* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
    margin: 0;
}

body {
    background: var(--page-background);
    color: var(--page-font);
    font-family: Arial, Helvetica, sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.home-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
}

.home-header {
    text-align: center;
    margin-bottom: 28px;
}

.site-logo {
    width: 86px;
    height: 86px;
    object-fit: contain;
    margin-bottom: 12px;
}

.home-header h1 {
    margin: 0;
    font-size: clamp(30px, 5vw, 56px);
    line-height: 1.05;
}

.home-header p {
    margin: 10px 0 0;
    font-size: clamp(16px, 2vw, 22px);
    opacity: 0.78;
}

.number-grid {
    width: min(88vw, 620px);
    aspect-ratio: 1 / 1;
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    grid-template-areas:
        "p1 p2 p3"
        "p4 p5 p6"
        "p7 p8 p9";
    gap: clamp(10px, 2vw, 18px);
}

.number-card {
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    border: 2px solid var(--square-border);
    border-radius: 24px;
    background: var(--card-bg, var(--default-card-background));
    color: var(--card-font, var(--default-card-font));
    box-shadow: 0 18px 42px var(--square-shadow);
    text-align: center;
    transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.number-card:hover,
.number-card:focus-visible {
    background: var(--card-hover-bg, var(--default-card-hover-background));
    color: var(--card-hover-font, var(--default-card-hover-font));
    transform: translateY(-4px);
    outline: none;
}

.number-card-number {
    font-size: clamp(34px, 7vw, 72px);
    font-weight: 700;
    line-height: 1;
}

.number-card-title {
    font-size: clamp(13px, 2vw, 18px);
    font-weight: 700;
}

.number-card-hover {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    font-size: clamp(12px, 1.6vw, 16px);
    line-height: 1.35;
    transition: max-height 180ms ease, opacity 180ms ease;
}

.number-card:hover .number-card-hover,
.number-card:focus-visible .number-card-hover {
    max-height: 80px;
    opacity: 1;
}

.number-card-empty {
    visibility: hidden;
}

.layout-page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 280px 1fr;
}

.side-menu {
    background: var(--menu-background);
    color: var(--menu-font);
    border-right: 1px solid var(--square-border);
    padding: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.menu-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.menu-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 14px;
    margin-bottom: 8px;
    transition: background 160ms ease;
}

.menu-link:hover,
.menu-link.active {
    background: var(--menu-active-background);
    color: var(--menu-active-font);
}

.menu-number {
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid currentColor;
    border-radius: 999px;
    font-weight: 700;
}

.content-area {
    background: var(--content-background);
    color: var(--content-font);
    margin: clamp(16px, 3vw, 48px);
    padding: clamp(24px, 4vw, 56px);
    border-radius: 28px;
    box-shadow: 0 18px 42px var(--square-shadow);
    line-height: 1.65;
}

.content-area h1 {
    margin-top: 0;
    font-size: clamp(30px, 4vw, 52px);
    line-height: 1.1;
}

@media (max-width: 860px) {
    .layout-page {
        grid-template-columns: 1fr;
    }

    .side-menu {
        border-right: 0;
        border-bottom: 1px solid var(--square-border);
    }

    .side-menu nav {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .menu-link {
        margin-bottom: 0;
    }
}

@media (max-width: 560px) {
    .home-page {
        padding: 18px;
    }

    .number-grid {
        width: 94vw;
        gap: 8px;
    }

    .number-card {
        border-radius: 18px;
        padding: 10px;
    }

    .number-card-title {
        display: none;
    }

    .side-menu nav {
        grid-template-columns: 1fr;
    }

    .content-area {
        margin: 12px;
        padding: 22px;
        border-radius: 20px;
    }
}