:root {
  --bg: #f8f8f4;
  --surface: #ffffff;
  --text: #171717;
  --muted: #64645f;
  --line: #d9d9d2;
  --accent: #126b5c;
  --accent-text: #ffffff;
  --danger: #a63c32;
  --mark-exact: #2f9e44;
  --mark-present: #f2c94c;
  --mark-miss: #2f3437;
  --mark-empty: #e4e4dc;
  --shadow: 0 18px 45px rgba(20, 20, 20, .16);
}

[data-theme="dark"] {
  --bg: #111312;
  --surface: #1c201e;
  --text: #f5f5ef;
  --muted: #b8bbb4;
  --line: #383d39;
  --accent: #62d2b1;
  --accent-text: #0d1714;
  --mark-exact: #52c46f;
  --mark-present: #f2c94c;
  --mark-miss: #111312;
  --mark-empty: #343a36;
}

[data-contrast="high"] {
  --bg: #000000;
  --surface: #000000;
  --text: #ffffff;
  --muted: #ffffff;
  --line: #ffffff;
  --accent: #00ffff;
  --accent-text: #000000;
  --mark-exact: #00ff00;
  --mark-present: #ffff00;
  --mark-miss: #000000;
  --mark-empty: #000000;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button, input {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 96px 1fr 128px;
  align-items: center;
  min-height: 62px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
}

.topbar h1 {
  margin: 0;
  text-align: center;
  font-size: 1.35rem;
  letter-spacing: 0;
}

.top-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.icon-button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-weight: 800;
}

.account-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  max-width: 150px;
  min-width: 44px;
  height: 44px;
  padding: 0 10px;
  border-radius: 999px;
  font-weight: 800;
}

.account-button strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .9rem;
}

.account-button.signed-in {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

.game-shell {
  width: min(720px, 100%);
  margin: 0 auto;
  padding: 18px 14px 44px;
}

.modebar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.mode {
  border-radius: 8px;
  font-weight: 700;
}

.mode.active, .primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.secondary {
  border-radius: 8px;
  font-weight: 700;
}

.status-line {
  min-height: 28px;
  margin: 6px 0 12px;
  text-align: center;
  color: var(--muted);
  font-weight: 700;
}

.finished-banner {
  display: grid;
  gap: 4px;
  width: min(420px, 100%);
  margin: 0 auto 14px;
  padding: 12px 14px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  text-align: center;
}

.finished-banner strong {
  font-size: 1.05rem;
}

.finished-banner span {
  color: var(--muted);
  font-weight: 700;
}

.result-view {
  width: min(520px, 100%);
  margin: 0 auto 18px;
  padding: 18px 14px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-heading {
  text-align: center;
}

.result-kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: .86rem;
  font-weight: 900;
  text-transform: uppercase;
}

.result-heading h2 {
  margin: 0;
  font-size: 1.35rem;
}

.result-heading p:last-child {
  margin: 6px 0 0;
  color: var(--muted);
  font-weight: 800;
}

.result-board {
  display: grid;
  gap: 7px;
  margin: 16px auto 0;
}

.result-row {
  display: grid;
  grid-template-columns: 24px 1fr 108px;
  gap: 8px;
  align-items: center;
}

.result-row b {
  color: var(--muted);
  text-align: right;
  font-size: .86rem;
}

.result-code {
  display: grid;
  grid-template-columns: repeat(4, minmax(34px, 1fr));
  gap: 6px;
}

.result-slot {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  min-width: 34px;
  min-height: 34px;
  border: 2px solid var(--line);
  border-radius: 50%;
  color: #111;
  font-weight: 900;
}

.result-slot span {
  display: grid;
  place-items: center;
  width: 62%;
  height: 62%;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,.22);
  background: rgba(255,255,255,.72);
  font-size: .68rem;
}

.result-feedback {
  display: grid;
  align-items: center;
}

.result-feedback .feedback-strip {
  justify-content: end;
}

.result-secret {
  margin: 14px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
  font-weight: 900;
}

.board-wrap {
  display: grid;
  justify-items: center;
  gap: 12px;
}

.board {
  display: grid;
  gap: 6px;
  width: min(420px, 100%);
}

.row {
  display: grid;
  grid-template-columns: repeat(4, minmax(44px, 1fr)) 82px;
  gap: 6px;
  align-items: center;
  min-height: 54px;
}

.slot, .chip, .challenge-slot {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1;
  min-width: 44px;
  min-height: 44px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: #111111;
  font-weight: 900;
}

.slot.filled {
  animation: pop .16s ease-out;
  border-color: #30302d;
}

.slot span, .chip span, .challenge-slot span {
  display: grid;
  place-items: center;
  width: 58%;
  height: 58%;
  border-radius: 50%;
  background: rgba(255,255,255,.68);
  border: 1px solid rgba(0,0,0,.22);
  font-size: .76rem;
}

.feedback {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  align-items: center;
}

.feedback-strip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 70px;
  min-height: 32px;
  padding: 5px 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 82%, var(--bg));
}

.mark {
  display: inline-block;
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  border: 1px solid rgba(0, 0, 0, .28);
  border-radius: 4px;
  background: var(--mark-empty);
}

.mark.exact {
  background: var(--mark-exact);
}

.mark.present {
  background: var(--mark-present);
}

.mark.miss {
  background: var(--mark-miss);
}

.mark.empty {
  background: var(--mark-empty);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  color: var(--muted);
  font-size: .92rem;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.controls {
  position: sticky;
  bottom: 0;
  margin: 16px -14px 0;
  padding: 12px 14px 14px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.color-picker {
  display: grid;
  grid-template-columns: repeat(6, minmax(44px, 1fr));
  gap: 8px;
}

