:root {
  --void: #090a11;
  --bg: #12141d;
  --panel: #1b1e2a;
  --panel-2: #232735;
  --hairline: #ffffff1a;
  --text: #e2e4ee;
  --muted: #9aa1b5;
  --faint: #767d93;
  --brass: #c8a24a;
  --brass-bright: #e3c06a;
  --brass-ink: #1a1408;
  --accent: #779954;
  --good: #9ccf67;
  --warn: #d2a019;
  --mistake: #e08a2e;
  --blunder: #ff6b5e;
  --light-sq: #e9edcc;
  --dark-sq: #779954;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* Compatibility aliases used by the existing mockup markup. */
  --tg-theme-bg-color: var(--bg);
  --tg-theme-text-color: var(--text);
  --tg-theme-hint-color: var(--muted);
  --tg-theme-link-color: var(--brass-bright);
  --tg-theme-button-color: var(--brass);
  --tg-theme-button-text-color: var(--brass-ink);
  --tg-theme-secondary-bg-color: var(--panel);
  --danger: var(--blunder);
  --danger-soft: color-mix(in srgb, var(--blunder) 10%, var(--panel));
  --success: var(--good);
  --success-soft: color-mix(in srgb, var(--accent) 17%, var(--panel));
  --warning: var(--warn);
  --warning-soft: color-mix(in srgb, var(--warn) 12%, var(--panel));
  --line: var(--hairline);
  --shadow: 0 12px 32px rgba(0, 0, 0, .2);
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  min-width: 0;
}

html,
body {
  margin: 0;
  min-height: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 var(--font-body);
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.app {
  width: 100%;
  max-width: 100%;
  min-height: 844px;
  padding: 54px 16px 92px;
  position: relative;
  overflow-x: clip;
  background:
    radial-gradient(circle at 90% 3%, rgba(200, 162, 74, .07), transparent 28%),
    var(--bg);
}

.app.no-main {
  padding-bottom: 24px;
}

.topbar {
  height: 44px;
  padding: 0 12px;
  position: absolute;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(9, 10, 17, .88);
  border-bottom: 1px solid var(--hairline);
  backdrop-filter: blur(16px);
  z-index: 5;
}

.back,
.top-action {
  color: var(--brass-bright);
  font-weight: 600;
}

.back {
  font-size: 14px;
}

.top-title {
  position: absolute;
  left: 50%;
  width: min(48%, 190px);
  overflow: hidden;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-action {
  font-size: 13px;
  margin-left: auto;
}

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--brass-bright);
  font-size: 12px;
  font-weight: 600;
}

.pro-link {
  border: 1px solid rgba(200, 162, 74, .28);
  border-radius: 999px;
  padding: 3px 7px;
  background: rgba(200, 162, 74, .08);
}

.main-button {
  position: absolute;
  z-index: 8;
  left: 12px;
  right: 12px;
  bottom: 12px;
  min-height: 52px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  background: linear-gradient(180deg, var(--brass-bright), var(--brass));
  color: var(--brass-ink);
  font-weight: 700;
  letter-spacing: .01em;
  box-shadow: 0 8px 24px rgba(200, 162, 74, .2);
  cursor: pointer;
}

.main-button.secondary {
  background: var(--panel);
  color: var(--brass-bright);
  border: 1px solid var(--hairline);
  box-shadow: none;
}

h1,
h2,
.metric {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -.01em;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.12;
}

h2 {
  margin: 0;
  font-size: 19px;
  line-height: 1.25;
}

p {
  margin: 0;
}

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

.eyebrow {
  color: var(--brass);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .11em;
}

.section-title {
  margin: 22px 2px 10px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
}

.card {
  max-width: 100%;
  background: linear-gradient(145deg, rgba(255, 255, 255, .018), transparent 45%), var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 15px;
  padding: 15px;
  box-shadow: var(--shadow);
  overflow-wrap: anywhere;
}

.stack {
  display: grid;
  gap: 10px;
  max-width: 100%;
}

.row {
  display: flex;
  align-items: center;
  max-width: 100%;
}

.between {
  justify-content: space-between;
}

.gap8 {
  gap: 8px;
}

.gap12 {
  gap: 12px;
}

.grow {
  flex: 1;
  min-width: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  max-width: 100%;
  border: 1px solid rgba(255, 255, 255, .04);
  border-radius: 999px;
  padding: 4px 8px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  font-weight: 600;
  white-space: nowrap;
}

.badge.good {
  color: var(--good);
  background: var(--success-soft);
  border-color: color-mix(in srgb, var(--accent) 32%, transparent);
}

.badge.bad {
  color: var(--blunder);
  background: var(--danger-soft);
  border-color: color-mix(in srgb, var(--blunder) 30%, transparent);
}

.badge.warn {
  color: var(--warn);
  background: var(--warning-soft);
  border-color: color-mix(in srgb, var(--warn) 28%, transparent);
}

.avatar {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border: 1px solid color-mix(in srgb, var(--brass) 40%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--brass) 10%, var(--panel));
  display: grid;
  place-items: center;
  color: var(--brass-bright);
  font-family: var(--font-mono);
  font-weight: 600;
}

