:root {
    --vcd-bg: #f7f5f0;
    --vcd-paper: #ffffff;
    --vcd-surface: #ece8de;
    --vcd-ink: #1f2428;
    --vcd-muted: #626a70;
    --vcd-rule: #d8d2c4;
    --vcd-accent: #0f766e;
    --vcd-accent-dark: #0b5c56;
    --vcd-accent-soft: #d7efea;
    --vcd-cyan: #0891b2;
    --vcd-cyan-soft: #e0f7fb;
    --vcd-amber: #a9651f;
    --vcd-amber-soft: #fff4df;
    --vcd-night: #0c1219;
    --vcd-night-raised: #121c26;
    --vcd-night-rule: #294052;
    --vcd-night-text: #eef5f8;
    --vcd-night-muted: #9eb0bd;
    --vcd-success: #197047;
    --vcd-danger: #9f3636;
    --vcd-shadow: 0 20px 56px rgba(31, 36, 40, 0.1);
    --vcd-radius-sm: 6px;
    --vcd-radius-md: 10px;
    --vcd-radius-lg: 16px;
    --vcd-space-1: 4px;
    --vcd-space-2: 8px;
    --vcd-space-3: 12px;
    --vcd-space-4: 16px;
    --vcd-space-6: 24px;
    --vcd-space-8: 32px;
    --vcd-space-12: 48px;
    --vcd-space-16: 64px;
}

html {
    scroll-behavior: smooth;
}

body.vcd-page {
    background: var(--vcd-bg);
    color: var(--vcd-ink);
    font-family: "Segoe UI", "Noto Sans TC", system-ui, sans-serif;
    line-height: 1.7;
}

.vcd-page *,
.vcd-page *::before,
.vcd-page *::after {
    box-sizing: border-box;
}

.vcd-page img {
    display: block;
    max-width: 100%;
}

.vcd-page a {
    text-underline-offset: 0.2em;
}

.vcd-page :focus-visible {
    outline: 3px solid var(--vcd-cyan);
    outline-offset: 4px;
}

.vcd-container {
    width: min(1160px, calc(100% - 40px));
    margin-inline: auto;
}

.vcd-hero {
    position: relative;
    overflow: hidden;
    padding: 88px 0 72px;
    border-bottom: 1px solid var(--vcd-rule);
}

.vcd-hero::before {
    position: absolute;
    inset: 0;
    z-index: -2;
    content: "";
    background:
        linear-gradient(rgba(15, 118, 110, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 118, 110, 0.045) 1px, transparent 1px),
        radial-gradient(circle at 82% 18%, rgba(8, 145, 178, 0.12), transparent 34%);
    background-size: 28px 28px, 28px 28px, auto;
}

.vcd-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    gap: clamp(36px, 6vw, 76px);
    align-items: start;
}

.vcd-eyebrow,
.vcd-section-kicker,
.vcd-proof-label,
.vcd-story-index,
.vcd-system-label {
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.vcd-eyebrow,
.vcd-section-kicker {
    color: var(--vcd-accent);
}

.vcd-title {
    max-width: 780px;
    margin: 14px 0 22px;
    font-size: clamp(2.5rem, 6vw, 5.15rem);
    font-weight: 780;
    line-height: 0.98;
    letter-spacing: -0.04em;
}

.vcd-title-product {
    display: block;
    margin-bottom: 12px;
    color: var(--vcd-accent);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: clamp(1rem, 2.3vw, 1.4rem);
    font-weight: 700;
    letter-spacing: 0;
}

.vcd-lead {
    max-width: 66ch;
    margin: 0;
    color: #3f484f;
    font-size: clamp(1.05rem, 1.9vw, 1.28rem);
}

.vcd-role {
    max-width: 68ch;
    margin: 24px 0 0;
    padding-left: 18px;
    border-left: 3px solid var(--vcd-accent);
    color: var(--vcd-muted);
}

.vcd-actions,
.vcd-section-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.vcd-button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    padding: 11px 19px;
    border: 1px solid var(--vcd-ink);
    border-radius: var(--vcd-radius-sm);
    font-weight: 700;
    line-height: 1.25;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.vcd-button-primary {
    background: var(--vcd-ink);
    color: #ffffff;
}

