.number-line-page { --number-line-line: color-mix(in oklab, var(--color-base-content) 14%, transparent); --number-line-ink: var(--color-base-content); }
.number-line-page.is-playing .number-line__content { max-width: 100rem; padding-top: clamp(1rem, 2vw, 2rem); padding-bottom: clamp(2rem, 4vw, 4rem); }
.number-line-page.is-playing .number-line__hero { display: none; }
.number-line__hero-card { min-height: 22rem; overflow: hidden; border-radius: 1.5rem; 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-line__hero-track { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .35rem; height: 2.25rem; }
.number-line__hero-track span { border-radius: .5rem; background: var(--color-primary); transform: rotate(-2deg); }
.number-line__hero-track span:nth-child(2) { background: var(--color-secondary); transform: translateY(-.35rem) rotate(3deg); }
.number-line__hero-track span:nth-child(3) { background: var(--color-accent); transform: translateY(.2rem) rotate(-1deg); }
.number-line__hero-track span:nth-child(4) { background: color-mix(in oklab, var(--color-primary) 70%, var(--color-secondary)); transform: translateY(-.1rem) rotate(2deg); }
.number-line__wander-card { display: block; min-height: 15rem; width: 100%; border: 1px solid color-mix(in oklab, var(--color-primary) 28%, var(--number-line-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)); color: var(--number-line-ink); transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease; }
.number-line__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-line__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-line__level-grid { display: grid; gap: .8rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.number-line__level-button { display: flex; width: 100%; min-height: 9rem; align-items: center; gap: .8rem; border: 1px solid var(--number-line-line); border-radius: var(--radius-field); padding: .9rem; background: var(--color-base-100); color: var(--number-line-ink); text-align: left; transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease; }
.number-line__level-button:hover { border-color: var(--color-secondary); background: color-mix(in oklab, var(--color-secondary) 6%, var(--color-base-100)); transform: translateX(.1rem); }
.number-line__level-mark { display: inline-flex; min-width: 3.4rem; height: 3.4rem; flex: 0 0 auto; align-items: center; justify-content: center; border-radius: .75rem; background: color-mix(in oklab, var(--color-primary) 15%, transparent); color: var(--color-primary); font-size: .95rem; font-weight: 900; }
.number-line__level-button.secondary .number-line__level-mark { background: color-mix(in oklab, var(--color-secondary) 15%, transparent); color: var(--color-secondary); }
.number-line__level-button.accent .number-line__level-mark { background: color-mix(in oklab, var(--color-accent) 15%, transparent); color: var(--color-accent); }
.number-line__level-arrow { font-size: 1.25rem; color: color-mix(in oklab, var(--number-line-ink) 45%, transparent); }
.number-line__game-topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--number-line-line); padding-bottom: 1rem; }
.number-line__untimed { border: 1px solid color-mix(in oklab, var(--color-secondary) 35%, var(--number-line-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(--number-line-ink)); font-size: .8rem; font-weight: 800; white-space: nowrap; }
.number-line__progress { height: .45rem; margin-top: 1rem; overflow: hidden; border-radius: 999px; background: var(--color-base-200); }
.number-line__progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--color-secondary), var(--color-primary)); transition: width 180ms ease; }
.number-line__stage { min-height: clamp(32rem, 64vh, 46rem); margin-top: 1.5rem; border: 1px solid var(--number-line-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(--number-line-ink); box-shadow: 0 1rem 2.5rem color-mix(in oklab, var(--color-neutral) 10%, transparent); }
.number-line__stage:focus { outline: none; }
.number-line__prompt { max-width: 60rem; margin: 0 auto; text-align: center; }
.number-line__number { margin: 2rem auto 0; color: var(--color-primary); font-size: clamp(3.5rem, 12vw, 7rem); font-weight: 950; line-height: 1; letter-spacing: -.04em; font-variant-numeric: tabular-nums; text-align: center; }
.number-line__instruction { max-width: 42rem; margin: .85rem auto 0; color: color-mix(in oklab, var(--number-line-ink) 65%, transparent); }
.number-line__ruler { max-width: 72rem; margin: 4rem auto 0; }
