.scbc-app {
    --scbc-navy: #102a43;
    --scbc-blue: #1769e0;
    --scbc-blue-dark: #0d4fb3;
    --scbc-cyan: #0e9f9a;
    --scbc-green: #138a5b;
    --scbc-orange: #ea6a20;
    --scbc-red: #c93838;
    --scbc-ink: #172b3f;
    --scbc-muted: #64748b;
    --scbc-line: #dbe5ef;
    --scbc-soft: #f4f8fc;
    width: min(100%, 1080px);
    margin: 36px auto;
    display: grid;
    gap: 30px;
    color: var(--scbc-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

.scbc-app *,
.scbc-app *::before,
.scbc-app *::after { box-sizing: border-box; }

.scbc-app .scbc-card {
    position: relative;
    overflow: hidden;
    margin: 0;
    padding: clamp(24px, 4vw, 44px);
    border: 1px solid rgba(148, 163, 184, .28);
    border-radius: 26px;
    background: #fff;
    box-shadow: 0 22px 55px rgba(15, 42, 67, .10);
}

.scbc-app .scbc-card::before {
    position: absolute;
    inset: 0 0 auto;
    height: 6px;
    content: "";
    background: linear-gradient(90deg, var(--scbc-blue), #5a67d8, var(--scbc-cyan));
}

.scbc-app .scbc-game {
    background:
        radial-gradient(circle at 95% 5%, rgba(23, 105, 224, .12), transparent 27%),
        linear-gradient(180deg, #fff 0%, #f8fbff 100%);
}

.scbc-app .scbc-situation-game {
    background:
        radial-gradient(circle at 95% 5%, rgba(124, 58, 237, .12), transparent 27%),
        linear-gradient(180deg, #fff 0%, #fbf9ff 100%);
}

.scbc-app .scbc-situation-game::before {
    background: linear-gradient(90deg, #7c3aed, #d946ef, #0e9f9a);
}

.scbc-app .scbc-situation-game .scbc-eyebrow { color: #7c3aed; }

.scbc-app .scbc-section-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin: 0 0 25px;
}

.scbc-app .scbc-section-heading h2 {
    margin: 4px 0 7px;
    color: var(--scbc-navy);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 850;
    line-height: 1.08;
    letter-spacing: -.035em;
}

.scbc-app .scbc-eyebrow {
    margin: 0;
    color: var(--scbc-blue);
    font-size: .76rem;
    font-weight: 850;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.scbc-app .scbc-intro {
    max-width: 700px;
    margin: 0;
    color: var(--scbc-muted);
    font-size: 1rem;
}

.scbc-app .scbc-count {
    flex: 0 0 auto;
    padding: 8px 14px;
    border: 1px solid #c9dcff;
    border-radius: 999px;
    background: #edf4ff;
    color: #174d9b;
    font-size: .86rem;
    font-weight: 800;
}

.scbc-app .scbc-add-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    margin: 0 0 18px;
    padding: 12px;
    border: 1px solid var(--scbc-line);
    border-radius: 16px;
    background: var(--scbc-soft);
}

.scbc-app .scbc-add-form input,
.scbc-app .scbc-duration-control input {
    width: 100%;
    height: 48px;
    margin: 0;
    padding: 0 15px;
    border: 1px solid #bdcad8;
    border-radius: 11px;
    outline: 0;
    background: #fff;
    color: var(--scbc-ink);
    box-shadow: none;
    font: inherit;
}

.scbc-app .scbc-add-form input:focus,
.scbc-app .scbc-duration-control input:focus {
    border-color: var(--scbc-blue);
    box-shadow: 0 0 0 4px rgba(23, 105, 224, .14);
}

.scbc-app .scbc-name-list {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 10px;
    min-height: 92px;
    margin: 0;
    padding: 18px;
    border: 1px solid var(--scbc-line);
    border-radius: 18px;
    background: linear-gradient(145deg, #f8fbff, #f2f7fb);
}

.scbc-app .scbc-name-chip {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    height: 39px;
    margin: 0;
    padding: 0 7px 0 14px;
    border: 1px solid #c7d8ec;
    border-radius: 999px;
    background: #fff;
    color: #1d3b57;
    box-shadow: 0 3px 9px rgba(15, 42, 67, .05);
    font-size: .93rem;
    font-weight: 750;
}

.scbc-app .scbc-remove-name {
    display: inline-grid;
    place-items: center;
    width: 26px;
    min-width: 26px;
    height: 26px;
    min-height: 26px;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: #e9eff6;
    color: #52677c;
    box-shadow: none;
    font: 700 18px/1 Arial, sans-serif;
    cursor: pointer;
}

