/* AI IS POWER. WHO GETS IT? — campaign landing page.
   Palette, typography and layout sampled from the delivered ad system
   (docs/campaigns/fight). Near-black, warm paper, campaign gold,
   one muted red used only for warnings. */

.property-ai-power {
    --accent: #f0c407;
    --gold: #f0c407;
    --red: #d35043;
    --power-ink: #0f0f10;
    --power-ink-2: #16161a;
    --power-paper: #ebe7de;
    --power-paper-ink: #17131a;
    --power-white: #f8f7f3;
    --power-muted: #a5a099;
    --power-line: rgba(248, 247, 243, 0.14);
    --power-display: 'Oswald', 'Arial Narrow', 'Helvetica Neue', sans-serif;
    --power-sans: 'Roboto', Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
    --power-serif: Georgia, 'Times New Roman', serif;
    --power-mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    --power-ring: 88px;
    background: var(--power-ink);
    color: var(--power-white);
    font-family: var(--power-sans);
}

.property-ai-power .site-header {
    /* The letter is a long read on warm paper; a dark sticky bar riding over it
       fights the page. Chrome scrolls away, progress bar stays. */
    position: static;
    border-bottom-color: rgba(248, 247, 243, 0.1);
    background: var(--power-ink);
}

.property-ai-power .ecosystem-footer {
    border-top-color: var(--power-line);
    background: var(--power-ink);
    color: var(--power-muted);
}

/* ---------------------------------------------------------------- shared */

.property-ai-power a:focus-visible,
.property-ai-power button:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}

.power-letter a:focus-visible,
.power-letter button:focus-visible {
    outline-color: var(--power-paper-ink);
}

.power-rings {
    position: absolute;
    inset: -25% -12%;
    pointer-events: none;
    background: repeating-radial-gradient(circle at var(--power-ring-x, 50%) var(--power-ring-y, 50%),
        transparent 0 calc(var(--power-ring) - 1px),
        rgba(240, 196, 7, 0.5) calc(var(--power-ring) - 1px) var(--power-ring));
    -webkit-mask-image: radial-gradient(circle at var(--power-ring-x, 50%) var(--power-ring-y, 50%), #000 0 38%, transparent 72%);
    mask-image: radial-gradient(circle at var(--power-ring-x, 50%) var(--power-ring-y, 50%), #000 0 38%, transparent 72%);
}

.power-kicker {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 0;
    font: 700 0.72rem/1.1 var(--power-sans);
    letter-spacing: 0.17em;
    text-transform: uppercase;
    color: var(--power-white);
}

.power-kicker .from { color: var(--gold); }

.power-kicker::after {
    content: '';
    width: 30px;
    height: 4px;
    background: var(--gold);
}

.power-heading {
    margin: 1.4rem 0 0;
    font: 700 clamp(2.1rem, 5.6vw, 3.9rem)/0.98 var(--power-display);
    letter-spacing: 0.01em;
    text-transform: uppercase;
}

.power-heading .gold { color: var(--gold); }

.power-lede {
    max-width: 46ch;
    margin: 1.3rem 0 0;
    font-size: 1.02rem;
    line-height: 1.62;
    color: var(--power-muted);
}

.power-section {
    position: relative;
    padding: clamp(4rem, 8vw, 7rem) 0;
    border-top: 1px solid var(--power-line);
}

.power-section > .site-shell { position: relative; }

/* ------------------------------------------------------------------ hero */

.power-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(2.2rem, 4.5vw, 3.8rem) 0 clamp(2rem, 4vw, 3.2rem);
}

.power-hero .power-rings { --power-ring-x: 76%; --power-ring-y: 44%; opacity: 0.62; }

.power-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(96deg, var(--power-ink) 0 30%, rgba(15, 15, 16, 0.86) 46%, rgba(15, 15, 16, 0.25) 88%);
}

.power-hero > .site-shell { position: relative; z-index: 1; }

.power-title {
    margin: 1.3rem 0 0;
    font: 700 clamp(2.7rem, 8vw, 6.6rem)/0.92 var(--power-display);
    letter-spacing: 0.006em;
    text-transform: uppercase;
}

.power-title span { display: block; }
.power-title .gold { color: var(--gold); }

.power-subtitle {
    margin: 1.1rem 0 0;
    max-width: 46ch;
    font: 700 clamp(1rem, 1.9vw, 1.28rem)/1.34 var(--power-sans);
    color: var(--power-white);
}

