/* =============================================================
   20241204.com — a meditation on a single day
   muji minimalism · kinetic typography · HUD overlay · glitch
   HUD clock showing "2024.12.04 — HH:MM" where HH:MM interpolates based on scroll position.
   Typeface notes: Space Grotesk (variable weight 300–700), IBM Plex Mono (weight 300).
   Palette note: Interactive Hover | Deep Pewter | #48484A | IntersectionObserver` detects 30% visibility.
   ============================================================= */

:root {
    /* Palette — exact hex from DESIGN.md */
    --bg-dawn:      #F4F1EC;  /* Warm Stone White */
    --bg-midday:   #E8E6E1;  /* Midday Neutral */
    --bg-night:    #2C2C2E;  /* Night Charcoal */
    --ink:         #2C2C2E;  /* Charcoal Ink */
    --ink-inv:     #F4F1EC;
    --slate:       #8E8E93;  /* Slate Gray */
    --hud-line:    #B0B3B8;  /* Cool Silver */
    --hud-line-dk: #636366;  /* Pewter for dark phases */
    --divider:     #D1D1D6;  /* Mist Gray */
    --hover:       #48484A;  /* Deep Pewter */
    --glitch-cyan: #7FDBDA;  /* Frost Cyan */
    --glitch-rose: #E8A0BF;  /* Signal Rose */
    --glitch-lav:  #B4A7D6;  /* Static Lavender */

    /* Dynamic (updated by JS from scroll) */
    --page-bg: var(--bg-dawn);
    --page-ink: var(--ink);
    --page-hud: var(--hud-line);
    --time-progress: 0;

    /* Type */
    --f-sans: "Space Grotesk", "Inter", system-ui, sans-serif;
    --f-disp: "Syne", "Space Grotesk", Georgia, serif;
    --f-mono: "IBM Plex Mono", "Space Mono", ui-monospace, monospace;

    --hud-pad: 28px;
}

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

html, body {
    background: var(--page-bg);
    color: var(--page-ink);
    font-family: var(--f-sans);
    font-size: 17px;
    line-height: 1.7;
    font-weight: 400;
    transition: background-color 0.6s linear, color 0.6s linear;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    padding: 0;
}

::selection { background: var(--glitch-cyan); color: var(--ink); }

/* ============================================================
   GRAIN + SCAN overlays
   ============================================================ */
.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 60;
    opacity: 0.035;
    mix-blend-mode: multiply;
    background-image:
        radial-gradient(circle at 13% 27%, rgba(0,0,0,0.9) 0.5px, transparent 1px),
        radial-gradient(circle at 71% 84%, rgba(0,0,0,0.9) 0.5px, transparent 1px),
        radial-gradient(circle at 42% 61%, rgba(0,0,0,0.9) 0.5px, transparent 1px),
        radial-gradient(circle at 87% 18%, rgba(0,0,0,0.9) 0.5px, transparent 1px),
        radial-gradient(circle at 28% 92%, rgba(0,0,0,0.9) 0.5px, transparent 1px);
    background-size: 3px 3px, 5px 5px, 7px 7px, 4px 4px, 6px 6px;
}

.glitch-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 70;
    opacity: 0;
    background:
        repeating-linear-gradient(
            to bottom,
            rgba(0,0,0,0) 0px,
            rgba(0,0,0,0) 2px,
            rgba(0,0,0,0.08) 2px,
            rgba(0,0,0,0.08) 3px
        );
    mix-blend-mode: multiply;
    transition: opacity 0.12s ease-out;
}
.glitch-overlay.is-active {
    opacity: 1;
}

body.is-glitching {
    animation: glitchShake 0.5s ease-out;
}
body.is-glitching .wrap {
    filter: hue-rotate(15deg);
}
@keyframes glitchShake {
    0%   { transform: translate(0, 0); }
    10%  { transform: translate(3px, -2px); }
    20%  { transform: translate(-2px, 1px); }
    35%  { transform: translate(2px, 2px); }
    50%  { transform: translate(-3px, -1px); }
    70%  { transform: translate(1px, -2px); }
    100% { transform: translate(0, 0); }
}

/* ============================================================
   HUD OVERLAY
   ============================================================ */
.hud {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 50;
    color: var(--page-hud);
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 300;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color 0.6s linear;
}

.hud-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    color: var(--page-hud);
    opacity: 0.55;
}
.hud-corner--tl { top: 16px; left: 16px; }
.hud-corner--tr { top: 16px; right: 16px; }
.hud-corner--bl { bottom: 16px; left: 16px; }
.hud-corner--br { bottom: 16px; right: 16px; }