.vcd-button-primary:hover {
    border-color: var(--vcd-accent-dark);
    background: var(--vcd-accent-dark);
    color: #ffffff;
}

.vcd-button-secondary {
    background: transparent;
    color: var(--vcd-ink);
}

.vcd-button-secondary:hover {
    border-color: var(--vcd-accent);
    background: var(--vcd-accent-soft);
    color: var(--vcd-accent-dark);
}

.vcd-proof-rail {
    display: grid;
    gap: 12px;
}

.vcd-proof-card {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    min-height: 94px;
    align-items: center;
    padding: 16px 18px;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-md);
    background: rgba(255, 255, 255, 0.82);
}

.vcd-proof-card strong {
    color: var(--vcd-ink);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: clamp(1.55rem, 3.2vw, 2.2rem);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.vcd-proof-card span {
    color: var(--vcd-muted);
    font-size: 0.94rem;
    line-height: 1.45;
}

.vcd-proof-scope {
    margin: 14px 0 0;
    color: var(--vcd-muted);
    font-size: 0.86rem;
}

.vcd-hero-prompt {
    padding: clamp(28px, 4vw, 44px);
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-lg);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--vcd-shadow);
}

.vcd-prompt-label {
    margin: 0 0 18px;
    color: var(--vcd-accent);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.vcd-hero-prompt h2 {
    margin: 0;
    font-size: clamp(1.45rem, 2.7vw, 2.25rem);
    font-weight: 750;
    line-height: 1.22;
    letter-spacing: -0.025em;
}

.vcd-prompt-list {
    display: grid;
    gap: 0;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
    counter-reset: prompt;
}

.vcd-prompt-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-top: 1px solid var(--vcd-rule);
    color: #3f484f;
    counter-increment: prompt;
}

.vcd-prompt-list li::before {
    color: var(--vcd-accent);
    content: "0" counter(prompt);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.84rem;
    font-weight: 700;
    flex-shrink: 0;
    padding-top: 1px;
}

.vcd-prompt-content {
    flex: 1;
    min-width: 0;
    font-size: 0.94rem;
    line-height: 1.5;
}

.vcd-prompt-content strong {
    color: var(--vcd-ink);
    display: inline-block;
    margin-right: 4px;
}

.vcd-hero-artifact {
    margin: 54px 0 0;
}

.vcd-artifact {
    margin: 0;
}

.vcd-artifact-link {
    position: relative;
    display: block;
    overflow: hidden;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-lg);
    background: var(--vcd-paper);
    box-shadow: var(--vcd-shadow);
}

.vcd-artifact-link::after {
    position: absolute;
    right: 16px;
    bottom: 16px;
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(12, 18, 25, 0.88);
    color: #ffffff;
    content: "放大檢視";
    font-size: 0.8rem;
    font-weight: 700;
}

.vcd-artifact-link:hover {
    border-color: var(--vcd-accent);
}

.vcd-artifact img {
    width: 100%;
    height: auto;
}

.vcd-artifact figcaption {
    margin-top: 12px;
    color: var(--vcd-muted);
    font-size: 0.88rem;
}

/* Dual & Triple Card Artifact Grid for Executive Report Cards & War Room */
.vcd-artifact-dual-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.vcd-artifact-triple-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.vcd-artifact-triple-grid .vcd-artifact-subcard {
    gap: 5px;
}

.vcd-artifact-triple-grid .vcd-artifact-subcard .vcd-artifact-link {
    height: 168px;
    overflow: hidden;
    display: block;
    position: relative;
    border-radius: var(--vcd-radius-sm);
    border: 1px solid var(--vcd-night-rule);
    background: var(--vcd-night-raised);
}

.vcd-artifact-triple-grid .vcd-artifact-subcard img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.25s ease, filter 0.25s ease;
}

.vcd-artifact-triple-grid .vcd-artifact-subcard .vcd-artifact-link:hover img {
    transform: scale(1.03);
    filter: brightness(1.08);
}

.vcd-artifact-subcard {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.vcd-artifact-subcard-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--vcd-accent-dark);
    font-family: "Cascadia Mono", Consolas, monospace;
}

.vcd-section-dark .vcd-artifact-subcard-label {
    color: #67e8f9;
}

.vcd-jump-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--vcd-rule);
    background: rgba(247, 245, 240, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.vcd-jump-inner {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-block: 10px;
    scrollbar-width: thin;
}

