:root {
  --bg0: #09111d;
  --bg1: #111d2d;
  --bg2: #18263a;
  --ink: #f3f7fb;
  --muted: #9ba8ba;
  --glass: rgba(20, 32, 52, 0.64);
  --glass-border: rgba(182, 201, 226, 0.22);
  --brand: #65b4ff;
  --ok: #2dbf87;
  --warn: #d8a14a;
  --bad: #de5959;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  font-family: "Sora", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 5% -5%, rgba(104, 176, 255, 0.22), transparent 62%),
    radial-gradient(900px 600px at 110% 0%, rgba(89, 121, 255, 0.18), transparent 55%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 48%, var(--bg2));
  min-height: 100vh;
}

a {
  color: inherit;
}

.app-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.1rem 1rem 2rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.brand h1 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.2;
}

.brand p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.brand-mark {
  width: 2.4rem;
  height: 2.2rem;
  display: block;
  font-size: 0;
  color: transparent;
  background-image: url('https://media.tenor.com/mvI7pXRJ1jAAAAAi/blunder.gif');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  flex: 0 0 auto;
}

.nav-pill {
  display: flex;
  gap: 0.35rem;
  background: rgba(10, 18, 29, 0.45);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 0.25rem;
  backdrop-filter: blur(10px);
}

.nav-pill a {
  text-decoration: none;
  color: #b7c8dd;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.84rem;
}

.nav-pill a.active {
  background: linear-gradient(160deg, rgba(103, 177, 255, 0.4), rgba(50, 114, 202, 0.45));
  color: #f5fbff;
}

.glass-panel {
  margin-bottom: 0.95rem;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 0.95rem;
  background: var(--glass);
  backdrop-filter: blur(13px);
  box-shadow: 0 12px 35px rgba(2, 7, 18, 0.4);
}

.glass-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.row {
  display: flex;
  align-items: end;
  gap: 0.6rem;
}

.row.wrap {
  flex-wrap: wrap;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  color: #bed0e5;
  font-size: 0.82rem;
}

.severity-filter {
  gap: 0.35rem;
}

.severity-options {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.severity-chip {
  display: inline-flex;
  margin: 0;
}

.severity-chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.severity-chip span {
  border: 1px solid rgba(143, 176, 209, 0.42);
  border-radius: 999px;
  padding: 0.24rem 0.62rem;
  background: rgba(15, 29, 47, 0.72);
  color: #dce8f5;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: all 120ms ease;
}

.severity-chip--inaccuracy span {
  color: #f3f7fb;
}

.severity-chip--mistake span {
  color: #ffd58b;
}

.severity-chip--blunder span {
  color: #ff8f8f;
}

.severity-chip input:checked + span {
  border-color: rgba(111, 190, 255, 0.82);
  background: linear-gradient(165deg, rgba(66, 147, 216, 0.92), rgba(41, 106, 177, 0.94));
  color: #ffffff;
  box-shadow: 0 0 0 1px rgba(123, 195, 255, 0.32) inset;
}

.severity-chip--inaccuracy input:checked + span {
  border-color: rgba(242, 247, 252, 0.82);
  background: linear-gradient(165deg, rgba(173, 188, 206, 0.92), rgba(120, 139, 162, 0.94));
  color: #ffffff;
}

.severity-chip--mistake input:checked + span {
  border-color: rgba(248, 198, 99, 0.92);
  background: linear-gradient(165deg, rgba(207, 151, 54, 0.93), rgba(163, 112, 20, 0.94));
  color: #fff8e8;
}

.severity-chip--blunder input:checked + span {
  border-color: rgba(255, 140, 140, 0.95);
  background: linear-gradient(165deg, rgba(194, 69, 69, 0.94), rgba(146, 34, 34, 0.95));
  color: #fff0f0;
}

.severity-chip input:focus-visible + span {
  outline: 2px solid rgba(126, 201, 255, 0.92);
  outline-offset: 1px;
}

.switch-label {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  color: #dbe8f6;
}

.switch {
  position: relative;
  display: inline-flex;
}

.switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch-track {
  width: 2.7rem;
  height: 1.5rem;
  border-radius: 999px;
  border: 1px solid rgba(145, 176, 209, 0.55);
  background: rgba(24, 38, 58, 0.85);
  position: relative;
  transition: background 120ms ease, border-color 120ms ease;
}

.switch-track::after {
  content: '';
  position: absolute;
  top: 0.12rem;
  left: 0.15rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: #d4e5f8;
  transition: transform 120ms ease;
}

