/**
 * Document vocabulary — element styles + playground chrome helpers
 * Lab markup lives on page-playground.php (slug: playground).
 * Playground-only (Phase 1): doc-stack base + doc-ticker family live in base.css.
 * Validated: doc-stack (chrome), doc-binder
 * Semi: doc-scan, doc-peek, doc-status
 * Showcase round: beacon, command, pipeline, signstroke, vault, ring, layers, glass
 */

.doc-vocab-mock {
    --dvm-cut: 0.9rem;
    --dvm-fill: var(--color-bg-alt);
    --dvm-fill-tint: var(--color-card-bg-alt);
    --dvm-border: color-mix(in srgb, var(--color-border-alt) 35%, transparent);
    --dvm-line: color-mix(in srgb, var(--color-border-alt) 18%, transparent);
    --dvm-ink: var(--color-text-alt);
    --dvm-muted: var(--color-muted-alt);
    --dvm-dim: var(--color-dim-alt);
    --dvm-grid-y: 2.8rem;
    --dvm-grid-x: 2.8rem;
    --dvm-navy: var(--color-bg);
    --dvm-surface: var(--color-surface);
    --dvm-green: var(--color-accent);
    background: var(--color-bg-alt);
    color: var(--dvm-ink);
}

.doc-vocab-mock__banner {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.8rem 1.6rem;
    margin-bottom: var(--gap-md);
    padding-bottom: var(--gap-sm);
    border-bottom: 1px solid var(--color-divider-subtle);
}

.doc-vocab-mock__banner-tag {
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-btn-text);
    background: var(--color-accent);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius);
}

.doc-vocab-mock__banner-note {
    margin: 0;
    font-size: var(--text-sm);
    color: var(--dvm-muted);
}

.doc-vocab-mock__title {
    margin: 0 0 0.6rem;
    font-size: var(--text-h3);
    font-weight: var(--weight-regular);
    letter-spacing: -0.01em;
}

.doc-vocab-mock__subtitle {
    margin: 0 0 var(--gap-md);
    font-size: var(--text-sm);
    color: var(--dvm-muted);
    max-width: 68ch;
}

.doc-vocab-mock__section-label {
    margin: var(--gap-md) 0 var(--gap-sm);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.doc-vocab-mock__section-label--semi {
    color: var(--dvm-muted);
}

.doc-vocab-mock__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gap-md);
}

.doc-vocab-mock__item {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    min-width: 0;
}

.doc-vocab-mock__item--wide {
    grid-column: 1 / -1;
}

.doc-vocab-mock__label {
    margin: 0;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dvm-dim);
}

.doc-vocab-mock__label code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1.1rem;
    letter-spacing: 0;
    text-transform: none;
    font-weight: var(--weight-medium);
    color: var(--dvm-muted);
}

.doc-vocab-mock .doc-corner-cut {
    --doc-corner-cut: var(--dvm-cut);
    --doc-border-color: var(--dvm-border);
}

.doc-vocab-mock .doc-corner-cut > * {
    position: relative;
    z-index: 1;
}

.doc-pad-grid {
    background-color: var(--dvm-fill);
    background-image:
        linear-gradient(to right, var(--dvm-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--dvm-line) 1px, transparent 1px);
    background-size: var(--dvm-grid-x) var(--dvm-grid-y);
}

/* VALIDATED — doc-stack base geometry moved to base.css (Phase 1) */

.doc-stack__count {
    margin: 0;
    font-size: clamp(3.2rem, 5vw, 4.8rem);
    font-weight: var(--weight-regular);
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--dvm-ink);
}

.doc-stack__label {
    margin: 0.8rem 0 0;
    font-size: var(--text-sm);
    color: var(--dvm-muted);
}

.doc-stack--breathe.is-playing .doc-stack__sheet--back {
    animation: dvm-stack-breathe-back 4.5s ease-in-out infinite;
}

.doc-stack--breathe.is-playing .doc-stack__sheet--mid {
    animation: dvm-stack-breathe-mid 4.5s ease-in-out infinite;
}

.doc-stack--breathe.is-playing .doc-stack__sheet--front {
    animation: dvm-stack-breathe-front 4.5s ease-in-out infinite;
}

@keyframes dvm-stack-breathe-back {
    0%, 100% { transform: translate(1.2rem, -1.2rem); }
    50% { transform: translate(1.45rem, -1.45rem); }
}

@keyframes dvm-stack-breathe-mid {
    0%, 100% { transform: translate(0.6rem, -0.6rem); }
    50% { transform: translate(0.75rem, -0.85rem); }
}

