body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    color: var(--text);
}

.install-navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: var(--nav-height, 60px);
    border-bottom: 1px solid var(--border);
    background: var(--card-bg);
}

.install-navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1rem;
}

.install-navbar-back {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-decoration: none;
}

.install-navbar-back:hover {
    color: var(--text);
}

.install-main {
    flex: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
    width: 100%;
}

.install-hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.install-hero-icon {
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 1rem;
}

.install-hero h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin: 0 0 0.5rem;
}

.install-hero p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0;
}

.install-visual {
    margin: 0 auto 2rem;
    max-width: 360px;
}

.install-visual img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow, 0 4px 24px rgba(0,0,0,0.08));
    background: var(--card, #fff);
}

.install-visual figcaption {
    margin-top: 0.75rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
    text-align: center;
}

.install-visual-actions {
    margin: 0.6rem 0 0;
    text-align: center;
    font-size: 0.85rem;
    line-height: 1.5;
}

.install-visual-actions a {
    color: var(--teal-dark, #0e7490);
    font-weight: 700;
    text-decoration: none;
}

.install-visual-actions a:hover {
    text-decoration: underline;
}

.install-os-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-2, #f1f5f9);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 2rem;
}

.install-os-tab {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 9px;
    background: transparent;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-muted);
    transition: background 0.15s, color 0.15s;
}

.install-os-tab.active {
    background: var(--card, #fff);
    color: var(--text);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.install-steps {
    display: none;
}

.install-steps.active {
    display: block;
}

.install-step {
    display: flex;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

.install-step:last-child {
    border-bottom: none;
}

.install-step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sgt-surface-muted);
    color: var(--sgt-interactive-accent);
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.install-step-body h3 {
    margin: 0 0 0.25rem;
    font-size: 0.975rem;
    font-weight: 700;
}

.install-step-body p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.install-step-icon {
    display: inline-block;
    background: var(--bg-2, #f1f5f9);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 0.4rem;
}

.install-tip {
    margin-top: 2rem;
    background: var(--bg-2, #f1f5f9);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.install-tip strong {
    color: var(--text);
}

.install-cta {
    margin-top: 2.5rem;
    text-align: center;
}

.install-cta a {
    display: inline-block;
    background: var(--action-primary, #0e7490);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    transition: opacity 0.15s;
}

.install-cta a:hover {
    background: var(--action-primary-hover, #155e75);
}

.install-cta p {
    margin: 0.75rem 0 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}