.hud-timestamp {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0.6;
}
.hud-timestamp .hud-label {
    color: var(--glitch-rose);
    font-weight: 400;
    letter-spacing: 0.16em;
    opacity: 0.85;
}
.hud-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--glitch-rose);
    animation: pulseDot 1.6s infinite ease-in-out;
    opacity: 0.85;
}
@keyframes pulseDot {
    0%, 100% { opacity: 0.25; transform: scale(0.8); }
    50%      { opacity: 0.9;  transform: scale(1.0); }
}
.hud-sep { opacity: 0.4; }
.hud-clock { font-variant-numeric: tabular-nums; }

.hud-meta {
    position: absolute;
    font-family: var(--f-mono);
    font-size: 10.5px;
    opacity: 0.6;
    line-height: 1.6;
}
.hud-meta--tr {
    top: 58px;
    right: 28px;
    text-align: right;
}
.hud-row {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}
.hud-k {
    color: var(--slate);
    opacity: 0.75;
    min-width: 2.4em;
}
.hud-v {
    color: var(--page-hud);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.05em;
}

.hud-compass {
    position: absolute;
    bottom: 28px;
    left: 28px;
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.6;
}
.hud-compass svg { color: var(--page-hud); }
.hud-compass-caption {
    font-size: 10.5px;
    line-height: 1.5;
}
#compassNeedle { transition: transform 0.4s ease-out; }

.hud-frameindex {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    opacity: 0.55;
    font-size: 10.5px;
}

.hud-progress {
    position: absolute;
    right: 18px;
    top: 120px;
    bottom: 120px;
    width: 2px;
}
.hud-progress-track {
    position: absolute; inset: 0;
    background: var(--page-hud);
    opacity: 0.2;
}
.hud-progress-fill {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 0%;
    background: var(--glitch-cyan);
    transition: height 0.1s linear;
}
.hud-progress-tick {
    position: absolute;
    left: -4px;
    width: 10px;
    height: 1px;
    background: var(--page-hud);
    opacity: 0.4;
}

.hud-connector {
    position: absolute;
    top: 58px;
    right: 28px;
    width: 40vw;
    height: 50vh;
    opacity: 0;
    transition: opacity 0.6s ease;
    color: var(--page-hud);
}

/* ============================================================
   MAIN LAYOUT WRAP
   ============================================================ */
.wrap {
    max-width: 100%;
    padding: 0 8vw;
    position: relative;
    z-index: 1;
}

@media (min-width: 900px) {
    .wrap { padding: 0 12vw; }
}
@media (min-width: 1400px) {
    .wrap { padding: 0 16vw; }
}

/* ============================================================
   PROLOGUE (date hero)
   ============================================================ */
.chapter--prologue {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
}
.prologue {
    width: 100%;
    text-align: center;
    position: relative;
}
.prologue-stamp {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--slate);
    margin-bottom: 48px;
    display: inline-flex;
    gap: 10px;
    padding: 6px 14px;
    border: 1px solid var(--divider);
}

.megadate {
    font-family: var(--f-disp);
    font-weight: 800;
    font-size: clamp(3.2rem, 10vw, 9rem);
    line-height: 0.92;
    letter-spacing: -0.02em;
    color: var(--page-ink);
    margin: 0 auto 48px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
}
.mega-char {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
}
.megadate.is-in .mega-char {
    opacity: 1;
    transform: translateY(0);
}
.mega-sep {
    display: inline-block;
    color: var(--slate);
    opacity: 0.45;
    margin: 0 0.3em;
    font-weight: 700;
    transform: translateY(-0.15em);
}

.prologue-caption {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--slate);
    letter-spacing: 0.04em;
    margin-bottom: 80px;
}
.prologue-caption .mono-line + .mono-line { margin-top: 8px; }

.prologue-hint {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    color: var(--slate);
}
.scroll-arrow {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, transparent, var(--slate), transparent);
    animation: scrollPulse 2.4s infinite ease-in-out;
}
@keyframes scrollPulse {
    0%, 100% { transform: scaleY(0.6); opacity: 0.4; }
    50%      { transform: scaleY(1.0); opacity: 1.0; }
}
.mono-small {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--slate);
    font-weight: 300;
}

/* ============================================================
   INTERVALS
   ============================================================ */
.interval {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: var(--hud-line);
}
.interval-rule {
    width: 100%;
    max-width: 40vw;
    height: 1px;
    background: var(--divider);
    opacity: 0.6;
}
.interval-glyph {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--page-bg);
    padding: 0 18px;
    color: var(--slate);
    opacity: 0.65;
    transition: background-color 0.6s linear;
}