@keyframes dvm-stack-breathe-front {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(0, -0.25rem); }
}

.doc-binder {
    --doc-fill: transparent;
    display: grid;
    grid-template-columns: 4.4rem minmax(0, 1fr);
    min-height: 18rem;
}

.doc-binder__spine {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    color: var(--color-text);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 1.2rem 0;
}

.doc-binder__pages {
    --dvm-line: color-mix(in srgb, var(--color-border-alt) 8%, transparent);
    position: relative;
    z-index: 1;
    padding: 2rem 2.2rem;
    min-height: 18rem;
    background-color: var(--dvm-fill);
}

.doc-binder__pages h4 {
    margin: 0 0 1.2rem;
    font-size: var(--text-h4);
    font-weight: var(--weight-medium);
}

.doc-binder__pages p {
    margin: 0;
    font-size: var(--text-sm);
    color: var(--dvm-muted);
    line-height: 1.55;
    max-width: 36ch;
}

/* SEMI-VALIDATED */

.doc-ico {
    width: 1.4rem;
    height: 1.4rem;
    flex-shrink: 0;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.doc-ico--lg {
    width: 2rem;
    height: 2rem;
}

.doc-scan {
    --doc-fill: var(--dvm-fill);
    position: relative;
    min-height: 22rem;
    padding: 2.4rem;
    overflow: hidden;
}

.doc-scan__title {
    margin: 0 0 0.6rem;
    font-size: var(--text-h4);
    font-weight: var(--weight-medium);
}

.doc-scan__sub {
    margin: 0 0 2.4rem;
    font-size: var(--text-sm);
    color: var(--dvm-muted);
    max-width: 32ch;
}

.doc-scan__body {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.doc-scan__bar {
    height: 0.7rem;
    border-radius: 0.2rem;
    background: color-mix(in srgb, var(--color-border-alt) 14%, transparent);
    transform-origin: left center;
    opacity: 0.45;
}

.doc-scan__bar:nth-child(1) { width: 88%; }
.doc-scan__bar:nth-child(2) { width: 72%; }
.doc-scan__bar:nth-child(3) { width: 94%; }
.doc-scan__bar:nth-child(4) { width: 61%; }
.doc-scan__bar:nth-child(5) { width: 80%; }

.doc-scan__beam {
    position: absolute;
    left: 0;
    right: 0;
    top: -20%;
    height: 4.8rem;
    pointer-events: none;
    z-index: 2;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        color-mix(in srgb, var(--dvm-green) 0%, transparent) 30%,
        color-mix(in srgb, var(--dvm-green) 22%, transparent) 50%,
        color-mix(in srgb, var(--dvm-green) 0%, transparent) 70%,
        transparent 100%
    );
    border-bottom: 1px solid color-mix(in srgb, var(--dvm-green) 55%, transparent);
    opacity: 0;
}

.doc-scan.is-playing .doc-scan__beam {
    animation: dvm-scan-beam 4.8s ease-in-out infinite;
}

.doc-scan.is-playing .doc-scan__bar {
    animation: dvm-scan-lit 4.8s ease-in-out infinite;
}

.doc-scan.is-playing .doc-scan__bar:nth-child(1) { animation-delay: 0.35s; }
.doc-scan.is-playing .doc-scan__bar:nth-child(2) { animation-delay: 0.7s; }
.doc-scan.is-playing .doc-scan__bar:nth-child(3) { animation-delay: 1.05s; }
.doc-scan.is-playing .doc-scan__bar:nth-child(4) { animation-delay: 1.4s; }
.doc-scan.is-playing .doc-scan__bar:nth-child(5) { animation-delay: 1.75s; }

@keyframes dvm-scan-beam {
    0% { top: -15%; opacity: 0; }
    12% { opacity: 1; }
    88% { opacity: 1; }
    100% { top: 95%; opacity: 0; }
}

@keyframes dvm-scan-lit {
    0%, 18% {
        background: color-mix(in srgb, var(--color-border-alt) 14%, transparent);
        opacity: 0.45;
    }
    28%, 70% {
        background: color-mix(in srgb, var(--dvm-green) 35%, var(--dvm-fill-tint));
        opacity: 1;
    }
    85%, 100% {
        background: color-mix(in srgb, var(--color-border-alt) 18%, transparent);
        opacity: 0.55;
    }
}

