min-width: 0;
  }
}

@media (min-width: 768px) {
  .game-over-panel,
  .waiting-panel {
    width: min(100%, 34rem);
    padding: 1.75rem 2rem;
  }

  .game-over-title,
  .waiting-title {
    font-size: 1.55rem;
  }

  .game-over-detail,
  .waiting-detail {
    font-size: 1rem;
  }
}

/* Touch-friendly minimums */
@media (max-width: 480px) {
  .btn-sm {
    min-height: 2.5rem;
  }

  .btn-lg {
    min-height: 3rem;
  }

  .sq {
    touch-action: manipulation;
  }
}

/* Desktop board size (game + replay); mobile keeps :root --sq-size */
@media (min-width: 768px) {
  :root {
    --sq-size: clamp(3.2rem, 7.5vmin, 5.85rem);
    --board-width: calc(8 * var(--sq-size) + 4px);
  }

  .page-main:has(.page-game) {
    max-width: min(96vw, calc(var(--board-width) + 2.5rem));
  }

  .page-main:has(.page-replay) {
    max-width: min(96vw, 88rem);
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  #replay-root.page-replay .page-header {
    width: 100%;
    max-width: min(96vw, 88rem);
    margin-inline: auto;
  }

  #replay-root.page-replay .replay-workspace {
    position: relative;
    width: 100%;
    max-width: none;
    margin-inline: 0;
  }

  #replay-root.page-replay {
    --replay-panel-gap: 0.5rem;
  }

  #replay-root.page-replay .replay-sidebar {
    position: absolute;
    top: 0;
    left: max(
      0.5rem,
      calc(50% - var(--board-width) / 2 - 18rem - var(--replay-panel-gap))
    );
    width: 18rem;
    z-index: 2;
  }

  #replay-root.page-replay .board-scene.replay-scene {
    width: auto;
    max-width: none;
    margin-inline: auto;
    gap: 0.4rem;
  }

  #replay-root.page-replay .replay-transport {
    flex-wrap: nowrap;
    justify-content: center;
    gap: 0.25rem;
  }

  #replay-root.page-replay .replay-transport .btn-sm {
    flex: 0 0 auto;
    min-width: 2.1rem;
    padding: 0.4rem 0.45rem;
  }

  #replay-root.page-replay .replay-counter {
    flex: 0 1 auto;
    min-width: 0;
    padding: 0 0.15rem;
    font-size: 0.8rem;
    white-space: nowrap;
  }

  .sq-coord {
    font-size: clamp(0.9rem, 4.4vw, 1.24rem);
  }
}