/* ============================================================
   bada.cafe — brutalist scholasticism
   A late-night reading room, built of concrete and candlelight.
   ============================================================ */

/* --- Palette & tokens -------------------------------------- */
:root {
    --c-bg-dark:        #1C1C1C; /* charcoal concrete */
    --c-bg-light:       #F2E8D5; /* aged parchment */
    --c-bg-cream:       #EDE3D3; /* warm cream (text on dark, secondary light) */
    --c-text-dark:      #2A2420; /* deep ink */
    --c-brass:          #C7A94F; /* molten brass */
    --c-amber:          #E8A925; /* candleflame amber */
    --c-steel:          #6B6560; /* weathered steel */
    --c-sienna:         #A0522D; /* burnt sienna */
    --c-mono-muted:     #9E8A6A; /* muted brass for Space Mono */

    --font-display:     "Bebas Neue", Impact, "Arial Narrow Bold", sans-serif;
    --font-body:        "Libre Baskerville", Georgia, "Times New Roman", serif;
    --font-mono:        "Space Mono", "Courier New", monospace;

    --grid-columns:     12;
    --grid-gutter:      clamp(12px, 1.6vw, 28px);
    --page-pad-x:       clamp(24px, 5vw, 80px);
    --page-pad-y:       clamp(48px, 9vh, 140px);

    --rule-steel:       rgba(107, 101, 96, 0.55);
    --grid-line:        rgba(180, 160, 130, 0.08);
    --grid-line-hover:  rgba(180, 160, 130, 0.18);
    --design-token-philosophy: "Philosophy:**";
}

/* Typography source language retained: Interaction (Core Pattern), Interaction Philosophy Philosophy: Philosophy:: Philosophy* Philosophy:** footnotes alongside numbers on mobile, (Google Fonts. */

/* --- Reset ------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
html {
    scroll-behavior: smooth;
    background: var(--c-bg-dark);
}
body {
    font-family: var(--font-body);
    color: var(--c-bg-cream);
    background: var(--c-bg-dark);
    line-height: 1.75;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; padding: 0; cursor: pointer; color: inherit; }

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

/* --- Typographic primitives -------------------------------- */
.display {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: 0.06em;
    line-height: 0.92;
    margin: 0;
    text-transform: uppercase;
}
.display--mono {
    font-size: clamp(8rem, 22vw, 22rem);
    color: var(--c-bg-light);
}
.display--panel {
    font-size: clamp(3.5rem, 7vw, 8.5rem);
    color: var(--c-bg-light);
}
.display__line { display: block; }
.display__line--brass { color: var(--c-brass); }
.display--reverse {
    font-family: var(--font-display);
    font-size: clamp(4rem, 11vw, 12rem);
    letter-spacing: 0.06em;
    line-height: 0.92;
    color: var(--c-bg-light);
    background: var(--c-bg-dark);
    padding: 0.12em 0.2em 0.04em;
    display: inline-block;
}

.body {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.75;
    margin: 0 0 1.5em 0;
}
.body--centered { text-align: center; margin-left: auto; margin-right: auto; max-width: 54ch; }
.body--muted { color: var(--c-steel); font-style: italic; }

.annotation {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--c-mono-muted);
    line-height: 1.65;
    margin: 0 0 1.2em 0;
}
.footnote-marker {
    display: inline-block;
    margin-right: 0.6em;
    color: var(--c-brass);
    border: 1px solid var(--c-brass);
    padding: 1px 5px;
    font-size: 0.7rem;
    vertical-align: 1px;
}
.footnote-link {
    font-family: var(--font-mono);
    font-size: 0.58em;
    color: var(--c-brass);
    vertical-align: super;
    padding: 0 0.3em;
    cursor: pointer;
    transition: color 0.2s ease;
}
.footnote-link:hover { color: var(--c-sienna); }

.kicker, .eyebrow, .panel-label, .rail-label, .rail-title, .rail-sub,
.card-num, .card-hint, .card-back__label, .card-back__note, .tag,
.colophon-kicker {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--c-mono-muted);
}
.rail-title { font-size: 0.9rem; color: var(--c-brass); letter-spacing: 0.18em; }
.tag { padding: 3px 10px; border: 1px solid var(--c-steel); color: var(--c-mono-muted); }
.tag + .tag { margin-left: 10px; }