/* doc-ticker family moved to base.css (Phase 1) */

.doc-peek {
    position: relative;
    min-height: 22rem;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 2rem 2rem 0;
    border-radius: var(--radius);
    background: var(--dvm-fill-tint);
    overflow: hidden;
}

.doc-peek__folder {
    position: relative;
    width: min(100%, 30rem);
    height: 16rem;
    z-index: 2;
}

.doc-peek__back {
    position: absolute;
    inset: 1.8rem 0.4rem 0;
    background: color-mix(in srgb, var(--dvm-navy) 16%, var(--dvm-fill));
    border: 1px solid var(--dvm-border);
    border-radius: 0.7rem 0.7rem 0 0;
}

.doc-peek__tab {
    position: absolute;
    top: 0;
    left: 1rem;
    width: 8.4rem;
    height: 2rem;
    background: color-mix(in srgb, var(--dvm-green) 10%, var(--dvm-fill-tint));
    border: 1px solid var(--dvm-border);
    border-bottom: none;
    border-radius: 0.55rem 0.55rem 0 0;
    clip-path: polygon(0 0, 78% 0, 100% 100%, 0 100%);
}

.doc-peek__front {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 8.8rem;
    background: linear-gradient(
        180deg,
        var(--dvm-fill) 0%,
        color-mix(in srgb, var(--dvm-fill-tint) 70%, var(--dvm-fill)) 100%
    );
    border: 1px solid var(--dvm-border);
    border-radius: 0.55rem 0.55rem 0 0;
    z-index: 3;
    box-shadow: 0 -0.4rem 1.2rem color-mix(in srgb, var(--dvm-navy) 8%, transparent);
}

.doc-peek__sheets {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.doc-peek__sheet {
    --doc-corner-cut: 0.7rem;
    --doc-fill: var(--dvm-fill);
    position: absolute;
    left: 10%;
    right: 10%;
    bottom: 6.2rem;
    height: 11.2rem;
    z-index: 1;
    padding: 1.4rem 1.6rem;
    box-shadow: 0 0.4rem 1.2rem color-mix(in srgb, var(--dvm-navy) 10%, transparent);
}

.doc-peek__sheet--a {
    left: 14%;
    right: 8%;
    --doc-fill: color-mix(in srgb, var(--dvm-fill-tint) 55%, var(--dvm-fill));
    z-index: 1;
}

.doc-peek__sheet--b {
    left: 11%;
    right: 11%;
    --doc-fill: var(--dvm-fill);
    z-index: 2;
}

.doc-peek__sheet--c {
    left: 8%;
    right: 14%;
    --doc-fill: var(--dvm-fill);
    z-index: 3;
}

.doc-peek__brand {
    position: relative;
    z-index: 1;
    margin: 0 0 1.2rem;
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    letter-spacing: 0.04em;
    line-height: 1.2;
    color: var(--dvm-ink);
}

.doc-peek__sheet-line {
    display: block;
    height: 1px;
    margin-bottom: 0.9rem;
    background: color-mix(in srgb, var(--color-border-alt) 28%, transparent);
}

.doc-peek__sheet-line:nth-of-type(1) { width: 78%; }
.doc-peek__sheet-line:nth-of-type(2) { width: 92%; }
.doc-peek__sheet-line:nth-of-type(3) { width: 64%; }

.doc-peek__mark {
    position: absolute;
    right: var(--gap-xxs);
    bottom: var(--gap-xxs);
    z-index: 2;
    width: var(--gap-xxs);
    height: var(--gap-xxs);
    background-color: var(--dvm-green);
}

.doc-peek.is-playing .doc-peek__sheet--a {
    animation: dvm-peek-stack-a 5.2s ease-in-out infinite;
}

.doc-peek.is-playing .doc-peek__sheet--b {
    animation: dvm-peek-stack-b 5.2s ease-in-out infinite;
}

.doc-peek.is-playing .doc-peek__sheet--c {
    animation: dvm-peek-stack-c 5.2s ease-in-out infinite;
}

@keyframes dvm-peek-stack-a {
    0%, 100% { transform: translateY(2.2rem) rotate(-1.2deg); opacity: 0.75; }
    40%, 52% { transform: translateY(-0.4rem) rotate(-2deg); opacity: 0.95; }
}

@keyframes dvm-peek-stack-b {
    0%, 100% { transform: translateY(1.8rem) rotate(0.6deg); opacity: 0.85; }
    44%, 56% { transform: translateY(-1.6rem) rotate(1.2deg); opacity: 1; }
}

