body {
    background: #f8fafc;
}

main.public-theory-index-page,
main.public-theory-detail-page {
    box-sizing: border-box;
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
}

.public-theory {
    width: min(1100px, calc(100% - 40px));
    margin: 0 auto;
    padding: 34px 0 90px;
}

.public-theory__hero {
    display: grid;
    max-width: 800px;
    gap: 18px;
    padding: clamp(80px, 14vw, 160px) 0 70px;
}

.public-theory__hero p {
    margin: 0;
    color: #4f46e5;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.public-theory h1 {
    margin: 0;
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: clamp(46px, 8vw, 92px);
    line-height: .96;
    letter-spacing: -.06em;
}

.public-theory__hero > span {
    max-width: 620px;
    color: #71717a;
    font-size: clamp(17px, 2vw, 21px);
    line-height: 1.55;
}

.public-theory h2 {
    margin-bottom: 24px;
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: 30px;
}

.public-theory ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 0 0 44px;
    padding: 0;
    list-style: none;
}

.public-theory li a {
    display: grid;
    min-height: 170px;
    gap: 16px;
    padding: 26px;
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    background: #fff;
    color: #18181b;
}

.public-theory li a:hover {
    border-color: #a5b4fc;
    transform: translateY(-2px);
}

.public-theory li a.is-preparing {
    background: #f8fafc;
}

.public-theory li span,
.public-theory li small {
    color: #71717a;
    font-size: 12px;
}

.public-theory li strong {
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: 21px;
}

.public-theory li small {
    align-self: end;
    color: #4f46e5;
    font-weight: 800;
}

.public-theory__solver {
    display: inline-flex;
    padding: 15px 20px;
    border-radius: 13px;
    background: #4f46e5;
    color: #fff;
    font-weight: 800;
}

.public-theory-detail {
    --theory-accent: #4f46e5;
    --theory-ink: #18181b;
    --theory-muted: #71717a;
    --theory-line: #e2e8f0;
    --theory-soft: #eef2ff;
    width: min(1140px, calc(100% - 48px));
    margin: 0 auto;
    padding: 34px 0 100px;
    color: var(--theory-ink);
}

.public-theory-detail__breadcrumbs {
    display: flex;
    gap: 8px;
    color: var(--theory-muted);
    font-size: 12px;
}

.public-theory-detail__breadcrumbs a {
    color: var(--theory-muted);
}

.public-theory-detail__breadcrumbs a:hover {
    color: var(--theory-accent);
}

.public-theory-detail__hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 40px;
    min-height: 460px;
    padding: clamp(70px, 12vw, 140px) 0 64px;
    border-bottom: 1px solid var(--theory-line);
}

.public-theory-detail__hero > div {
    display: grid;
    min-width: 0;
    max-width: 820px;
    gap: 20px;
}

.public-theory-detail__hero p,
.public-theory-detail__content section > span,
.public-theory-practice > div > span,
.public-theory-detail__preparing > span {
    margin: 0;
    color: var(--theory-accent);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.public-theory-detail__hero h1 {
    max-width: 900px;
    margin: 0;
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: clamp(54px, 8.5vw, 112px);
    line-height: .92;
    letter-spacing: -.065em;
}

.public-theory-detail__hero div > span {
    max-width: 650px;
    color: var(--theory-muted);
    font-size: clamp(17px, 2vw, 22px);
    line-height: 1.55;
}

.public-theory-detail__hero > strong {
    color: var(--theory-soft);
    font-family: "JetBrains Mono", monospace;
    font-size: clamp(90px, 16vw, 210px);
    line-height: .75;
    letter-spacing: -.09em;
}

.public-theory-detail__layout {
    display: grid;
    grid-template-columns: 190px minmax(0, 760px);
    justify-content: space-between;
    gap: clamp(50px, 10vw, 130px);
    padding: 90px 0;
}

.public-theory-detail__layout > aside {
    position: sticky;
    top: 108px;
    display: grid;
    align-self: start;
    gap: 4px;
    padding-left: 18px;
    border-left: 2px solid var(--theory-line);
}

.public-theory-detail__layout > aside span {
    margin-bottom: 10px;
    color: var(--theory-muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.public-theory-detail__layout > aside a {
    padding: 7px 0;
    color: var(--theory-muted);
    font-size: 13px;
    font-weight: 700;
}

.public-theory-detail__layout > aside a:hover {
    color: var(--theory-accent);
}

