/* ── Video Essay — scrollytelling layout ─────────────────────────────
   Tokens mirror css/style.css (see docs/STYLE_GUIDE.md). Standalone so
   essay pages don't inherit the home page's overflow:hidden hero rules. */
:root {
    --font-ui: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-body: Georgia, 'Times New Roman', serif;
    --ls-ui: 2px;
    --ls-label: 3px;
    --fw-ui: 700;
    --c-text: #ffffff;
    --c-text-dim: rgba(255,255,255,0.5);
    --c-accent: #FFDD66;
    --c-scrim: rgba(0,0,0,0.45);
    --glow-accent: 0 0 12px rgba(255,221,102,0.55), 0 0 26px rgba(255,221,102,0.25);
}

@font-face {
    font-family: 'NCL Neo Vibes';
    src: url('../docs/ncl_neovibes/woff/NCLNeovibes-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body.essay-body {
    font-family: var(--font-ui);
    color: var(--c-text);
    background-color: #000;
    overflow-x: hidden;
}

/* ── Fixed background layer (two imgs crossfade) ── */
.essay-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    background: #000;
}
.essay-bg img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 50%;
    opacity: 0;
    transform: scale(1.04);
    transition: opacity 1.1s ease, transform 8s ease-out;
    will-change: opacity, transform;
}
.essay-bg img.active {
    opacity: 1;
    transform: scale(1);
}
/* Gentle global scrim so white text always survives bright skies */
.essay-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.12) 35%, rgba(0,0,0,0.12) 65%, rgba(0,0,0,0.45) 100%);
    pointer-events: none;
}

/* ── Progress bar + top chrome ── */
.essay-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: var(--c-accent);
    box-shadow: var(--glow-accent);
    z-index: 30;
    transition: width 0.15s linear;
}
.essay-topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    z-index: 20;
    pointer-events: none;
}
.essay-topbar a,
.essay-chapter-label {
    pointer-events: auto;
    font-family: var(--font-ui);
    font-weight: var(--fw-ui);
    font-size: 0.72rem;
    letter-spacing: var(--ls-label);
    text-transform: uppercase;
    color: var(--c-text);
    text-decoration: none;
    text-shadow: 0 1px 8px rgba(0,0,0,0.8);
    opacity: 0.85;
}
.essay-topbar a:hover { color: var(--c-accent); }
.essay-chapter-label {
    color: var(--c-text-dim);
    transition: opacity 0.4s ease;
}

/* ── Hero / title screen ── */
.essay-hero {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 24px;
}
.essay-kicker {
    font-size: 0.72rem;
    font-weight: var(--fw-ui);
    letter-spacing: var(--ls-label);
    text-transform: uppercase;
    color: var(--c-accent);
    text-shadow: 0 1px 10px rgba(0,0,0,0.8);
    margin-bottom: 18px;
}
.essay-title {
    font-family: var(--font-ui);
    font-weight: var(--fw-ui);
    text-transform: uppercase;
    letter-spacing: var(--ls-ui);
    font-size: clamp(1.6rem, 5.5vw, 3.4rem);
    line-height: 1.2;
    max-width: 16ch;
    text-shadow: 0 2px 24px rgba(0,0,0,0.75);
}
.essay-byline {
    margin-top: 20px;
    font-size: 0.8rem;
    letter-spacing: var(--ls-ui);
    text-transform: uppercase;
    color: var(--c-text-dim);
    text-shadow: 0 1px 8px rgba(0,0,0,0.8);
}
.essay-scroll-hint {
    position: absolute;
    bottom: 34px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.68rem;
    letter-spacing: var(--ls-label);
    text-transform: uppercase;
    color: var(--c-text-dim);
    animation: essay-bob 2.2s ease-in-out infinite;
}
@keyframes essay-bob {
    0%, 100% { transform: translate(-50%, 0); opacity: 0.55; }
    50%      { transform: translate(-50%, 8px); opacity: 1; }
}

/* ── Chapters ── */
.essay-chapter {
    position: relative;
    z-index: 10;
    padding: 38vh 0 30vh;
}
.essay-chapter-heading {
    margin: 0 auto 26vh;
    max-width: 620px;
    padding: 0 24px;
    text-align: center;
    font-family: var(--font-ui);
    font-weight: var(--fw-ui);
    text-transform: uppercase;
    letter-spacing: var(--ls-ui);
    font-size: clamp(1.1rem, 3.2vw, 1.7rem);
    text-shadow: 0 2px 18px rgba(0,0,0,0.8);
}
.essay-chapter-heading .rule {
    display: block;
    width: 44px;
    height: 3px;
    margin: 16px auto 0;
    background: var(--c-accent);
    box-shadow: var(--glow-accent);
}

/* Text cards that float over the photo */
.essay-block {
    max-width: 620px;
    margin: 0 auto 55vh;
    padding: 26px 28px;
    background: var(--c-scrim);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 14px;
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.essay-block.in-view {
    opacity: 1;
    transform: translateY(0);
}
.essay-block:last-child { margin-bottom: 0; }
.essay-block p {
    font-family: var(--font-body);
    font-size: 1.08rem;
    line-height: 1.75;
    color: rgba(255,255,255,0.94);
}
.essay-block p + p { margin-top: 1.1em; }
.essay-block em { color: var(--c-accent); font-style: italic; }

/* Wrapper adds side gutters on small screens */
.essay-flow { padding: 0 18px; }

/* ── End card / CTA ── */
.essay-end {
    position: relative;
    z-index: 10;
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 24px;
    gap: 26px;
}
.essay-end-title {
    font-family: var(--font-body);
    font-style: italic;
    font-weight: 400;
    font-size: clamp(1.5rem, 4.5vw, 2.4rem);
    line-height: 1.45;
    max-width: 24ch;
    text-shadow: 0 2px 24px rgba(0,0,0,0.8);
}
.essay-end-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 28px;
}
.essay-end-links a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-body);
    font-style: italic;
    font-weight: 400;
    font-size: 1.02rem;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,0.88);
    text-decoration: none;
    padding: 11px 24px;
    border: 1px solid rgba(255,255,255,0.28);
    border-radius: 999px;
    background: var(--c-scrim);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.essay-end-links a:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
    box-shadow: var(--glow-accent);
}
.essay-end-links a svg {
    width: 18px;
    height: 18px;
    flex: none;
}
.essay-stepper button svg {
    width: 18px;
    height: 18px;
    display: block;
    margin: 0 auto;
}

/* ── Paragraph stepper (swipe / arrows / buttons) ── */
.essay-stepper {
    position: fixed;
    right: 16px;
    bottom: 22px;
    z-index: 25;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.essay-stepper button {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.45);
    background: var(--c-scrim);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--c-text);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.essay-stepper button:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
    box-shadow: var(--glow-accent);
}

/* ── Mobile tuning ── */
@media (max-width: 600px) {
    .essay-chapter { padding: 32vh 0 24vh; }
    .essay-block {
        padding: 20px 20px;
        margin-bottom: 48vh;
        border-radius: 12px;
    }
    .essay-block p { font-size: 1rem; line-height: 1.7; }
    .essay-topbar { padding: 14px 16px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .essay-bg img { transition: opacity 0.4s ease; transform: none; }
    .essay-block { transition: none; opacity: 1; transform: none; }
    .essay-scroll-hint { animation: none; }
}