.power-byline {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.45rem 1.5rem;
    margin: 1.6rem 0 0;
    padding-top: 1.2rem;
    border-top: 1px solid var(--power-line);
    max-width: 46rem;
    font: 400 0.74rem/1.5 var(--power-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--power-muted);
}

.power-byline--credit {
    display: block;
    margin-top: 0.7rem;
    padding-top: 0;
    border-top: 0;
    line-height: 1.7;
}

.power-byline strong {
    font-weight: 500;
    color: var(--power-white);
}

.power-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.power-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.75rem 1.4rem;
    border: 2px solid var(--gold);
    background: var(--gold);
    color: #111112;
    font: 700 0.78rem/1 var(--power-sans);
    letter-spacing: 0.09em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.18s, color 0.18s, transform 0.18s;
}

.power-button:hover,
.power-button:focus-visible { transform: translateY(-2px); }

.power-button--ghost {
    background: transparent;
    border-color: rgba(248, 247, 243, 0.32);
    color: var(--power-white);
}

.power-button--ghost:hover,
.power-button--ghost:focus-visible {
    border-color: var(--gold);
    color: var(--gold);
}

/* ----------------------------------------------------------------- share */

.power-share {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.9rem;
    margin: 2.2rem 0 0;
    padding-top: 1.4rem;
    border-top: 1px solid var(--power-line);
}

.power-share-label {
    margin: 0;
    font: 500 0.68rem/1 var(--power-mono);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
}

.power-share-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.power-share-list a,
.power-share-list button {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0.35rem 0.7rem;
    border: 1px solid rgba(248, 247, 243, 0.2);
    background: transparent;
    color: var(--power-white);
    font: 700 0.68rem/1 var(--power-sans);
    letter-spacing: 0.11em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.16s, color 0.16s, border-color 0.16s;
}

.power-share-list a:hover,
.power-share-list a:focus-visible,
.power-share-list button:hover,
.power-share-list button:focus-visible {
    border-color: var(--gold);
    background: var(--gold);
    color: #111112;
}

.power-share-list [data-native-share] { display: none; }
.power-share-list.is-native [data-native-share] { display: inline-flex; }

.power-share--paper { border-top-color: rgba(23, 19, 26, 0.16); }
.power-share--paper .power-share-label { color: #8a6f00; }

.power-share--paper .power-share-list a,
.power-share--paper .power-share-list button {
    border-color: rgba(23, 19, 26, 0.24);
    color: var(--power-paper-ink);
}

.power-share--paper .power-share-list a:hover,
.power-share--paper .power-share-list a:focus-visible,
.power-share--paper .power-share-list button:hover,
.power-share--paper .power-share-list button:focus-visible {
    border-color: var(--power-paper-ink);
    background: var(--power-paper-ink);
    color: var(--gold);
}

/* --------------------------------------------------------------- progress */

.power-progress {
    position: fixed;
    z-index: 60;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    transform: scaleX(0);
    transform-origin: 0 50%;
    background: var(--gold);
    pointer-events: none;
}

/* ---------------------------------------------------------------- letter */

.power-letter {
    background: var(--power-paper);
    color: var(--power-paper-ink);
    padding: clamp(3.5rem, 8vw, 7rem) 0 clamp(3rem, 7vw, 6rem);
}

.power-letter-inner {
    width: min(38rem, calc(100% - 2.5rem));
    margin-inline: auto;
}

.power-letter-mast {
    margin: 0 0 clamp(2.2rem, 5vw, 3.2rem);
    padding-bottom: 1.6rem;
    border-bottom: 3px solid var(--power-paper-ink);
}

.power-letter-mast h2 {
    margin: 0.7rem 0 0;
    font: 700 clamp(1.9rem, 6vw, 2.9rem)/1.16 var(--power-display);
    letter-spacing: 0.01em;
    text-transform: uppercase;
}

.power-letter-mast h2 span { display: block; }

.power-letter-mast h2 + p { margin-top: 1.6rem; }

.power-letter-mast .power-letter-date { margin-top: 0.4rem; }

.power-letter-mast p {
    margin: 0.85rem 0 0;
    font: 400 0.76rem/1.5 var(--power-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #6f665c;
}

