:root {
  color-scheme: light;
  --page: #eeede9;
  --surface: #fff;
  --surface-muted: #f7f6f2;
  --ink: #262522;
  --muted: #77766f;
  --line: #deddd7;
  --green: #769656;
  --green-dark: #58783a;
  --green-light: #e4ecd9;
  --board-light: #eeeed2;
  --board-dark: #769656;
  --danger: #bd5146;
  --radius: 5px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page);
}

body {
  margin: 0;
  color: var(--ink);
  font: 14px/1.45 Arial, Helvetica, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: .4;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid #4c8acb;
  outline-offset: 2px;
}

a {
  color: inherit;
  text-decoration: none;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.topbar {
  height: 60px;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  display: flex;
  align-items: center;
  gap: 38px;
  background: #262522;
  color: #f7f6f2;
  border-bottom: 3px solid var(--green);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -.8px;
}

.brand-piece {
  color: #a3c47d;
  font-size: 31px;
  line-height: 1;
}

.brand-light {
  color: #a3c47d;
}

.main-nav {
  height: 100%;
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.nav-link {
  padding: 0 15px;
  border: 0;
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
  background: transparent;
  color: #bcbab2;
  font-size: 13px;
  font-weight: 700;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
}

.nav-link.active {
  border-bottom-color: #a3c47d;
}

.topbar-right {
  margin-left: auto;
}

.free-label {
  padding: 5px 8px;
  border: 1px solid #57564f;
  border-radius: 3px;
  color: #c7c5bd;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

main {
  width: min(1180px, calc(100% - 40px));
  min-height: calc(100vh - 120px);
  margin: 0 auto;
}

.home-view {
  padding: 46px 0 60px;
}

.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 6px;
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 750;
  letter-spacing: -1.6px;
  line-height: 1.1;
}

.heading-description {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.button {
  min-height: 38px;
  padding: 0 14px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  transition: background 120ms ease, border-color 120ms ease;
}

.button-dark {
  background: #302f2b;
  color: #fff;
}

.button-dark:hover {
  background: #44423c;
}

.button-green {
  background: var(--green);
  color: #fff;
}

.button-green:hover {
  background: var(--green-dark);
}

.button-outline {
  background: #fff;
  border-color: #cfcec7;
  color: #33322e;
}

.button-outline:hover {
  background: #f2f1eb;
  border-color: #aaa99f;
}

.button-small {
  min-height: 32px;
  padding: 0 10px;
  font-size: 12px;
}

.import-section,
.games-section {
  margin-bottom: 34px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 13px;
}

.section-heading h2,
.sidebar-heading h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 750;
  letter-spacing: -.35px;
}

.muted {
  color: var(--muted);
  font-size: 12px;
}

.import-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.platform-card {
  min-width: 0;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.platform-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.platform-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 4px;
  font-size: 30px;
}

.chesscom-icon {
  background: #e7f0dd;
  color: #769656;
}

.lichess-icon {
  background: #e9e7df;
  color: #4c4a43;
}

.platform-heading h3 {
  margin: 0 0 3px;
  font-size: 17px;
}

.platform-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.username-form {
  min-height: 42px;
  display: flex;
  align-items: stretch;
  border: 1px solid #cfcec7;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
}

.at-prefix {
  padding: 0 0 0 10px;
  display: flex;
  align-items: center;
  color: #88877f;
  font-size: 11px;
  white-space: nowrap;
}

.username-form input {
  width: 100%;
  min-width: 0;
  padding: 0 8px;
  border: 0;
  outline: none;
  background: #fff;
  color: var(--ink);
  font-size: 13px;
}

.username-form:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 2px #76965626;
}

.username-form .button {
  min-height: 40px;
  flex-shrink: 0;
  border-radius: 0;
}

.platform-note {
  margin: 10px 0 0;
  color: #85847d;
  font-size: 11px;
}

.import-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 24px 0 16px;
  color: #898880;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

.import-divider::before,
.import-divider::after {
  height: 1px;
  flex: 1;
  background: #d7d6cf;
  content: "";
}

.direct-import {
  padding: 17px 19px;
  display: flex;
  align-items: center;
  gap: 9px;
  background: #e5e4dd;
  border: 1px solid #d8d7d0;
  border-radius: var(--radius);
}

.direct-import-copy {
  margin-right: auto;
}

.direct-import-copy h3 {
  margin: 0 0 3px;
  font-size: 14px;
}

.direct-import-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.paste-panel {
  margin-top: 12px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.paste-panel-heading,
.results-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.paste-panel-heading h3,
.results-heading h3 {
  margin: 0 0 3px;
  font-size: 15px;
}

