.status {
    grid-column: 1 / -1;
    font-size: 0.9rem;
  }
:root {
  color-scheme: light;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --page-bg: radial-gradient(circle at top, #f5f8ff, #c9d4ec 55%, #a7b6d8);
  --app-bg: rgba(255, 255, 255, 0.9);
  --app-shadow: 0 25px 45px rgba(15, 35, 95, 0.15);
  --title-color: #1f2b4a;
  --text-main: #1f2b4a;
  --muted-text: rgba(31, 43, 74, 0.7);
  --hud-bg: linear-gradient(135deg, rgba(58, 100, 255, 0.12), rgba(58, 100, 255, 0.22));
  --hud-text: #1f2b4a;
  --control-btn-bg: linear-gradient(135deg, #4b76ff, #3659d8);
  --control-btn-border: rgba(26, 62, 160, 0.35);
  --control-btn-border-hover: rgba(26, 62, 160, 0.55);
  --preset-btn-bg: var(--control-btn-bg);
  --control-hover-shadow: 0 6px 14px rgba(58, 100, 255, 0.35);
  --control-outline: #1f2b4a;
  --form-label-color: #233360;
  --input-border: rgba(35, 70, 140, 0.3);
  --input-bg: rgba(255, 255, 255, 0.95);
  --board-wrapper-bg: rgba(39, 58, 107, 0.1);
  --board-bg: rgba(18, 28, 60, 0.22);
  --board-border: rgba(18, 28, 60, 0.3);
  --cell-bg: linear-gradient(135deg, #eef2ff, #d7e3ff);
  --cell-text: #1f2b4a;
  --cell-shadow: inset 0 0 0 1px rgba(25, 45, 90, 0.25);
  --cell-revealed-bg: #f9fbff;
  --flagged-bg: linear-gradient(135deg, #fee2e2, #fecaca);
  --wrong-flag-bg: linear-gradient(135deg, #fff9db, #fde68a);
  --wrong-flag-glow: none;
  --mine-bg: linear-gradient(135deg, rgba(254, 226, 226, 0.95), rgba(254, 202, 202, 0.9));
  --mine-triggered-bg: linear-gradient(135deg, #ff3a3a, #d41919);
  --mine-glow: 0 0 12px rgba(255, 58, 58, 0.55);
  --leaderboard-panel-bg: rgba(255, 255, 255, 0.8);
  --leaderboard-border: rgba(25, 45, 90, 0.15);
  --leaderboard-row-bg: rgba(58, 100, 255, 0.08);
  --leaderboard-empty-color: rgba(31, 43, 74, 0.6);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page-bg: radial-gradient(circle at top, #0f172a, #0b1220 55%, #050b16);
  --app-bg: rgba(15, 23, 42, 0.85);
  --app-shadow: 0 25px 45px rgba(2, 6, 23, 0.6);
  --title-color: #e3e9ff;
  --text-main: #d7defb;
  --muted-text: rgba(203, 213, 225, 0.82);
  --hud-bg: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(30, 64, 175, 0.28));
  --hud-text: #e3e9ff;
  --control-btn-bg: linear-gradient(135deg, #1d4ed8, #1e3a8a);
  --control-btn-border: rgba(148, 163, 184, 0.32);
  --control-btn-border-hover: rgba(191, 219, 254, 0.45);
  --preset-btn-bg: var(--control-btn-bg);
  --control-hover-shadow: 0 8px 18px rgba(59, 130, 246, 0.4);
  --control-outline: rgba(191, 219, 254, 0.9);
  --form-label-color: #cbd5f5;
  --input-border: rgba(148, 163, 184, 0.6);
  --input-bg: rgba(30, 41, 59, 0.9);
  --board-wrapper-bg: rgba(148, 163, 184, 0.12);
  --board-bg: rgba(15, 23, 42, 0.48);
  --board-border: rgba(148, 163, 184, 0.4);
  --cell-bg: linear-gradient(135deg, #1a2740, #050b16);
  --cell-text: #e0e7ff;
  --cell-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.25);
  --cell-revealed-bg: rgba(30, 41, 59, 0.82);
  --flagged-bg: linear-gradient(135deg, rgba(97, 19, 19, 0.88), rgba(56, 11, 11, 0.82));
  --wrong-flag-bg: linear-gradient(135deg, rgba(80, 38, 8, 0.85), rgba(153, 76, 10, 0.7));
  --wrong-flag-glow: none;
  --mine-bg: linear-gradient(135deg, rgba(36, 44, 70, 0.92), rgba(16, 20, 35, 0.94));
  --mine-triggered-bg: linear-gradient(135deg, rgba(248, 113, 113, 0.92), rgba(220, 38, 38, 0.88));
  --mine-glow: 0 0 18px rgba(220, 38, 38, 0.45);
  --leaderboard-panel-bg: rgba(15, 23, 42, 0.85);
  --leaderboard-border: rgba(148, 163, 184, 0.25);
  --leaderboard-row-bg: rgba(59, 130, 246, 0.12);
  --leaderboard-empty-color: rgba(203, 213, 225, 0.7);
}