@keyframes dvm-peek-stack-c {
    0%, 100% {
        transform: translateY(1.4rem) rotate(0deg);
        opacity: 0.9;
        box-shadow: 0 0.2rem 0.6rem color-mix(in srgb, var(--dvm-navy) 8%, transparent);
    }
    48%, 60% {
        transform: translateY(-2.8rem) rotate(-1.5deg);
        opacity: 1;
        box-shadow: 0 0.8rem 1.8rem color-mix(in srgb, var(--dvm-navy) 18%, transparent);
    }
}

.doc-status {
    --doc-fill: var(--dvm-fill);
    min-height: 22rem;
    padding: 2.4rem;
}

.doc-status__head {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 2.4rem;
    color: var(--dvm-ink);
}

.doc-status__head > .doc-ico {
    color: var(--dvm-green);
}

.doc-status__title {
    margin: 0 0 0.35rem;
    font-size: var(--text-h4);
    font-weight: var(--weight-medium);
}

.doc-status__meta {
    margin: 0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1.15rem;
    color: var(--dvm-muted);
}

.doc-status__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.doc-status__row {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 1.1rem 1.2rem;
    border-radius: 0.5rem;
    border: 1px solid color-mix(in srgb, var(--color-border-alt) 22%, transparent);
    font-size: var(--text-sm);
    color: var(--dvm-muted);
    background: color-mix(in srgb, var(--dvm-fill-tint) 55%, transparent);
}

.doc-status__row--ok {
    color: var(--dvm-ink);
}

.doc-status__row--ok .doc-ico {
    color: var(--dvm-green);
}

.doc-status__row--wait .doc-ico {
    color: #c9a227;
}

.doc-status.is-playing .doc-status__row--wait {
    animation: dvm-status-wait 3.2s ease-in-out infinite;
}

@keyframes dvm-status-wait {
    0%, 100% { border-color: color-mix(in srgb, var(--color-border-alt) 22%, transparent); }
    50% { border-color: color-mix(in srgb, #c9a227 45%, transparent); background: color-mix(in srgb, #c9a227 6%, transparent); }
}

/* ════════════════════════════════════════
   SHOWCASE ROUND — for Twitter
   Classy, modern, institutional RLD.
   Navy var(--dvm-navy) #1B2D43 · Green var(--dvm-green) #2BD698
   ════════════════════════════════════════ */

/* A. doc-beacon */
.doc-beacon {
    position: relative;
    min-height: 24rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap-md);
    padding: 3.2rem clamp(2.4rem, 4vw, 4rem);
    border-radius: var(--radius);
    overflow: hidden;
    background: linear-gradient(135deg, var(--dvm-navy) 0%, color-mix(in srgb, var(--dvm-navy) 65%, var(--dvm-surface)) 100%);
    color: var(--color-text);
}

.doc-beacon__glow {
    position: absolute;
    top: 45%;
    left: 30%;
    width: 34rem;
    height: 34rem;
    background: radial-gradient(circle, color-mix(in srgb, var(--dvm-green) 30%, transparent) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
}

.doc-beacon__main {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
    min-width: 0;
}

.doc-beacon__live {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
}

.doc-beacon__dot {
    position: relative;
    width: 0.7rem;
    height: 0.7rem;
    border-radius: 50%;
    background: var(--dvm-green);
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--dvm-green) 55%, transparent);
}

.doc-beacon.is-playing .doc-beacon__dot {
    animation: dvm-beacon-pulse 2.4s ease-out infinite;
}

.doc-beacon__live-text {
    margin: 0;
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.doc-beacon__metric {
    position: relative;
}

.doc-beacon__value {
    margin: 0;
    font-size: clamp(4.8rem, 7vw, 7.2rem);
    font-weight: var(--weight-regular);
    letter-spacing: -0.03em;
    line-height: 1;
    background: linear-gradient(100deg, #fff 0%, #fff 42%, var(--dvm-green) 50%, #fff 58%, #fff 100%);
    background-size: 220% 100%;
    background-position: 100% 0;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.doc-beacon.is-playing .doc-beacon__value {
    animation: dvm-beacon-shimmer 5s ease-in-out infinite;
}

.doc-beacon__label {
    margin: 0.4rem 0 0;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.55);
}

.doc-beacon__chips {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex-shrink: 0;
}

.doc-beacon__chip {
    display: grid;
    place-items: center;
    width: 5.2rem;
    height: 5.2rem;
    border-radius: 0.8rem;
    border: 1px solid color-mix(in srgb, #fff 12%, transparent);
    background: color-mix(in srgb, var(--dvm-surface) 65%, transparent);
    color: rgba(255, 255, 255, 0.85);
}