.scbc-app .scbc-remove-name:hover,
.scbc-app .scbc-remove-name:focus-visible {
    background: #fee8e7;
    color: var(--scbc-red);
}

.scbc-app .scbc-actions,
.scbc-app .scbc-game-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 11px;
    margin: 20px 0 0;
}

.scbc-app .scbc-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    margin: 0;
    padding: 11px 18px;
    border: 1px solid transparent;
    border-radius: 12px;
    box-shadow: none;
    font: 800 .94rem/1.2 Inter, ui-sans-serif, system-ui, sans-serif;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: transform .14s ease, box-shadow .14s ease, background .14s ease;
}

.scbc-app .scbc-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(15, 42, 67, .15);
}

.scbc-app .scbc-button:focus-visible,
.scbc-app .scbc-link-button:focus-visible,
.scbc-app .scbc-remove-name:focus-visible {
    outline: 3px solid rgba(23, 105, 224, .25);
    outline-offset: 2px;
}

.scbc-app .scbc-button:disabled { opacity: .4; cursor: not-allowed; }
.scbc-app .scbc-button-primary { background: var(--scbc-blue); color: #fff; }
.scbc-app .scbc-button-primary:hover:not(:disabled) { background: var(--scbc-blue-dark); color: #fff; }
.scbc-app .scbc-button-secondary { border-color: #a9c7f2; background: #eaf2ff; color: #174d9b; }
.scbc-app .scbc-button-quiet { border-color: #cdd8e4; background: #fff; color: #435a70; }
.scbc-app .scbc-button-success { background: var(--scbc-green); color: #fff; }
.scbc-app .scbc-button-next { background: var(--scbc-orange); color: #fff; }
.scbc-app .scbc-button-large { flex: 1 1 180px; min-height: 58px; padding: 14px 20px; font-size: 1.05rem; }

.scbc-app .scbc-message {
    min-height: 1.45em;
    margin: 14px 0 0;
    color: var(--scbc-muted);
    font-size: .92rem;
    font-weight: 600;
}

.scbc-app .scbc-pair-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin: 14px 0 0;
}

.scbc-app .scbc-pair-results[hidden] { display: none; }

.scbc-app .scbc-pair-card {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 82px;
    padding: 15px;
    border: 1px solid #bed4fa;
    border-radius: 15px;
    background: linear-gradient(145deg, #f8fbff, #eaf2ff);
    color: #183e6f;
    font-size: 1rem;
    font-weight: 850;
    text-align: center;
}

.scbc-app .scbc-pair-card span { margin: 0 9px; color: var(--scbc-blue); font-size: .7rem; letter-spacing: .12em; }
.scbc-app .scbc-unpaired { border-color: #f4cb78; background: #fff8e8; color: #944b13; }

.scbc-app .scbc-game-heading { align-items: center; }

.scbc-app .scbc-game-settings {
    display: flex;
    flex: 0 0 auto;
    align-items: flex-end;
    gap: 12px;
}

.scbc-app .scbc-duration-label {
    display: grid;
    gap: 6px;
    margin: 0;
    color: #52677c;
    font-size: .76rem;
    font-weight: 850;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.scbc-app .scbc-duration-control {
    display: flex;
    align-items: center;
    min-width: 164px;
    height: 54px;
    padding-right: 13px;
    border: 1px solid #c6d5e5;
    border-radius: 13px;
    background: #fff;
    color: #52677c;
    font-size: .82rem;
    font-weight: 750;
    letter-spacing: 0;
    text-transform: none;
}

.scbc-app .scbc-duration-control input {
    width: 66px;
    height: 52px;
    padding: 0 7px 0 13px;
    border: 0;
    background: transparent;
    color: var(--scbc-navy);
    font-size: 1.25rem;
    font-weight: 850;
    text-align: center;
}

.scbc-app .scbc-duration-control input:focus { box-shadow: none; }
.scbc-app .scbc-duration-control:focus-within { border-color: var(--scbc-blue); box-shadow: 0 0 0 4px rgba(23, 105, 224, .14); }

.scbc-app .scbc-timer {
    display: grid;
    place-items: center;
    min-width: 132px;
    height: 54px;
    padding: 0 17px;
    border: 2px solid #abc7f5;
    border-radius: 13px;
    background: #edf4ff;
    color: #174d9b;
    font-variant-numeric: tabular-nums;
    font-size: clamp(1.7rem, 4vw, 2.15rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: .02em;
}

.scbc-app .scbc-timer.is-warning { border-color: #f0aa36; background: #fff7e8; color: #a94b0d; }
.scbc-app .scbc-timer.is-ended { border-color: #efaaa7; background: #fff0ef; color: #b72d2d; }