* {
  box-sizing: border-box;
  user-select: none;
  -webkit-user-select: none;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--page-bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

.github-link {
  position: fixed;
  top: clamp(16px, 2vw, 24px);
  right: clamp(16px, 2vw, 24px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #111827;
  text-decoration: none;
  transition: transform 120ms ease, box-shadow 150ms ease;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.18);
  border: 1px solid rgba(15, 23, 42, 0.08);
  z-index: 40;
}

:root[data-theme="dark"] .github-link {
  background: rgba(255, 255, 255, 0.92);
  color: #111827;
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 28px rgba(2, 6, 23, 0.45);
}

.github-link:hover,
.github-link:focus {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.25);
  outline: none;
}

.github-link svg {
  width: 22px;
  height: 22px;
}

.app-shell {
  background: var(--app-bg);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  box-shadow: var(--app-shadow);
  width: min(95vw, 1100px);
  padding: clamp(18px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

@media (max-width: 680px) {
  body {
    align-items: stretch;
  }

  .app-shell {
    width: 100%;
    min-height: 100vh;
    border-radius: 0;
    padding: clamp(16px, 4vw, 24px);
    gap: 16px;
  }
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.title {
  margin: 0;
  font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.6rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--title-color);
}

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

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.custom-form button,
.restart,
.view-leaderboard,
.theme-toggle {
  appearance: none;
  border: none;
  padding: 9px 16px;
  border-radius: 9px;
  background: var(--control-btn-bg);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
  border: 1px solid var(--control-btn-border);
}

.custom-form button:hover,
.restart:hover,
.view-leaderboard:hover,
.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: var(--control-hover-shadow);
  border-color: var(--control-btn-border-hover);
}

.custom-form button:focus,
.restart:focus,
.view-leaderboard:focus,
.theme-toggle:focus {
  outline: none;
}

.preset-select {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--form-label-color);
  font-size: 0.9rem;
}

.preset-select__label {
  font-weight: 600;
  letter-spacing: 0.05em;
}

.preset-select__control {
  position: relative;
  display: inline-flex;
  align-items: center;
}

#preset-select {
  appearance: none;
  border: 1px solid var(--control-btn-border);
  border-radius: 9px;
  background: var(--control-btn-bg);
  color: #fff;
  font-weight: 600;
  padding: 9px 36px 9px 14px;
  cursor: pointer;
  min-width: 150px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

#preset-select:hover {
  border-color: var(--control-btn-border-hover);
}

#preset-select:focus {
  outline: none;
}

.preset-select__chevron {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.85);
}

:root[data-theme="dark"] .preset-select__chevron {
  color: rgba(191, 219, 254, 0.9);
}

.custom-form {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.custom-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--form-label-color);
  gap: 4px;
}

.custom-form input {
  width: 70px;
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-main);
  user-select: text;
  -webkit-user-select: text;
  text-align: center;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  width: 44px;
  height: 38px;
  padding: 0;
  color: #fff;
}