/* ============================================================
   CHAPTER
   ============================================================ */
.chapter {
    min-height: 100vh;
    padding: 120px 0 80px;
    display: flex;
    align-items: flex-start;
    position: relative;
    opacity: 0.15;
    transform: scale(0.97);
    transition: opacity 1.2s ease, transform 1.2s ease;
}
.chapter.is-awake {
    opacity: 1;
    transform: scale(1);
}
.chapter.is-past {
    opacity: 0.8;
}

.chapter-inner {
    width: 100%;
    max-width: 840px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    position: relative;
}

.chapter-meta {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--slate);
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--divider);
}
.meta-row {
    display: inline-flex;
    gap: 8px;
    align-items: baseline;
}

.chapter-title-wrap {
    display: flex;
    align-items: baseline;
    gap: 24px;
    flex-wrap: wrap;
}
.chapter-number {
    color: var(--slate);
    font-family: var(--f-mono);
    font-size: 13px;
    letter-spacing: 0.22em;
    opacity: 0.7;
}
.chapter-title {
    font-family: var(--f-disp);
    font-weight: 800;
    font-size: clamp(3rem, 7vw, 7rem);
    line-height: 1.0;
    letter-spacing: -0.02em;
    color: var(--page-ink);
    word-break: break-word;
}

/* kinetic character */
.kinetic .kchar,
.kinetic .kspace {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.32s ease, transform 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.kinetic.is-in .kchar,
.kinetic.is-in .kspace {
    opacity: 1;
    transform: translateY(0);
}
.kinetic .kchar.glitch-flash {
    animation: charGlitch 0.22s steps(2, end);
}
@keyframes charGlitch {
    0%   { transform: translate(2px, 0); text-shadow: -2px 0 var(--glitch-cyan), 2px 0 var(--glitch-rose); }
    50%  { transform: translate(-2px, 0); text-shadow: 2px 0 var(--glitch-cyan), -2px 0 var(--glitch-rose); }
    100% { transform: translate(0, 0); text-shadow: none; }
}
.kinetic .kspace { width: 0.32em; }

.chapter-body {
    font-size: 17px;
    line-height: 1.7;
    color: var(--page-ink);
    max-width: 58ch;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.8s ease 0.5s, transform 0.8s ease 0.5s;
}
.chapter.is-awake .chapter-body {
    opacity: 1;
    transform: translateY(0);
}
.chapter-body p + p { margin-top: 1.2em; }

/* ============================================================
   PHOTOS — abstract CSS "photographs" (no external images)
   ============================================================ */
.chapter-figure {
    margin: 0;
    position: relative;
}
.chapter-figure--wide {
    margin-left: -4vw;
    margin-right: -4vw;
}
.chapter-figure--full {
    margin-left: calc(-1 * max(6vw, 40px));
    margin-right: calc(-1 * max(6vw, 40px));
}

.photo {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #d8d4ce;
    filter: blur(20px) saturate(0.85);
    transition: filter 1.2s ease;
}
.chapter.is-awake .photo {
    filter: blur(0px) saturate(0.85);
}
.photo:hover {
    filter: blur(0px) saturate(0.85);
    animation: chromAb 0.5s ease-out;
}
@keyframes chromAb {
    0%   { text-shadow: none; }
    50%  { filter: blur(0px) saturate(0.85) drop-shadow(2px 0 var(--glitch-rose)) drop-shadow(-2px 0 var(--glitch-cyan)); }
    100% { filter: blur(0px) saturate(0.85); }
}

.photo-inner {
    position: absolute;
    inset: 0;
}

.photo-grain {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    mix-blend-mode: overlay;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(0,0,0,0.4) 0.5px, transparent 1.2px),
        radial-gradient(circle at 65% 80%, rgba(255,255,255,0.3) 0.5px, transparent 1.2px),
        radial-gradient(circle at 40% 60%, rgba(0,0,0,0.4) 0.5px, transparent 1.2px);
    background-size: 4px 4px, 5px 5px, 6px 6px;
}