.vcd-jump-inner a {
    flex: 0 0 auto;
    padding: 7px 12px;
    border-radius: var(--vcd-radius-sm);
    color: var(--vcd-muted);
    font-size: 0.88rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.15s ease;
}

.vcd-jump-inner a:hover,
.vcd-jump-inner a:focus-visible {
    background: var(--vcd-accent-soft);
    color: var(--vcd-accent-dark);
}

/* In-Section Back to Nav Anchor */
.vcd-back-to-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 24px;
    color: var(--vcd-accent);
    font-size: 0.86rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.15s ease;
}

.vcd-back-to-nav:hover {
    color: var(--vcd-accent-dark);
    text-decoration: underline;
    transform: translateY(-1px);
}

.vcd-section-dark .vcd-back-to-nav {
    color: #67e8f9;
}

.vcd-section-dark .vcd-back-to-nav:hover {
    color: #a5f3fc;
}

/* Floating Back-to-Nav Button */
.vcd-floating-jump-btn {
    position: fixed;
    right: 24px;
    bottom: 28px;
    z-index: 999;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid var(--vcd-rule);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--vcd-ink);
    font-size: 0.86rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.vcd-floating-jump-btn:hover {
    transform: translateY(-2px);
    background: #ffffff;
    border-color: var(--vcd-accent);
    color: var(--vcd-accent-dark);
    box-shadow: 0 12px 28px rgba(15, 118, 110, 0.25);
}

.vcd-section {
    padding: 84px 0;
}

.vcd-section-band {
    border-block: 1px solid var(--vcd-rule);
    background: var(--vcd-paper);
}

.vcd-section-dark {
    background: var(--vcd-night);
    color: var(--vcd-night-text);
}

.vcd-section-head {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(300px, 1.18fr);
    gap: 48px;
    align-items: start;
    margin-bottom: 44px;
}

.vcd-section-title {
    max-width: 16ch;
    margin: 8px 0 0;
    font-size: clamp(2rem, 4vw, 3.45rem);
    font-weight: 760;
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.vcd-section-intro {
    max-width: 68ch;
    margin: 0;
    color: var(--vcd-muted);
    font-size: 1.08rem;
}

.vcd-prologue {
    max-width: 980px;
}

.vcd-prologue > h2 {
    max-width: 18ch;
    margin: 8px 0 38px;
    font-size: clamp(2.1rem, 4.6vw, 4rem);
    font-weight: 760;
    line-height: 1.06;
    letter-spacing: -0.04em;
}

.vcd-prologue-copy {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 5vw, 60px);
}

.vcd-prologue-copy p {
    margin: 0;
    color: var(--vcd-muted);
    font-size: 1.08rem;
}

.vcd-pullquote {
    max-width: 24ch;
    margin: 54px 0 0 auto;
    padding: 0 0 0 24px;
    border-left: 4px solid var(--vcd-accent);
    color: var(--vcd-accent-dark);
    font-size: clamp(1.45rem, 3vw, 2.35rem);
    font-weight: 720;
    line-height: 1.35;
}

.vcd-section-dark .vcd-section-kicker {
    color: #67e8f9;
}

.vcd-section-dark .vcd-section-intro {
    color: var(--vcd-night-muted);
}

.vcd-problem-grid,
.vcd-decision-grid,
.vcd-role-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.vcd-problem-card,
.vcd-decision-card,
.vcd-role-card {
    padding: 26px;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-md);
    background: var(--vcd-paper);
}

.vcd-problem-card span,
.vcd-decision-card span {
    display: block;
    margin-bottom: 28px;
    color: var(--vcd-accent);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.82rem;
    font-weight: 700;
}

.vcd-problem-card h3,
.vcd-decision-card h3,
.vcd-role-card h3 {
    margin: 0 0 12px;
    font-size: 1.28rem;
    font-weight: 730;
    line-height: 1.3;
}

.vcd-problem-card p,
.vcd-decision-card p,
.vcd-role-card p {
    margin: 0;
    color: var(--vcd-muted);
}

.vcd-thesis {
    max-width: 860px;
    margin: 42px auto 0;
    color: var(--vcd-accent-dark);
    font-size: clamp(1.35rem, 2.8vw, 2.15rem);
    font-weight: 720;
    line-height: 1.35;
    text-align: center;
}

