.arena-card[data-astro-cid-i4ntbrju]{background:var(--color-surface, #ffffff);border:1px solid var(--color-surface-border, #d5dfe9);border-radius:var(--radius-lg, 8px);overflow:hidden;transition:border-color var(--transition-fast, .12s),box-shadow var(--transition-fast, .12s)}.arena-card[data-astro-cid-i4ntbrju]:hover{border-color:var(--color-border-hover, #8ba0b5);box-shadow:var(--shadow-md, 0 4px 8px rgba(12, 26, 43, .08))}.arena-card[data-astro-cid-i4ntbrju]:focus-within{border-color:var(--color-signal-deep, #0891b2)}.arena-card__link[data-astro-cid-i4ntbrju]{display:block;color:inherit;text-decoration:none}.arena-card__link[data-astro-cid-i4ntbrju]:focus-visible{outline:2px solid var(--color-signal-deep, #0891b2);outline-offset:-2px}.arena-card__figure[data-astro-cid-i4ntbrju]{background:var(--color-surface-subtle, #eef3f8);border-bottom:1px solid var(--color-surface-border, #d5dfe9)}.arena-card__figure[data-astro-cid-i4ntbrju] svg[data-astro-cid-i4ntbrju]{display:block;width:100%;height:auto}.arena-card__body[data-astro-cid-i4ntbrju]{padding:var(--space-5, 1.25rem);display:flex;flex-direction:column;gap:var(--space-2, .5rem)}.arena-card__meta[data-astro-cid-i4ntbrju]{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2, .5rem);font-size:var(--role-label, .75rem);text-transform:uppercase;letter-spacing:.04em}.arena-card__discipline[data-astro-cid-i4ntbrju]{color:var(--color-primary, #0d4a6e);font-weight:600}.arena-card__family[data-astro-cid-i4ntbrju],.arena-card__difficulty[data-astro-cid-i4ntbrju]{padding:2px 8px;border-radius:var(--radius-pill, 999px);background:var(--color-surface-sunken, #e4ebf2);color:var(--color-text-secondary, #3d5266)}.arena-card__difficulty[data-astro-cid-i4ntbrju].is-foundation{background:var(--color-validated-bg, #edfaf1);color:var(--color-validated, #15803d)}.arena-card__difficulty[data-astro-cid-i4ntbrju].is-intermediate{background:var(--color-review-bg, #fdf8ec);color:var(--color-review, #a16207)}.arena-card__difficulty[data-astro-cid-i4ntbrju].is-advanced{background:var(--color-required-bg, #fef5e7);color:var(--color-required, #b45309)}.arena-card__title[data-astro-cid-i4ntbrju]{margin:0;font-size:var(--role-h3, 1.3125rem);line-height:var(--leading-heading, 1.15);color:var(--color-text-primary, #0c1a2b)}.arena-card__summary[data-astro-cid-i4ntbrju]{margin:0;color:var(--color-text-secondary, #3d5266);font-size:var(--role-ui, .9375rem);line-height:var(--leading-body, 1.7)}.arena-card__cta[data-astro-cid-i4ntbrju]{margin-top:auto;padding-top:var(--space-2, .5rem);display:inline-flex;align-items:center;gap:var(--space-1, .25rem);color:var(--color-required, #b45309);font-size:var(--role-ui, .9375rem);font-weight:600}.arena-page[data-astro-cid-x3ontxh5]{background:var(--color-bg, #f4f7fa)}.arena-shell[data-astro-cid-x3ontxh5]{max-width:var(--container-max-width, 1200px);margin:0 auto;padding:0 var(--space-4, 1rem)}.arena-hero[data-astro-cid-x3ontxh5]{position:relative;isolation:isolate;color:var(--color-deep-text, #e6eef5);background:#071a2b;overflow:hidden}.arena-hero__image[data-astro-cid-x3ontxh5]{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 40%;z-index:-2}.arena-hero__scrim[data-astro-cid-x3ontxh5]{position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,#071a2bf2,#071a2bdb 46%,#0d29429e),linear-gradient(180deg,#071a2b59,#071a2beb)}.arena-hero__inner[data-astro-cid-x3ontxh5]{padding:var(--band-y, 5rem) var(--space-4, 1rem)}.arena-eyebrow[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-2, .5rem);font-size:var(--role-label, .75rem);letter-spacing:.14em;text-transform:uppercase;color:var(--color-signal, #06b6d4)}.arena-hero__title[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-4, 1rem);color:var(--color-deep-text, #e6eef5);font-size:var(--role-h2, 2.5rem);line-height:var(--leading-display, 1.02);font-family:var(--font-display, "Space Grotesk", system-ui, sans-serif);text-shadow:0 2px 12px rgba(7,26,43,.6)}.arena-hero__lead[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-6, 