.doc-beacon__chip .doc-ico {
    width: 1.8rem;
    height: 1.8rem;
}

.doc-beacon__chip--accent {
    color: var(--dvm-green);
    border-color: color-mix(in srgb, var(--dvm-green) 35%, transparent);
}

.doc-beacon.is-playing .doc-beacon__chip {
    animation: dvm-beacon-float 4.4s ease-in-out infinite;
}

.doc-beacon.is-playing .doc-beacon__chip:nth-child(2) { animation-delay: 0.3s; }
.doc-beacon.is-playing .doc-beacon__chip:nth-child(3) { animation-delay: 0.6s; }
.doc-beacon.is-playing .doc-beacon__chip:nth-child(4) { animation-delay: 0.9s; }

@keyframes dvm-beacon-pulse {
    0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--dvm-green) 55%, transparent); }
    70% { box-shadow: 0 0 0 0.8rem color-mix(in srgb, var(--dvm-green) 0%, transparent); }
    100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--dvm-green) 0%, transparent); }
}

@keyframes dvm-beacon-shimmer {
    0%, 15% { background-position: 100% 0; }
    55%, 100% { background-position: -40% 0; }
}

@keyframes dvm-beacon-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-0.5rem); }
}

/* B. doc-command */
.doc-command {
    --doc-fill: var(--dvm-fill);
    position: relative;
    min-height: 22rem;
    border-radius: var(--radius);
    border: 1px solid var(--dvm-border);
    background: var(--dvm-fill);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.doc-command__chrome {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 1.6rem;
    background: var(--dvm-navy);
    color: var(--color-text);
    border-bottom: 1px solid color-mix(in srgb, #fff 8%, transparent);
}

.doc-command__chrome .doc-ico {
    color: rgba(255, 255, 255, 0.4);
}

.doc-command__hint {
    margin: 0;
    flex: 1;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1.3rem;
    letter-spacing: 0.01em;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-command__hint kbd {
    font: inherit;
    color: rgba(255, 255, 255, 0.78);
}

.doc-command__caret {
    display: inline-block;
    width: 0.5rem;
    height: 1.3em;
    margin-left: 0.15rem;
    vertical-align: text-bottom;
    background: var(--dvm-green);
}

.doc-command.is-playing .doc-command__caret {
    animation: dvm-command-caret 1.1s steps(1) infinite;
}

.doc-command__results {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.8rem;
    flex: 1;
}

.doc-command__row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-radius: 0.5rem;
    opacity: 0;
    transform: translateY(0.5rem);
}

.doc-command__row .doc-ico {
    color: var(--dvm-dim);
}

.doc-command__name {
    flex: 1;
    min-width: 0;
    font-size: var(--text-sm);
    color: var(--dvm-ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-command__pill {
    flex-shrink: 0;
    font-size: 1.05rem;
    font-weight: var(--weight-semibold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.7rem;
    border-radius: 0.3rem;
}

.doc-command__pill--ok {
    color: var(--dvm-green);
    background: color-mix(in srgb, var(--dvm-green) 12%, transparent);
}

.doc-command__pill--wait {
    color: #a9791b;
    background: color-mix(in srgb, #c9a227 16%, transparent);
}

.doc-command.is-playing .doc-command__row {
    animation: dvm-command-row 6s ease-in-out infinite;
}

.doc-command.is-playing .doc-command__row:nth-child(1) { animation-delay: 0s; }
.doc-command.is-playing .doc-command__row:nth-child(2) { animation-delay: 0.25s; }
.doc-command.is-playing .doc-command__row:nth-child(3) { animation-delay: 0.5s; }

@keyframes dvm-command-caret {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

@keyframes dvm-command-row {
    0% { opacity: 0; transform: translateY(0.5rem); background: transparent; }
    10%, 85% { opacity: 1; transform: translateY(0); background: color-mix(in srgb, var(--dvm-fill-tint) 55%, transparent); }
    95%, 100% { opacity: 0; transform: translateY(-0.3rem); background: transparent; }
}

/* C. doc-pipeline */
.doc-pipeline {
    position: relative;
    min-height: 22rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.4rem;
    border-radius: var(--radius);
    background: var(--dvm-fill);
}

.doc-pipeline__track {
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 46rem;
}

.doc-pipeline__node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
    flex-shrink: 0;
}