.paste-panel-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.icon-button {
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: #68675f;
  font-size: 23px;
}

.icon-button:hover {
  background: #efeee8;
}

.import-tabs {
  display: flex;
  gap: 4px;
  margin: 15px 0 8px;
  border-bottom: 1px solid var(--line);
}

.tab-button {
  padding: 8px 14px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.tab-button.active {
  border-bottom-color: var(--green);
  color: var(--ink);
}

#import-input {
  width: 100%;
  min-height: 130px;
  padding: 12px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #faf9f6;
  color: var(--ink);
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
  line-height: 1.6;
}

.paste-actions {
  margin-top: 10px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}

.status-message {
  margin-right: auto;
  color: var(--muted);
  font-size: 12px;
}

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

.status-message.success {
  color: var(--green-dark);
}

.game-list {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.empty-state {
  min-height: 144px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 22px;
  color: var(--muted);
  text-align: center;
}

.empty-piece {
  margin-bottom: 6px;
  color: #aaa99f;
  font-size: 30px;
}

.empty-state p {
  margin: 0 0 3px;
  color: var(--ink);
  font-weight: 700;
}

.empty-state span:last-child {
  font-size: 12px;
}

.game-row {
  min-height: 66px;
  padding: 11px 15px;
  display: flex;
  align-items: center;
  gap: 13px;
  border-bottom: 1px solid #ecebe6;
}

.game-row:last-child {
  border-bottom: 0;
}

.game-row:hover {
  background: #f8f8f3;
}

.game-row-main {
  min-width: 0;
  flex: 1;
}

.game-row-title {
  overflow: hidden;
  margin-bottom: 3px;
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.game-row-meta {
  color: var(--muted);
  font-size: 11px;
}

.game-row-result {
  min-width: 38px;
  padding: 5px 7px;
  background: #f0efe9;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 700;
  text-align: center;
}

.game-row .button {
  flex-shrink: 0;
}

.results-heading {
  align-items: center;
  margin-bottom: 8px;
}

.online-results {
  margin-bottom: 14px;
}

.online-results > .status-message {
  margin-bottom: 9px;
}

.text-button {
  padding: 5px 7px;
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: #626159;
  font-size: 12px;
  font-weight: 700;
}

.text-button:hover {
  background: #e8e7e0;
  color: #25241f;
}

.site-footer {
  min-height: 60px;
  padding: 15px max(24px, calc((100vw - 1180px) / 2));
  display: flex;
  justify-content: space-between;
  gap: 14px;
  background: #262522;
  color: #b5b3ab;
  font-size: 11px;
}

.site-footer span:first-child {
  color: #d8d7cf;
  font-weight: 700;
}

.analysis-view {
  padding: 20px 0 50px;
}

.analysis-toolbar {
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.back-link {
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: #65645c;
  font-size: 12px;
  font-weight: 700;
}

.back-link:hover {
  color: var(--green-dark);
}

.analysis-title-group {
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
}

.analysis-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

.analysis-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  align-items: start;
  gap: 18px;
}

.board-column {
  min-width: 0;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.player-strip {
  min-height: 49px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 4px 10px;
}

.bottom-player {
  padding: 10px 4px 2px;
}

.player-piece {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  font-size: 28px;
  line-height: 1;
}

.black-piece {
  color: #302f2b;
}

.white-piece {
  color: #fdfcf6;
  text-shadow: -1px 0 #77766f, 0 1px #77766f, 1px 0 #77766f, 0 -1px #77766f;
}

.player-details {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.player-details strong {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-details span {
  color: var(--muted);
  font-size: 10px;
}

.player-clock {
  margin-left: auto;
  color: #8a8982;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.board-area {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  align-items: stretch;
}

.evaluation-track {
  position: relative;
  min-height: 120px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: #383732;
  border-radius: 2px;
}

.evaluation-black {
  height: 50%;
  background: #383732;
  transition: height 160ms ease;
}

.evaluation-white {
  height: 50%;
  background: #f2f1e9;
  transition: height 160ms ease;
}

.evaluation-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 3px 2px;
  background: #ffffffd9;
  border-radius: 2px;
  color: #272621;
  font-size: 9px;
  font-weight: 800;
  writing-mode: vertical-rl;
  font-variant-numeric: tabular-nums;
}

.board-frame {
  width: 100%;
  max-width: 680px;
  aspect-ratio: 1;
  margin: 0 auto;
  overflow: hidden;
  background: var(--board-light);
}

.chessboard {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  grid-template-rows: repeat(8, minmax(0, 1fr));
  user-select: none;
}