1.5rem);max-width:60ch;font-size:var(--role-lead, 1.125rem);line-height:var(--leading-body, 1.7);color:var(--color-deep-text-muted, #93aec4)}.arena-hero__actions[data-astro-cid-x3ontxh5]{display:flex;flex-wrap:wrap;gap:var(--space-3, .75rem);margin-bottom:var(--space-8, 2rem)}.arena-cta[data-astro-cid-x3ontxh5]{display:inline-flex;align-items:center;padding:var(--space-3, .75rem) var(--space-6, 1.5rem);background:var(--color-signal, #06b6d4);color:#052230;font-weight:700;font-size:var(--role-ui, .9375rem);text-decoration:none;border-radius:var(--radius-md, 5px);transition:background var(--transition-fast, .12s)}.arena-cta[data-astro-cid-x3ontxh5]:hover{background:#7ae3f8}.arena-cta[data-astro-cid-x3ontxh5]:focus-visible{outline:3px solid #ffffff;outline-offset:3px}.arena-cta--ghost[data-astro-cid-x3ontxh5]{background:transparent;color:var(--color-deep-text, #e6eef5);border:1px solid rgba(230,238,245,.4)}.arena-cta--ghost[data-astro-cid-x3ontxh5]:hover{background:#e6eef51a}.arena-hero__facts[data-astro-cid-x3ontxh5]{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:var(--space-6, 1.5rem);font-size:var(--role-ui, .9375rem);color:var(--color-deep-text-muted, #93aec4)}.arena-hero__facts[data-astro-cid-x3ontxh5] strong[data-astro-cid-x3ontxh5]{display:block;font-family:var(--font-mono, "JetBrains Mono", monospace);font-size:1.5rem;color:var(--color-deep-text, #e6eef5)}.arena-section[data-astro-cid-x3ontxh5]{padding:var(--band-y, 5rem) 0}.arena-section--muted[data-astro-cid-x3ontxh5]{background:var(--color-surface-subtle, #eef3f8);border-top:1px solid var(--color-surface-border, #d5dfe9);border-bottom:1px solid var(--color-surface-border, #d5dfe9)}.arena-section__title[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-4, 1rem);font-size:var(--role-h3, 1.3125rem);font-family:var(--font-display, "Space Grotesk", system-ui, sans-serif);color:var(--color-text-primary, #0c1a2b)}.arena-section__note[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-6, 1.5rem);max-width:70ch;color:var(--color-text-secondary, #3d5266);line-height:var(--leading-body, 1.7)}.arena-featured[data-astro-cid-x3ontxh5]{background:var(--color-surface, #ffffff);border-bottom:1px solid var(--color-surface-border, #d5dfe9)}.arena-featured__card[data-astro-cid-x3ontxh5]{display:block;text-decoration:none;color:inherit;border:1px solid var(--color-surface-border, #d5dfe9);border-left:4px solid var(--color-signal, #06b6d4);border-radius:var(--radius-lg, 8px);padding:var(--space-6, 1.5rem);max-width:820px;transition:border-color var(--transition-fast, .12s),box-shadow var(--transition-fast, .12s)}.arena-featured__card[data-astro-cid-x3ontxh5]:hover{box-shadow:var(--shadow-md, 0 4px 8px rgba(12, 26, 43, .08))}.arena-featured__card[data-astro-cid-x3ontxh5]:focus-visible{outline:2px solid var(--color-signal-deep, #0891b2);outline-offset:2px}.arena-featured__meta[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-2, .5rem);font-size:var(--role-label, .75rem);text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted, #64788c)}.arena-featured__title[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-2, .5rem);font-size:var(--role-h3, 1.3125rem);color:var(--color-text-primary, #0c1a2b)}.arena-featured__summary[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-3, .75rem);color:var(--color-text-secondary, #3d5266);line-height:var(--leading-body, 1.7)}.arena-featured__cta[data-astro-cid-x3ontxh5]{display:inline-flex;align-items:center;gap:var(--space-1, .25rem);color:var(--color-required, #b45309);font-weight:600;font-size:var(--role-ui, .9375rem)}.arena-filters[data-astro-cid-x3ontxh5]{display:flex;flex-wrap:wrap;align-items:flex-end;gap:var(--space-4, 1rem);margin:0 0 var(--space-4, 1rem);padding:var(--space-4, 1rem);background:var(--color-surface, #ffffff);border:1px solid var(--color-surface-border, #d5dfe9);border-radius:var(--radius-md, 