.scdev-checkers {
    --scdev-checkers-board-dark: #bfbfbf;
    --scdev-checkers-board-light: #ffffff;
    --scdev-checkers-board-border: rgba(0, 0, 0, 0.25);
    --scdev-checkers-board-frame: #f5f5f5;
    --scdev-checkers-panel: #ffffff;
    --scdev-checkers-text: #1f2933;
    --scdev-checkers-muted: #6b7280;
    --scdev-checkers-border: #d8dee8;
    --scdev-checkers-accent: #1f7a63;
    --scdev-checkers-red: #c92a35;
    --scdev-checkers-black: #1f2933;
    box-sizing: border-box;
    color: var(--scdev-checkers-text);
    font-family: ui-rounded, "Segoe UI", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    container-type: inline-size;
    container-name: checkers;
    margin: 4px auto 24px;
}

.scdev-checkers *,
.scdev-checkers *::before,
.scdev-checkers *::after {
    box-sizing: border-box;
}

.scdev-checkers__ai-options {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 12px;
}

.scdev-checkers__ai-options label {
    display: grid;
    gap: 4px;
    color: var(--scdev-checkers-text);
}

.scdev-checkers__ai-options select {
    color-scheme: light;
    background: #fff;
    color: var(--scdev-checkers-text);
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 6px;
    padding: 6px 12px;
    font: inherit;
}

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

.scdev-checkers__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.scdev-checkers__header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.scdev-checkers__title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.15;
    margin: 0;
}

.scdev-checkers__status {
    color: var(--scdev-checkers-muted);
    font-size: 14px;
    margin-top: 4px;
}

.scdev-checkers__button {
    appearance: none;
    border: 1px solid var(--scdev-checkers-border);
    background: #fff;
    color: var(--scdev-checkers-text);
    border-radius: 6px;
    padding: 6px 12px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.scdev-checkers__button:hover {
    background: #f7faf9;
}

.scdev-checkers__button--primary {
    background: var(--scdev-checkers-accent);
    color: #fff;
    border-color: var(--scdev-checkers-accent);
}

.scdev-checkers__button--primary:hover {
    background: #17634f;
}

.scdev-checkers__notice {
    margin: 0 0 12px;
    padding: 6px 12px;
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 7px;
    background: #f8fafc;
    color: var(--scdev-checkers-muted);
    font-size: 13px;
}

.scdev-checkers__rematch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0 0 12px;
    padding: 6px 12px;
    border: 1px solid rgba(31, 122, 99, 0.24);
    border-radius: 8px;
    background: #f8fafc;
    color: var(--scdev-checkers-text);
    font-size: 13px;
}

.scdev-checkers__rematch-copy {
    min-width: 0;
}

.scdev-checkers__rematch strong,
.scdev-checkers__rematch span {
    display: block;
}

.scdev-checkers__rematch strong {
    font-size: 13px;
    line-height: 1.2;
}

.scdev-checkers__rematch span {
    color: var(--scdev-checkers-muted);
    font-size: 12px;
    line-height: 1.2;
}

.scdev-checkers__rematch-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.scdev-checkers__hub-shell {
    display: grid;
    gap: 12px;
}

.scdev-checkers__hub-list {
    display: grid;
    gap: 10px;
}

.scdev-checkers__hub-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 8px;
    background: #fff;
}

.scdev-checkers__hub-card-top {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.scdev-checkers__hub-avatar {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    object-fit: cover;
    flex: 0 0 auto;
    background: #eef2f7;
}

.scdev-checkers__hub-avatar--fallback {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--scdev-checkers-accent);
    background: #eef6f3;
}

.scdev-checkers__hub-copy {
    min-width: 0;
}

.scdev-checkers__hub-copy strong,
.scdev-checkers__hub-copy span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.scdev-checkers__hub-copy strong {
    font-size: 14px;
}

.scdev-checkers__hub-copy span {
    color: var(--scdev-checkers-muted);
    font-size: 12px;
}

.scdev-checkers__hub-empty {
    padding: 10px 12px;
    border: 1px dashed var(--scdev-checkers-border);
    border-radius: 8px;
    background: #f8fafc;
    color: var(--scdev-checkers-muted);
    font-size: 13px;
}