.power-letter-mast .power-kicker { color: var(--power-paper-ink); }

.power-letter-inner p {
    margin: 0 0 1.2rem;
    font: 400 clamp(1.06rem, 1.2vw, 1.16rem)/1.66 var(--power-serif);
}

.power-letter-inner > p:first-of-type {
    font-size: clamp(1.25rem, 1.7vw, 1.42rem);
    line-height: 1.5;
}

.power-letter-inner p strong { font-weight: 700; }
.power-letter-inner p em { font-style: italic; }

.power-letter-inner p.letter-beat {
    margin: 2rem 0;
    font: 700 clamp(1.45rem, 3.9vw, 2rem)/1.15 var(--power-serif);
    letter-spacing: -0.015em;
}

.power-letter-inner p.letter-beat + p.letter-beat { margin-top: -0.9rem; }

.power-letter-inner p.letter-beat--quote {
    padding-left: 1.1rem;
    border-left: 5px solid var(--gold);
}

.line-share {
    display: inline-flex;
    align-items: center;
    margin-left: 0.65rem;
    padding: 0.34rem 0.5rem;
    border: 1px solid rgba(23, 19, 26, 0.22);
    background: transparent;
    color: #6f665c;
    font: 700 0.55rem/1 var(--power-sans);
    letter-spacing: 0.13em;
    text-transform: uppercase;
    white-space: nowrap;
    vertical-align: 0.3em;
    cursor: pointer;
    transition: background 0.16s, color 0.16s, border-color 0.16s;
}

.line-share:hover,
.line-share:focus-visible {
    border-color: var(--power-paper-ink);
    background: var(--power-paper-ink);
    color: var(--gold);
}

/* ----------------------------------------------------------------- terms */

.power-terms {
    position: relative;
    overflow: hidden;
    padding: clamp(4rem, 9vw, 7.5rem) 0;
    background: var(--power-ink);
}

.power-terms .power-rings { --power-ring-x: 50%; --power-ring-y: 46%; opacity: 0.75; }
.power-terms > .site-shell { position: relative; z-index: 1; }

.power-terms-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.power-terms-list li + li { margin-top: clamp(1.4rem, 3vw, 2.2rem); }

.power-terms-list span {
    display: block;
    font: 700 0.7rem/1 var(--power-sans);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
}

.power-terms-list strong {
    display: block;
    margin-top: 0.5rem;
    font: 700 clamp(2rem, 7vw, 4.4rem)/0.96 var(--power-display);
    letter-spacing: 0.008em;
    text-transform: uppercase;
    color: var(--power-white);
}

.power-signature {
    margin-top: clamp(3rem, 6vw, 4.5rem);
    padding-top: 2rem;
    border-top: 1px solid var(--power-line);
}

.power-signature-primary {
    display: grid;
    gap: 1.6rem 2.5rem;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    max-width: 40rem;
}

.power-signature-secondary {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2.5rem;
    margin-top: 1.9rem;
}

.power-signature-secondary .name {
    font-size: 0.92rem;
    letter-spacing: 0.03em;
}

.power-signature-secondary .role {
    margin-top: 0.2rem;
    font-size: 0.55rem;
}

.power-signature p { margin: 0; }

.power-signature .name {
    display: block;
    font: 700 1.35rem/1.1 var(--power-display);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--power-white);
}

.power-signature .role {
    display: block;
    margin-top: 0.35rem;
    font: 400 0.62rem/1.5 var(--power-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--power-muted);
}

.power-disclosure {
    max-width: none;
    margin: 3.4rem 0 0.6rem;
    font-size: 0.84rem;
    line-height: 1.6;
    font-style: italic;
    color: var(--power-muted);
}

/* ------------------------------------------------------------ provenance */

.power-section--method { background: var(--power-ink-2); }

.power-grid {
    display: grid;
    gap: 1px;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    margin-top: clamp(2.5rem, 5vw, 3.5rem);
    background: var(--power-line);
    border: 1px solid var(--power-line);
}

.power-card {
    padding: 1.8rem;
    background: var(--power-ink-2);
}

.power-card h3 {
    margin: 0 0 1rem;
    font: 500 0.68rem/1.4 var(--power-mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
}

.power-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.power-card li + li {
    margin-top: 0.9rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--power-line);
}

.power-card .name {
    display: block;
    font: 700 1.05rem/1.25 var(--power-sans);
    color: var(--power-white);
}