.doc-pipeline__circle {
    position: relative;
    display: grid;
    place-items: center;
    width: 5.2rem;
    height: 5.2rem;
    border-radius: 50%;
    border: 1.5px solid var(--dvm-border);
    background: var(--dvm-fill-tint);
    color: var(--dvm-muted);
}

.doc-pipeline__node--active .doc-pipeline__circle {
    border-color: var(--dvm-green);
    color: var(--dvm-green);
    background: color-mix(in srgb, var(--dvm-green) 8%, var(--dvm-fill-tint));
    box-shadow: 0 0 0 0.35rem color-mix(in srgb, var(--dvm-green) 16%, transparent);
}

.doc-pipeline.is-playing .doc-pipeline__node--active .doc-pipeline__circle {
    animation: dvm-pipeline-glow 2.4s ease-in-out infinite;
}

.doc-pipeline__label {
    margin: 0;
    font-size: var(--text-xs);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dvm-dim);
    white-space: nowrap;
}

.doc-pipeline__node--active .doc-pipeline__label {
    color: var(--dvm-ink);
}

.doc-pipeline__connector {
    position: relative;
    flex: 1;
    height: 1px;
    margin: 0 -0.2rem 2.4rem;
    background: var(--dvm-border);
}

.doc-pipeline__pulse {
    position: absolute;
    top: 50%;
    left: 0;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    background: var(--dvm-green);
    transform: translate(-50%, -50%);
    opacity: 0;
    box-shadow: 0 0 0.7rem color-mix(in srgb, var(--dvm-green) 50%, transparent);
}

.doc-pipeline.is-playing .doc-pipeline__pulse {
    animation: dvm-pipeline-pulse 6s ease-in-out infinite;
}

.doc-pipeline__track > .doc-pipeline__connector:nth-child(2) .doc-pipeline__pulse { animation-delay: 0s; }
.doc-pipeline__track > .doc-pipeline__connector:nth-child(4) .doc-pipeline__pulse { animation-delay: 1.6s; }
.doc-pipeline__track > .doc-pipeline__connector:nth-child(6) .doc-pipeline__pulse { animation-delay: 3.2s; }

@keyframes dvm-pipeline-pulse {
    0% { left: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}

@keyframes dvm-pipeline-pulse-v {
    0% { top: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

@keyframes dvm-pipeline-glow {
    0%, 100% { box-shadow: 0 0 0 0.35rem color-mix(in srgb, var(--dvm-green) 16%, transparent); }
    50% { box-shadow: 0 0 0 0.55rem color-mix(in srgb, var(--dvm-green) 26%, transparent); }
}

/* D. doc-signstroke */
.doc-signstroke {
    --doc-fill: var(--dvm-fill);
    position: relative;
    min-height: 22rem;
    padding: 2.6rem 2.6rem 2.8rem;
    display: flex;
    flex-direction: column;
}

.doc-signstroke__eyebrow {
    margin: 0 0 0.6rem;
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dvm-dim);
}

.doc-signstroke__title {
    margin: 0 0 2rem;
    font-size: var(--text-h4);
    font-weight: var(--weight-medium);
    color: var(--dvm-ink);
}

.doc-signstroke__pad {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 8rem;
}

.doc-signstroke__svg {
    width: 100%;
    max-width: 24rem;
    height: auto;
    overflow: visible;
}

.doc-signstroke__path {
    fill: none;
    stroke: var(--dvm-green);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
}

.doc-signstroke.is-playing .doc-signstroke__path {
    animation: dvm-signstroke-draw 5s ease-in-out infinite;
}

.doc-signstroke__badge {
    position: absolute;
    right: 0;
    bottom: -0.4rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem;
    border-radius: 0.4rem;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-btn-text);
    background: var(--dvm-green);
    opacity: 0;
    transform: translateY(0.4rem);
}

.doc-signstroke.is-playing .doc-signstroke__badge {
    animation: dvm-signstroke-badge 5s ease-in-out infinite;
}

@keyframes dvm-signstroke-draw {
    0%, 8% { stroke-dashoffset: 1; }
    55%, 100% { stroke-dashoffset: 0; }
}

@keyframes dvm-signstroke-badge {
    0%, 58% { opacity: 0; transform: translateY(0.4rem); }
    68%, 92% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(0.4rem); }
}

/* E. doc-vault */
.doc-vault {
    position: relative;
    min-height: 22rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    background: var(--dvm-navy);
    overflow: hidden;
}

.doc-vault__stage {
    position: relative;
    width: 14rem;
    height: 14rem;
}