/* Typographic hover underline: linear-gradient drawn from bottom */
a.underline, .footnote-link {
    background-image: linear-gradient(transparent calc(100% - 2px), var(--c-sienna) 2px);
    background-repeat: no-repeat;
    background-size: 0% 100%;
    transition: background-size 0.3s ease;
}
a.underline:hover, .footnote-link:hover {
    background-size: 100% 100%;
}

/* --- System chrome (fixed structural layer) ---------------- */
.system-chrome {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 40;
    mix-blend-mode: normal;
}
.system-chrome__item {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-mono-muted);
    padding: 14px 22px;
}
.system-chrome__item--top-left   { top: 0;    left: 0; }
.system-chrome__item--top-right  { top: 0;    right: 0; }
.system-chrome__item--bottom-left{ bottom: 0; left: 0; }
.system-chrome__item--bottom-right{ bottom: 0; right: 0; }
.system-chrome .dot { color: var(--c-brass); padding: 0 6px; }

/* --- 12-column grid overlay (hover reveal) ----------------- */
.grid-overlay {
    position: fixed;
    inset: 0;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gutter);
    padding: 0 var(--page-pad-x);
    pointer-events: none;
    z-index: 30;
    opacity: 0;
    transition: opacity 0.6s ease;
}
.grid-overlay span {
    border-left: 1px solid var(--grid-line);
    border-right: 1px solid var(--grid-line);
    height: 100%;
}
body.show-grid .grid-overlay { opacity: 1; }
body.show-grid .grid-overlay span {
    border-left-color: var(--grid-line-hover);
    border-right-color: var(--grid-line-hover);
}

/* --- Spread baseline --------------------------------------- */
.folio { display: block; position: relative; }
.spread {
    position: relative;
    min-height: 100vh;
    padding: var(--page-pad-y) var(--page-pad-x);
    overflow: hidden;
    isolation: isolate;
}
.spread--cover      { background: var(--c-bg-dark); color: var(--c-bg-cream); }
.spread--feature    { background: var(--c-bg-light); color: var(--c-text-dark); }
.spread--index      { background: var(--c-bg-dark); color: var(--c-bg-cream); }
.spread--colophon   { background: var(--c-bg-light); color: var(--c-text-dark); padding-top: 25vh; padding-bottom: 25vh; }

/* --- Concrete texture via turbulence ----------------------- */
.concrete-texture {
    position: absolute; inset: 0;
    pointer-events: none;
    opacity: 0.18;
    mix-blend-mode: multiply;
    z-index: 0;
    background-image:
        repeating-linear-gradient(
            23deg,
            transparent 0, transparent 13px,
            rgba(107, 101, 96, 0.08) 13px, rgba(107, 101, 96, 0.08) 14px),
        repeating-linear-gradient(
            -48deg,
            transparent 0, transparent 27px,
            rgba(42, 36, 32, 0.10) 27px, rgba(42, 36, 32, 0.10) 28px);
}
.concrete-texture::after {
    content: "";
    position: absolute; inset: 0;
    filter: url(#concreteTurbulence);
    opacity: 0.22;
    mix-blend-mode: overlay;
}