.power-card .org {
    display: block;
    margin-top: 0.2rem;
    font: 400 0.74rem/1.4 var(--power-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--power-muted);
}

.power-note {
    max-width: 68ch;
    margin: clamp(2rem, 4vw, 2.6rem) 0 0;
    padding-left: 1.1rem;
    border-left: 3px solid var(--red);
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--power-muted);
}

/* ---------------------------------------------------------------- people */

.power-people-copy {
    max-width: 34rem;
    margin: clamp(2rem, 4vw, 2.8rem) 0 0;
}

.power-people-copy p {
    margin: 0 0 1rem;
    font: 400 clamp(1.05rem, 1.3vw, 1.2rem)/1.6 var(--power-serif);
    color: var(--power-white);
}

.power-people-copy p.muted { color: var(--power-muted); font-size: 0.95rem; }

/* --------------------------------------------------------------- sources */

.power-sources {
    margin: clamp(2.5rem, 5vw, 3.5rem) 0 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--power-line);
}

.power-sources li {
    display: grid;
    grid-template-columns: 12rem 1fr;
    gap: 0.4rem 2rem;
    padding: 1.35rem 0;
    border-bottom: 1px solid var(--power-line);
}

.power-sources dfn {
    font: 500 0.68rem/1.5 var(--power-mono);
    font-style: normal;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
}

.power-sources a {
    font: 400 1.05rem/1.4 var(--power-serif);
    color: var(--power-white);
    border-bottom: 1px solid rgba(248, 247, 243, 0.3);
}

.power-sources a:hover,
.power-sources a:focus-visible {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

.power-sources .meta {
    display: block;
    margin-top: 0.3rem;
    font: 400 0.76rem/1.5 var(--power-mono);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--power-muted);
}

/* ----------------------------------------------------------------- close */

.power-close { text-align: left; }

.power-close .power-heading { max-width: 18ch; }

/* ----------------------------------------------------------------- toast */

.power-toast {
    position: fixed;
    z-index: 80;
    left: 50%;
    bottom: 1.5rem;
    transform: translate(-50%, 1.5rem);
    padding: 0.8rem 1.2rem;
    background: var(--gold);
    color: #111112;
    font: 700 0.72rem/1 var(--power-sans);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
}

.power-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ---------------------------------------------------------------- mobile */

@media (max-width: 900px) {
    .property-ai-power { --power-ring: 58px; }
    .power-hero::after { background: linear-gradient(180deg, rgba(15, 15, 16, 0.92) 0 55%, rgba(15, 15, 16, 0.7) 100%); }
    .power-sources li { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
    .power-letter-inner p.letter-beat--quote { padding-left: 0.85rem; }
    .line-share {
        display: block;
        width: max-content;
        margin: 0.7rem 0 0;
        vertical-align: baseline;
    }
    .power-byline { font-size: 0.68rem; }
}

@media (prefers-reduced-motion: reduce) {
    .power-button:hover,
    .power-button:focus-visible { transform: none; }
    .power-progress,
    .power-toast { transition: none; }
}

/* ----------------------------------------------------------------- spine */

.power-spine {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
    border-top: 1px solid var(--power-line);
    background: var(--power-ink-2);
}

.power-spine-list {
    display: grid;
    gap: 1px;
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
    margin: 1.6rem 0 0;
    padding: 0;
    list-style: none;
    counter-reset: spine;
    background: var(--power-line);
    border: 1px solid var(--power-line);
}

.power-spine-list li { display: contents; }

.power-spine-list a {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    padding: 1.4rem 1.5rem 1.6rem;
    background: var(--power-ink-2);
    counter-increment: spine;
    transition: background 0.16s;
}

.power-spine-list a::before {
    content: '0' counter(spine);
    font: 500 0.66rem/1 var(--power-mono);
    letter-spacing: 0.18em;
    color: var(--gold);
}

.power-spine-list .q .brand {
    display: block;
    margin-bottom: 0.15rem;
    color: var(--gold);
}

.power-spine-list .q {
    font: 700 1.25rem/1.05 var(--power-display);
    letter-spacing: 0.015em;
    text-transform: uppercase;
    color: var(--power-white);
}

.power-spine-list .a {
    font: italic 400 0.88rem/1.45 var(--power-serif);
    color: var(--power-muted);
}

.power-spine-list a:hover,
.power-spine-list a:focus-visible { background: #1d1d22; }