.doc-vault__glow {
    position: absolute;
    inset: -2rem;
    border-radius: 50%;
    background: radial-gradient(circle, color-mix(in srgb, var(--dvm-green) 25%, transparent) 0%, transparent 70%);
    opacity: 0.5;
}

.doc-vault.is-playing .doc-vault__glow {
    animation: dvm-vault-glow 3.6s ease-in-out infinite;
}

.doc-vault__ring--outer {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1.5px dashed color-mix(in srgb, #fff 22%, transparent);
}

.doc-vault.is-playing .doc-vault__ring--outer {
    animation: dvm-vault-rotate 14s linear infinite;
}

.doc-vault__ring--inner {
    position: absolute;
    inset: 1.6rem;
    border-radius: 50%;
    border: 1px solid color-mix(in srgb, #fff 14%, transparent);
}

.doc-vault__core {
    position: absolute;
    inset: 3.6rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--dvm-surface) 80%, transparent);
    border: 1px solid color-mix(in srgb, #fff 12%, transparent);
    color: rgba(255, 255, 255, 0.8);
}

.doc-vault.is-playing .doc-vault__core {
    animation: dvm-vault-unlock 3.6s ease-in-out infinite;
}

@keyframes dvm-vault-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes dvm-vault-glow {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.7; }
}

@keyframes dvm-vault-unlock {
    0%, 78% { color: rgba(255, 255, 255, 0.8); box-shadow: none; }
    84% { color: var(--dvm-green); box-shadow: 0 0 1.4rem color-mix(in srgb, var(--dvm-green) 55%, transparent); }
    92%, 100% { color: rgba(255, 255, 255, 0.8); box-shadow: none; }
}

/* F. doc-ring */
.doc-ring {
    position: relative;
    min-height: 22rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    background: var(--dvm-fill);
}

.doc-ring__gauge {
    position: relative;
    width: 14rem;
    height: 14rem;
}

.doc-ring__svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.doc-ring__track {
    fill: none;
    stroke: color-mix(in srgb, var(--color-border-alt) 20%, transparent);
    stroke-width: 8;
}

.doc-ring__progress {
    fill: none;
    stroke: var(--dvm-green);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 339.3;
    stroke-dashoffset: 339.3;
}

.doc-ring.is-playing .doc-ring__progress {
    animation: dvm-ring-draw 4.5s ease-in-out infinite;
}

.doc-ring__center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    pointer-events: none;
}

.doc-ring__value {
    margin: 0;
    font-size: clamp(2.8rem, 4vw, 3.6rem);
    font-weight: var(--weight-regular);
    letter-spacing: -0.02em;
    color: var(--dvm-ink);
}

.doc-ring__caption {
    margin: 0;
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dvm-dim);
}

@keyframes dvm-ring-draw {
    0%, 10% { stroke-dashoffset: 339.3; }
    60%, 100% { stroke-dashoffset: 6.8; }
}

/* G. doc-layers */
.doc-layers {
    position: relative;
    min-height: 22rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.4rem;
    border-radius: var(--radius);
    background: var(--dvm-fill-tint);
    perspective: 60rem;
}

.doc-layers__stage {
    position: relative;
    width: 16rem;
    height: 12rem;
    transform-style: preserve-3d;
}

.doc-layers__sheet {
    --doc-fill: var(--dvm-fill);
    position: absolute;
    inset: 0;
    padding: 1.6rem 1.8rem;
}

.doc-layers__sheet--back {
    --doc-fill: var(--dvm-fill-tint);
    transform: translateZ(-3.2rem) translateY(1.4rem) rotateX(8deg);
    z-index: 0;
}

.doc-layers__sheet--mid {
    --doc-fill: color-mix(in srgb, var(--dvm-fill-tint) 55%, var(--dvm-fill));
    transform: translateZ(-1.6rem) translateY(0.7rem) rotateX(4deg);
    z-index: 1;
}

.doc-layers__sheet--front {
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.doc-layers__sheet--front .doc-ico {
    color: var(--dvm-green);
}

.doc-layers__title {
    margin: 0;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--dvm-ink);
}

.doc-layers.is-playing .doc-layers__sheet--back {
    animation: dvm-layers-breathe-back 4.8s ease-in-out infinite;
}

.doc-layers.is-playing .doc-layers__sheet--mid {
    animation: dvm-layers-breathe-mid 4.8s ease-in-out infinite;
}

.doc-layers.is-playing .doc-layers__sheet--front {
    animation: dvm-layers-breathe-front 4.8s ease-in-out infinite;
}