.scdev-checkers__board-frame {
    background: linear-gradient(135deg, var(--scdev-checkers-board-frame), #ebebeb);
    border-radius: 10px;
    padding: 6px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.08);
    width: 100%;
    max-width: 760px;
    justify-self: center;
}

.scdev-checkers__board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    border: 3px solid #000000;
    border-radius: 6px;
    overflow: hidden;
    aspect-ratio: 1;
}

.scdev-checkers__square {
    position: relative;
    border: 1px solid var(--scdev-checkers-board-border);
    padding: 0;
    min-width: 0;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.scdev-checkers__square--light {
    background: #ffffff !important;
    cursor: default;
}

.scdev-checkers__square--dark {
    background: var(--scdev-checkers-board-dark) !important;
}

.scdev-checkers__square--selected {
    outline: 4px solid rgba(250, 204, 21, 0.9);
    outline-offset: -4px;
}

.scdev-checkers__square--move::after {
    content: "";
    width: 28%;
    height: 28%;
    border-radius: 999px;
    background: rgba(250, 204, 21, 0.72);
    box-shadow: 0 0 0 8px rgba(250, 204, 21, 0.18);
}

.scdev-checkers__square--jump::after {
    background: rgba(248, 113, 113, 0.84);
    box-shadow: 0 0 0 8px rgba(248, 113, 113, 0.2);
}

.scdev-checkers__piece {
    width: 78%;
    height: 78%;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: inset 0 3px 8px rgba(255,255,255,0.25), inset 0 -5px 10px rgba(0,0,0,0.28), 0 5px 10px rgba(0,0,0,0.25);
}

.scdev-checkers__piece::after {
    content: "";
    width: 58%;
    height: 58%;
    border-radius: 999px;
    border: 2px solid rgba(255,255,255,0.24);
}

.scdev-checkers__piece--red {
    background: radial-gradient(circle at 35% 25%, #ff8b8b, var(--scdev-checkers-red) 55%, #7f1d1d);
}

.scdev-checkers__piece--black {
    background: radial-gradient(circle at 35% 25%, #7a8490, var(--scdev-checkers-black) 58%, #030712);
}

.scdev-checkers__piece-king {
    position: absolute;
    font-size: 20px;
    line-height: 1;
    color: #facc15;
    text-shadow: 0 1px 1px rgba(0,0,0,0.45);
}

.scdev-checkers__panel {
    background: var(--scdev-checkers-panel);
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 8px;
    padding: 6px 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.scdev-checkers__side {
    display: grid;
    gap: 14px;
}

.scdev-checkers__panel-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--scdev-checkers-muted);
    margin-bottom: 10px;
}

.scdev-checkers__turn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    margin-bottom: 14px;
}

.scdev-checkers__dot {
    width: 18px;
    height: 18px;
    border-radius: 999px;
}

.scdev-checkers__dot--red {
    background: var(--scdev-checkers-red);
}

.scdev-checkers__dot--black {
    background: var(--scdev-checkers-black);
}

.scdev-checkers__score {
    display: grid;
    gap: 8px;
    margin-bottom: 14px;
}

.scdev-checkers__score-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--scdev-checkers-muted);
    font-size: 14px;
}

.scdev-checkers__rules {
    color: var(--scdev-checkers-muted);
    font-size: 13px;
    line-height: 1.45;
}

.scdev-checkers__players {
    display: grid;
    gap: 8px;
}

.scdev-checkers__player,
.scdev-checkers__invite {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.scdev-checkers__player img,
.scdev-checkers__invite img {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    object-fit: cover;
    flex: 0 0 auto;
}

.scdev-checkers__player strong,
.scdev-checkers__player span,
.scdev-checkers__invite span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.scdev-checkers__player strong {
    font-size: 13px;
    line-height: 1.2;
}

.scdev-checkers__player span {
    color: var(--scdev-checkers-muted);
    font-size: 12px;
    line-height: 1.2;
}

.scdev-checkers__player--left {
    opacity: 0.58;
}

.scdev-checkers__panel .scdev-checkers__button {
    padding: 6px 12px;
}

.scdev-checkers__invite {
    appearance: none;
    width: 100%;
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 8px;
    background: #fff;
    color: var(--scdev-checkers-text);
    padding: 7px;
    cursor: pointer;
    text-align: left;
    font: inherit;
    font-size: 13px;
}