.power-spine-list a:hover .q,
.power-spine-list a:focus-visible .q { color: var(--gold); }
.power-spine-list a:hover .q .brand,
.power-spine-list a:focus-visible .q .brand { color: var(--power-white); }

.power-letter [id] { scroll-margin-top: 2.25rem; }

@media (max-width: 560px) {
    .power-spine-list { grid-template-columns: 1fr; }
}

.power-nowrap { white-space: nowrap; }

/* ------------------------------------------------------------ photography */

.power-hero {
    background: url('/assets/ai-power/station.jpg') right 35% / cover no-repeat var(--power-ink);
}

.power-people-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: center;
}

.power-people-grid .power-people-copy { margin-top: clamp(2rem, 4vw, 2.8rem); }

.power-figure { margin: clamp(2rem, 4vw, 2.8rem) 0 0; }

.power-figure img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--power-line);
}

.power-photo-band {
    margin: 0;
    border-top: 1px solid var(--power-line);
}

.power-photo-band img {
    display: block;
    width: 100%;
    height: clamp(200px, 30vw, 380px);
    object-fit: cover;
    object-position: center 40%;
}

.power-close {
    background: linear-gradient(100deg, rgba(15, 15, 16, 0.96) 0 45%, rgba(15, 15, 16, 0.8) 100%),
        url('/assets/ai-power/corridor.jpg') center 30% / cover no-repeat var(--power-ink);
}

@media (max-width: 900px) {
    .power-people-grid { grid-template-columns: 1fr; }
    .power-figure { margin-top: 0.5rem; }
}

/* ------------------------------------------------------------ author links */

.power-ai-link {
    color: inherit;
    border-bottom: 1px solid rgba(240, 196, 7, 0.4);
    transition: color 0.15s, border-color 0.15s;
}

.power-ai-link:hover,
.power-ai-link:focus-visible {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

/* ------------------------------------------ the power line + ignition */

[data-power-share-root] { position: relative; }

.power-conductor {
    position: absolute;
    left: max(0.5rem, calc((100% - 1180px) / 2 - 2.5rem));
    width: 2px;
    background: rgba(240, 196, 7, 0.13);
    pointer-events: none;
    z-index: 5;
}

.power-conductor-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(240, 196, 7, 0.55);
}

.power-conductor-fill::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -4px;
    width: 8px;
    height: 8px;
    transform: translateX(-50%);
    border-radius: 99px;
    background: var(--gold);
    box-shadow: 0 0 10px 2px rgba(240, 196, 7, 0.55);
}

@media (max-width: 900px) {
    .power-conductor { display: none; }
}

/* ignition: dim states exist only when JS enables .power-fx (and motion is allowed) */

.power-fx .power-letter-inner p.letter-beat {
    color: #8e8d90;
    transition: color 0.5s ease;
}

.power-fx .power-letter-inner p.letter-beat.is-lit { color: var(--power-paper-ink); }

.power-fx .power-letter-inner p.letter-beat--quote {
    border-left-color: rgba(240, 196, 7, 0.18);
    transition: color 0.5s ease, border-color 0.5s ease;
}

.power-fx .power-letter-inner p.letter-beat--quote.is-lit { border-left-color: var(--gold); }

.power-fx .power-spine-list a .q,
.power-fx .power-spine-list a .q .brand,
.power-fx .power-spine-list a::before {
    opacity: 0.35;
    transition: opacity 0.45s ease;
}

.power-fx .power-spine-list a.is-lit .q,
.power-fx .power-spine-list a.is-lit .q .brand,
.power-fx .power-spine-list a.is-lit::before { opacity: 1; }

.power-fx .power-spine-list li:nth-child(2) a .q, .power-fx .power-spine-list li:nth-child(2) a::before { transition-delay: 0.08s; }
.power-fx .power-spine-list li:nth-child(3) a .q, .power-fx .power-spine-list li:nth-child(3) a::before { transition-delay: 0.16s; }
.power-fx .power-spine-list li:nth-child(4) a .q, .power-fx .power-spine-list li:nth-child(4) a::before { transition-delay: 0.24s; }
.power-fx .power-spine-list li:nth-child(5) a .q, .power-fx .power-spine-list li:nth-child(5) a::before { transition-delay: 0.32s; }

