.project-file-title {
    position: relative;
    margin-top: 20px;
    margin-bottom: 10px;
    padding-bottom: 7px;
    font-size: 2.1rem;
    font-weight: 600;
}

.project-file-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 5px;
    background: var(--primary-color);
    border-radius: 3px;
}

.project-file-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

.project-file-header-separator {
    width: 100%;
    height: 2px;
    background: var(--separator, #e0e0e0);
    margin: 12px 0 30px 0;
    border-radius: 4px;
}

.project-file-details {
    max-width: 700px;
    margin: 0 auto 40px auto;
    padding: 32px 18px;
    background: var(--primary-background, #1b1b1b);
    border-radius: 16px;
    box-shadow: 0 2px 16px rgba(20, 20, 20, 0.09);
}

.project-file-thumb {
    width: 100%;
    border-radius: 15px;
    margin-bottom: 24px;
    display: block;
}

.project-file-section-title {
    font-size: 1.45rem;
    margin-bottom: 14px;
    margin-top: 28px;
    font-weight: 600;
}

.project-file-description {
    margin-bottom: 16px;
    font-size: 1.06rem;
    color: var(--paragraph-color, #d6d6d6);
}

.project-file-list {
    margin: 18px 0 18px 28px;
    font-size: 1.07rem;
    color: var(--paragraph-color, #d6d6d6);
    list-style: disc inside;
}

.project-file-quote {
    background: var(--primary-background, #1b1b1b);
    padding: 20px 24px;
    border-left: 5px solid var(--primary-color);
    border-radius: 15px;
    margin: 28px 0;
    font-size: 1.08rem;
    font-style: italic;
    color: var(--primary-color);
}

.project-file-tags {
    margin-bottom: 18px;
    margin-top: 14px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* button styles */
.project-file-tag {
    background: var(--paragraph-color, #d6d6d6);
    color: var(--primary-background, #1b1b1b);
    padding: 5px 12px;
    border-radius: 10px;
    font-size: 0.93rem;
    font-weight: 500;
    margin-right: 2px;
    margin-bottom: 6px;
    letter-spacing: 0.05em;
    display: inline-block;
}

.project-file-button {
    background: var(--primary-color);
    color: #fff;
    border-radius: 10px;
    padding: 10px 18px;
    border: none;
    font-size: 1.03rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 2px 16px rgba(24, 146, 95, .08);
    transition: background 0.2s;
    display: inline-block;
    margin-top: 14px;
}

.project-file-button:hover,
.project-file-button:focus {
    background: var(--darker-primary-color, #116e48);
    color: #fff;
}

.project-file-button-back {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 5px 10px;
    border-radius: var(--border-radius-15);
    margin: 10px 0;
    color: var(--primary-text-color);
    font-size: 25px;
    text-align: center;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

.project-file-button-back:hover {
    transform: scale(1.07, 1.07);
    background: var(--darker-primary-color);
}

@media (min-width: 1024px) {
    .project-file-button-back {
        position: unset;
        bottom: unset;
        right: unset;
    }
}