header {
    background: linear-gradient(135deg, var(--orange-start), var(--orange-end));
    color: var(--text-light);
    text-align: center;
    padding: 4rem 0 3rem;
    position: relative;
}

header .logo {
    width: 110px;
    margin-bottom: 1rem;
    margin-top: -1.5rem;
    filter: drop-shadow(0 2px 10px rgba(0,0,0,0.08));
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.2rem;
}

header svg {
    display: block;
    width: 100%;
    height: 70px;
    position: absolute;
    left: 0;
    bottom: -1px;
}

.back-button {
    position: fixed;
    top: 1.2rem;
    left: 1.2rem;
    background: var(--dark);
    color: var(--text-light);
    padding: 0.6rem 0.8rem;
    border-radius: 10px;
    font-size: 1.2rem;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: background 0.2s ease, transform 0.15s ease;
}

.back-button:hover {
    background: var(--accent);
    color: var(--dark);
    transform: scale(1.05);
}

main {
    flex: 1 1 auto;
    padding: 3rem 0 2rem;
}

.install-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.install-item {
    display: flex;
    align-items: flex-start;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
    padding: 1rem;
    gap: 1rem;
    transition: transform .15s;
    position: relative;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.install-item:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 32px rgba(0,0,0,0.14);
}

.install-icon {
    font-size: 1.8rem;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.install-info h2 {
    font-size: 1.15rem;
    margin: 0 0 0.2rem 0;
    color: var(--dark);
    font-weight: 700;
}

.install-info p {
    margin: 0 0 0.3rem 0;
    color: #666;
    font-size: 1rem;
}

ol, ul {
    margin: 0.4rem 0 0.4rem 1.1rem;
}

.screenshot {
    margin-top: 0.6rem;
    max-width: 330px;
    border-radius: 7px;
    box-shadow: 0 2px 10px #0002;
    border: 2px solid #ececec;
    display: block;
}

.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
}

.lightbox-overlay img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 12px;
    box-shadow: 0 0 20px #000;
    transition: transform 0.2s ease;
    cursor: zoom-out;
}

code {
    background: #fff7ea;
    padding: 2px 7px;
    border-radius: 5px;
    color: #c06e00;
    font-size: 1em;
}

a {
    color: var(--accent);
    text-decoration: underline;
}

.coming-soon {
    background: #bbb;
    color: #fff;
    border-radius: 20px;
    padding: 0.4rem 1.2rem;
    font-size: 1rem;
    margin-left: 1rem;
    cursor: not-allowed;
    font-weight: 500;
    text-decoration: none;
    border: none;
    outline: none;
}

@media (max-width: 600px) {
    .install-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.7rem;
        padding: 0.8rem;
    }

    .install-info h2 {
        font-size: 1.05rem;
    }

    .screenshot {
        max-width: 100%;
    }

    .coming-soon {
        display: block;
        margin: 1rem 0 0 0;
    }
}