.theme-toggle:hover,
.theme-toggle:focus {
  color: #fff;
}

.hud {
  background: var(--hud-bg);
  border-radius: 14px;
  padding: 14px 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-areas: "counter status timer";
  align-items: center;
  text-align: center;
  font-weight: 600;
  color: var(--hud-text);
  gap: 10px;
}
#mine-counter {
  grid-area: counter;
}

.status {
  grid-area: status;
  min-height: 1.2em;
}

#timer {
  grid-area: timer;
}


.body-layout {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
}

.board-wrapper {
  background: var(--board-wrapper-bg);
  border-radius: 14px;
  padding: clamp(14px, 2.5vw, 18px);
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  overflow: auto;
}


.board {
  --board-radius: 12px;
  display: grid;
  gap: 2px;
  background: var(--board-bg);
  padding: 6px;
  border-radius: var(--board-radius);
  box-shadow: inset 0 0 0 1px var(--board-border);
  border: 1px solid rgba(25, 50, 120, 0.25);
  -webkit-touch-callout: none;
  touch-action: manipulation;
  -webkit-user-select: none;
}

.board.is-blurred {
  -webkit-filter: blur(1.5px);
  filter: blur(1.5px);
}

.board[data-size="medium"] {
  gap: 1.5px;
  padding: 5px;
}

.board[data-size="large"] {
  gap: 1px;
  padding: 4px;
}

:root[data-theme="dark"] .board {
  border-color: rgba(148, 163, 184, 0.28);
  box-shadow: inset 0 0 0 1px rgba(71, 85, 105, 0.4);
}

:root[data-theme="dark"] .board[data-size="medium"],
:root[data-theme="dark"] .board[data-size="large"] {
  border-color: rgba(148, 163, 184, 0.35);
}

.board-area {
  --board-radius: 12px;
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: auto;
  flex: 0 0 auto;
  min-width: 0;
  min-height: 0;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  -webkit-user-select: none;
}

.board-cover {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.28);
  border-radius: var(--board-radius, 12px);
  overflow: hidden;
  z-index: 30;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  -webkit-user-select: none;
}

:root[data-theme="dark"] .board-cover {
  background: rgba(255, 255, 255, 0.1);
}

.board-cover__action {
  background: rgba(255, 255, 255, 0.28);
  border: 1px solid rgba(31, 43, 74, 0.28);
  color: #1f2b4a;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 11px 30px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 12px 32px rgba(31, 43, 74, 0.18);
  transition: transform 120ms ease, box-shadow 120ms ease, background 160ms ease;
}

.board-cover__action:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(31, 43, 74, 0.24);
  background: rgba(255, 255, 255, 0.4);
}

.board-cover__action:focus,
.board-cover__action:focus-visible {
  outline: none;
}

:root[data-theme="dark"] .board-cover__action {
  background: rgba(30, 41, 59, 0.34);
  border-color: rgba(191, 219, 254, 0.32);
  color: #fff;
  box-shadow: 0 12px 32px rgba(2, 6, 23, 0.45);
}

:root[data-theme="dark"] .board-cover__action:hover {
  box-shadow: 0 16px 36px rgba(2, 6, 23, 0.5);
  background: rgba(30, 41, 59, 0.45);
}

:root[data-theme="dark"] .board-cover__action:focus,
:root[data-theme="dark"] .board-cover__action:focus-visible {
  outline: none;
}

.board-cover__action {
  min-width: 160px;
}

.board-answer-overlay {
  position: absolute;
  box-sizing: border-box;
  pointer-events: none;
  display: grid;
  gap: 2px;
  padding: 6px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  transition: opacity 120ms ease;
  opacity: 0.95;
  z-index: 10;
}

:root[data-theme="dark"] .board-answer-overlay {
  background: rgba(2, 6, 23, 0.5);
}

.answer-cell {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.62rem, 0.4rem + 0.6vw, 0.85rem);
  font-weight: 600;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.82);
  color: #123042;
  font-family: "Fira Code", "Cascadia Code", monospace;
  box-shadow: inset 0 0 0 1px rgba(30, 64, 175, 0.15);
}

:root[data-theme="dark"] .answer-cell {
  background: rgba(59, 130, 246, 0.2);
  color: #e2e8f0;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.4);
}