.square {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 0;
  padding: 0;
  aspect-ratio: 1;
  color: #20201d;
  font-size: clamp(25px, 5.2vw, 65px);
  line-height: 1;
  cursor: pointer;
}

.square.light {
  background: var(--board-light);
}

.square.dark {
  background: var(--board-dark);
}

.square.last-move.light {
  background: #f6f39b;
}

.square.last-move.dark {
  background: #baca44;
}

.square.selected {
  background-image: radial-gradient(circle, #f6df50a8 0%, #f6df5080 70%);
  box-shadow: inset 0 0 0 4px #f2d53d;
}

.square.legal-target::after {
  position: absolute;
  width: 27%;
  height: 27%;
  border-radius: 50%;
  background: #292b2580;
  content: "";
  pointer-events: none;
}

.square.legal-capture::after {
  position: absolute;
  inset: 3px;
  border: 5px solid #25251f80;
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.square:focus-visible {
  z-index: 6;
  outline: 3px solid #3678b8;
  outline-offset: -3px;
}

.square .piece {
  position: relative;
  z-index: 1;
  display: block;
  filter: drop-shadow(0 1px 0 #0002);
}

.piece-white {
  color: #fffef6;
  text-shadow: -1px -1px 0 #56564d, 1px -1px 0 #56564d, -1px 1px 0 #56564d, 1px 1px 0 #56564d, 0 2px 1px #0004;
}

.piece-black {
  color: #282822;
  text-shadow: 0 1px 1px #ffffff50;
}

.square-coordinate {
  position: absolute;
  z-index: 2;
  left: 3px;
  bottom: 1px;
  font-size: clamp(8px, 1.15vw, 11px);
  font-weight: 800;
  line-height: 1;
  pointer-events: none;
}

.square.light .square-coordinate {
  color: var(--board-dark);
}

.square.dark .square-coordinate {
  color: var(--board-light);
}

.board-move-classification {
  position: absolute;
  z-index: 5;
  top: 3px;
  right: 3px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 2px solid #ffffffed;
  border-radius: 50%;
  background: #77766f;
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
  pointer-events: none;
  box-shadow: 0 1px 3px #0004;
}

.classification-brilliant {
  background: #16a6e0 !important;
  color: #fff !important;
}

.classification-excellent {
  background: #168bd2 !important;
  color: #fff !important;
}

.classification-best,
.classification-good {
  background: #299b55 !important;
  color: #fff !important;
}

.classification-best {
  font-size: 17px !important;
}

.classification-inaccuracy {
  background: #c59a00 !important;
  color: #fff !important;
}

.classification-mistake {
  background: #e58b27 !important;
  color: #fff !important;
}

.classification-blunder,
.classification-miss {
  background: #d74747 !important;
  color: #fff !important;
}

.classification-book {
  background: #795548 !important;
  color: #fff !important;
}

.move-controls,
.board-extra-controls {
  display: flex;
  align-items: center;
  gap: 5px;
}

.board-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-top: 12px;
}

.control-button {
  width: 39px;
  height: 35px;
  border: 1px solid #dfded8;
  border-radius: 4px;
  background: #f4f3ee;
  color: #33322d;
  font-size: 20px;
  font-weight: 700;
}

.control-button:hover:not(:disabled) {
  background: #e6e5dd;
}

.position-footer {
  margin-top: 11px;
  padding-top: 10px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid #e9e8e2;
  color: var(--muted);
  font-size: 11px;
}

.analysis-sidebar {
  min-width: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar-section {
  padding: 16px;
  border-bottom: 1px solid #e9e8e2;
}

.sidebar-heading {
  min-height: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.sidebar-heading h2 {
  font-size: 15px;
}

.source-chip {
  padding: 3px 6px;
  border-radius: 3px;
  background: #e8e7e0;
  color: #68675f;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .4px;
}

.game-result {
  padding: 10px;
  margin-bottom: 10px;
  background: #f5f4ef;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 700;
}

.game-info-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  color: var(--muted);
  font-size: 12px;
}

.game-info-row strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.move-list {
  max-height: 330px;
  overflow-y: auto;
}

.move-list-empty {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.move-pair {
  min-height: 34px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  border-radius: 3px;
}

.move-pair:nth-child(even) {
  background: #f7f6f2;
}

.move-number {
  padding-left: 6px;
  color: #99988f;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.move-cell {
  min-width: 0;
  height: 29px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 7px;
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: #33322d;
  text-align: left;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.move-cell:hover {
  background: #e8e7df;
}