/* --------------------------------------------------------- letter stations */

.power-letter-inner .power-station {
    margin: 2.6rem 0 0;
    font: 500 0.68rem/1.4 var(--power-mono);
    letter-spacing: 0.17em;
    text-transform: uppercase;
    color: #8a6f00;
}

.power-letter-inner .power-station::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 3px;
    margin-right: 0.6rem;
    vertical-align: 0.18em;
    background: var(--gold);
}

.power-letter-inner .power-station + p.letter-beat { margin-top: 0.9rem; }

/* ------------------------------------------------------------ back to top */

.power-top {
    position: fixed;
    z-index: 70;
    right: 1.25rem;
    bottom: 1.25rem;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.6rem 0.85rem;
    border: 1px solid rgba(240, 196, 7, 0.5);
    background: rgba(15, 15, 16, 0.92);
    color: var(--gold);
    font: 700 0.66rem/1 var(--power-sans);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
    opacity: 0;
    transform: translateY(0.6rem);
    pointer-events: none;
    transition: opacity 0.25s, transform 0.25s, background 0.18s, color 0.18s;
}

.power-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.power-top:hover,
.power-top:focus-visible {
    background: var(--gold);
    color: #111112;
}

/* -------------------------------------------------------- crackle energy */

@media (prefers-reduced-motion: no-preference) {
    .power-conductor-fill::after {
        animation: power-pulse 1.7s ease-in-out infinite;
    }

    .power-conductor-fill::before {
        content: '';
        position: absolute;
        left: 3px;
        bottom: -7px;
        width: 11px;
        height: 15px;
        background: var(--gold);
        clip-path: polygon(58% 0, 18% 56%, 44% 56%, 34% 100%, 82% 38%, 52% 38%);
        transform-origin: 30% 20%;
        animation: power-crackle 2.3s steps(2, jump-none) infinite;
    }

    .power-fx .power-letter-inner p.letter-beat.is-lit {
        animation: power-catch 0.55s steps(1) 1;
    }

    .power-fx .power-spine-list a.is-lit {
        animation: power-catch 0.5s steps(1) 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .power-conductor-fill { display: none; }
}

@keyframes power-pulse {
    0%, 100% { box-shadow: 0 0 10px 2px rgba(240, 196, 7, 0.55); }
    50% { box-shadow: 0 0 16px 4px rgba(240, 196, 7, 0.85); }
}

@keyframes power-crackle {
    0%, 100% { opacity: 0; transform: rotate(0deg) scale(0.9); }
    8% { opacity: 1; transform: rotate(-14deg) scale(1); }
    12% { opacity: 0.25; }
    16% { opacity: 1; transform: rotate(9deg) scale(1.1); }
    22% { opacity: 0; }
    54% { opacity: 0; }
    58% { opacity: 0.9; transform: rotate(16deg) scale(0.95); }
    64% { opacity: 0; }
}

@keyframes power-catch {
    0% { opacity: 0.4; }
    22% { opacity: 1; color: #a07d00; }
    38% { opacity: 0.5; }
    52% { opacity: 1; color: #8a6f00; }
    70% { opacity: 0.75; }
    100% { opacity: 1; }
}

.power-figure figcaption {
    margin-top: 0.6rem;
    font: 400 0.66rem/1.5 var(--power-mono);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--power-muted);
}

/* -------------------------------------------------------- in-letter figures */

.power-letter-figure {
    margin: 2.6rem 0;
}

.power-letter-figure img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid rgba(23, 19, 26, 0.14);
}

.power-letter-figure figcaption {
    margin-top: 0.55rem;
    font: 400 0.64rem/1.5 var(--power-mono);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #6f665c;
}

@media (min-width: 1000px) {
    .power-letter-figure--wide {
        width: min(56rem, calc(100vw - 4rem));
        margin-left: 50%;
        transform: translateX(-50%);
    }
}

/* left/right pull-outs — the letter breathes into its margins */

.power-letter-figure { clear: both; }

.power-station { clear: both; }

@media (min-width: 1100px) {
    .power-letter-figure--left,
    .power-letter-figure--right {
        clear: none;
        width: 23rem;
        margin-top: 0.5rem;
        margin-bottom: 1.4rem;
    }
    .power-letter-figure--left {
        float: left;
        margin-left: -11.5rem;
        margin-right: 2.2rem;
    }
    .power-letter-figure--right {
        float: right;
        margin-right: -11.5rem;
        margin-left: 2.2rem;
    }
}