.number-bonds-page { --number-bonds-line: color-mix(in oklab, var(--color-base-content) 14%, transparent); --number-bonds-ink: var(--color-base-content); }
.number-bonds-page.is-playing .number-bonds__content { max-width: 100rem; padding-top: clamp(1rem, 2vw, 2rem); padding-bottom: clamp(2rem, 4vw, 4rem); }
.number-bonds-page.is-playing .number-bonds__hero { display: none; }
.number-bonds__hero-card { min-height: 22rem; overflow: hidden; border-radius: var(--radius-box); padding: clamp(1.5rem, 3vw, 2rem); background: linear-gradient(145deg, var(--color-neutral), color-mix(in oklab, var(--color-neutral) 68%, var(--color-secondary))); color: var(--color-neutral-content); box-shadow: 0 1rem 2rem color-mix(in oklab, var(--color-neutral) 20%, transparent); }
.number-bonds__wander-card { display: block; min-height: 15rem; width: 100%; border: 1px solid color-mix(in oklab, var(--color-primary) 28%, var(--number-bonds-line)); border-radius: var(--radius-box); padding: clamp(1.25rem, 3vw, 2rem); background: color-mix(in oklab, var(--color-primary) 7%, var(--color-base-100)); }
.number-bonds__wander-card:hover { border-color: var(--color-primary); transform: translateY(-.12rem); }
.number-bonds__wander-mark { display: inline-flex; width: 3.5rem; height: 3.5rem; align-items: center; justify-content: center; border-radius: var(--radius-box); background: var(--color-primary); color: var(--color-primary-content); font-size: 1.35rem; font-weight: 900; }
.number-bonds__mode-grid { display: grid; gap: .8rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.number-bonds__mode-button { display: flex; width: 100%; min-height: 9rem; align-items: center; gap: .8rem; border: 1px solid var(--number-bonds-line); border-radius: var(--radius-field); padding: .9rem; background: var(--color-base-100); text-align: left; }
.number-bonds__mode-button:hover { border-color: var(--color-secondary); background: color-mix(in oklab, var(--color-secondary) 6%, var(--color-base-100)); }
.number-bonds__mode-mark { display: inline-flex; min-width: 3.4rem; height: 3.4rem; flex: 0 0 auto; align-items: center; justify-content: center; border-radius: var(--radius-field); background: color-mix(in oklab, var(--color-primary) 15%, transparent); color: var(--color-primary); font-size: .95rem; font-weight: 900; }
.number-bonds__mode-button.secondary .number-bonds__mode-mark { background: color-mix(in oklab, var(--color-secondary) 15%, transparent); color: var(--color-secondary); }
.number-bonds__mode-button.accent .number-bonds__mode-mark { background: color-mix(in oklab, var(--color-accent) 15%, transparent); color: var(--color-accent); }
.number-bonds__mode-arrow { font-size: 1.25rem; color: color-mix(in oklab, var(--number-bonds-ink) 45%, transparent); }
.number-bonds__game-topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--number-bonds-line); padding-bottom: 1rem; }
.number-bonds__untimed { border: 1px solid color-mix(in oklab, var(--color-secondary) 35%, var(--number-bonds-line)); border-radius: 999px; padding: .42rem .75rem; background: color-mix(in oklab, var(--color-secondary) 10%, var(--color-base-100)); font-size: .8rem; font-weight: 800; white-space: nowrap; }
.number-bonds__progress { height: .45rem; margin-top: 1rem; overflow: hidden; border-radius: 999px; background: var(--color-base-200); }
.number-bonds__progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--color-secondary), var(--color-primary)); }
.number-bonds__stage { min-height: clamp(32rem, 64vh, 46rem); margin-top: 1.5rem; border: 1px solid var(--number-bonds-line); border-radius: var(--radius-box); padding: clamp(1.25rem, 5vw, 4rem); background: linear-gradient(180deg, color-mix(in oklab, var(--color-secondary) 6%, var(--color-base-100)), var(--color-base-100) 13rem); box-shadow: 0 1rem 2.5rem color-mix(in oklab, var(--color-neutral) 10%, transparent); }
.number-bonds__stage:focus { outline: 3px solid var(--color-primary); outline-offset: 3px; }