.answer-cell.mine {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.92), rgba(239, 68, 68, 0.82));
  color: #fff;
}

.answer-cell.zero {
  opacity: 0.5;
}

.answer-cell.triggered {
  box-shadow: 0 0 10px rgba(249, 115, 22, 0.8);
  border: 2px solid rgba(249, 115, 22, 0.85);
}

.answer-cell.safe {
  color: #036672;
}

.cell {
  width: clamp(24px, 2.6vw, 38px);
  height: clamp(24px, 2.6vw, 38px);
  background: var(--cell-bg);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--cell-text);
  cursor: pointer;
  transition: transform 80ms ease, background 150ms ease;
  box-shadow: var(--cell-shadow);
  border: 1px solid rgba(25, 50, 120, 0.2);
  -webkit-touch-callout: none;
  touch-action: manipulation;
  -webkit-user-select: none;
}

.board[data-size="medium"] .cell {
  width: clamp(22px, 2.2vw, 34px);
  height: clamp(22px, 2.2vw, 34px);
}

.board[data-size="large"] .cell {
  width: clamp(18px, 1.9vw, 26px);
  height: clamp(18px, 1.9vw, 26px);
  font-size: clamp(0.7rem, 0.55rem + 0.4vw, 0.85rem);
}

:root[data-theme="dark"] .board .cell {
  border-color: rgba(148, 163, 184, 0.22);
}

:root[data-theme="dark"] .board[data-size="medium"] .cell,
:root[data-theme="dark"] .board[data-size="large"] .cell {
  border-color: rgba(148, 163, 184, 0.28);
}

:root[data-theme="dark"] .cell {
  background: var(--cell-bg);
  box-shadow: inset 0 0 0 1px rgba(51, 65, 85, 0.55);
}

:root[data-theme="dark"] .cell.revealed {
  background: linear-gradient(135deg, rgba(44, 55, 78, 0.92), rgba(24, 32, 49, 0.9));
  color: #dbeafe;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.35);
}

:root[data-theme="dark"] .cell.flagged {
  background: var(--flagged-bg);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
  box-shadow: inset 0 0 0 1px rgba(127, 29, 29, 0.45);
}

:root[data-theme="dark"] .cell.wrong-flag {
  background: var(--wrong-flag-bg);
  color: #facc15;
  border-color: rgba(250, 204, 21, 0.45);
  box-shadow: inset 0 0 0 1px rgba(81, 45, 7, 0.55);
  font-weight: 800;
}

:root[data-theme="dark"] .cell.flagged.flagged-final {
  background: var(--flagged-bg);
  border-color: rgba(239, 68, 68, 0.45);
  box-shadow: inset 0 0 0 1px rgba(127, 29, 29, 0.45);
  color: #fca5a5;
}

.cell:active {
  transform: scale(0.95);
}

.cell.revealed {
  background: var(--cell-revealed-bg);
  cursor: default;
  box-shadow: inset 0 0 0 1px var(--board-border);
  border-color: rgba(25, 50, 120, 0.1);
}

.cell.flagged {
  background: var(--flagged-bg);
  color: #b91c1c;
  border-color: rgba(248, 113, 113, 0.55);
  box-shadow: inset 0 0 0 1px rgba(248, 113, 113, 0.4);
}

.cell.flagged.flagged-final {
  background: var(--flagged-bg);
  border-color: rgba(248, 113, 113, 0.6);
  box-shadow: inset 0 0 0 1px rgba(248, 113, 113, 0.45);
  color: #b91c1c;
}

.cell.wrong-flag {
  background: var(--wrong-flag-bg);
  color: #b45309;
  border-color: rgba(234, 179, 8, 0.48);
  box-shadow: inset 0 0 0 1px rgba(234, 179, 8, 0.35);
  font-weight: 800;
}

.cell.mine {
  background: var(--mine-bg);
  color: #fca5a5;
  border-color: rgba(220, 38, 38, 0.55);
  box-shadow: inset 0 0 0 1px rgba(220, 38, 38, 0.35);
}

.cell.mine.triggered {
  background: var(--mine-triggered-bg);
  box-shadow: var(--mine-glow);
  color: #fee2e2;
}

