/* ------------------------------------------------------------------
   /use-cases/ Flagship Cluster Hub Styles (pxm2.io)
   Matches the cluster page standard: .page-ambient, flagship hero,
   TOC landmark rail, structured pillar groups, and shared components.
   ------------------------------------------------------------------ */

.uch-page {
    --uch-shell: 1160px;
    position: relative;
    color: var(--text-primary);
}

/* Hero Section */
.uch-hero {
    position: relative;
    text-align: center;
    max-width: var(--uch-shell);
    margin: 0 auto;
    padding: 3.5rem 1.5rem 2.5rem;
    z-index: 2;
}

.uch-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.95rem;
    border-radius: 999px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 1.4rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.uch-hero-eyebrow-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 3px var(--glow-color);
}

.uch-hero-title {
    font-family: 'Space Grotesk', var(--font-heading);
    font-size: clamp(2.3rem, 5.2vw, 3.8rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 1.2rem;
    letter-spacing: -0.035em;
    text-wrap: balance;
}

.uch-hero-title-line1 {
    display: block;
    color: var(--text-primary);
}

.uch-hero-title-line2 {
    display: block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover, var(--primary)) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: var(--primary);
}

.uch-hero-desc {
    font-size: clamp(1rem, 1.5vw, 1.14rem);
    color: var(--text-secondary);
    max-width: 66ch;
    margin: 0 auto 2rem auto;
    line-height: 1.65;
    text-wrap: pretty;
}

.uch-hero-actions {
    display: flex;
    justify-content: center;
    gap: 0.85rem;
    flex-wrap: wrap;
    margin-bottom: 2.75rem;
}

.uch-hero-actions .btn {
    padding: 0.75rem 1.6rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, color 0.18s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.uch-hero-actions .btn-primary {
    background: var(--primary);
    color: var(--white);
    border: 1px solid var(--primary);
    box-shadow: 0 4px 14px var(--glow-color);
}

[data-theme="dark"] .uch-hero-actions .btn-primary {
    color: #111;
}

.uch-hero-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--glow-color);
}

.uch-hero-actions .btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.uch-hero-actions .btn-secondary:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    color: var(--primary);
}

/* Hero Stat Strip (Matches /proxy-types/ and /guides/ layout) */
.uch-hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    max-width: 960px;
    margin: 0 auto;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--bg-secondary);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.uch-hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 1.25rem 1rem;
    border-left: 1px solid var(--border);
}

.uch-hero-stat:first-child {
    border-left: none;
}

.uch-hero-stat .number {
    display: block;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(1.2rem, 1.8vw, 1.55rem);
    color: var(--primary);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.uch-hero-stat .label {
    display: block;
    font-size: 0.78rem;
    line-height: 1.4;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Category Landmark Rail (TOC) */
.uch-toc {
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 0.5rem !important;
    height: auto !important;
    max-width: var(--uch-shell);
    margin: 2rem auto 0;
    padding: 0 1.5rem;
    border: none !important;
    background: transparent !important;
}

.uch-toc a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.uch-toc a:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.uch-toc .pxm2-icon {
    color: var(--primary);
}

/* Layout Container */
.uch-layout-container {
    max-width: var(--uch-shell);
    margin: 0 auto;
    padding: 3rem 1.5rem 0 1.5rem;
    box-sizing: border-box;
}

.uch-layout-container [id] {
    scroll-margin-top: 100px;
}

/* Section Rhythm */
.uch-section {
    margin: 4.5rem 0;
    width: 100%;
    box-sizing: border-box;
}

.uch-layout-container > .uch-section:first-child {
    margin-top: 1rem;
}

.uch-section-header {
    margin-bottom: 2.25rem;
}

.uch-section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.65rem, 3vw, 2.1rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
    position: relative;
}

.uch-section-subtitle {
    font-size: 1.02rem;
    color: var(--text-secondary);
    margin: 0;
    max-width: 72ch;
    line-height: 1.65;
}

.uch-section-center .uch-section-title,
.uch-section-center .uch-section-subtitle {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

/* Pillar Groups (Group Containers matching /proxy-types/ standard) */
.uch-group {
    margin-bottom: 3.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem 2rem 2.25rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    box-sizing: border-box;
}

.uch-group:last-child {
    margin-bottom: 0;
}

.uch-group-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding-bottom: 1.1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.uch-group-head-left {
    max-width: 680px;
}

.uch-group-eyebrow {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.65rem;
}

.uch-group-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.35rem 0.6rem;
    line-height: 1;
    flex-shrink: 0;
}

.uch-group-rule {
    height: 1px;
    width: 32px;
    background: var(--primary);
    opacity: 0.45;
}

.uch-group-kicker {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary);
}

.uch-group-name {
    font-family: var(--font-heading);
    font-size: clamp(1.35rem, 2.6vw, 1.75rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
}