.move-cell.active {
  background: #d9e7cb;
  color: #26351d;
  font-weight: 800;
}

.move-classification {
  width: 17px;
  height: 17px;
  min-width: 17px;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  line-height: 1;
}

.board-editor-section .sidebar-heading {
  margin-bottom: 7px;
}

.sidebar-help {
  margin-bottom: 12px;
  line-height: 1.5;
}

.full-width {
  width: 100%;
  margin-top: 7px;
}

.engine-notice {
  padding: 15px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: #f6f5f0;
}

.engine-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 4px;
  background: #e3e8dc;
  color: var(--green-dark);
  font-size: 18px;
}

.engine-notice strong {
  display: block;
  margin-bottom: 3px;
  font-size: 12px;
}

.engine-notice p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

@media (min-width: 1050px) {
  .square {
    font-size: clamp(38px, 5.1vw, 68px);
  }
}

@media (max-width: 850px) {
  .analysis-layout {
    grid-template-columns: minmax(0, 1fr) 285px;
    gap: 12px;
  }

  .board-column {
    padding: 10px;
  }

  .analysis-sidebar .sidebar-section {
    padding: 12px;
  }

  .square {
    font-size: clamp(25px, 5vw, 48px);
  }

  .at-prefix {
    padding-left: 7px;
    font-size: 10px;
  }

  .username-form .button {
    padding: 0 9px;
  }
}

@media (max-width: 680px) {
  .topbar {
    height: 55px;
    padding: 0 14px;
    gap: 14px;
  }

  .brand {
    font-size: 18px;
  }

  .brand-piece {
    font-size: 27px;
  }

  .main-nav {
    margin-left: auto;
    gap: 0;
  }

  .nav-link {
    padding: 0 9px;
    font-size: 11px;
  }

  .topbar-right {
    display: none;
  }

  main {
    width: calc(100% - 24px);
  }

  .home-view {
    padding-top: 30px;
  }

  .page-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 25px;
  }

  .page-heading .button {
    width: 100%;
  }

  .import-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .platform-card {
    padding: 15px;
  }

  .platform-heading {
    margin-bottom: 13px;
  }

  .direct-import {
    flex-wrap: wrap;
    padding: 14px;
  }

  .direct-import-copy {
    width: 100%;
    margin-bottom: 4px;
  }

  .direct-import .button {
    flex: 1;
  }

  .analysis-view {
    padding-top: 10px;
  }

  .analysis-toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }

  .analysis-title-group {
    order: 3;
    width: 100%;
    justify-content: center;
    padding: 4px 0;
  }

  .analysis-toolbar > .button {
    margin-left: auto;
  }

  .analysis-layout {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .board-column {
    padding: 10px;
  }

  .board-frame {
    max-width: 100%;
  }

  .square {
    font-size: clamp(28px, 10.5vw, 58px);
  }

  .evaluation-track {
    min-height: 80px;
  }

  .analysis-sidebar {
    width: 100%;
  }

  .move-list {
    max-height: 260px;
  }

  .site-footer {
    padding: 15px 12px;
    flex-direction: column;
    gap: 4px;
  }

  .board-move-classification {
    top: 2px;
    right: 2px;
    width: 22px;
    height: 22px;
    font-size: 12px;
  }
}

@media (max-width: 380px) {
  .brand {
    gap: 5px;
    font-size: 16px;
  }

  .nav-link {
    padding: 0 6px;
    font-size: 10px;
  }

  .username-form {
    flex-wrap: wrap;
    border: 0;
    gap: 6px;
    overflow: visible;
  }

  .at-prefix {
    min-height: 36px;
    padding: 0 8px;
    border: 1px solid var(--line);
    border-radius: 4px;
  }

  .username-form input {
    min-height: 36px;
    flex: 1;
    border: 1px solid var(--line);
    border-radius: 4px;
  }

  .username-form .button {
    width: 100%;
    border-radius: 4px;
  }

  .board-area {
    grid-template-columns: 18px minmax(0, 1fr);
    gap: 5px;
  }

  .square {
    font-size: 10vw;
  }

  .control-button {
    width: 33px;
  }

  .board-move-classification {
    width: 19px;
    height: 19px;
    font-size: 10px;
  }
}

.depth-promo {
  margin-bottom: 34px;
  padding: 17px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  background: #262522;
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
  color: #f7f6f2;
}

.depth-promo-badge {
  flex-shrink: 0;
  padding: 5px 8px;
  border-radius: 3px;
  background: var(--green);
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1px;
}

.depth-promo-copy {
  min-width: 0;
  flex: 1;
}

.depth-promo-copy h2 {
  margin: 0 0 3px;
  font-size: 17px;
  font-weight: 750;
  letter-spacing: -.35px;
}