5px)}.arena-filter[data-astro-cid-x3ontxh5]{display:flex;flex-direction:column;gap:var(--space-1, .25rem);min-width:170px}.arena-filter__label[data-astro-cid-x3ontxh5]{font-size:var(--role-label, .75rem);text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted, #64788c)}.arena-filter__control[data-astro-cid-x3ontxh5]{padding:var(--space-2, .5rem);font-family:inherit;font-size:var(--role-ui, .9375rem);color:var(--color-text-primary, #0c1a2b);background:var(--color-surface, #ffffff);border:1px solid var(--color-border, #b9c7d6);border-radius:var(--radius-sm, 3px)}.arena-filter__control[data-astro-cid-x3ontxh5]:focus-visible{outline:2px solid var(--color-signal-deep, #0891b2);outline-offset:1px}.arena-filter__actions[data-astro-cid-x3ontxh5]{display:flex;align-items:center;gap:var(--space-3, .75rem)}.arena-filter__submit[data-astro-cid-x3ontxh5]{padding:var(--space-2, .5rem) var(--space-5, 1.25rem);font-family:inherit;font-size:var(--role-ui, .9375rem);font-weight:600;color:#fff;background:var(--color-primary, #0d4a6e);border:1px solid var(--color-primary, #0d4a6e);border-radius:var(--radius-sm, 3px);cursor:pointer}.arena-filter__submit[data-astro-cid-x3ontxh5]:hover{background:var(--color-primary-hover, #093a58)}.arena-filter__submit[data-astro-cid-x3ontxh5]:focus-visible{outline:2px solid var(--color-signal-deep, #0891b2);outline-offset:2px}.arena-filter__clear[data-astro-cid-x3ontxh5]{font-size:var(--role-ui, .9375rem);color:var(--color-primary, #0d4a6e);text-decoration:underline}.arena-filter__clear[data-astro-cid-x3ontxh5]:focus-visible{outline:2px solid var(--color-signal-deep, #0891b2);outline-offset:2px}.arena-count[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-4, 1rem);font-size:var(--role-ui, .9375rem);color:var(--color-text-muted, #64788c)}.arena-empty[data-astro-cid-x3ontxh5]{padding:var(--space-8, 2rem);text-align:center;background:var(--color-surface, #ffffff);border:1px dashed var(--color-border, #b9c7d6);border-radius:var(--radius-lg, 8px)}.arena-empty__title[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-2, .5rem);font-weight:600;color:var(--color-text-primary, #0c1a2b)}.arena-empty__body[data-astro-cid-x3ontxh5]{margin:0 0 var(--space-3, .75rem);color:var(--color-text-secondary, #3d5266)}.arena-grid[data-astro-cid-x3ontxh5]{display:grid;gap:var(--space-6, 1.5rem);grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.arena-family-list[data-astro-cid-x3ontxh5]{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-3, .75rem);grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.arena-family[data-astro-cid-x3ontxh5]{background:var(--color-surface, #ffffff);border:1px dashed var(--color-border, #b9c7d6);border-radius:var(--radius-md, 5px);padding:var(--space-4, 1rem);display:flex;flex-direction:column;gap:var(--space-1, .25rem)}.arena-family__name[data-astro-cid-x3ontxh5]{font-weight:600;color:var(--color-text-secondary, #3d5266)}.arena-family__desc[data-astro-cid-x3ontxh5]{font-size:var(--role-ui, .9375rem);color:var(--color-text-muted, #64788c);line-height:var(--leading-body, 1.7)}.arena-principles[data-astro-cid-x3ontxh5]{margin:0;padding-left:var(--space-5, 1.25rem);display:grid;gap:var(--space-4, 1rem);max-width:74ch;color:var(--color-text-secondary, #3d5266);line-height:var(--leading-body, 1.7)}.arena-principles[data-astro-cid-x3ontxh5] strong[data-astro-cid-x3ontxh5]{color:var(--color-text-primary, #0c1a2b)}.arena-notice[data-astro-cid-x3ontxh5]{background:var(--color-review-bg, #fdf8ec);border-top:1px solid var(--color-review-border, #f0d999)}.arena-notice[data-astro-cid-x3ontxh5] p[data-astro-cid-x3ontxh5]{margin:0;max-width:74ch;color:var(--color-text-secondary, #3d5266);line-height:var(--leading-body, 1.7);font-size:var(--role-ui, .9375rem)}@media(max-width:640px){.arena-filters[data-astro-cid-x3ontxh5]{flex-direction:column;align-items:stretch}.arena-filter[data-astro-cid-x3ontxh5]{min-width:0}}@media(prefers-reduced-motion:reduce){.arena-cta[data-astro-cid-x3ontxh5],.arena-featured__card[data-astro-cid-x3ontxh5]{transition:none}}