.vcd-story {
    display: grid;
    grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
    gap: 54px;
    align-items: center;
}

.vcd-story + .vcd-story {
    margin-top: 88px;
}

.vcd-story-reverse .vcd-story-copy {
    order: 2;
}

.vcd-story-reverse .vcd-artifact {
    order: 1;
}

.vcd-story-index {
    color: var(--vcd-accent);
}

.vcd-story h2,
.vcd-story h3 {
    margin: 12px 0 18px;
    font-size: clamp(1.8rem, 3.2vw, 2.7rem);
    font-weight: 750;
    line-height: 1.15;
    letter-spacing: -0.025em;
}

.vcd-story p {
    color: var(--vcd-muted);
}

.vcd-story-list {
    display: grid;
    gap: 12px;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

.vcd-story-list li {
    position: relative;
    padding-left: 24px;
    color: #3f484f;
}

.vcd-story-list li::before {
    position: absolute;
    top: 0.68em;
    left: 2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--vcd-accent);
    content: "";
}

.vcd-story-callout {
    margin-top: 26px;
    padding: 18px 20px;
    border-left: 4px solid var(--vcd-accent);
    background: var(--vcd-accent-soft);
    color: #274944 !important;
}

.vcd-human-boundary {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1.18fr);
    gap: clamp(34px, 6vw, 76px);
}

.vcd-human-boundary h2 {
    max-width: 13ch;
    margin: 8px 0 0;
    color: #ffffff;
    font-size: clamp(2.2rem, 4.8vw, 4rem);
    font-weight: 760;
    line-height: 1.06;
    letter-spacing: -0.04em;
}

.vcd-human-copy p {
    margin: 0 0 20px;
    color: var(--vcd-night-muted);
    font-size: 1.08rem;
}

.vcd-boundary-quote {
    margin: 36px 0 0;
    padding: 24px 0 0;
    border-top: 1px solid var(--vcd-night-rule);
    color: #ffffff;
    font-size: clamp(1.35rem, 2.8vw, 2rem);
    font-weight: 700;
    line-height: 1.4;
}

.vcd-tech-note {
    grid-column: 1 / -1;
    margin-top: 12px;
    border: 1px solid var(--vcd-night-rule);
    border-radius: var(--vcd-radius-md);
    background: var(--vcd-night-raised);
}

.vcd-tech-note summary {
    padding: 20px 24px;
    color: #ffffff;
    cursor: pointer;
    font-weight: 700;
}

.vcd-tech-note summary::marker {
    color: #67e8f9;
}

.vcd-tech-note-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(420px, 1.28fr);
    gap: 36px;
    padding: 8px 24px 26px;
    align-items: start;
}

.vcd-tech-note-grid p {
    color: var(--vcd-night-muted);
}

.vcd-tech-note .vcd-artifact figcaption {
    color: var(--vcd-night-muted);
}

.vcd-impact-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin-top: 54px;
    overflow: hidden;
    border: 1px solid var(--vcd-night-rule);
    border-radius: var(--vcd-radius-md);
    background: var(--vcd-night-rule);
}

.vcd-impact-item {
    min-height: 150px;
    padding: 24px;
    background: var(--vcd-night-raised);
}

.vcd-impact-item strong {
    display: block;
    color: #ffffff;
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.vcd-impact-item span {
    display: block;
    margin-top: 14px;
    color: var(--vcd-night-muted);
    line-height: 1.45;
}

.vcd-architecture-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.22fr) minmax(300px, 0.78fr);
    gap: 42px;
    align-items: start;
}

.vcd-system-list {
    display: grid;
    gap: 16px;
}

.vcd-system-item {
    padding: 22px;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-md);
    background: var(--vcd-paper);
}

.vcd-system-label {
    color: var(--vcd-accent);
}

.vcd-system-item h3 {
    margin: 8px 0 8px;
    font-size: 1.18rem;
}

.vcd-system-item p {
    margin: 0;
    color: var(--vcd-muted);
}

.vcd-decision-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.vcd-decision-card {
    background: #f9faf8;
}

.vcd-decision-card span {
    margin-bottom: 18px;
}

.vcd-truth-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.75fr) minmax(320px, 1.25fr);
    gap: 44px;
    margin-top: 50px;
    padding: 34px;
    border-left: 5px solid var(--vcd-amber);
    background: var(--vcd-amber-soft);
}

