.install-header {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 20px 0 0;
}

.install-header-inner {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 12px 18px;
    border: 1px solid var(--monos-card-stroke);
    border-radius: 999px;
    background: rgba(8, 10, 16, 0.72);
    backdrop-filter: blur(18px);
    box-shadow: 0 16px 40px var(--monos-shadow-soft);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--monos-ink);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition:
        color 0.2s ease,
        background-color 0.2s ease,
        transform 0.2s ease;
}

.back-link:hover {
    color: var(--monos-accent-strong);
    background: rgba(45, 184, 168, 0.08);
    transform: translateY(-1px);
}

.back-link svg,
.nav-btn svg,
.action-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.install-progress {
    padding: 28px 0 0;
}

.progress-card {
    overflow-x: auto;
    padding: 22px 24px;
    border: 1px solid var(--monos-card-stroke);
    border-radius: 32px;
    background: linear-gradient(180deg, rgba(31, 36, 44, 0.94) 0%, rgba(20, 24, 31, 0.9) 100%);
    box-shadow: 0 18px 48px var(--monos-shadow-soft);
    scrollbar-width: none;
}

.progress-card::-webkit-scrollbar {
    display: none;
}

.progress-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: max-content;
}

.progress-step {
    display: grid;
    grid-template-rows: 42px minmax(2.8em, auto);
    justify-items: center;
    gap: 10px;
    min-width: 96px;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 999px;
    border: 1px solid var(--monos-card-stroke-strong);
    background: rgba(255, 255, 255, 0.04);
    color: var(--monos-muted);
    font-size: 1rem;
    font-weight: 700;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        color 0.2s ease;
}

.step-number svg {
    width: 18px;
    height: 18px;
}

.progress-step.active .step-number,
.progress-step.completed .step-number {
    background: linear-gradient(135deg, var(--monos-accent), var(--monos-accent-strong));
    border-color: rgba(45, 184, 168, 0.28);
    color: #041411;
    box-shadow: 0 0 20px rgba(45, 184, 168, 0.22);
}

.step-label {
    color: var(--monos-muted);
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.35;
    text-align: center;
    text-wrap: pretty;
}

.progress-step.active .step-label,
.progress-step.completed .step-label {
    color: var(--monos-ink);
}

.progress-line {
    width: 72px;
    height: 2px;
    margin: 0 10px 26px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.progress-line.completed {
    background: rgba(45, 184, 168, 0.7);
}

.install-content {
    padding: 28px 0 72px;
}

.install-kicker {
    margin: 0;
    color: var(--monos-accent-strong);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-align: center;
    text-transform: uppercase;
}

.install-title {
    margin: 18px auto 0;
    max-width: 20ch;
    color: var(--monos-ink);
    font-size: clamp(2.3rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.04;
    text-align: center;
    text-wrap: balance;
}

.install-subtitle {
    margin: 16px auto 0;
    max-width: 44rem;
    color: var(--monos-muted-strong);
    font-size: 1.02rem;
    line-height: 1.7;
    text-align: center;
    text-wrap: pretty;
}

.requirements-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin: 0 auto 48px;
}

.requirement-card,
.instruction-card,
.source-action-card,
.faq-card,
.support-surface,
.screenshot-container,
.screenshot-item,
.nav-btn {
    border: 1px solid var(--monos-card-stroke);
    background: linear-gradient(180deg, rgba(31, 36, 44, 0.94) 0%, rgba(20, 24, 31, 0.9) 100%);
    box-shadow: 0 18px 48px var(--monos-shadow-soft);
}

.requirement-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 18px;
    align-items: start;
    min-width: 0;
    padding: 24px;
    border-radius: 28px;
}

.requirement-icon,
.instruction-number,
.download-icon-chip {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--monos-accent), rgba(45, 184, 168, 0.75));
    box-shadow: 0 10px 28px rgba(45, 184, 168, 0.24);
}

.requirement-icon {
    width: 50px;
    height: 50px;
    border-radius: 16px;
}