.public-theory-detail__content {
    display: grid;
    gap: 88px;
}

.public-theory-detail__content section {
    scroll-margin-top: 100px;
}

.public-theory-detail__content h2,
.public-theory-practice h2,
.public-theory-detail__preparing h2 {
    max-width: 720px;
    margin: 14px 0 18px;
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: clamp(31px, 4.5vw, 56px);
    line-height: 1.02;
    letter-spacing: -.05em;
}

.public-theory-detail__content p,
.public-theory-practice p,
.public-theory-detail__preparing p {
    max-width: 660px;
    margin: 0;
    color: var(--theory-muted);
    font-size: clamp(16px, 1.8vw, 19px);
    line-height: 1.7;
}

.public-theory-detail__formula {
    padding: clamp(28px, 5vw, 52px);
    border-radius: 26px;
    background: var(--theory-accent);
    color: #fff;
}

.public-theory-detail__formula > span,
.public-theory-detail__formula p {
    color: #c7d2fe !important;
}

.public-theory-detail__formula h2 {
    font-family: "JetBrains Mono", monospace;
    font-size: clamp(25px, 4vw, 45px);
    letter-spacing: -.045em;
}

.public-theory-detail__content ol {
    display: grid;
    gap: 0;
    margin: 26px 0 0;
    padding: 0;
    list-style: none;
}

.public-theory-detail__content li {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    align-items: center;
    gap: 18px;
    min-height: 72px;
    border-top: 1px solid var(--theory-line);
    font-size: 16px;
    font-weight: 700;
}

.public-theory-detail__content li:last-child {
    border-bottom: 1px solid var(--theory-line);
}

.public-theory-detail__content li span {
    color: var(--theory-accent);
    font-family: "JetBrains Mono", monospace;
    font-size: 12px;
}

.public-theory-detail__mistake {
    padding: clamp(28px, 5vw, 48px);
    border: 1px solid #fed7aa;
    border-radius: 26px;
    background: #fff7ed;
}

.public-theory-detail__mistake > span {
    color: #c2410c !important;
}

.public-theory-detail__preparing {
    max-width: 760px;
    padding: 90px 0;
}

.public-theory-practice {
    scroll-margin-top: 96px;
    padding: clamp(36px, 7vw, 72px);
    border-radius: 32px;
    background: var(--theory-soft);
}

.public-theory-practice > div {
    max-width: 680px;
}

.public-theory-practice ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 38px 0 30px;
    padding: 0;
    list-style: none;
}

.public-theory-practice li a {
    display: grid;
    min-height: 126px;
    gap: 7px;
    padding: 20px;
    border: 1px solid #c7d2fe;
    border-radius: 17px;
    background: #fff;
    color: var(--theory-ink);
}

.public-theory-practice li a:hover {
    border-color: var(--theory-accent);
    transform: translateY(-2px);
}

.public-theory-practice li span,
.public-theory-practice li small {
    color: var(--theory-muted);
    font-family: "JetBrains Mono", monospace;
    font-size: 11px;
}

.public-theory-practice li strong {
    font-family: "Plus Jakarta Sans", sans-serif;
    font-size: 17px;
}

.public-theory-practice__button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 13px 18px;
    border-radius: 13px;
    background: var(--theory-accent);
    color: #fff;
    font-weight: 800;
}

@media (max-width: 700px) {
    .public-theory {
        width: min(calc(100% - 28px), 1100px);
    }

    .public-theory ol {
        grid-template-columns: 1fr;
    }

    .public-theory-detail {
        width: min(calc(100% - 28px), 1140px);
        padding-top: 20px;
    }

    .public-theory-detail__breadcrumbs {
        overflow: hidden;
        white-space: nowrap;
    }

    .public-theory-detail__hero {
        grid-template-columns: 1fr;
        min-height: 0;
        padding: 70px 0 42px;
    }

    .public-theory-detail__hero h1 {
        overflow-wrap: anywhere;
        font-size: clamp(40px, 10.5vw, 58px);
    }

    .public-theory-detail__hero > strong {
        display: none;
    }

    .public-theory-detail__layout {
        grid-template-columns: 1fr;
        padding: 58px 0;
    }

    .public-theory-detail__layout > aside {
        display: none;
    }

    .public-theory-detail__content {
        gap: 58px;
    }

    .public-theory-practice {
        padding: 26px 20px;
        border-radius: 24px;
    }

    .public-theory-practice ol {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .public-theory li a,
    .public-theory-practice li a {
        transition: none;
    }
}