.vcd-truth-panel h3 {
    margin: 0;
    font-size: 1.75rem;
    line-height: 1.25;
}

.vcd-truth-panel p,
.vcd-truth-panel ul {
    margin: 0;
    color: #5f5141;
}

.vcd-truth-panel ul {
    padding-left: 1.2rem;
}

.vcd-evidence-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-md);
}

.vcd-evidence-table {
    width: 100%;
    min-width: 720px;
    border-collapse: collapse;
    background: var(--vcd-paper);
}

.vcd-evidence-table th,
.vcd-evidence-table td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--vcd-rule);
    text-align: left;
    vertical-align: top;
}

.vcd-evidence-table th {
    background: #efede7;
    color: #3a4248;
    font-size: 0.86rem;
    letter-spacing: 0.03em;
}

.vcd-evidence-table tr:last-child td {
    border-bottom: 0;
}

.vcd-evidence-table td:first-child {
    font-family: "Cascadia Mono", Consolas, monospace;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.vcd-evidence-table td:last-child {
    color: var(--vcd-muted);
}

.vcd-role-card {
    border-top: 4px solid var(--vcd-accent);
}

.vcd-closing {
    padding: 72px 0;
    background: var(--vcd-night);
    color: var(--vcd-night-text);
}

.vcd-closing-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 42px;
    align-items: center;
}

.vcd-closing h2 {
    max-width: 20ch;
    margin: 8px 0 12px;
    font-size: clamp(2rem, 4vw, 3.45rem);
    line-height: 1.08;
}

.vcd-closing p {
    max-width: 62ch;
    margin: 0;
    color: var(--vcd-night-muted);
}

.vcd-closing .vcd-button-primary {
    border-color: #ffffff;
    background: #ffffff;
    color: var(--vcd-night);
}

.vcd-closing .vcd-button-primary:hover {
    border-color: #67e8f9;
    background: #67e8f9;
    color: var(--vcd-night);
}

.vcd-closing .vcd-button-secondary {
    border-color: #526578;
    color: var(--vcd-night-text);
}

.vcd-closing .vcd-button-secondary:hover {
    border-color: #67e8f9;
    background: transparent;
    color: #67e8f9;
}

.vcd-footer {
    padding: 24px 0;
    border-top: 1px solid #263543;
    background: var(--vcd-night);
    color: var(--vcd-night-muted);
}

.vcd-footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.vcd-footer p {
    margin: 0;
}

.vcd-footer a {
    color: var(--vcd-night-text);
}

body.lightbox-open {
    overflow: hidden;
}

.vcd-lightbox {
    width: min(94vw, 1500px);
    max-width: none;
    height: min(92vh, 980px);
    max-height: none;
    padding: 0;
    overflow: hidden;
    border: 1px solid #405466;
    border-radius: 12px;
    background: var(--vcd-night);
    color: var(--vcd-night-text);
}

.vcd-lightbox::backdrop {
    background: rgba(5, 9, 13, 0.86);
}

.vcd-lightbox-figure {
    display: grid;
    width: 100%;
    height: 100%;
    grid-template-rows: minmax(0, 1fr) auto;
    margin: 0;
    padding: 52px 24px 20px;
}

.vcd-lightbox-figure img {
    width: 100%;
    height: 100%;
    min-height: 0;
    object-fit: contain;
}

.vcd-lightbox-figure figcaption {
    padding-top: 14px;
    color: var(--vcd-night-muted);
    font-size: 0.9rem;
    text-align: center;
}

.vcd-lightbox-close {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    width: 40px;
    height: 40px;
    border: 1px solid #526578;
    border-radius: 50%;
    background: #182532;
    color: #ffffff;
    font-size: 1.35rem;
}

.vcd-lightbox-close:hover,
.vcd-lightbox-close:focus-visible {
    border-color: #67e8f9;
    color: #67e8f9;
}

@media (max-width: 991px) {
    .vcd-hero-grid,
    .vcd-section-head,
    .vcd-story,
    .vcd-architecture-grid,
    .vcd-truth-panel,
    .vcd-closing-grid,
    .vcd-prologue-copy,
    .vcd-human-boundary,
    .vcd-tech-note-grid {
        grid-template-columns: 1fr;
    }

