.page-container-navigation {
    width: 100%;
    position: relative;
    min-height: calc(100vh - 80px);

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 60px 30px;
    overflow: hidden;
}

.transparent-dark-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(
            90deg,
            rgba(8, 25, 31, 0.65) 0%,
            rgba(8, 25, 31, 0.38) 60%,
            rgba(8, 25, 31, 0.25) 100%
        );
    z-index: 0;
}

.app-introduction {
    max-width: 750px;
    margin-bottom: 50px;
    color: white;
}

.app-introduction h1 {
    font-size: 3.5rem;
    line-height: 1;
    letter-spacing: 0.05em;
    margin: 0 0 18px;
    color: var(--main-title);
    -webkit-text-stroke: 1px var(--favorite-text);
}

/* -----------------------------navigation----------------------------- */
.navigation-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    max-width: 600px;
}

.navigation-card {
    position: relative;
    display: flex;
    align-items: flex-start;
    height: 100%;
    min-height: 150px;
    padding: 24px 30px;

    background: var(--main-title);
    color: var(--filter-text);
    border-radius: 8px;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.navigation-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.99);
}

.navigation-content h2 {
    margin: 0 0 10px;
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.3;
}

.navigation-content p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--gray-text);
}

.navigation-arrow {
    position: absolute;
    right: 25px;
    top: 25px;
    font-size: 1.3rem;
    color: var(--gray-text);
}

.navigation-card:hover .navigation-arrow {
    transform: translate(4px, -4px);
}
/* --------------------------------------------------------------- */





@media (max-width: 768px) {
    .app-introduction {
        margin-bottom: 35px;
    }

    .app-introduction h1 {
        font-size: 2rem;
        -webkit-text-stroke: 0;
        text-shadow:
            -1px -1px 0 var(--favorite-text),
             1px -1px 0 var(--favorite-text),
            -1px  1px 0 var(--favorite-text),
             1px  1px 0 var(--favorite-text)
    }

    .navigation-grid {
        gap: 12px;
    }

    .navigation-card {
        min-height: 145px;
        padding: 20px 16px;
    }

    .navigation-content {
        padding-right: 10px;
    }

    .navigation-content h2 {
        font-size: 1.05rem;
    }

    .navigation-content p {
        font-size: 0.85rem;
    }

    .navigation-arrow {
        right: 12px;
        top: 12px;
        font-size: 1rem;
    }
}