.switch input:checked + .switch-track {
  background: rgba(56, 156, 92, 0.95);
  border-color: rgba(121, 216, 154, 0.95);
}

.switch input:checked + .switch-track::after {
  transform: translateX(1.15rem);
}

.switch input:focus-visible + .switch-track {
  outline: 2px solid rgba(126, 201, 255, 0.92);
  outline-offset: 1px;
}

.settings-overlay[hidden] {
  display: none;
}

.settings-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
}

.settings-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 10, 18, 0.58);
}

.settings-panel {
  position: relative;
  width: min(560px, calc(100vw - 1.5rem));
  margin: 4.5rem auto 0;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 0.9rem;
  background: rgba(16, 26, 41, 0.96);
  box-shadow: 0 18px 44px rgba(2, 7, 18, 0.48);
}

.confirm-panel {
  position: relative;
  width: min(440px, calc(100vw - 1.5rem));
  margin: 8.5rem auto 0;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 0.9rem;
  background: rgba(16, 26, 41, 0.97);
  box-shadow: 0 18px 44px rgba(2, 7, 18, 0.48);
}

.confirm-panel h2 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.confirm-panel p {
  margin: 0;
  color: #c5d6e9;
  font-size: 0.9rem;
}

.confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.settings-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.settings-head h2 {
  margin: 0;
  font-size: 1rem;
}

.settings-grid {
  display: grid;
  gap: 0.7rem;
}

input:not([type='range']):not([type='checkbox']) {
  min-width: 96px;
  border: 1px solid rgba(173, 196, 224, 0.34);
  border-radius: 9px;
  background: rgba(11, 22, 37, 0.64);
  color: #f6f9fc;
  padding: 0.44rem 0.56rem;
}

select {
  min-width: 130px;
  border: 1px solid rgba(173, 196, 224, 0.34);
  border-radius: 9px;
  background: rgba(11, 22, 37, 0.64);
  color: #f6f9fc;
  padding: 0.44rem 0.56rem;
}

input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  min-width: 150px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  padding: 0;
  height: 1.25rem;
}

input[type='range']::-webkit-slider-runnable-track {
  height: 0.42rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(65, 138, 210, 0.9), rgba(36, 92, 153, 0.95));
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 0.96rem;
  height: 0.96rem;
  border-radius: 50%;
  background: #f5fbff;
  border: 2px solid #2f73b8;
  margin-top: -0.27rem;
  box-shadow: 0 2px 8px rgba(4, 12, 22, 0.5);
}

input[type='range']::-moz-range-track {
  height: 0.42rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(65, 138, 210, 0.9), rgba(36, 92, 153, 0.95));
}

input[type='range']::-moz-range-thumb {
  width: 0.96rem;
  height: 0.96rem;
  border-radius: 50%;
  background: #f5fbff;
  border: 2px solid #2f73b8;
  box-shadow: 0 2px 8px rgba(4, 12, 22, 0.5);
}

.slider-value {
  font-size: 0.78rem;
  color: #9db1c9;
}

.range-field {
  gap: 0.28rem;
}

.range-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.range-head .slider-value {
  margin-top: 0;
  text-align: right;
  min-width: 2.2rem;
  color: #c4d4e7;
  font-variant-numeric: tabular-nums;
}

button {
  border: 1px solid rgba(131, 185, 245, 0.52);
  border-radius: 10px;
  background: linear-gradient(160deg, rgba(95, 167, 246, 0.92), rgba(45, 114, 195, 0.94));
  color: #fff;
  padding: 0.46rem 0.72rem;
  cursor: pointer;
  font-weight: 700;
}

.icon-btn {
  width: 2.1rem;
  height: 2.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 1.05rem;
  line-height: 1;
}

button:hover {
  filter: brightness(1.06);
}

button:disabled {
  opacity: 0.62;
  cursor: not-allowed;
}

.danger-btn {
  border-color: rgba(255, 157, 157, 0.5);
  background: linear-gradient(160deg, rgba(191, 84, 84, 0.94), rgba(151, 52, 52, 0.96));
}

.status {
  margin: 0.65rem 0 0;
  border: 1px solid rgba(179, 197, 220, 0.35);
  border-radius: 10px;
  background: rgba(10, 17, 28, 0.5);
  color: #b8c5d8;
  padding: 0.55rem 0.65rem;
  font-size: 0.9rem;
}