    .vcd-proof-rail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .vcd-proof-card {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .vcd-section-head {
        gap: 20px;
    }

    .vcd-section-title {
        max-width: 22ch;
    }

    .vcd-story-reverse .vcd-story-copy,
    .vcd-story-reverse .vcd-artifact {
        order: initial;
    }

    .vcd-tech-note {
        grid-column: auto;
    }

    .vcd-problem-grid,
    .vcd-role-grid {
        grid-template-columns: 1fr;
    }

    .vcd-impact-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .vcd-closing-grid {
        gap: 20px;
    }
}

@media (max-width: 680px) {
    .vcd-container {
        width: min(100% - 28px, 1160px);
    }

    .vcd-hero {
        padding: 58px 0 48px;
    }

    .vcd-title {
        font-size: clamp(2.35rem, 13vw, 3.65rem);
    }

    .vcd-hero-prompt {
        padding: 24px;
    }

    .vcd-proof-rail,
    .vcd-decision-grid,
    .vcd-impact-strip {
        grid-template-columns: 1fr;
    }

    .vcd-section {
        padding: 58px 0;
    }

    .vcd-story {
        gap: 28px;
    }

    .vcd-story + .vcd-story {
        margin-top: 64px;
    }

    .vcd-prologue > h2 {
        margin-bottom: 28px;
    }

    .vcd-pullquote {
        margin-top: 38px;
    }

    .vcd-tech-note-grid {
        gap: 24px;
        padding: 6px 18px 20px;
    }

    .vcd-problem-card,
    .vcd-decision-card,
    .vcd-role-card,
    .vcd-truth-panel {
        padding: 22px;
    }

    .vcd-artifact-link::after {
        right: 10px;
        bottom: 10px;
        padding: 6px 9px;
    }

    .vcd-footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .vcd-lightbox {
        width: 96vw;
        height: 90vh;
    }

    .vcd-lightbox-figure {
        padding: 54px 12px 16px;
    }
}

/* Feature Badges & Visual Enhancements */
.vcd-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    border-radius: 4px;
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.2;
    vertical-align: middle;
    margin-left: 6px;
}

.vcd-badge-new {
    background: #e11d48;
    color: #ffffff;
}

.vcd-badge-roi {
    background: #059669;
    color: #ffffff;
}

.vcd-badge-count {
    background: #0284c7;
    color: #ffffff;
}

.vcd-badge-claude {
    background: #d97706;
    color: #ffffff;
}

.vcd-feature-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.vcd-feature-kpi-item {
    padding: 16px 20px;
    border: 1px solid var(--vcd-rule);
    border-radius: var(--vcd-radius-md);
    background: rgba(255, 255, 255, 0.9);
}

.vcd-feature-kpi-item strong {
    display: block;
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 1.65rem;
    color: var(--vcd-accent);
    line-height: 1.1;
    margin-bottom: 4px;
}

.vcd-feature-kpi-item span {
    font-size: 0.88rem;
    color: var(--vcd-muted);
}

.vcd-story-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0 0;
}

.vcd-artifact .vcd-story-tech-tags {
    margin-top: 14px;
    padding-top: 10px;
    border-top: 1px dashed var(--vcd-rule);
}

.vcd-section-dark .vcd-artifact .vcd-story-tech-tags {
    border-top-color: var(--vcd-night-rule);
}

.vcd-story-tech-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border: 1px solid var(--vcd-rule);
    border-radius: 999px;
    background: #ffffff;
    color: var(--vcd-ink);
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.76rem;
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.vcd-section-dark .vcd-story-tech-tag {
    border-color: var(--vcd-night-rule);
    background: var(--vcd-night-raised);
    color: var(--vcd-night-muted);
    box-shadow: none;
}

/* ==========================================================================
   Enterprise Platform Showcase Extensions
   ========================================================================== */

/* 1. System Telemetry Ribbon */
.vcd-telemetry-ribbon {
    border-bottom: 1px solid var(--vcd-rule);
    background: #111827;
    color: #e5e7eb;
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.8rem;
    padding: 8px 0;
}

.vcd-ribbon-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.vcd-ribbon-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: #34d399;
}

.vcd-status-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: vcd-pulse 2s infinite;
}