.number-line__marks { display: flex; justify-content: space-between; gap: .5rem; color: color-mix(in oklab, var(--number-line-ink) 58%, transparent); font-size: .78rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.number-line__segment-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .45rem; margin-top: .45rem; border-top: .4rem solid color-mix(in oklab, var(--number-line-ink) 22%, transparent); }
.number-line__segment { position: relative; display: flex; min-height: 7.4rem; flex-direction: column; align-items: center; justify-content: flex-end; gap: 1rem; border: 0; border-right: 1px solid var(--color-base-100); padding: 0 .45rem 1rem; background: color-mix(in oklab, var(--color-primary) 22%, var(--color-base-100)); color: var(--number-line-ink); font-size: clamp(.76rem, 1.6vw, 1rem); font-weight: 850; font-variant-numeric: tabular-nums; transition: background-color 150ms ease, transform 150ms ease, box-shadow 150ms ease; }
.number-line__segment:nth-child(2) { background: color-mix(in oklab, var(--color-secondary) 23%, var(--color-base-100)); }
.number-line__segment:nth-child(3) { background: color-mix(in oklab, var(--color-accent) 27%, var(--color-base-100)); }
.number-line__segment:nth-child(4) { background: color-mix(in oklab, var(--color-primary) 13%, var(--color-secondary) 15%, var(--color-base-100)); }
.number-line__segment-mark { width: .9rem; height: 1.6rem; border-radius: 999px 999px .2rem .2rem; background: color-mix(in oklab, var(--number-line-ink) 36%, transparent); }
.number-line__segment:hover:not(:disabled) { z-index: 1; background: color-mix(in oklab, var(--color-primary) 35%, var(--color-base-100)); transform: translateY(-.35rem); box-shadow: 0 .8rem 1.4rem color-mix(in oklab, var(--color-neutral) 16%, transparent); }
.number-line__segment:nth-child(2):hover:not(:disabled) { background: color-mix(in oklab, var(--color-secondary) 38%, var(--color-base-100)); }
.number-line__segment:nth-child(3):hover:not(:disabled) { background: color-mix(in oklab, var(--color-accent) 42%, var(--color-base-100)); }
.number-line__segment[data-state="correct"] { outline: 4px solid color-mix(in oklab, var(--color-success) 65%, transparent); outline-offset: -4px; }
.number-line__segment[data-state="incorrect"] { outline: 4px solid color-mix(in oklab, var(--color-error) 58%, transparent); outline-offset: -4px; opacity: .58; }
.number-line__segment:disabled { cursor: default; }
.number-line__action-row { display: flex; justify-content: center; gap: .75rem; margin-top: 2rem; }
.number-line__pause-notice { margin-top: 1.5rem; border: 1px dashed color-mix(in oklab, var(--color-secondary) 40%, var(--number-line-line)); border-radius: var(--radius-field); padding: 1rem; background: color-mix(in oklab, var(--color-secondary) 7%, var(--color-base-100)); text-align: center; }
.number-line__feedback { min-height: 2rem; margin: 1rem auto 0; max-width: 54rem; color: color-mix(in oklab, var(--number-line-ink) 72%, transparent); text-align: center; }
.number-line__feedback[data-state="correct"] { color: var(--color-success); font-weight: 750; }
.number-line__feedback[data-state="incorrect"] { color: var(--color-error); font-weight: 700; }
.number-line__results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1rem; max-width: 54rem; margin-inline: auto; }
.number-line__result-card { min-height: 9rem; border: 1px solid var(--number-line-line); border-radius: var(--radius-box); padding: 1.25rem; background: var(--color-base-100); text-align: center; }
.number-line__result-card strong { display: block; margin-top: .55rem; color: var(--color-primary); font-size: 2rem; font-weight: 900; }
.number-line-page.is-paused .number-line__stage { opacity: .6; }
.number-line__level-button:focus-visible, .number-line__wander-card:focus-visible, .number-line__segment:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }
@media (max-width: 720px) { .number-line__level-grid { grid-template-columns: 1fr; } .number-line__stage { min-height: 30rem; padding: 1.25rem; } .number-line__game-topbar { align-items: flex-start; } .number-line__game-topbar > div:last-child { flex-wrap: wrap; justify-content: flex-end; } .number-line__ruler { margin-top: 3rem; } .number-line__segment { min-height: 6.2rem; padding-inline: .15rem; } .number-line__marks { font-size: .68rem; } }
@media (prefers-reduced-motion: reduce) { .number-line__wander-card, .number-line__level-button, .number-line__segment, .number-line__progress span { transition: none; } }