.uch-group-tagline {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

.uch-pillar-explore {
    white-space: nowrap;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--primary);
    text-decoration: none;
    padding: 0.55rem 1.1rem;
    border: 1px solid var(--primary);
    border-radius: 999px;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.uch-pillar-explore:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-1px);
}

[data-theme="dark"] .uch-pillar-explore:hover {
    color: #111;
}

/* Directory Card Grid & Cards */
.uch-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.1rem;
    margin-top: 1.5rem;
}

.uch-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1.4rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--bg-secondary);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease, box-shadow 0.2s ease;
}

.uch-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), transparent 70%);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.uch-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: 0 10px 28px var(--glow-color);
}

.uch-card:hover::before {
    opacity: 1;
}

.uch-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.uch-card-top h3 {
    margin: 0;
    font-family: var(--font-heading);
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--text-primary);
}

.uch-card-arrow {
    color: var(--primary);
    flex-shrink: 0;
    opacity: 0.45;
    transition: transform 0.2s ease, opacity 0.2s ease;
    margin-top: 0.15rem;
}

.uch-card:hover .uch-card-arrow {
    transform: translateX(4px);
    opacity: 1;
}

.uch-card p {
    margin: 0 0 1.2rem;
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text-secondary);
    flex: 1;
}

.uch-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
    padding-top: 0.25rem;
}

.uch-card-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-tertiary);
    white-space: nowrap;
}

.uch-card-stat {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 0.75rem;
}

.uch-card-stat .value {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--primary);
}

.uch-card-stat .label {
    font-size: 0.74rem;
    color: var(--gray);
}

/* Decision Table Card */
.uch-table-card {
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--bg-secondary);
    overflow: hidden;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.uch-table-card .pxa-table-wrap {
    margin: 0;
    border: none;
    border-radius: 0;
}

/* Why mobile proxies grid */
.uch-why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.1rem;
    margin: 1.75rem 0;
}

.uch-why-card {
    display: flex;
    flex-direction: column;
    padding: 1.6rem 1.4rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--bg-secondary);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.uch-why-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.uch-why-num {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--primary);
    margin-bottom: 1.1rem;
}

.uch-why-card h3 {
    margin: 0 0 0.5rem;
    font-family: var(--font-heading);
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text-primary);
}

.uch-why-card p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Tools Marquee */
.uch-tools {
    padding: 3.5rem 0 2rem;
    overflow: hidden;
}

.uch-tools h3 {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gray);
    margin: 0 0 1.75rem;
}

.uch-tools-wrapper {
    display: flex;
    width: 100%;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.uch-tools-marquee {
    display: flex;
    flex-shrink: 0;
    width: max-content;
    animation: uchToolsTicker 30s linear infinite;
    align-items: center;
}

.uch-tools-track {
    display: flex;
    flex-shrink: 0;
    gap: 2rem;
    align-items: center;
    padding-right: 2rem;
}

.uch-tool-logo {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-secondary);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.65rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    transition: border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.uch-tool-logo:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.uch-tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--primary);
}

.uch-tool-icon .pxm2-icon {
    display: block;
    color: var(--primary);
}

.uch-tool-logo:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

@keyframes uchToolsTicker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.uch-tools-note {
    max-width: 720px;
    margin: 1.75rem auto 0;
    text-align: center;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* Bottom CTA Dual Actions */
.uch-cta-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.uch-cta-actions .btn {
    padding: 0.75rem 1.6rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    transition: all 0.2s ease;
}

.uch-cta-actions .btn-secondary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.uch-cta-actions .btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

/* Responsive Breakpoints */
@media (max-width: 820px) {
    .uch-group {
        padding: 1.5rem 1.25rem 1.75rem;
    }
    .uch-group-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 720px) {
    .uch-hero {
        padding: 2.5rem 1.25rem 2rem;
    }
    .uch-toc {
        flex-wrap: nowrap !important;
        justify-content: flex-start !important;
        overflow-x: auto;
        scrollbar-width: none;
        padding: 0 1.25rem 0.25rem;
    }
    .uch-toc::-webkit-scrollbar {
        display: none;
    }
    .uch-toc a {
        white-space: nowrap;
    }
    .uch-hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .uch-hero-stat:nth-child(3) {
        border-left: none;
    }
    .uch-hero-stat:nth-child(n + 3) {
        border-top: 1px solid var(--border);
    }
    .uch-layout-container {
        padding-top: 2rem;
    }
    .uch-section {
        margin: 3.5rem 0;
    }
}

@media (max-width: 480px) {
    .uch-hero-stats {
        grid-template-columns: 1fr;
    }
    .uch-hero-stat {
        border-left: none;
        border-top: 1px solid var(--border);
    }
    .uch-hero-stat:first-child {
        border-top: none;
    }
}