:root[data-theme="dark"] .cell.mine {
  background: linear-gradient(135deg, rgba(127, 29, 29, 0.92), rgba(67, 9, 26, 0.9));
  color: #fecaca;
  border-color: rgba(239, 68, 68, 0.55);
  box-shadow: inset 0 0 0 1px rgba(99, 19, 33, 0.6);
}

:root[data-theme="dark"] .cell.mine.triggered {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.94), rgba(220, 38, 38, 0.88));
  color: #fee2e2;
  box-shadow: 0 0 24px rgba(239, 68, 68, 0.6);
}

.cell.mine::before {
  content: "💣";
}

.cell.flagged::before {
  content: "🚩";
}

.cell.wrong-flag::before {
  content: none;
}

.cell[data-value="1"] {
  color: #1f4fb5;
}

.cell[data-value="2"] {
  color: #1f7a4d;
}

.cell[data-value="3"] {
  color: #bb3a4a;
}

.cell[data-value="4"] {
  color: #4a2ab3;
}

.cell[data-value="5"] {
  color: #7f2d15;
}

.cell[data-value="6"] {
  color: #157a86;
}

.cell[data-value="7"] {
  color: #5e6a75;
}

.cell[data-value="8"] {
  color: #49525c;
}

:root[data-theme="dark"] .cell[data-value="1"] {
  color: #93c5fd;
}

:root[data-theme="dark"] .cell[data-value="2"] {
  color: #86efac;
}

:root[data-theme="dark"] .cell[data-value="3"] {
  color: #fca5a5;
}

:root[data-theme="dark"] .cell[data-value="4"] {
  color: #c4b5fd;
}

:root[data-theme="dark"] .cell[data-value="5"] {
  color: #f97316;
}

:root[data-theme="dark"] .cell[data-value="6"] {
  color: #67e8f9;
}

:root[data-theme="dark"] .cell[data-value="7"] {
  color: #fde68a;
}

:root[data-theme="dark"] .cell[data-value="8"] {
  color: #e5e7eb;
}

.leaderboard-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: clamp(20px, 5vw, 48px);
  z-index: 90;
}

.leaderboard-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 18, 32, 0.48);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

body[data-theme="dark"] .leaderboard-overlay__backdrop {
  background: rgba(2, 6, 23, 0.58);
}

.leaderboard-overlay__dialog {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: min(520px, 92vw);
  max-height: min(640px, 90vh);
  padding: clamp(20px, 4vw, 28px);
  background: var(--leaderboard-panel-bg);
  border: 1px solid var(--leaderboard-border);
  border-radius: 18px;
  box-shadow: 0 25px 45px rgba(15, 23, 42, 0.35);
  overflow: hidden;
}

body[data-theme="dark"] .leaderboard-overlay__dialog {
  box-shadow: 0 35px 60px rgba(2, 6, 23, 0.55);
}

.leaderboard-overlay__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#leaderboard-overlay-title {
  margin: 0;
  font-size: clamp(1.3rem, 1.1rem + 0.5vw, 1.8rem);
}

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

.leaderboard-overlay__subtitle {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted-text);
}

.leaderboard-overlay__form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.leaderboard-overlay__form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted-text);
}

#nickname-input {
  width: clamp(160px, 40vw, 220px);
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-main);
  user-select: text;
  -webkit-user-select: text;
}

.leaderboard-overlay__form button {
  appearance: none;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  background: var(--preset-btn-bg);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.leaderboard-overlay__form button:hover {
  transform: translateY(-1px);
  box-shadow: var(--control-hover-shadow);
}

.leaderboard-nickname-view {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
}

.leaderboard-nickname-label {
  color: var(--muted-text);
}

.leaderboard-nickname-value {
  font-weight: 600;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-nickname-edit-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: #3151d3;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  font-size: 0.85rem;
}

.leaderboard-nickname-edit-btn:hover,
.leaderboard-nickname-edit-btn:focus {
  background: rgba(59, 130, 246, 0.12);
  color: var(--text-main);
}