.status[data-type='busy'] {
  color: #ffd59b;
  border-color: rgba(255, 191, 117, 0.55);
}

.status[data-type='ok'] {
  color: #8cf0c0;
  border-color: rgba(99, 222, 160, 0.58);
}

.status[data-type='error'] {
  color: #ffb1b1;
  border-color: rgba(255, 130, 130, 0.55);
}

#reviewMoveStatus {
  margin: 0;
}

.review-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
  gap: 0.55rem;
  margin: 0.72rem 0 0.9rem;
}

.app-wrap[data-page='review'] .glass-panel:first-of-type {
  border: 0;
  background: transparent;
  box-shadow: none;
  padding-left: 0;
  padding-right: 0;
}

.review-user-row {
  margin-bottom: 0.45rem;
}

.analyze-user-row {
  align-items: end;
  margin-bottom: 0.45rem;
}

.analyze-controls-row {
  align-items: end;
}

.analyze-actions-row {
  margin-top: 0.65rem;
  align-items: center;
}

.metric-card {
  border: 1px solid rgba(173, 197, 228, 0.22);
  border-radius: 10px;
  padding: 0.52rem 0.62rem;
  background: rgba(15, 25, 40, 0.62);
}

.single-status-card .status {
  margin-top: 0;
}

.profiles-grid {
  display: block;
}

.profile-card {
  display: block;
  position: relative;
  width: 100%;
  border-bottom: 1px solid rgba(173, 197, 228, 0.22);
  padding: 0.5rem 2rem 0.5rem 0.1rem;
  background: transparent;
}

.profile-delete-btn {
  position: absolute;
  top: 0.4rem;
  right: 0.1rem;
  width: 1.35rem;
  height: 1.35rem;
  min-width: 1.35rem;
  padding: 0;
  border-radius: 999px;
  font-size: 0.95rem;
  line-height: 1;
}

.profile-name {
  margin: 0 0.4rem 0 0;
  display: inline;
  font-size: 0.92rem;
  font-weight: 700;
}

.profile-stats {
  display: inline;
  white-space: nowrap;
  font-size: 0.84rem;
  color: #c7d6ea;
}

.metric-label {
  display: block;
  color: #9db1c9;
  font-size: 0.76rem;
}

.metric-value {
  display: block;
  margin-top: 0.2rem;
  font-size: 1.16rem;
  font-weight: 800;
}

.queue-card .queue-breakdown {
  margin-top: 0.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  font-size: 0.83rem;
}

.queue-card .queue-breakdown strong {
  font-variant-numeric: tabular-nums;
}

.q-due {
  color: #6ee0ad;
}

.q-wrong {
  color: #ff9494;
}

.q-new {
  color: #7ec8ff;
}

.board-shell {
  width: min(92vw, 620px);
  position: relative;
  overflow: visible;
  border: 0;
  box-shadow: none;
}

.review-board-row {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
}

.review-side-column {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 220px;
}

.review-side-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.review-side-actions button {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.auto-next[hidden] {
  display: none;
}

.auto-next {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  color: #b8cbe2;
}

.auto-next button {
  width: auto;
  padding: 0.3rem 0.5rem;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-icon {
  line-height: 1;
  font-size: 0.95em;
}

.attempt-box {
  border: 1px solid rgba(173, 197, 228, 0.22);
  border-radius: 10px;
  padding: 0.55rem;
  background: rgba(15, 25, 40, 0.62);
}

.attempt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #9db1c9;
  margin-bottom: 0.3rem;
}

.attempt-head strong {
  color: #f3f7fb;
  font-size: 0.95rem;
}

.attempt-head strong.played-severe {
  color: #ff8f8f;
}

.attempt-head strong.played-mistake {
  color: #ffd58b;
}

.attempt-head strong.played-inaccuracy {
  color: #f3f7fb;
}

.attempt-head strong.answer-eval-pos {
  color: #8cf0c0;
}

.attempt-head strong.answer-eval-neg {
  color: #ff9a9a;
}

.attempt-head strong.answer-eval-neutral {
  color: #d7e3f3;
}

.attempt-timer {
  margin: -0.05rem 0 0.45rem;
  font-size: 0.78rem;
  color: #9db1c9;
  font-variant-numeric: tabular-nums;
}

.attempt-list-wrap {
  border-top: 1px solid rgba(150, 171, 197, 0.22);
  margin-top: 0.4rem;
  padding-top: 0.45rem;
}