/* --- dawn: bare birch, pale pink sky --- */
.photo--dawn .photo-inner {
    background:
        linear-gradient(to bottom, #E8DFD7 0%, #D6CFC6 60%, #B8B1A6 100%);
    overflow: hidden;
}
.photo--dawn .photo-inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        /* branches */
        linear-gradient(85deg, transparent 48%, rgba(60,50,44,0.55) 48.4%, transparent 49%),
        linear-gradient(92deg, transparent 22%, rgba(60,50,44,0.4) 22.3%, transparent 22.7%),
        linear-gradient(78deg, transparent 68%, rgba(60,50,44,0.5) 68.3%, transparent 68.9%),
        linear-gradient(95deg, transparent 82%, rgba(60,50,44,0.35) 82.3%, transparent 82.9%),
        linear-gradient(100deg, transparent 14%, rgba(60,50,44,0.3) 14.3%, transparent 14.8%);
}
.photo--dawn .photo-inner::after {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 42%;
    background: radial-gradient(ellipse at 62% 80%, rgba(232,160,191,0.25), transparent 60%);
}

/* --- morning: fog over field --- */
.photo--morning .photo-inner {
    background:
        linear-gradient(to bottom, #E1DED7 0%, #D4D0C7 45%, #BFB9AE 100%);
}
.photo--morning .photo-inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.55) 45%, rgba(255,255,255,0.15) 100%);
    filter: blur(12px);
}
.photo--morning .photo-inner::after {
    content: "";
    position: absolute;
    bottom: 18%;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(60,50,44,0.2);
    box-shadow:
        0 6px 0 rgba(60,50,44,0.1),
        0 12px 0 rgba(60,50,44,0.05);
}

/* --- midday: high sun, shadow study --- */
.photo--midday .photo-inner {
    background:
        radial-gradient(circle at 70% 20%, #F2EFE8 0%, #E5E0D6 40%, #B4AFA3 100%);
}
.photo--midday .photo-inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(105deg, transparent 30%, rgba(60,50,44,0.18) 30.5%, rgba(60,50,44,0.18) 32%, transparent 32.5%),
        linear-gradient(105deg, transparent 55%, rgba(60,50,44,0.12) 55.5%, rgba(60,50,44,0.12) 58%, transparent 58.5%),
        linear-gradient(105deg, transparent 72%, rgba(60,50,44,0.2) 72.5%, rgba(60,50,44,0.2) 74%, transparent 74.5%);
}

/* --- afternoon: interior, raking light --- */
.photo--afternoon .photo-inner {
    background:
        linear-gradient(115deg, #F0E8D9 0%, #DDD2BE 35%, #8B7D64 100%);
}
.photo--afternoon .photo-inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, rgba(255,236,200,0.55) 0%, transparent 35%),
        repeating-linear-gradient(115deg, transparent 0, transparent 60px, rgba(60,50,44,0.08) 60px, rgba(60,50,44,0.08) 61px);
}

/* --- dusk: last light, urban --- */
.photo--dusk .photo-inner {
    background:
        linear-gradient(to top, #3A3944 0%, #595061 30%, #9C7C89 60%, #D4A29A 85%, #E8BFA1 100%);
}
.photo--dusk .photo-inner::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0; right: 0;
    height: 30%;
    background:
        linear-gradient(to top, rgba(30,28,34,0.85), transparent),
        repeating-linear-gradient(90deg, transparent 0, transparent 28px, rgba(20,18,22,0.8) 28px, rgba(20,18,22,0.8) 40px);
}
.photo--dusk .photo-inner::after {
    content: "";
    position: absolute;
    bottom: 22%;
    left: 18%;
    width: 3px; height: 3px;
    border-radius: 50%;
    background: #F5D78C;
    box-shadow:
        120px 0 0 #F5D78C,
        240px -10px 0 #F5D78C,
        360px 5px 0 #F5D78C,
        60px 20px 0 #E8C07A,
        420px 12px 0 #E8C07A,
        0 0 12px 2px rgba(245,215,140,0.6),
        120px 0 12px 2px rgba(245,215,140,0.6);
}

/* --- evening: window reflection, warm interior --- */
.photo--evening .photo-inner {
    background:
        linear-gradient(to right, #1E1B20 0%, #2E2A30 40%, #58494A 100%);
}
.photo--evening .photo-inner::before {
    content: "";
    position: absolute;
    inset: 10% 10% 10% 45%;
    background:
        radial-gradient(ellipse at 40% 50%, rgba(245,215,140,0.6) 0%, rgba(245,180,120,0.2) 40%, transparent 70%);
    filter: blur(8px);
}
.photo--evening .photo-inner::after {
    content: "";
    position: absolute;
    top: 20%; left: 48%;
    width: 32%; height: 60%;
    border: 1px solid rgba(245,215,140,0.15);
    background:
        linear-gradient(135deg, rgba(245,215,140,0.12), transparent 60%);
}