.metric {
  color: var(--brass-bright);
  font-family: var(--font-display);
  font-size: 24px;
  font-variant-numeric: tabular-nums;
}

.divider {
  height: 1px;
  background: var(--hairline);
  margin: 12px 0;
}

.progress {
  height: 8px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel-2);
}

.progress > i {
  display: block;
  height: 100%;
  width: var(--value, 50%);
  background: linear-gradient(90deg, var(--brass), var(--brass-bright));
  border-radius: inherit;
  transition: width .35s ease;
}

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  gap: 3px;
  max-width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--hairline);
  border-radius: 11px;
  padding: 3px;
}

.segmented button {
  border: 0;
  color: var(--muted);
  padding: 9px 5px;
  border-radius: 8px;
  background: transparent;
  font-weight: 600;
  cursor: pointer;
  white-space: normal;
}

.segmented button.active {
  background: var(--panel);
  color: var(--brass-bright);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .22), inset 0 0 0 1px rgba(200, 162, 74, .18);
}

.field {
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 13px 14px;
  color: var(--text);
  background: var(--panel-2);
  outline: none;
}

.field:focus {
  border-color: var(--brass);
  box-shadow: 0 0 0 3px rgba(200, 162, 74, .12);
}

.board-wrap {
  display: flex;
  gap: 8px;
  align-items: stretch;
  max-width: 100%;
}

.eval-bar {
  flex: 0 0 14px;
  width: 14px;
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  background: #17181d;
}

.eval-bar .black {
  flex: var(--black, 42);
  background: #17181d;
}

.eval-bar .white {
  flex: var(--white, 58);
  background: #f2f1ed;
}

.chessboard {
  flex: 1 1 auto;
  width: 0;
  max-width: calc(100% - 22px);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  border-radius: 9px;
  overflow: hidden;
  box-shadow: 0 14px 32px rgba(0, 0, 0, .28);
  direction: ltr;
}

.sq {
  display: grid;
  place-items: center;
  position: relative;
  user-select: none;
}

.sq img {
  width: 92%;
  height: 92%;
  object-fit: contain;
  pointer-events: none;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, .35));
}

.sq:nth-child(16n+1),
.sq:nth-child(16n+3),
.sq:nth-child(16n+5),
.sq:nth-child(16n+7),
.sq:nth-child(16n+10),
.sq:nth-child(16n+12),
.sq:nth-child(16n+14),
.sq:nth-child(16n+16) {
  background: var(--light-sq);
}

.sq:nth-child(16n+2),
.sq:nth-child(16n+4),
.sq:nth-child(16n+6),
.sq:nth-child(16n+8),
.sq:nth-child(16n+9),
.sq:nth-child(16n+11),
.sq:nth-child(16n+13),
.sq:nth-child(16n+15) {
  background: var(--dark-sq);
}

.sq.hot {
  box-shadow: inset 0 0 0 4px var(--blunder);
}

.sq.best {
  box-shadow: inset 0 0 0 4px var(--good);
}

.logo {
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--brass) 38%, transparent);
  border-radius: 22px;
  background: color-mix(in srgb, var(--brass) 7%, var(--void));
  background-image: url("icon128.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: 72%;
  color: transparent;
  font-size: 0 !important;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .3);
}

.mini-logo {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--brass) 30%, transparent);
  border-radius: 10px;
  color: var(--brass-bright);
  background: color-mix(in srgb, var(--brass) 9%, var(--panel-2));
  font-size: 18px;
}

.icon-button {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid var(--hairline);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

.toast {
  max-width: 100%;
  padding: 8px;
  color: var(--faint);
  font-size: 12px;
  text-align: center;
  overflow-wrap: anywhere;
}

strong,
.compare td:not(:first-child),
.compare th:not(:first-child) {
  font-variant-numeric: tabular-nums;
}

.compare td:not(:first-child),
.compare th:not(:first-child),
.mono {
  font-family: var(--font-mono);
}

.review-blunder {
  border-color: color-mix(in srgb, var(--blunder) 48%, transparent) !important;
  background: color-mix(in srgb, var(--blunder) 10%, var(--panel)) !important;
}

.review-good,
.review-start {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent) !important;
  background: color-mix(in srgb, var(--accent) 10%, var(--panel));
}

.compare {
  table-layout: fixed;
  max-width: 100%;
}

.compare th:first-child,
.compare td:first-child {
  width: 43%;
}

.compare th,
.compare td {
  overflow-wrap: anywhere;
  word-break: normal;
}

.telegram-app .browser-main-button {
  display: none;
}

@media (max-width: 390px) {
  .app {
    padding-left: 14px;
    padding-right: 14px;
  }

  .card {
    padding: 14px;
  }

  .sq {
    font-size: clamp(22px, 7vw, 27px);
  }

  .compare th,
  .compare td {
    padding-left: 3px !important;
    padding-right: 3px !important;
    font-size: 11px;
  }
}

@media (max-width: 350px) {
  .app {
    padding-left: 10px;
    padding-right: 10px;
  }

  .badge {
    padding-inline: 6px;
  }
}