.scdev-checkers__invite:hover {
    border-color: var(--scdev-checkers-accent);
    background: #f7faf9;
}

.scdev-checkers__chat {
    display: grid;
    gap: 10px;
}

.scdev-checkers__chat-log {
    height: 75px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 8px;
    background: #f8fafc;
    scrollbar-width: thin;
    scrollbar-color: var(--scdev-checkers-accent) transparent;
}

.scdev-checkers__chat-log::-webkit-scrollbar {
    width: 6px;
}

.scdev-checkers__chat-log::-webkit-scrollbar-track {
    background: transparent;
}

.scdev-checkers__chat-log::-webkit-scrollbar-thumb {
    background: var(--scdev-checkers-accent);
    border-radius: 3px;
}

.scdev-checkers__message {
    max-width: 86%;
    padding: 4px 9px;
    border-radius: 10px;
    font-size: 12px;
    line-height: 1.0;
    word-break: break-word;
}

.scdev-checkers__message--red {
    align-self: flex-start;
    color: #c92a35;
}

.scdev-checkers__message--black {
    align-self: flex-end;
    color: #1f2933;
}

.scdev-checkers__message--spectator {
    align-self: center;
    color: #6b7280;
}

.scdev-checkers__emoji-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.scdev-checkers__emoji {
    appearance: none;
    border: 1px solid var(--scdev-checkers-border);
    background: #fff;
    border-radius: 7px;
    width: 32px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 17px;
    line-height: 1;
}

.scdev-checkers__chat-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 7px;
}

.scdev-checkers__chat-input {
    width: 100%;
    min-width: 0;
    border: 1px solid var(--scdev-checkers-border);
    border-radius: 7px;
    background: #fff;
    color: var(--scdev-checkers-text);
    font: inherit;
    font-size: 13px;
    padding: 8px 9px;
}

.scdev-checkers__chat-input--red {
    color: var(--scdev-checkers-red);
}

.scdev-checkers__chat-input--black {
    color: var(--scdev-checkers-black);
}

.scdev-checkers__chat-input--spectator {
    color: var(--scdev-checkers-muted);
}

.scdev-checkers__chat-send {
    padding-left: 10px;
    padding-right: 10px;
}

.scdev-checkers__loading {
    padding: 24px;
    text-align: center;
    color: var(--scdev-checkers-muted);
}

body.night-mode .scdev-checkers,
body.dark-mode .scdev-checkers {
    --scdev-checkers-board-dark: #1a1a1a;
    --scdev-checkers-board-light: #e5e5e5;
    --scdev-checkers-board-border: rgba(255, 255, 255, 0.2);
    --scdev-checkers-board-frame: #1a1a1a;
    --scdev-checkers-panel: #171b22;
    --scdev-checkers-text: #f3f4f6;
    --scdev-checkers-muted: #a3aab7;
    --scdev-checkers-border: #333a46;
}

body.night-mode .scdev-checkers__button,
body.dark-mode .scdev-checkers__button {
    background: #202630;
    color: var(--scdev-checkers-text);
    border-color: #404040;
}

body.night-mode .scdev-checkers .scdev-checkers__ai-options select,
body.dark-mode .scdev-checkers .scdev-checkers__ai-options select,
body.night-mode .scdev-checkers .scdev-checkers__ai-options option,
body.dark-mode .scdev-checkers .scdev-checkers__ai-options option {
    color-scheme: dark;
    background-color: #202630;
    color: var(--scdev-checkers-text);
    border-color: var(--scdev-checkers-border);
}

body.night-mode .scdev-checkers .scdev-checkers__rules,
body.dark-mode .scdev-checkers .scdev-checkers__rules {
    /* Override theme paragraph colors, including their important declarations. */
    color: #a3aab7 !important;
    -webkit-text-fill-color: #a3aab7 !important;
    opacity: 1;
}

body.night-mode .scdev-checkers__button--primary,
body.dark-mode .scdev-checkers__button--primary {
    background: var(--scdev-checkers-accent);
    color: #ffffff;
    border-color: var(--scdev-checkers-accent);
}