.depth-promo-copy p {
  margin: 0;
  color: #b5b3ab;
  font-size: 12.5px;
}

.depth-promo .button {
  flex-shrink: 0;
}

.depth-view {
  padding: 20px 0 50px;
}

.depth-view .board-area {
  grid-template-columns: minmax(0, 1fr);
}

.board-frame {
  position: relative;
}

.bp-coach {
  margin-top: 11px;
  padding: 11px 13px;
  min-height: 46px;
  background: #f5f4ef;
  border: 1px solid #e9e8e2;
  border-left: 3px solid var(--green);
  border-radius: 4px;
}

.bp-coach-tag {
  display: inline-block;
  margin-bottom: 4px;
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.bp-coach p {
  margin: 0;
  color: #4a4943;
  font-size: 13px;
  line-height: 1.55;
}

.bp-level-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.bp-level-btn {
  padding: 9px 6px;
  border: 1px solid #d9d8d1;
  border-radius: 5px;
  background: #fff;
  text-align: center;
  transition: border-color .15s, background .15s;
}

.bp-level-btn strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.bp-level-btn span {
  display: block;
  margin-top: 2px;
  font-size: 10px;
  color: var(--muted);
}

.bp-level-btn:hover {
  border-color: var(--green);
}

.bp-level-btn.active {
  border-color: var(--green);
  background: var(--green-light);
}

.bp-color-row {
  margin-top: 14px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.depth-status {
  min-height: 38px;
  margin-top: 11px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.45;
}

.depth-status.neutral {
  background: #f5f4ef;
  border-color: #e9e8e2;
  color: #55544d;
}

.depth-status.ok {
  background: #eef4e6;
  border-color: #d3e3c3;
  color: #4a6b31;
}

.depth-status.danger {
  background: #fbeceb;
  border-color: #f0cdca;
  color: #a53a30;
}

.depth-status.thinking {
  background: #f5f4ef;
  border-color: #e9e8e2;
  color: #77766f;
  animation: dc-pulse 1.1s ease-in-out infinite;
}

.depth-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(24, 23, 21, .88);
}

.depth-overlay.light {
  background: rgba(24, 23, 21, .58);
}

.depth-card {
  width: min(430px, 100%);
  padding: 24px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 12px 40px #0006;
  text-align: center;
}

.depth-card h2 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -.6px;
}

.depth-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.depth-card p strong {
  color: var(--ink);
}

.depth-card .depth-eyebrow {
  margin: 0 0 7px;
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

.dc-loading {
  animation: dc-pulse 1.1s ease-in-out infinite;
}

.depth-actions {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.depth-segments {
  display: none;
}

.square.in-check {
  background-image: radial-gradient(circle, #e0524aaa 0%, #e0524a55 70%);
}

.board-frame.flash-bad {
  animation: dc-bad-flash .5s ease-in-out 3;
}

@keyframes dc-pulse {
  50% { opacity: .55; }
}

@keyframes dc-bad-flash {
  50% { box-shadow: 0 0 0 5px #bd5146aa; }
}

.promo-picker {
  position: absolute;
  inset: 0;
  z-index: 12;
  display: grid;
  grid-template-columns: repeat(4, 54px);
  place-content: center;
  gap: 7px;
  background: rgba(24, 23, 21, .82);
  border-radius: inherit;
}

.promo-picker button {
  width: 54px;
  height: 54px;
  border: 1px solid #cfcec7;
  border-radius: 6px;
  background: #fff;
  color: #282822;
  font-size: 32px;
  line-height: 1;
}

.promo-picker button:hover {
  background: #eef3e5;
  border-color: var(--green);
}

.promo-picker .promo-cancel {
  grid-column: 1 / -1;
  width: auto;
  height: 30px;
  color: #b5b3ab;
  background: transparent;
  border-color: #57564f;
  font-size: 12px;
  font-weight: 700;
}

@media (max-width: 680px) {
  .depth-promo {
    flex-wrap: wrap;
    gap: 10px;
    padding: 14px;
  }

  .depth-promo-copy {
    flex: auto;
    width: 100%;
  }

  .depth-promo .button {
    width: 100%;
  }

  .depth-card {
    padding: 18px;
  }

  .depth-card h2 {
    font-size: 19px;
  }

  .promo-picker {
    grid-template-columns: repeat(4, 48px);
  }

  .promo-picker button {
    width: 48px;
    height: 48px;
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  #nav-bot,
  #nav-puzzles {
    display: none;
  }
}