.number-builder-page { --builder-ink: var(--color-base-content); --builder-muted: color-mix(in oklab, var(--builder-ink) 67%, transparent); --builder-line: var(--color-base-300); }
.number-builder__hero { background-image: radial-gradient(circle at 8% 20%, color-mix(in oklab, var(--color-primary) 15%, transparent), transparent 24rem), radial-gradient(circle at 90% 10%, color-mix(in oklab, var(--color-secondary) 12%, transparent), transparent 22rem); }
.number-builder__hero-card { min-height: 22rem; border: 1px solid color-mix(in oklab, var(--color-primary) 30%, var(--color-neutral)); border-radius: var(--radius-box); padding: 2rem; background: radial-gradient(circle at 100% 0%, color-mix(in oklab, var(--color-secondary) 46%, transparent) 0 7rem, transparent 15rem), linear-gradient(145deg, var(--color-neutral), color-mix(in oklab, var(--color-neutral) 78%, var(--color-primary))); box-shadow: 0 1.1rem 2.5rem color-mix(in oklab, var(--color-neutral) 18%, transparent); }
.number-builder__hero-tile { display: inline-flex; width: 3rem; height: 3rem; align-items: center; justify-content: center; border-radius: .8rem; font-size: 1.4rem; font-weight: 900; }
.number-builder__hero-tile--primary { background: var(--color-primary); color: var(--color-primary-content); }
.number-builder__hero-tile--secondary { background: var(--color-secondary); color: var(--color-secondary-content); }
.number-builder__hero-tile--accent { background: var(--color-accent); color: var(--color-accent-content); }
.number-builder__wander-card { display: block; width: 100%; min-height: 14rem; border: 1px solid color-mix(in oklab, var(--color-primary) 30%, var(--builder-line)); border-radius: var(--radius-box); padding: clamp(1.25rem, 3vw, 2rem); background: color-mix(in oklab, var(--color-primary) 6%, var(--color-base-100)); color: var(--builder-ink); transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease; }
.number-builder__wander-card:hover { border-color: var(--color-primary); transform: translateY(-.12rem); box-shadow: 0 .9rem 2rem color-mix(in oklab, var(--color-primary) 12%, transparent); }
.number-builder__wander-mark { display: inline-flex; width: 3.5rem; height: 3.5rem; align-items: center; justify-content: center; border-radius: 1rem; background: var(--color-primary); color: var(--color-primary-content); font-size: 1.7rem; font-weight: 900; }
.number-builder__mode-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.number-builder__mode-button { display: flex; width: 100%; align-items: center; gap: .8rem; border: 1px solid var(--builder-line); border-radius: var(--radius-field); padding: 1rem; background: var(--color-base-100); color: var(--builder-ink); text-align: left; transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease; }
.number-builder__mode-button:hover { border-color: var(--color-secondary); background: color-mix(in oklab, var(--color-secondary) 6%, var(--color-base-100)); transform: translateY(-.1rem); }
.number-builder__mode-mark { display: inline-flex; width: 3.2rem; height: 3.2rem; flex: 0 0 auto; align-items: center; justify-content: center; border-radius: .75rem; font-size: 1.05rem; font-weight: 900; }
.number-builder__mode-button.primary .number-builder__mode-mark { background: color-mix(in oklab, var(--color-primary) 15%, transparent); color: var(--color-primary); }
.number-builder__mode-button.secondary .number-builder__mode-mark { background: color-mix(in oklab, var(--color-secondary) 15%, transparent); color: var(--color-secondary); }
.number-builder__mode-button.accent .number-builder__mode-mark { background: color-mix(in oklab, var(--color-accent) 15%, transparent); color: var(--color-accent); }
.number-builder__mode-arrow { color: var(--builder-muted); font-size: 1.4rem; }
.number-builder__game-topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--builder-line); padding-bottom: 1rem; }
.number-builder__untimed { border: 1px solid color-mix(in oklab, var(--color-secondary) 35%, var(--builder-line)); border-radius: 999px; padding: .42rem .75rem; background: color-mix(in oklab, var(--color-secondary) 10%, var(--color-base-100)); color: color-mix(in oklab, var(--color-secondary) 34%, var(--builder-ink)); font-size: .8rem; font-weight: 800; white-space: nowrap; }
.number-builder__progress { height: .45rem; margin-top: 1rem; overflow: hidden; border-radius: 999px; background: var(--color-base-200); }