/* --- night: long-exposure sky --- */
.photo--night .photo-inner {
    background:
        radial-gradient(ellipse at 50% 60%, #1A1920 0%, #0A0A10 70%);
}
.photo--night .photo-inner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 12% 18%, #fff 0.8px, transparent 1.6px),
        radial-gradient(circle at 28% 42%, #fff 0.6px, transparent 1.2px),
        radial-gradient(circle at 55% 15%, #fff 1px, transparent 2px),
        radial-gradient(circle at 72% 38%, #fff 0.7px, transparent 1.4px),
        radial-gradient(circle at 85% 20%, #fff 0.5px, transparent 1.2px),
        radial-gradient(circle at 42% 68%, #fff 0.6px, transparent 1.2px),
        radial-gradient(circle at 66% 78%, #fff 0.8px, transparent 1.6px),
        radial-gradient(circle at 18% 82%, #fff 0.5px, transparent 1px),
        radial-gradient(circle at 92% 62%, #fff 0.7px, transparent 1.4px),
        radial-gradient(circle at 38% 28%, #fff 0.4px, transparent 0.8px);
    opacity: 0.9;
}
.photo--night .photo-inner::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0; right: 0;
    height: 25%;
    background: linear-gradient(to top, #05050A, transparent);
}

.chapter-figure figcaption {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-top: 10px;
    color: var(--slate);
    opacity: 0.8;
    flex-wrap: wrap;
}

/* ============================================================
   CHAPTER ANNOTATION (botanical SVG + label)
   ============================================================ */
.chapter-annotation {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 8px;
    color: var(--hud-line);
    opacity: 0.8;
}
.chapter-annotation .botanical {
    color: var(--hud-line-dk);
    opacity: 0.85;
}
.botanical-path {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 1.6s ease 0.6s;
}
.chapter.is-awake .botanical-path {
    stroke-dashoffset: 0;
}
.chapter-annotation p { color: var(--slate); }

/* Night chapter inverts ink */
.chapter--night {
    color: var(--ink-inv);
}
.chapter--night .chapter-title,
.chapter--night .chapter-body {
    color: var(--ink-inv);
}

/* ============================================================
   EPILOGUE
   ============================================================ */
.chapter--epilogue {
    min-height: 80vh;
    padding: 60px 0 140px;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.15;
    transform: scale(0.97);
}
.chapter--epilogue.is-awake {
    opacity: 1;
    transform: scale(1);
}
.epilogue {
    text-align: center;
    max-width: 640px;
    color: inherit;
}
.epilogue-title {
    font-family: var(--f-disp);
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.4rem);
    letter-spacing: 0.08em;
    margin-bottom: 40px;
    color: inherit;
}
.epilogue-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 32px;
    margin: 32px auto 48px;
    max-width: 420px;
    text-align: left;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--slate);
}
.epilogue-meta > div {
    padding: 10px 0;
    border-top: 1px solid var(--divider);
}
.epilogue-sig {
    margin-top: 48px;
    color: var(--slate);
}
.sig-line {
    width: 48px;
    height: 1px;
    background: var(--divider);
    margin: 0 auto 18px;
}

/* ============================================================
   DARK-PHASE INVERSIONS
   ============================================================ */
body.phase-late {
    --page-bg: var(--bg-night);
    --page-ink: var(--ink-inv);
    --page-hud: var(--hud-line-dk);
}
body.phase-late .interval-glyph {
    background: var(--bg-night);
}
body.phase-late .prologue-stamp,
body.phase-late .chapter-meta,
body.phase-late .epilogue-meta > div {
    border-color: rgba(255,255,255,0.08);
}
body.phase-late .photo {
    background: #1a1a1e;
}
body.phase-late ::selection {
    background: var(--glitch-lav);
    color: var(--ink);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 720px) {
    :root { font-size: 15px; }
    .hud-meta--tr { top: 70px; right: 20px; font-size: 9px; }
    .hud-compass { bottom: 18px; left: 18px; gap: 8px; }
    .hud-compass svg { width: 28px; height: 28px; }
    .hud-frameindex { bottom: 20px; font-size: 9px; }
    .hud-timestamp { font-size: 9.5px; gap: 6px; }
    .hud-progress { right: 10px; top: 100px; bottom: 100px; }
    .chapter { padding: 80px 0 40px; }
    .chapter-inner { gap: 32px; }
    .chapter-title-wrap { gap: 12px; }
    .chapter-figure--wide,
    .chapter-figure--full {
        margin-left: 0; margin-right: 0;
    }
    .interval { height: 40vh; }
    .epilogue-meta { grid-template-columns: 1fr; }
}