.number-bonds__prompt { max-width: 60rem; margin: 0 auto; text-align: center; }
.number-bonds__challenge-title { max-width: 50rem; margin: .65rem auto 0; }
.number-bonds__instruction { max-width: 42rem; margin: .85rem auto 0; color: color-mix(in oklab, var(--number-bonds-ink) 65%, transparent); }
.number-bonds__choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; max-width: 32rem; margin: 2rem auto 0; }
.number-bonds__choice { display: flex; min-height: 4.5rem; align-items: center; justify-content: center; border: 1px solid var(--number-bonds-line); border-radius: var(--radius-field); background: var(--color-base-100); font-size: 1.1rem; font-weight: 900; }
.number-bonds__choice:hover:not(:disabled) { border-color: var(--color-primary); }
.number-bonds__choice[data-state="incorrect"] { border-color: color-mix(in oklab, var(--color-error) 55%, var(--number-bonds-line)); background: color-mix(in oklab, var(--color-error) 8%, var(--color-base-100)); }
.number-bonds__choice:disabled { cursor: default; opacity: .72; }
.number-bonds__answer-panel { max-width: 52rem; margin: 2rem auto 0; border: 1px solid color-mix(in oklab, var(--color-success) 32%, var(--number-bonds-line)); border-radius: var(--radius-box); padding: 1.25rem; background: color-mix(in oklab, var(--color-success) 7%, var(--color-base-100)); text-align: center; }
.number-bonds__answer-copy { margin: .75rem auto 1.1rem; max-width: 42rem; line-height: 1.5; }
.number-bonds__pause-notice { margin-top: 1.5rem; border: 1px dashed color-mix(in oklab, var(--color-secondary) 40%, var(--number-bonds-line)); border-radius: var(--radius-field); padding: 1rem; text-align: center; }
.number-bonds__feedback { min-height: 2rem; margin: 1rem auto 0; max-width: 54rem; text-align: center; }
.number-bonds__feedback[data-state="correct"] { color: var(--color-success); font-weight: 750; }
.number-bonds__feedback[data-state="incorrect"] { color: var(--color-error); font-weight: 700; }
.number-bonds__results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1rem; max-width: 54rem; margin-inline: auto; }
.number-bonds__result-card { min-height: 9rem; border: 1px solid var(--number-bonds-line); border-radius: var(--radius-box); padding: 1.25rem; text-align: center; }
.number-bonds__result-card strong { display: block; margin-top: .55rem; color: var(--color-primary); font-size: 2rem; font-weight: 900; }
.number-bonds__game.is-paused .number-bonds__stage { opacity: .6; }
.number-bonds__mode-button:focus-visible, .number-bonds__wander-card:focus-visible, .number-bonds__choice:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }
@media (max-width: 720px) { .number-bonds__mode-grid { grid-template-columns: 1fr; } .number-bonds__stage { min-height: 30rem; padding: 1.25rem; } .number-bonds__game-topbar { align-items: flex-start; } }
.number-bonds__hero-sum { font-size: clamp(2.4rem, 6vw, 3.6rem); font-weight: 950; font-variant-numeric: tabular-nums; color: var(--color-accent); }
.number-bonds__pills { display: flex; flex-wrap: wrap; gap: .5rem; }
.number-bonds__pill { min-height: 2.6rem; padding: .4rem 1rem; border: 1px solid var(--number-bonds-line); border-radius: 999px; background: var(--color-base-100); font-weight: 800; }
.number-bonds__pill[aria-pressed="true"] { border-color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 12%, var(--color-base-100)); color: var(--color-primary); }
.number-bonds__family { display: grid; justify-items: center; gap: .85rem; margin: 2rem auto 0; }
.number-bonds__parts { display: flex; gap: 1rem; }
.number-bonds__cell { display: inline-flex; width: 4.4rem; height: 4.4rem; align-items: center; justify-content: center; border: 2px solid var(--number-bonds-ink); border-radius: .85rem; font-size: 1.45rem; font-weight: 900; background: var(--color-base-100); }
.number-bonds__cell.is-missing { border-style: dashed; color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 8%, var(--color-base-100)); }