.number-builder__progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--color-secondary), var(--color-primary)); transition: width 180ms ease; }
.number-builder__stage { min-height: clamp(29rem, 60vh, 42rem); margin-top: 1.5rem; border: 1px solid var(--builder-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); color: var(--builder-ink); box-shadow: 0 1rem 2.5rem color-mix(in oklab, var(--color-neutral) 10%, transparent); }
.number-builder__stage:focus { outline: 3px solid var(--color-secondary); outline-offset: 4px; }
.number-builder__prompt { max-width: 60rem; margin: 0 auto; text-align: center; }
.number-builder__challenge-title { max-width: 50rem; margin: .6rem auto 0; font-size: clamp(1.75rem, 4vw, 2.9rem); font-weight: 900; line-height: 1.12; }
.number-builder__instruction { max-width: 42rem; margin: .85rem auto 0; color: var(--builder-muted); }
.number-builder__choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; max-width: 44rem; margin: 3rem auto 0; }
.number-builder__choice { min-height: 5.6rem; border: 1px solid var(--builder-line); border-radius: var(--radius-field); background: var(--color-base-100); color: var(--builder-ink); font-size: clamp(1.35rem, 4vw, 2rem); font-weight: 900; font-variant-numeric: tabular-nums; transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease; }
.number-builder__choice:hover:not(:disabled) { border-color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 7%, var(--color-base-100)); transform: translateY(-.1rem); }
.number-builder__choice:disabled { cursor: default; opacity: .7; }
.number-builder__compare-hint { display: grid; width: 5rem; height: 5rem; place-items: center; margin: 2rem auto 0; border: 2px dashed color-mix(in oklab, var(--color-secondary) 45%, var(--builder-line)); border-radius: 1.2rem; color: var(--color-secondary); font-size: 2.5rem; font-weight: 900; }
.number-builder__highlighted-number { margin: 2rem auto 0; color: var(--builder-ink); font-size: clamp(3rem, 10vw, 6rem); font-weight: 950; line-height: 1; text-align: center; font-variant-numeric: tabular-nums; }
.number-builder__highlighted-number mark { border-radius: .3rem; padding: 0 .08em; background: color-mix(in oklab, var(--color-accent) 48%, transparent); color: inherit; }
.number-builder__action-row { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin-top: 2rem; }
.number-builder__feedback { min-height: 2rem; margin: 1rem auto 0; color: var(--builder-ink); text-align: center; }
.number-builder__feedback[data-state="correct"] { color: color-mix(in oklab, var(--color-success) 75%, var(--builder-ink)); font-weight: 800; }
.number-builder__feedback[data-state="incorrect"] { color: color-mix(in oklab, var(--color-error) 75%, var(--builder-ink)); font-weight: 700; }
.number-builder__pause-notice { margin-top: 1rem; border: 1px solid color-mix(in oklab, var(--color-secondary) 30%, var(--builder-line)); border-radius: var(--radius-field); padding: 1rem; background: color-mix(in oklab, var(--color-secondary) 8%, var(--color-base-100)); text-align: center; }
.number-builder__results-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; max-width: 60rem; margin-right: auto; margin-left: auto; }
.number-builder__result-card { min-height: 8rem; border: 1px solid var(--builder-line); border-radius: var(--radius-box); padding: 1.25rem; background: var(--color-base-100); text-align: center; }
.number-builder__result-card strong { display: block; margin-top: .5rem; color: var(--color-primary); font-size: 2.2rem; font-variant-numeric: tabular-nums; }
.number-builder__result-card span { color: color-mix(in oklab, var(--builder-ink) 58%, transparent); font-size: .8rem; font-weight: 800; text-transform: uppercase; }
.number-builder__stage button:focus-visible, .number-builder__wander-card:focus-visible, .number-builder__mode-button:focus-visible { outline: 3px solid var(--color-secondary); outline-offset: 3px; }
@media (max-width: 767px) { .number-builder__hero-card { min-height: 17rem; padding: 1.5rem; } .number-builder__mode-grid { grid-template-columns: 1fr; } .number-builder__game-topbar { align-items: flex-start; flex-direction: column; } .number-builder__stage { min-height: auto; padding: 1.25rem; } .number-builder__choice-grid { gap: .65rem; margin-top: 2rem; } .number-builder__choice { min-height: 4.5rem; } .number-builder__results-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .number-builder__wander-card, .number-builder__mode-button, .number-builder__progress span, .number-builder__choice { transition: none; } }