.chip {
  border-radius: 50%;
  padding: 0;
}

.chip[aria-selected="true"] {
  outline: 4px solid var(--accent);
  outline-offset: 2px;
}

.control-actions {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 10px;
  margin-top: 10px;
}

.control-actions button, .after-game button, .whatsapp-share {
  border-radius: 8px;
  font-weight: 800;
}

.after-game {
  margin: 18px auto;
  text-align: center;
}

.share-help {
  width: min(420px, 100%);
  margin: -4px auto 10px;
  color: var(--muted);
  font-size: .92rem;
}

.share-preview,
.share-modal-preview {
  width: min(420px, 100%);
  margin: 10px auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  white-space: pre-wrap;
  font: 800 .98rem/1.45 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.share-modal-preview {
  margin-top: 14px;
}

.share-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: min(420px, 100%);
  margin: 0 auto;
}

.share-actions-modal {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.share-actions-modal button,
.share-actions-modal a {
  border-radius: 8px;
  font-weight: 800;
}

.whatsapp-share {
  display: grid;
  place-items: center;
  min-height: 44px;
  border: 1px solid #128c45;
  background: #25d366;
  color: #101510;
  text-decoration: none;
}

.share-link-button {
  display: grid;
  place-items: center;
  min-height: 44px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--line);
  background: var(--surface);
}

.telegram-share {
  border-color: #229ed9;
  background: #2aabee;
  color: #071015;
}

#shareInviteButton,
#shareChallengeButton {
  border-style: dashed;
}

.ad-slot {
  width: min(520px, 100%);
  height: 72px;
  margin: 22px auto;
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.faq {
  margin-top: 28px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.faq h2 {
  font-size: 1.15rem;
}

details {
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(0, 0, 0, .58);
}

.modal-card {
  position: relative;
  width: min(440px, 100%);
  max-height: 88vh;
  overflow: auto;
  padding: 24px;
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 44px;
  border-radius: 50%;
  font-size: 1.6rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.stat {
  padding: 10px 6px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stat strong {
  display: block;
  font-size: 1.4rem;
}

.histogram {
  display: grid;
  gap: 6px;
}

.bar {
  display: grid;
  grid-template-columns: 28px 1fr 32px;
  gap: 8px;
  align-items: center;
}

.bar span:nth-child(2) {
  min-height: 24px;
  border-radius: 4px;
  background: var(--accent);
}

.switch {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 44px;
  font-weight: 700;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.form-message {
  min-height: 24px;
  margin: 0 0 10px;
  color: var(--muted);
  font-weight: 700;
}

.form-message[data-kind="error"] {
  color: var(--danger);
}

.form-message[data-kind="success"] {
  color: var(--accent);
}

.privacy-note {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: .92rem;
}

.privacy-note a {
  color: var(--accent);
  font-weight: 800;
}

.auth-form input {
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.form-actions button {
  border-radius: 8px;
  padding-inline: 14px;
}

.challenge-builder {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.copy-output {
  overflow-wrap: anywhere;
  color: var(--muted);
}

.legal {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 28px 16px;
}

.admin-page pre {
  padding: 12px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.admin-page {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 24px 14px 48px;
}

.admin-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.admin-header h1 {
  margin: 0;
}

.admin-header p:last-child {
  margin: 6px 0 0;
  color: var(--muted);
  font-weight: 700;
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin: 16px 0;
}

.admin-stat,
.admin-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.admin-stat {
  min-height: 86px;
  padding: 12px;
}

.admin-stat span {
  display: block;
  color: var(--muted);
  font-size: .84rem;
  font-weight: 800;
}

.admin-stat strong {
  display: block;
  margin-top: 4px;
  font-size: 1.55rem;
  line-height: 1.1;
}

.admin-two {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  margin-top: 12px;
}

.admin-panel {
  padding: 14px;
}

.admin-panel h2 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.admin-panel h3 {
  margin: 16px 0 8px;
  font-size: .98rem;
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
  font-size: .9rem;
}

.admin-table th,
.admin-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

.admin-table th {
  color: var(--muted);
  font-size: .78rem;
  text-transform: uppercase;
}

.admin-bars {
  display: grid;
  gap: 7px;
}

.admin-bar {
  display: grid;
  grid-template-columns: 28px 1fr 34px;
  align-items: center;
  gap: 8px;
}

.admin-bar i {
  display: block;
  min-width: 4px;
  height: 24px;
  border-radius: 4px;
  background: var(--accent);
}

.admin-bar span,
.admin-bar strong {
  font-weight: 900;
}

.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;
}

.shake { animation: shake .36s ease-in-out; }
.reveal .slot, .reveal .feedback { animation: flip .34s ease-out; }
.win .slot { animation: jump .42s ease-out; }

@keyframes pop { from { transform: scale(.86); } to { transform: scale(1); } }
@keyframes flip { 50% { transform: rotateX(82deg); } }
@keyframes jump { 50% { transform: translateY(-8px); } }
@keyframes shake {
  20% { transform: translateX(-7px); }
  40% { transform: translateX(7px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

@media (max-width: 520px) {
  .topbar {
    grid-template-columns: 52px 1fr 156px;
    padding-inline: 8px;
  }
  .topbar h1 {
    font-size: 1.05rem;
  }
  .row {
    grid-template-columns: repeat(4, minmax(44px, 1fr)) 78px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .account-button {
    max-width: 78px;
    padding-inline: 8px;
  }

  .share-actions,
  .share-actions-modal {
    grid-template-columns: 1fr;
  }

  .admin-header,
  .admin-two {
    display: grid;
    grid-template-columns: 1fr;
  }

  .admin-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .result-row {
    grid-template-columns: 20px 1fr;
  }

  .result-feedback {
    grid-column: 2;
  }
}