.card-grid {
    display: grid;
    grid-template-columns: fit-content(500px) fit-content(500px);
    column-gap: 5rem;
    row-gap: 3rem;
    align-items: center;
    justify-content: center;
}

.card-block {
    width: 100%;
    max-width: 550px;
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    border-radius: 18px;
}


.glass-shutter {
    position: absolute;
    right: 0;
    left: 0;
    bottom: 0;
    height: 60%;

    background: rgba(15, 20, 15, 0.35);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    backdrop-filter: blur(18px) saturate(160%);
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 18px 18px 0 0;

    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 20px 22px;
    box-sizing: border-box;

    transform: translateY(calc(100% - 65px));
    transition: transform .45s cubic-bezier(0.22, 1, 0.36, 1);
}

.card-block:hover .glass-shutter {
    transform: translateY(0);
}

.glass-shutter h4 {
    color: var(--white);
    font-size: 1.8rem;
    height: 45px;
    display: flex;
    align-items: center;

}

.project-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.3rem;
    font-family: inter, sans-serif;
    line-height: 1.2;
    margin-top: 10px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease 0.1s, transform 0.35s ease 0.1s;
}

.card-block:hover .project-desc {
    opacity: 1;
    transform: translateY(0);
}


.project-btn {
    margin-top: auto;
    align-self: flex-start;
    color: var(--dark);
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: 600;

    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease 0.15s, transform 0.35s ease 0.15s;
    text-decoration: none;
    outline: none;
    background: var(--blue);
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 40px;
}

.card-block:hover .project-btn {
    opacity: 1;
    transform: translateY(0);
}


.project-btn:before {
    content: '';
    background: linear-gradient(45deg, #0819af, #0a2b86, #080594, #1b38dd, #0c207a, #08147c, #0932b8, #04167c, #08126e);
    position: absolute;
    top: -2px;
    left: -2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 40px;
}

.project-btn:active {
    color: #000
}

.project-btn:active:after {
    background: transparent;
}

.project-btn:hover:before {
    opacity: 1;
}

.project-btn:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: #fff;
    left: 0;
    top: 0;
    border-radius: 40px;
}

.card-block img {
    width: 100%;
    display: block;
    border-radius: 30px;

}



.card-tall img {
    height: 400px;
    object-fit: cover;
    object-position: center;
}

.portfolio-text {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    margin-bottom: 8rem;
}

.placeholder-card {
    transform: translateY(-80px);
}

@media (max-width: 1100px) {
    .card-grid {
        column-gap: 3rem;
    }

    .portfolio-text {
        font-size: 3rem;
        margin-bottom: 5rem;
    }

    .glass-shutter h4 {
        font-size: 1.5rem;
    }

    .project-desc {
        font-size: 1.1rem;
    }
}

@media (max-width: 950px) {
    .card-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
        row-gap: 2rem;
    }

    .card-block {
        max-width: 100%;
    }

    .card-tall img {
        height: 350px;
    }

    .portfolio-text {
        font-size: 2.4rem;
        margin-bottom: 1rem;
    }

    .placeholder-card {
        transform: translateY(0);
    }
}

@media (max-width: 750px) {
    .portfolio-text {
        font-size: 2.3rem;
        margin-bottom: 0rem;
    }

    .card-tall img {
        height: 300px;
    }

    .glass-shutter {
        padding: 15px 18px;
    }

    .glass-shutter h4 {
        font-size: 1.3rem;
        height: 38px;
    }

    .project-desc {
        font-size: 1rem;
    }
}

@media (max-width: 500px) {
    .portfolio-text {
        font-size: 1.7rem;
        margin-bottom: 0rem;
    }

    .card-block {
        border-radius: 12px;
    }

    .card-block img {
        border-radius: 12px;
        height: 300px;
    }

    .glass-shutter {
        border-radius: 12px 12px 0 0;
        height: 65%;
    }

    .glass-shutter h4 {
        font-size: 1.15rem;
        height: 32px;
    }

    .project-desc {
        font-size: 1rem;
    }

    .project-btn {
        font-size: 0.85rem;
        padding: 8px 16px;
    }
}