.requirement-icon svg {
    width: 24px;
    height: 24px;
    color: #ffffff;
}

.requirement-content {
    min-width: 0;
}

.requirement-content h3 {
    margin: 0 0 6px;
    color: var(--monos-ink);
    font-size: 1rem;
    font-weight: 700;
}

.requirement-content p {
    margin: 0;
    color: var(--monos-muted);
    line-height: 1.6;
}

.requirement-check {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    background: rgba(45, 184, 168, 0.14);
    color: var(--monos-accent);
}

.requirement-check svg {
    width: 16px;
    height: 16px;
}

.screenshot-container {
    max-width: 360px;
    margin: 0 auto 40px;
    padding: 12px;
    border-radius: 30px;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin: 0 auto 40px;
}

.screenshot-item {
    padding: 12px;
    border-radius: 28px;
}

.screenshot {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 22px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.step-instructions {
    display: grid;
    gap: 16px;
    max-width: 820px;
    margin: 0 auto 40px;
}

.instruction-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    min-width: 0;
    padding: 24px;
    border-radius: 28px;
}

.instruction-number {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 999px;
    color: #041411;
    font-size: 1rem;
    font-weight: 800;
}

.instruction-content {
    min-width: 0;
}

.instruction-content h3 {
    margin: 0 0 8px;
    color: var(--monos-ink);
    font-size: 1.06rem;
    font-weight: 700;
}

.instruction-content p {
    margin: 0;
    color: var(--monos-muted-strong);
    line-height: 1.7;
    text-wrap: pretty;
}

.inline-link {
    color: var(--monos-accent-strong);
    font-weight: 700;
    text-decoration: none;
}

.inline-link:hover {
    text-decoration: underline;
}

.source-action-card {
    max-width: 820px;
    margin: 0 auto 32px;
    padding: 28px;
    border-radius: 28px;
    text-align: center;
}

.source-action-card h3 {
    margin: 0;
    color: var(--monos-ink);
    font-size: 1.5rem;
    font-weight: 800;
    text-wrap: balance;
}

.source-action-card p {
    margin: 14px auto 0;
    max-width: 42rem;
    color: var(--monos-muted-strong);
    line-height: 1.7;
    text-wrap: pretty;
}

.source-url-container {
    display: flex;
    align-items: center;
    margin-top: 20px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    background: rgba(0, 0, 0, 0.28);
}

.source-url {
    width: 100%;
    color: var(--monos-muted-strong);
    font-family: ui-monospace, SFMono-Regular, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.92rem;
    line-height: 1.6;
    overflow-wrap: anywhere;
    text-align: left;
}

.action-btns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 54px;
    padding: 14px 18px;
    border: 1px solid transparent;
    border-radius: 18px;
    font-size: 0.98rem;
    font-weight: 700;
    text-decoration: none;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease,
        background-color 0.25s ease,
        color 0.25s ease;
    cursor: pointer;
}

.direct-btn,
.next-btn,
.success-btn {
    background: linear-gradient(135deg, var(--monos-accent), var(--monos-accent-strong));
    color: #041411;
}

.copy-btn,
.prev-btn,
.ghost-btn {
    color: var(--monos-ink);
    background: rgba(255, 255, 255, 0.03);
}

.copy-btn,
.prev-btn,
.ghost-btn,
.nav-btn {
    border-color: var(--monos-card-stroke-strong);
}

.direct-btn:hover,
.next-btn:hover,
.success-btn:hover,
.copy-btn:hover,
.prev-btn:hover,
.ghost-btn:hover,
.faq-card:hover {
    transform: translateY(-2px);
}

.direct-btn:hover,
.next-btn:hover,
.success-btn:hover {
    box-shadow: 0 22px 50px rgba(45, 184, 168, 0.25);
}

.copy-btn:hover,
.prev-btn:hover,
.ghost-btn:hover {
    border-color: rgba(45, 184, 168, 0.22);
    background: rgba(45, 184, 168, 0.08);
}

.copy-btn.copied {
    color: var(--monos-accent-strong);
    border-color: rgba(45, 184, 168, 0.24);
    background: rgba(45, 184, 168, 0.14);
}

.copy-status {
    min-height: 1.5em;
    margin: 14px 0 0;
    color: var(--monos-muted);
    font-size: 0.92rem;
}

