/* Arena builder */

.single-placeholder[data-page="questions"] {
width: 100%;
max-width: none;
}

#arena-builder-page {
    position: relative;
    padding: 30px;
    border-radius: 34px;
    background:
        radial-gradient(circle at top right, rgba(103, 193, 255, 0.16), transparent 28%),
        linear-gradient(180deg, rgba(255,255,255,0.98), rgba(243,248,255,0.96));
    border: 1px solid rgba(15, 23, 42, 0.05);
    box-shadow: 0 22px 42px rgba(15, 23, 42, 0.08);
    overflow: hidden;
}

.arena-hero {
    position: relative;
    display: grid;
    gap: 12px;
    padding: 26px 26px 24px;
    border-radius: 30px;
    background:
        radial-gradient(circle at top right, rgba(103, 193, 255, 0.22), transparent 28%),
        linear-gradient(180deg, rgba(255,255,255,0.96), rgba(238,246,255,0.9));
    border: 1px solid rgba(10, 132, 255, 0.1);
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.06);
}

.arena-hero::after {
    content: "";
    position: absolute;
    right: 28px;
    top: 28px;
    width: 88px;
    height: 88px;
    border-radius: 999px;
    background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.94), rgba(103,193,255,0.3) 54%, transparent 74%);
    opacity: 0.9;
    pointer-events: none;
}

.arena-hero h3 {
    margin: 0;
    font-size: clamp(38px, 6vw, 58px);
    line-height: 0.95;
    letter-spacing: -0.07em;
}

.arena-hero-subtitle {
    margin: 0;
    max-width: 780px;
    color: #475569;
    font-size: 18px;
    line-height: 1.65;
}

.arena-hero-note {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,0.84);
    border: 1px solid rgba(10, 132, 255, 0.08);
    color: #0f3d91;
    font-size: 13px;
    font-weight: 700;
}

.arena-builder-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 4px;
}

.arena-builder-stat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.94);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #334155;
    font-size: 13px;
    font-weight: 700;
}

.arena-builder-grid {
    margin-top: 22px;
    display: grid;
    grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.2fr);
    gap: 20px;
    align-items: start;
}

.arena-builder-panel,
.arena-filter-card {
    padding: 24px;
    border-radius: 28px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(15, 23, 42, 0.05);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
}

.arena-builder-panel h4,
.arena-filter-card h4 {
    margin: 8px 0 0;
    font-size: 26px;
    letter-spacing: -0.05em;
}

.arena-builder-panel p,
.arena-filter-card p {
    margin: 10px 0 0;
    color: #64748b;
    font-size: 14px;
    line-height: 1.65;
}

.arena-pill-grid {
    margin-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.arena-module-grid {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
    gap: 12px;
}

.arena-module-card,
.arena-filter-pill {
    width: auto;
    min-width: 0;
    padding: 14px 16px;
    border-radius: 22px;
    background: rgba(248, 250, 252, 0.94);
    border: 1px solid rgba(15, 23, 42, 0.06);
    color: #334155;
    box-shadow: none;
    transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.arena-module-card {
    width: 100%;
    min-height: 86px;
    padding: 18px 16px;
    border-radius: 24px;
    text-align: left;
}

.arena-module-card:hover,
.arena-filter-pill:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 24px rgba(15, 23, 42, 0.08);
    border-color: rgba(10, 132, 255, 0.14);
}

.arena-module-card.is-selected,
.arena-filter-pill.is-selected {
    background: linear-gradient(180deg, rgba(239,246,255,0.98), rgba(229,239,255,0.94));
    border-color: rgba(10, 132, 255, 0.2);
    color: #0f3d91;
    box-shadow: 0 14px 24px rgba(10, 132, 255, 0.08);
}

.arena-module-card strong,
.arena-filter-pill strong {
    display: block;
    font-size: 15px;
    letter-spacing: -0.02em;
}

.arena-module-card strong {
    font-size: 20px;
    letter-spacing: -0.045em;
}

.arena-module-card span,
.arena-filter-pill span {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: inherit;
    opacity: 0.86;
}

.arena-filter-grid {
    margin-top: 18px;
    display: grid;
    gap: 18px;
}

.arena-filter-group {
    padding: 18px;
    border-radius: 22px;
    background: rgba(248, 250, 252, 0.86);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.arena-filter-group-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.arena-filter-group-head strong {
    font-size: 16px;
    letter-spacing: -0.02em;
    color: #111827;
}

.arena-filter-group-head span {
    color: #64748b;
    font-size: 12px;
    line-height: 1.5;
}

.arena-filter-meta {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.arena-filter-meta .field-stack {
    margin: 0;
}

.arena-filter-note,
.arena-filter-empty {
    margin-top: 14px;
    color: #64748b;
    font-size: 13px;
    line-height: 1.55;
}

.arena-filter-empty {
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255,255,255,0.8);
    border: 1px dashed rgba(15, 23, 42, 0.08);
}

.arena-toggle-row {
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.arena-toggle-copy strong {
    display: block;
    font-size: 16px;
    letter-spacing: -0.02em;
}

.arena-toggle-copy span {
    display: block;
    margin-top: 4px;
    color: #64748b;
    font-size: 13px;
}

.arena-builder-actions {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.arena-start-button {
    width: auto;
}

.arena-builder-match {
    margin-left: auto;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.94);
    border: 1px solid rgba(15, 23, 42, 0.05);
    color: #334155;
    font-size: 13px;
    font-weight: 700;
}

.arena-builder-inline-note {
    margin-top: 12px;
    color: #64748b;
    font-size: 13px;
    line-height: 1.55;
}