body.night-mode .scdev-checkers__board,
body.dark-mode .scdev-checkers__board {
    border-color: #ffffff;
}

body.night-mode .scdev-checkers__notice,
body.dark-mode .scdev-checkers__notice {
    background: #11151d;
}

body.night-mode .scdev-checkers__rematch,
body.dark-mode .scdev-checkers__rematch {
    background: #11151d;
    border-color: rgba(148, 163, 184, 0.25);
    color: #f3f4f6;
}

body.night-mode .scdev-checkers__rematch span,
body.dark-mode .scdev-checkers__rematch span {
    color: #a3aab7;
}

body.night-mode .scdev-checkers__hub-card,
body.dark-mode .scdev-checkers__hub-card {
    background: #171b22;
    border-color: var(--scdev-checkers-border);
}

body.night-mode .scdev-checkers__hub-avatar,
body.dark-mode .scdev-checkers__hub-avatar {
    background: #202630;
}

body.night-mode .scdev-checkers__hub-avatar--fallback,
body.dark-mode .scdev-checkers__hub-avatar--fallback {
    background: #202630;
}

body.night-mode .scdev-checkers__hub-empty,
body.dark-mode .scdev-checkers__hub-empty {
    background: #11151d;
}

body.night-mode .scdev-checkers__chat-log,
body.dark-mode .scdev-checkers__chat-log {
    background: #11151d;
}

body.night-mode .scdev-checkers__emoji,
body.dark-mode .scdev-checkers__emoji,
body.night-mode .scdev-checkers__chat-input,
body.dark-mode .scdev-checkers__chat-input {
    background: #202630;
    color: var(--scdev-checkers-text);
}

body.night-mode .scdev-checkers__invite,
body.dark-mode .scdev-checkers__invite {
    background: #202630;
    color: var(--scdev-checkers-text);
}

@media (max-width: 760px) {
    .scdev-checkers__shell {
        grid-template-columns: 1fr;
    }

    .scdev-checkers__hub-card {
        align-items: flex-start;
        flex-direction: column;
    }