@keyframes vcd-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.vcd-ribbon-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    color: #9ca3af;
}

.vcd-ribbon-meta span strong {
    color: #f3f4f6;
}

/* 2. Architecture Blueprint Section */
.vcd-blueprint-section {
    padding: 72px 0;
    background: #0b1118;
    color: #e2e8f0;
    border-bottom: 1px solid #1e293b;
    position: relative;
}

.vcd-blueprint-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 48px;
}

.vcd-blueprint-header h2 {
    color: #ffffff;
    font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 12px 0 16px;
}

.vcd-blueprint-header p {
    color: #94a3b8;
    font-size: 1.05rem;
    line-height: 1.6;
}

.vcd-blueprint-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
}

@media (max-width: 992px) {
    .vcd-blueprint-grid {
        grid-template-columns: 1fr;
    }
}

.vcd-blueprint-card {
    background: #111b27;
    border: 1px solid #1e2e42;
    border-radius: var(--vcd-radius-md);
    padding: 26px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.vcd-blueprint-card:hover {
    transform: translateY(-3px);
    border-color: #38bdf8;
}

.vcd-blueprint-step {
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.76rem;
    font-weight: 700;
    color: #38bdf8;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.vcd-blueprint-card h3 {
    color: #f8fafc;
    font-size: 1.28rem;
    font-weight: 750;
    margin: 0 0 12px;
}

.vcd-blueprint-card p {
    color: #94a3b8;
    font-size: 0.92rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.vcd-blueprint-specs {
    list-style: none;
    padding: 0;
    margin: auto 0 0;
    border-top: 1px dashed #243447;
    padding-top: 14px;
}

.vcd-blueprint-specs li {
    font-size: 0.84rem;
    color: #cbd5e1;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 8px;
}

.vcd-blueprint-specs li code {
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.78rem;
    background: #0d1520;
    padding: 2px 6px;
    border-radius: 4px;
    color: #67e8f9;
    border: 1px solid #1e2e42;
}

/* 3. Enterprise Impact Triad Callout */
.vcd-triad-box {
    margin: 20px 0;
    padding: 16px 20px;
    border-left: 3px solid #0f766e;
    background: rgba(15, 118, 110, 0.06);
    border-radius: 0 var(--vcd-radius-sm) var(--vcd-radius-sm) 0;
}

.vcd-section-dark .vcd-triad-box {
    border-left-color: #38bdf8;
    background: rgba(56, 189, 248, 0.08);
}

.vcd-triad-item {
    font-size: 0.92rem;
    margin-bottom: 8px;
    line-height: 1.55;
}

.vcd-triad-item:last-child {
    margin-bottom: 0;
}

.vcd-triad-label {
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 6px;
    display: inline-block;
}

.vcd-triad-label-pain {
    background: #fee2e2;
    color: #991b1b;
}

.vcd-triad-label-tech {
    background: #e0f2fe;
    color: #0369a1;
}

.vcd-triad-label-gain {
    background: #dcfce7;
    color: #166534;
}

.vcd-section-dark .vcd-triad-label-pain {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.vcd-section-dark .vcd-triad-label-tech {
    background: rgba(56, 189, 248, 0.2);
    color: #7dd3fc;
}

.vcd-section-dark .vcd-triad-label-gain {
    background: rgba(34, 197, 94, 0.2);
    color: #86efac;
}

/* 4. Enterprise Governance Matrix Table */
.vcd-governance-table-wrap {
    overflow-x: auto;
    margin: 32px 0;
    border-radius: var(--vcd-radius-md);
    border: 1px solid var(--vcd-night-rule);
    background: var(--vcd-night-raised);
}

.vcd-governance-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
    min-width: 600px;
}

.vcd-governance-table th {
    background: #0f1823;
    color: #f8fafc;
    padding: 14px 18px;
    font-family: "Cascadia Mono", Consolas, monospace;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--vcd-night-rule);
}

.vcd-governance-table td {
    padding: 14px 18px;
    border-bottom: 1px solid #1a2938;
    color: #cbd5e1;
    vertical-align: middle;
}

.vcd-governance-table tr:last-child td {
    border-bottom: none;
}

.vcd-governance-table td strong {
    color: #ffffff;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .vcd-button {
        transition: none;
    }
}