.attempt-label {
  font-size: 0.78rem;
  color: #9db1c9;
}

.attempt-list {
  list-style: none;
  margin: 0.35rem 0 0;
  padding: 0;
  max-height: 240px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.attempt-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.82rem;
  border: 1px solid rgba(150, 171, 197, 0.2);
  border-radius: 7px;
  padding: 0.28rem 0.35rem;
  background: rgba(7, 14, 24, 0.4);
}

.attempt-move {
  color: #dce8f7;
  font-weight: 600;
}

.attempt-eval {
  color: #9ed7b6;
  font-variant-numeric: tabular-nums;
}

.attempt-eval-neg {
  color: #ff8f8f;
}

.attempt-eval-pos {
  color: #9ed7b6;
}

.attempt-eval-neutral {
  color: #c7d2e0;
}

.board {
  width: 100%;
  aspect-ratio: 1 / 1;
}

#board[data-theme='brown'] cg-board {
  filter: none;
  background-image: conic-gradient(
    from 90deg,
    #f0d9b5 25%,
    #b58863 0 50%,
    #f0d9b5 0 75%,
    #b58863 0
  ) !important;
  background-size: 25% 25% !important;
  background-position: 0 0 !important;
}

#board[data-theme='blue'] cg-board {
  filter: none;
  background-image: conic-gradient(
    from 90deg,
    #e3edf5 25%,
    #7f9db2 0 50%,
    #e3edf5 0 75%,
    #7f9db2 0
  ) !important;
  background-size: 25% 25% !important;
  background-position: 0 0 !important;
}

#board[data-theme='green'] cg-board {
  filter: none;
  background-image: conic-gradient(
    from 90deg,
    #eeeed2 25%,
    #769656 0 50%,
    #eeeed2 0 75%,
    #769656 0
  ) !important;
  background-size: 25% 25% !important;
  background-position: 0 0 !important;
}

#board[data-theme='slate'] cg-board {
  filter: none;
  background-image: conic-gradient(
    from 90deg,
    #d9dde3 25%,
    #6f7a88 0 50%,
    #d9dde3 0 75%,
    #6f7a88 0
  ) !important;
  background-size: 25% 25% !important;
  background-position: 0 0 !important;
}

#board piece {
  background-size: contain !important;
  background-repeat: no-repeat !important;
}

#board[data-piece-set='cburnett'] {
  --wK: url('https://lichess1.org/assets/piece/cburnett/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/cburnett/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/cburnett/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/cburnett/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/cburnett/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/cburnett/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/cburnett/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/cburnett/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/cburnett/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/cburnett/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/cburnett/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/cburnett/bP.svg');
}

#board[data-piece-set='alpha'] {
  --wK: url('https://lichess1.org/assets/piece/alpha/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/alpha/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/alpha/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/alpha/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/alpha/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/alpha/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/alpha/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/alpha/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/alpha/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/alpha/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/alpha/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/alpha/bP.svg');
}

#board[data-piece-set='merida'] {
  --wK: url('https://lichess1.org/assets/piece/merida/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/merida/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/merida/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/merida/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/merida/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/merida/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/merida/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/merida/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/merida/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/merida/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/merida/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/merida/bP.svg');
}

#board[data-piece-set='pirouetti'] {
  --wK: url('https://lichess1.org/assets/piece/pirouetti/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/pirouetti/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/pirouetti/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/pirouetti/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/pirouetti/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/pirouetti/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/pirouetti/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/pirouetti/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/pirouetti/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/pirouetti/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/pirouetti/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/pirouetti/bP.svg');
}

#board[data-piece-set='cardinal'] {
  --wK: url('https://lichess1.org/assets/piece/cardinal/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/cardinal/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/cardinal/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/cardinal/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/cardinal/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/cardinal/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/cardinal/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/cardinal/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/cardinal/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/cardinal/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/cardinal/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/cardinal/bP.svg');
}

#board[data-piece-set='maestro'] {
  --wK: url('https://lichess1.org/assets/piece/maestro/wK.svg');
  --wQ: url('https://lichess1.org/assets/piece/maestro/wQ.svg');
  --wR: url('https://lichess1.org/assets/piece/maestro/wR.svg');
  --wB: url('https://lichess1.org/assets/piece/maestro/wB.svg');
  --wN: url('https://lichess1.org/assets/piece/maestro/wN.svg');
  --wP: url('https://lichess1.org/assets/piece/maestro/wP.svg');
  --bK: url('https://lichess1.org/assets/piece/maestro/bK.svg');
  --bQ: url('https://lichess1.org/assets/piece/maestro/bQ.svg');
  --bR: url('https://lichess1.org/assets/piece/maestro/bR.svg');
  --bB: url('https://lichess1.org/assets/piece/maestro/bB.svg');
  --bN: url('https://lichess1.org/assets/piece/maestro/bN.svg');
  --bP: url('https://lichess1.org/assets/piece/maestro/bP.svg');
}