:root[data-theme="dark"] .leaderboard-nickname-edit-btn {
  color: rgba(191, 219, 254, 0.95);
}

:root[data-theme="dark"] .leaderboard-nickname-edit-btn:hover,
:root[data-theme="dark"] .leaderboard-nickname-edit-btn:focus {
  background: rgba(37, 99, 235, 0.18);
  color: #e0e7ff;
}



#nickname-edit-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.leaderboard-nickname-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted-text);
}

.leaderboard-nickname-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.leaderboard-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  max-height: clamp(220px, 40vh, 340px);
  padding-right: 4px;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 36px 1fr minmax(70px, auto);
  align-items: center;
  gap: 12px;
  background: var(--leaderboard-row-bg);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.95rem;
  border: 1px solid rgba(59, 130, 246, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

:root[data-theme="dark"] .leaderboard-row {
  border-color: rgba(148, 163, 184, 0.18);
  box-shadow: inset 0 1px 0 rgba(2, 6, 23, 0.45);
}

.leaderboard-row.new-entry {
  border-color: rgba(59, 130, 246, 0.8);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

:root[data-theme="dark"] .leaderboard-row.new-entry {
  border-color: rgba(96, 165, 250, 0.9);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.45), inset 0 1px 0 rgba(15, 23, 42, 0.65);
}

.leaderboard-row--rank-1 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(253, 224, 71, 0.22), rgba(234, 179, 8, 0.12));
  border-color: rgba(234, 179, 8, 0.55);
  box-shadow: 0 8px 18px rgba(234, 179, 8, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

:root[data-theme="dark"] .leaderboard-row--rank-1 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(234, 179, 8, 0.28), rgba(202, 138, 4, 0.22));
  border-color: rgba(251, 191, 36, 0.55);
  box-shadow: 0 10px 22px rgba(202, 138, 4, 0.28), inset 0 1px 0 rgba(15, 23, 42, 0.45);
}

.leaderboard-row--rank-2 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(209, 213, 219, 0.22), rgba(156, 163, 175, 0.12));
  border-color: rgba(148, 163, 184, 0.5);
  box-shadow: 0 6px 16px rgba(148, 163, 184, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

:root[data-theme="dark"] .leaderboard-row--rank-2 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(156, 163, 175, 0.26), rgba(107, 114, 128, 0.2));
  border-color: rgba(156, 163, 175, 0.6);
  box-shadow: 0 8px 20px rgba(107, 114, 128, 0.28), inset 0 1px 0 rgba(15, 23, 42, 0.45);
}

.leaderboard-row--rank-3 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(248, 191, 132, 0.22), rgba(245, 158, 11, 0.12));
  border-color: rgba(217, 119, 6, 0.5);
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

:root[data-theme="dark"] .leaderboard-row--rank-3 {
  --leaderboard-row-bg: linear-gradient(135deg, rgba(217, 119, 6, 0.26), rgba(180, 83, 9, 0.22));
  border-color: rgba(251, 146, 60, 0.55);
  box-shadow: 0 8px 20px rgba(180, 83, 9, 0.28), inset 0 1px 0 rgba(15, 23, 42, 0.45);
}

.leaderboard-row--rank-1.new-entry,
.leaderboard-row--rank-2.new-entry,
.leaderboard-row--rank-3.new-entry {
  border-width: 2px;
}

.leaderboard-rank {
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding: 4px 0;
  border-radius: 999px;
  min-width: 34px;
}

.leaderboard-rank--medal-1 {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #2e1f02;
  box-shadow: 0 6px 12px rgba(245, 158, 11, 0.35);
}

:root[data-theme="dark"] .leaderboard-rank--medal-1 {
  color: #1f1302;
  box-shadow: 0 8px 16px rgba(245, 158, 11, 0.45);
}

.leaderboard-rank--medal-2 {
  background: linear-gradient(135deg, #e5e7eb, #cbd5f5);
  color: #1f2937;
  box-shadow: 0 5px 12px rgba(148, 163, 184, 0.3);
}