.scbc-app .scbc-progress-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 20px;
    margin: 0 0 13px;
    color: var(--scbc-muted);
    font-size: .88rem;
    font-weight: 750;
}

.scbc-app .scbc-prompt-stage {
    display: grid;
    place-items: center;
    min-height: 360px;
    margin: 0;
    padding: 35px 26px;
    border: 2px solid #c8d9ed;
    border-radius: 22px;
    background: #fff;
    box-shadow: inset 0 0 0 7px #f3f7fb;
    text-align: center;
}

.scbc-app .scbc-prompt-stage.is-active {
    border-color: #8eb4ee;
    box-shadow: inset 0 0 0 7px #eaf2ff, 0 16px 35px rgba(23, 105, 224, .09);
}

.scbc-app .scbc-prompt-label {
    margin: 0 0 13px;
    color: #6d85a0;
    font-size: .7rem;
    font-weight: 900;
    letter-spacing: .18em;
}

.scbc-app .scbc-prompt {
    display: grid;
    gap: clamp(12px, 2vw, 20px);
    max-width: 900px;
    margin: 0;
    color: var(--scbc-navy);
    font-size: clamp(3rem, 8.5vw, 6.7rem);
    font-weight: 950;
    line-height: 1.02;
    letter-spacing: -.045em;
    text-wrap: balance;
}

.scbc-app .scbc-prompt-en,
.scbc-app .scbc-prompt-zh {
    display: block;
}

.scbc-app .scbc-prompt-zh {
    color: #315b87;
    font-size: .56em;
    font-weight: 850;
    line-height: 1.15;
    letter-spacing: .01em;
}

.scbc-app .scbc-prompt-stage.is-long-prompt .scbc-prompt {
    font-size: clamp(2.35rem, 6vw, 5rem);
}

.scbc-app .scbc-situation-prompt {
    max-width: 960px;
    font-size: clamp(2rem, 4.8vw, 3.8rem);
    line-height: 1.14;
    letter-spacing: -.025em;
}

.scbc-app .scbc-situation-prompt .scbc-prompt-zh {
    font-size: .58em;
    line-height: 1.3;
}

.scbc-app .scbc-situation-stage.is-active {
    border-color: #bda4f3;
    box-shadow: inset 0 0 0 7px #f3edff, 0 16px 35px rgba(124, 58, 237, .09);
}

.scbc-app .scbc-reset-row { margin: 22px 0 0; text-align: right; }

.scbc-app .scbc-link-button {
    margin: 0;
    padding: 4px 0;
    border: 0;
    border-bottom: 1px solid currentColor;
    border-radius: 0;
    background: transparent;
    color: #6b7f92;
    box-shadow: none;
    font: 700 .84rem/1.4 Inter, ui-sans-serif, system-ui, sans-serif;
    cursor: pointer;
}

.scbc-app .scbc-link-button:hover { color: var(--scbc-red); background: transparent; }
.scbc-app .scbc-noscript { padding: 12px; border-radius: 10px; background: #fff0ef; color: #a42a2a; }

@media (max-width: 760px) {
    .scbc-app { margin: 18px auto; gap: 20px; }
    .scbc-app .scbc-card { border-radius: 19px; }
    .scbc-app .scbc-section-heading,
    .scbc-app .scbc-game-heading { flex-direction: column; align-items: stretch; }
    .scbc-app .scbc-count { align-self: flex-start; }
    .scbc-app .scbc-game-settings { align-items: stretch; }
    .scbc-app .scbc-duration-label { flex: 1; }
    .scbc-app .scbc-duration-control { min-width: 0; }
    .scbc-app .scbc-timer { flex: 1; min-width: 112px; align-self: end; }
    .scbc-app .scbc-prompt-stage { min-height: 280px; padding: 28px 15px; }
    .scbc-app .scbc-prompt { font-size: clamp(2.65rem, 13vw, 4.5rem); }
    .scbc-app .scbc-prompt-stage.is-long-prompt .scbc-prompt { font-size: clamp(2.1rem, 9vw, 3.6rem); }
    .scbc-app .scbc-situation-prompt { font-size: clamp(1.65rem, 7.4vw, 2.8rem); }
}

@media (max-width: 520px) {
    .scbc-app .scbc-add-form { grid-template-columns: 1fr; }
    .scbc-app .scbc-game-settings { flex-direction: column; }
    .scbc-app .scbc-timer { width: 100%; }
    .scbc-app .scbc-button-large { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    .scbc-app .scbc-button { transition: none; }
}