#board piece.white.king { background-image: var(--wK); }
#board piece.white.queen { background-image: var(--wQ); }
#board piece.white.rook { background-image: var(--wR); }
#board piece.white.bishop { background-image: var(--wB); }
#board piece.white.knight { background-image: var(--wN); }
#board piece.white.pawn { background-image: var(--wP); }
#board piece.black.king { background-image: var(--bK); }
#board piece.black.queen { background-image: var(--bQ); }
#board piece.black.rook { background-image: var(--bR); }
#board piece.black.bishop { background-image: var(--bB); }
#board piece.black.knight { background-image: var(--bN); }
#board piece.black.pawn { background-image: var(--bP); }

.board-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(2.1rem, 9vw, 4.6rem);
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease;
}

.board-overlay.show {
  opacity: 1;
}

.board-overlay.success {
  color: #d9ffe9;
  background: linear-gradient(180deg, rgba(16, 122, 88, 0.12), rgba(13, 122, 87, 0.5));
}

.board-overlay.fail {
  color: #ffe1e1;
  background: linear-gradient(180deg, rgba(169, 52, 52, 0.12), rgba(169, 52, 52, 0.56));
}

.board-overlay.grade-again {
  color: #fff0f0;
  background: linear-gradient(180deg, rgba(169, 52, 52, 0.18), rgba(169, 52, 52, 0.72));
}

.board-overlay.grade-hard {
  color: #fff8e8;
  background: linear-gradient(180deg, rgba(184, 136, 38, 0.2), rgba(184, 136, 38, 0.7));
}

.board-overlay.grade-good {
  color: #f1fff8;
  background: linear-gradient(180deg, rgba(25, 142, 96, 0.18), rgba(25, 142, 96, 0.68));
}

.board-overlay.grade-easy {
  color: #ecf5ff;
  background: linear-gradient(180deg, rgba(45, 114, 195, 0.2), rgba(45, 114, 195, 0.7));
}

.promotion-picker[hidden] {
  display: none;
}

.promotion-picker {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  gap: 0.4rem;
  justify-content: center;
  padding: 0.45rem;
  background: rgba(7, 13, 23, 0.82);
}

.promotion-picker button {
  min-width: 2.2rem;
  padding: 0.38rem 0.44rem;
}

.grade.again { background: linear-gradient(160deg, #de5959, #bf4141); border-color: rgba(255, 143, 143, 0.4); }
.grade.hard { background: linear-gradient(160deg, #c89a4b, #a87a2f); border-color: rgba(255, 209, 133, 0.4); }
.grade.good { background: linear-gradient(160deg, #2ab980, #198e60); border-color: rgba(113, 236, 183, 0.4); }
.grade.easy { background: linear-gradient(160deg, #3cb7c9, #218aa0); border-color: rgba(140, 222, 236, 0.4); }

#answerRow .grade {
  min-width: 108px;
  padding: 0.62rem 0.92rem;
  font-size: 0.98rem;
}

#answerRow {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
  width: min(92vw, 620px);
  max-width: 100%;
}

#openLichessAnalysis {
  border-color: rgba(169, 200, 233, 0.55);
  background: linear-gradient(160deg, rgba(81, 112, 164, 0.95), rgba(62, 86, 126, 0.96));
}

#viewSourceGame {
  border-color: rgba(132, 223, 164, 0.55);
  background: linear-gradient(160deg, rgba(58, 165, 95, 0.95), rgba(36, 132, 74, 0.96));
}

pre {
  border: 1px solid rgba(168, 193, 222, 0.3);
  border-radius: 11px;
  background: rgba(8, 14, 22, 0.58);
  padding: 0.6rem 0.66rem;
  color: #b9c6d7;
  margin: 0.72rem 0 0;
  white-space: pre-wrap;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.hero-card {
  text-decoration: none;
  display: block;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  background: var(--glass);
  padding: 1rem;
  backdrop-filter: blur(10px);
}