:root[data-theme="dark"] .leaderboard-rank--medal-2 {
  background: linear-gradient(135deg, #cbd5f5, #94a3b8);
  color: #0f172a;
  box-shadow: 0 6px 14px rgba(148, 163, 184, 0.45);
}

.leaderboard-rank--medal-3 {
  background: linear-gradient(135deg, #fb923c, #f97316);
  color: #2a1404;
  box-shadow: 0 5px 12px rgba(249, 115, 22, 0.32);
}

:root[data-theme="dark"] .leaderboard-rank--medal-3 {
  color: #1f1305;
  box-shadow: 0 6px 14px rgba(249, 115, 22, 0.45);
}

.leaderboard-entry-name {
  font-weight: 600;
  word-break: break-all;
}

.leaderboard-entry {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.leaderboard-entry-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--muted-text);
}

.leaderboard-entry-time {
  font-weight: 600;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.leaderboard-overlay__empty {
  text-align: center;
  margin: 0;
  color: var(--leaderboard-empty-color);
  font-size: 0.9rem;
}

.leaderboard-overlay__close {
  align-self: flex-end;
  appearance: none;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  background: var(--control-btn-bg);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.leaderboard-overlay__close:hover {
  transform: translateY(-1px);
  box-shadow: var(--control-hover-shadow);
}

body.leaderboard-open {
  overflow: hidden;
}

@media (max-width: 960px) {
  .body-layout {
    padding-inline: clamp(12px, 4vw, 20px);
  }
}

@media (max-width: 680px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
  }

  .controls {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .controls-row {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .controls-row + .controls-row {
    margin-top: 10px;
  }

  .preset-select {
    display: none !important;
  }

  .custom-form {
    width: 100%;
  }

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

  .custom-form label {
    font-size: 0.8rem;
  }

  .custom-form input {
    width: 100%;
  }

  .controls-row > * {
    width: 100%;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "counter timer"
      "status status";
    gap: 6px;
    font-size: 0.85rem;
  }
  #mine-counter {
    justify-self: start;
    text-align: left;
  }

  #timer {
    justify-self: end;
    text-align: right;
  }
  .body-layout {
    flex: 1 1 auto;
    width: 100%;
    margin: 0;
    padding: 0;
    align-items: center;
  }

  .board-wrapper {
    padding: 0;
    margin: 0;
    width: 100%;
    max-width: 100vw;
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: visible;
  }

  .board-area {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    flex: 1 1 auto;
    max-width: 100%;
    margin: 0 auto;
  }

  .board-area.board-area--square {
    aspect-ratio: 1;
  }

  .board {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: none;
  }

  .desktop-only {
    display: none !important;
  }

  .theme-toggle {
    grid-column: auto;
    width: 100%;
    justify-content: center;
  }

  .hud output,
  .hud .status {
    padding: 6px 8px;
  }

  .board-answer-overlay {
    inset: 0;
    width: 100%;
    height: 100%;
  }

  .board .cell,
  .board[data-size="medium"] .cell,
  .board[data-size="large"] .cell {
    width: 100%;
    height: 100%;
    aspect-ratio: 1;
    font-size: clamp(0.7rem, 4.2vw, 1.2rem);
  }

  .leaderboard-overlay {
    align-items: flex-end;
    padding: 12px clamp(12px, 6vw, 18px);
  }

  .leaderboard-overlay__dialog {
    width: 100%;
    max-height: calc(100vh - 24px);
    border-radius: 18px 18px 0 0;
    gap: 16px;
  }

  .leaderboard-list {
    max-height: calc(100vh - 280px);
  }

  .leaderboard-overlay__form {
    flex-direction: column;
    align-items: stretch;
  }

  .leaderboard-overlay__message,
  .leaderboard-overlay__subtitle {
    display: none;
  }

  .leaderboard-nickname-view {
    gap: 6px;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .leaderboard-nickname-value {
    max-width: none;
    flex: 1 1 auto;
  }

  .leaderboard-nickname-actions {
    width: 100%;
  }

  .leaderboard-overlay__form label {
    width: 100%;
  }

  #nickname-input {
    width: 100%;
  }

  .leaderboard-overlay__close {
    align-self: stretch;
    text-align: center;
  }
}