@keyframes dvm-layers-breathe-back {
    0%, 100% { transform: translateZ(-3.2rem) translateY(1.4rem) rotateX(8deg); }
    50% { transform: translateZ(-4.4rem) translateY(2rem) rotateX(11deg); }
}

@keyframes dvm-layers-breathe-mid {
    0%, 100% { transform: translateZ(-1.6rem) translateY(0.7rem) rotateX(4deg); }
    50% { transform: translateZ(-2.4rem) translateY(1.1rem) rotateX(6deg); }
}

@keyframes dvm-layers-breathe-front {
    0%, 100% { transform: translateZ(0) translateY(0); }
    50% { transform: translateZ(0.6rem) translateY(-0.3rem); }
}

/* H. doc-glass */
.doc-glass {
    --doc-fill: var(--dvm-fill);
    position: relative;
    min-height: 22rem;
    padding: 2.4rem 2.6rem;
    overflow: hidden;
}

.doc-glass__lines {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    max-width: 70%;
}

.doc-glass__line {
    height: 1px;
    background: color-mix(in srgb, var(--color-border-alt) 20%, transparent);
}

.doc-glass__line:nth-child(1) { width: 88%; }
.doc-glass__line:nth-child(2) { width: 68%; }
.doc-glass__line:nth-child(3) { width: 94%; }
.doc-glass__line:nth-child(4) { width: 58%; }
.doc-glass__line:nth-child(5) { width: 78%; }

.doc-glass__overlay {
    position: absolute;
    left: 1.6rem;
    right: 1.6rem;
    bottom: 1.6rem;
    display: flex;
    gap: 1rem;
    padding: 1.4rem;
    border-radius: 0.7rem;
    background: color-mix(in srgb, color-mix(in srgb, #fff 85%, var(--dvm-navy)) 78%, transparent);
    backdrop-filter: blur(0.8rem);
    -webkit-backdrop-filter: blur(0.8rem);
    border: 1px solid color-mix(in srgb, #fff 40%, transparent);
    box-shadow: 0 1.2rem 2.4rem color-mix(in srgb, var(--dvm-navy) 18%, transparent);
}

.doc-glass__chip {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 0.6rem;
    border-radius: 0.5rem;
    text-align: center;
    background: color-mix(in srgb, #fff 55%, transparent);
    color: var(--dvm-ink);
}

.doc-glass__chip .doc-ico {
    color: var(--dvm-green);
}

.doc-glass__chip-label {
    font-size: 1.1rem;
    font-weight: var(--weight-semibold);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.doc-glass.is-playing .doc-glass__chip {
    animation: dvm-glass-rise 4.2s ease-in-out infinite;
}

.doc-glass.is-playing .doc-glass__chip:nth-child(2) { animation-delay: 0.25s; }
.doc-glass.is-playing .doc-glass__chip:nth-child(3) { animation-delay: 0.5s; }

@keyframes dvm-glass-rise {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-0.4rem); }
}

@media (prefers-reduced-motion: reduce) {
    .doc-vocab-mock .is-playing * {
        animation: none !important;
    }
}

@media (max-width: 900px) {
    .doc-vocab-mock__grid {
        grid-template-columns: 1fr;
    }

    .doc-beacon {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--gap-sm);
        min-height: 0;
        padding: 2.8rem 2.4rem;
    }

    .doc-beacon__chips {
        align-self: stretch;
        justify-content: flex-start;
    }

    .doc-beacon__glow {
        left: 50%;
        top: 20%;
    }

    .doc-pipeline__track {
        flex-direction: column;
        align-items: stretch;
        max-width: 20rem;
    }

    .doc-pipeline__node {
        flex-direction: row;
        justify-content: flex-start;
        gap: 1.2rem;
    }

    .doc-pipeline__label {
        white-space: normal;
    }

    .doc-pipeline__connector {
        width: 1px;
        height: 2.4rem;
        margin: 0 0 0 2.55rem;
    }

    .doc-pipeline.is-playing .doc-pipeline__pulse {
        animation-name: dvm-pipeline-pulse-v;
    }

    .doc-vault__stage,
    .doc-ring__gauge {
        width: 11.2rem;
        height: 11.2rem;
    }

    .doc-vault__core {
        inset: 2.8rem;
    }

    .doc-layers__stage {
        width: 13rem;
        height: 10rem;
    }

    .doc-glass__overlay {
        flex-wrap: wrap;
    }

    .doc-glass__chip {
        flex: 1 1 40%;
    }
}