.faq-section {
    display: grid;
    gap: 18px;
    max-width: 900px;
    margin: 0 auto 48px;
}

.faq-card {
    padding: 26px;
    border-radius: 28px;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease;
}

.faq-card:hover {
    border-color: rgba(45, 184, 168, 0.18);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.26);
}

.faq-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--monos-muted);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.faq-question {
    display: flex;
    gap: 12px;
    margin-top: 14px;
    color: var(--monos-ink);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.55;
}

.faq-question::before {
    content: "Q.";
    color: var(--monos-accent-strong);
    flex-shrink: 0;
}

.faq-answer {
    margin-top: 14px;
    padding-left: 34px;
    color: var(--monos-muted-strong);
    line-height: 1.7;
}

.faq-answer p {
    margin: 0 0 12px;
}

.faq-answer strong {
    color: var(--monos-ink);
}

.faq-list {
    margin: 10px 0 12px 1.25rem;
    padding: 0;
    color: var(--monos-muted);
    line-height: 1.7;
}

.important-note {
    margin-top: 16px;
    padding: 16px 18px;
    border: 1px solid rgba(45, 184, 168, 0.18);
    border-radius: 18px;
    background: rgba(45, 184, 168, 0.08);
}

.tips-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    margin-right: 6px;
    border-radius: 999px;
    background: rgba(45, 184, 168, 0.15);
    color: var(--monos-accent-strong);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.install-navigation {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    max-width: 900px;
    margin: 0 auto;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex: 1 1 220px;
    min-height: 56px;
    padding: 16px 24px;
    border-radius: 20px;
    color: var(--monos-ink);
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        border-color 0.25s ease,
        background-color 0.25s ease,
        color 0.25s ease;
}

.install-content + .footer {
    padding: 32px 0 40px;
    border-top: 1px solid var(--monos-card-stroke);
}

.install-content + .footer .copyright {
    font-size: 0.85rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 980px) {
    .requirements-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .install-header {
        padding-top: 14px;
    }

    .install-header-inner {
        border-radius: 28px;
    }

    .progress-card {
        border-radius: 28px;
        padding: 20px 18px;
    }

    .progress-line {
        width: 40px;
        margin: 0 8px 26px;
    }

    .requirements-list,
    .screenshot-grid,
    .action-btns {
        grid-template-columns: 1fr;
    }

    .requirement-card,
    .instruction-card {
        grid-template-columns: 1fr;
    }

    .instruction-number,
    .requirement-icon,
    .requirement-check {
        margin-bottom: 4px;
    }

    .faq-answer {
        padding-left: 0;
    }

    .install-navigation {
        flex-direction: column;
    }

    .nav-btn,
    .action-btn {
        flex: none;
        width: 100%;
        min-height: 54px;
        padding: 14px 20px;
    }
}

@media (max-width: 540px) {
    .progress-card {
        overflow-x: visible;
    }

    .progress-steps {
        width: 100%;
        min-width: 0;
        justify-content: space-between;
    }

    .install-title {
        font-size: 2rem;
    }

    .install-subtitle {
        font-size: 0.95rem;
    }

    .progress-step {
        min-width: 0;
    }

    .step-label {
        font-size: 0.68rem;
        word-break: keep-all;
    }

    .progress-line {
        flex: 1 1 12px;
        width: auto;
        min-width: 10px;
        margin: 0 4px 32px;
    }

    .requirement-card,
    .instruction-card,
    .source-action-card,
    .faq-card,
    .screenshot-container,
    .screenshot-item {
        padding: 20px;
        border-radius: 24px;
    }

    .nav-btn {
        padding: 14px 18px;
        border-radius: 20px;
        font-size: 0.95rem;
    }

    .source-url-container {
        padding: 12px 14px;
    }
}

@media (max-width: 360px) {
    .progress-card {
        padding: 18px 14px;
    }

    .step-number {
        width: 38px;
        height: 38px;
        font-size: 0.92rem;
    }

    .progress-step {
        grid-template-rows: 38px minmax(3.1em, auto);
    }

    .step-label {
        font-size: 0.74rem;
    }
}