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

    .scdev-checkers__title {
        font-size: 21px;
    }

    .scdev-checkers__chat-form {
        grid-template-columns: 1fr;
    }

    .scdev-checkers__chat-send {
        grid-column: 1 / -1;
    }
}

/* Scoped presentation: adapt to the shortcode container, not the viewport. */
.scdev-checkers .scdev-checkers__header {
    flex-wrap: wrap;
    padding: 6px 0;
    gap: 16px;
    margin-bottom: 20px;
}
.scdev-checkers .scdev-checkers__title {
    font: 400 clamp(28px, 5cqi, 44px)/1.15 "Trebuchet MS", "Avenir Next", "Segoe UI", sans-serif;
    letter-spacing: -0.025em;
    color: var(--scdev-checkers-text) !important;
    margin: 4px 0 8px;
}
.scdev-checkers .scdev-checkers__eyebrow {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.14em;
    color: var(--scdev-checkers-muted);
}
.scdev-checkers .scdev-checkers__hub-shell {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 390px), 1fr));
    gap: 18px;
    align-items: stretch;
}
.scdev-checkers .scdev-checkers__mode-card {
    border-radius: 16px;
    border-top: 4px solid #23876e;
    box-shadow: 0 6px 20px rgb(0 0 0 / 6%);
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}
.scdev-checkers .scdev-checkers__mode-card--friends { border-top-color: #d05849; }
.scdev-checkers .scdev-checkers__mode-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}
.scdev-checkers .scdev-checkers__mode-icon {
    display: grid;
    place-items: center;
    flex: 0 0 48px;
    height: 48px;
    border-radius: 14px;
    background: #e7f5ef;
    color: #17634f;
    font: 32px/1 "Segoe UI Symbol", sans-serif;
}
.scdev-checkers .scdev-checkers__mode-card--friends .scdev-checkers__mode-icon {
    background: #fff0ed;
    color: #a9342d;
}
.scdev-checkers .scdev-checkers__panel-title {
    font: 750 20px/1.3 ui-rounded, "Segoe UI", system-ui, sans-serif;
    text-transform: none;
    letter-spacing: -0.02em;
    color: var(--scdev-checkers-text) !important;
    margin: 0 0 10px;
}
.scdev-checkers .scdev-checkers__mode-heading .scdev-checkers__panel-title { margin: 2px 0 0; font-size: 26px; }
.scdev-checkers .scdev-checkers__intro,
.scdev-checkers .scdev-checkers__rules {
    font: inherit;
    color: var(--scdev-checkers-muted) !important;
    -webkit-text-fill-color: var(--scdev-checkers-muted) !important;
    margin: 0;
    overflow-wrap: anywhere;
}
.scdev-checkers .scdev-checkers__mode-card .scdev-checkers__rules { font-size: 13px; margin: auto 0 6px; }
.scdev-checkers .scdev-checkers__ai-options { gap: 10px; }
.scdev-checkers .scdev-checkers__ai-options label { flex: 1 1 130px; min-width: 0; font: 600 15px/1.5 "Segoe UI", system-ui, sans-serif; }
.scdev-checkers .scdev-checkers__ai-options select {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    min-height: 42px;
    font: 600 16px/1.5 "Segoe UI", system-ui, sans-serif;
    margin: 0;
}
.scdev-checkers .scdev-checkers__button {
    font: 700 16px/1.5 "Segoe UI", system-ui, sans-serif;
    padding: 6px 12px;
    min-height: 42px;
    border-radius: 9px;
    margin: 0;
    white-space: normal;
    text-transform: none;
    letter-spacing: normal;
    box-shadow: none;
    overflow-wrap: anywhere;
}
.scdev-checkers .scdev-checkers__ai-options [data-action="start-ai"] { flex: 1 1 100%; }
.scdev-checkers :is(button, select, input):focus-visible { outline: 3px solid #d49b22; outline-offset: 3px; }
.scdev-checkers .scdev-checkers__hub-empty { font-size: 15px; padding: 6px 12px; }
.scdev-checkers .scdev-checkers__hub-card { padding: 6px 12px; }
.scdev-checkers .scdev-checkers__status { font-size: 15px; }
.scdev-checkers .scdev-checkers__shell > *,
.scdev-checkers .scdev-checkers__side > * { min-width: 0; }
.scdev-checkers .scdev-checkers__square { min-height: 0; margin: 0; border-radius: 0; box-shadow: none; }
.scdev-checkers .scdev-checkers__score-row { flex-wrap: wrap; }
.scdev-checkers .scdev-checkers__rematch { flex-wrap: wrap; }
.scdev-checkers .scdev-checkers__chat-input { padding: 6px 9px; }
@container checkers (min-width: 720px) {
    .scdev-checkers .scdev-checkers__shell { grid-template-columns: minmax(0, 1fr) minmax(240px, 300px); }
}
@container checkers (max-width: 440px) {
    .scdev-checkers .scdev-checkers__header-actions { width: 100%; justify-content: stretch; }
    .scdev-checkers .scdev-checkers__header-actions .scdev-checkers__button { flex: 1; }
    .scdev-checkers .scdev-checkers__mode-heading .scdev-checkers__panel-title { font-size: 23px; }
    .scdev-checkers .scdev-checkers__chat-form { grid-template-columns: minmax(0, 1fr); }
    .scdev-checkers .scdev-checkers__hub-card { flex-wrap: wrap; }
}

/* Keep the board and sidebar together, centered inside the theme content. */
.scdev-checkers[data-mode="ai"],
.scdev-checkers[data-mode="room"] {
    --scdev-checkers-fit: max(160px, calc(100dvh - 220px));
}
.scdev-checkers[data-mode="ai"] .scdev-checkers__header,
.scdev-checkers[data-mode="room"] .scdev-checkers__header,
.scdev-checkers .scdev-checkers__shell {
    width: 100%;
    max-width: calc(min(760px, var(--scdev-checkers-fit, 760px)) + 318px);
    margin-left: auto;
    margin-right: auto;
}
.scdev-checkers .scdev-checkers__board-frame {
    width: 100%;
    max-width: min(760px, var(--scdev-checkers-fit, 760px));
}
@container checkers (min-width: 720px) {
    .scdev-checkers .scdev-checkers__shell {
        grid-template-columns: minmax(0, 1fr) 300px;
        justify-content: center;
    }
}