.hero-card h2 {
  margin: 0 0 0.45rem;
}

.hero-card p {
  margin: 0;
  color: var(--muted);
}

.chart-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

.chart-row {
  display: grid;
  grid-template-columns: 88px 1fr 52px;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.78rem;
}

.chart-label {
  color: #a9bdd6;
  white-space: nowrap;
}

.chart-track {
  height: 0.62rem;
  border-radius: 999px;
  background: rgba(21, 37, 59, 0.6);
  overflow: hidden;
}

.chart-bar {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(97, 177, 255, 0.85), rgba(47, 128, 214, 0.9));
}

.chart-bar.ok {
  background: linear-gradient(90deg, rgba(79, 204, 150, 0.9), rgba(33, 168, 118, 0.94));
}

.chart-value {
  text-align: right;
  color: #d8e7fa;
  font-variant-numeric: tabular-nums;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.chart-card {
  border: 1px solid rgba(173, 197, 228, 0.22);
  border-radius: 10px;
  padding: 0.6rem;
  background: rgba(15, 25, 40, 0.62);
}

.chart-card h2 {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
}

.chart-canvas-wrap {
  position: relative;
  min-height: 220px;
}

.chart-canvas-wrap canvas {
  width: 100% !important;
  height: 220px !important;
}

.app-wrap[data-page='stats'] .glass-panel {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  padding: 0;
}

@media (max-width: 860px) {
  html,
  body {
    overflow-x: clip;
  }

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

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

  button {
    width: 100%;
  }

  .icon-btn {
    width: 2.1rem;
  }

  .board-shell {
    width: 100%;
  }

  .review-board-row {
    display: contents;
  }

  .review-side-actions {
    width: 100%;
    min-width: 0;
  }

  .review-side-column {
    width: 100%;
    min-width: 0;
  }

  .app-wrap[data-page='review'] .glass-panel:first-of-type {
    display: flex;
    flex-direction: column;
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0.55rem 0 0.75rem;
  }

  .review-user-row {
    flex-direction: row;
    align-items: end;
    gap: 0.5rem;
    margin-bottom: 0.65rem;
  }

  .review-user-row label {
    flex: 1 1 auto;
    min-width: 0;
  }

  .review-user-row #reviewSettingsBtn {
    flex: 0 0 auto;
    width: 2.1rem;
    height: 2.1rem;
    min-width: 2.1rem;
    align-self: end;
    margin-bottom: 0.02rem;
  }

  .review-user-row #userSelectReview {
    width: 100%;
    min-width: 0;
  }

  .analyze-user-row {
    flex-direction: row;
    align-items: end;
    gap: 0.5rem;
  }

  .analyze-user-row label {
    flex: 1 1 auto;
    min-width: 0;
  }

  .analyze-user-row #analyzeSettingsBtn {
    flex: 0 0 auto;
    width: 2.1rem;
    height: 2.1rem;
    min-width: 2.1rem;
    align-self: end;
    margin-bottom: 0.02rem;
  }

  .analyze-user-row #userSelectAnalyze {
    width: 100%;
    min-width: 0;
  }

  .review-metrics { order: 2; margin-top: 0.35rem; }
  .app-wrap[data-page='review'] .review-side-column {
    display: contents;
  }
  .app-wrap[data-page='review'] .review-side-actions {
    display: contents;
  }
  #showAnswer {
    order: 2;
    margin: 0.35rem 0 0.55rem;
    width: auto;
  }
  .board-shell {
    order: 3;
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    overflow-x: clip;
  }
  #answerRow {
    order: 4;
    margin-top: 0.7rem;
    margin-bottom: 0.95rem;
    width: 100%;
    gap: 0.35rem;
  }
  #answerRow .grade {
    min-width: 0;
    padding: 0.48rem 0.35rem;
    font-size: 0.84rem;
    line-height: 1.1;
  }
  .attempt-box { order: 5; margin-top: 0.2rem; margin-left: 0; margin-right: 0; }
  #openLichessAnalysis { order: 6; margin-top: 0.3rem; margin-left: 0; margin-right: 0; width: auto; }
  #viewSourceGame { order: 7; margin-top: 0.25rem; margin-left: 0; margin-right: 0; width: auto; }
  #engineStatus { order: 8; margin-top: 0.35rem; margin-left: 0; margin-right: 0; }
  #autoNextWrap { order: 2; margin-top: -0.15rem; margin-bottom: 0.45rem; margin-left: 0; margin-right: 0; }
  #reviewMoveStatus { order: 10; margin-top: 0.2rem; margin-left: 0; margin-right: 0; }

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