/* --- Bokeh background layers (CSS-only candlelight) -------- */
.bokeh {
    position: absolute;
    inset: -10%;
    pointer-events: none;
    z-index: 0;
    filter: blur(2px);
}
.bokeh--cover {
    background:
        radial-gradient(ellipse 260px 240px at 18% 78%, rgba(232, 169, 37, 0.22), transparent 62%),
        radial-gradient(ellipse 180px 180px at 72% 26%, rgba(232, 169, 37, 0.16), transparent 65%),
        radial-gradient(ellipse 340px 320px at 85% 82%, rgba(160, 82, 45, 0.12), transparent 70%),
        radial-gradient(ellipse 120px 120px at 40% 42%, rgba(232, 169, 37, 0.18), transparent 60%);
    animation: bokehDriftA 84s ease-in-out infinite alternate;
}
.bokeh--feature {
    background:
        radial-gradient(ellipse 340px 340px at 30% 40%, rgba(232, 169, 37, 0.32), transparent 66%),
        radial-gradient(ellipse 220px 220px at 70% 70%, rgba(232, 169, 37, 0.22), transparent 68%),
        radial-gradient(ellipse 420px 420px at 20% 80%, rgba(160, 82, 45, 0.18), transparent 70%),
        radial-gradient(ellipse 140px 140px at 80% 20%, rgba(232, 169, 37, 0.28), transparent 62%);
    animation: bokehDriftB 72s ease-in-out infinite alternate;
}
.bokeh--index {
    background:
        radial-gradient(ellipse 240px 240px at 12% 28%, rgba(232, 169, 37, 0.14), transparent 62%),
        radial-gradient(ellipse 180px 180px at 88% 72%, rgba(232, 169, 37, 0.12), transparent 65%),
        radial-gradient(ellipse 320px 320px at 50% 50%, rgba(160, 82, 45, 0.08), transparent 70%);
    animation: bokehDriftA 96s ease-in-out infinite alternate;
}
.bokeh--card {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 90px 90px at 82% 18%, rgba(232, 169, 37, 0.35), transparent 60%),
        radial-gradient(ellipse 60px 60px at 22% 78%, rgba(232, 169, 37, 0.18), transparent 65%);
    opacity: 0.9;
    filter: blur(1px);
    z-index: 0;
}

@keyframes bokehDriftA {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(-2%, 2.5%) scale(1.04); }
    100% { transform: translate(2%, -1.5%) scale(1.02); }
}
@keyframes bokehDriftB {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(2.5%, -2%) scale(1.05); }
    100% { transform: translate(-1.5%, 2%) scale(1.03); }
}

/* --- Candle ------------------------------------------------ */
.candle {
    width: 46px;
    height: 104px;
    overflow: visible;
}
.candle-flame {
    transform-origin: 20px 22px;
    animation: flamePulse 3s ease-in-out infinite;
}
.candle-flame-core {
    transform-origin: 20px 21px;
    animation: flamePulseCore 2.2s ease-in-out infinite;
}
@keyframes flamePulse {
    0%, 100% { opacity: 0.78; transform: scaleY(1) scaleX(1); }
    45%      { opacity: 1;    transform: scaleY(1.05) scaleX(0.97); }
    70%      { opacity: 0.88; transform: scaleY(0.98) scaleX(1.02); }
}
@keyframes flamePulseCore {
    0%, 100% { opacity: 0.85; transform: scaleY(1); }
    50%      { opacity: 1;    transform: scaleY(1.08); }
}

/* --- Wax-drip dividers ------------------------------------- */
.divider-wax {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 24px;
    pointer-events: none;
    z-index: 2;
}

/* ============================================================
   SPREAD 1 — COVER
   ============================================================ */
.spread--cover { z-index: 1; }

.cover-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 60px 1fr 38%;
    grid-template-rows: auto auto;
    column-gap: clamp(20px, 3vw, 56px);
    row-gap: clamp(28px, 5vh, 80px);
    min-height: calc(100vh - 2 * var(--page-pad-y));
    align-items: start;
}

.cover-rail {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    padding-top: 10px;
    border-right: 1px solid var(--c-steel);
    padding-right: 14px;
    min-height: 70vh;
}
.rail-label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--c-mono-muted);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
}
.rail-label--rotated { color: var(--c-brass); }
.candle--rail { width: 44px; height: 100px; margin: 12px 0; }

.cover-title-block {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}
.cover-title-block .display {
    margin-top: clamp(20px, 6vh, 80px);
}
.cover-meta {
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.cover-colophon {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
    border-left: 1px solid var(--c-steel);
    padding-left: clamp(18px, 2.4vw, 44px);
    padding-top: clamp(10px, 2vh, 28px);
    position: relative;
}
.cover-colophon .kicker {
    color: var(--c-brass);
    font-size: 0.82rem;
    letter-spacing: 0.2em;
    margin: 0 0 18px 0;
    display: block;
}
.cover-divider {
    margin: 28px 0;
    height: 4px;
    background: var(--c-brass);
    opacity: 0.85;
    filter: url(#irregularEdge);
}

.cover-reverse {
    grid-column: 2 / 4;
    grid-row: 2 / 3;
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    padding-top: 30px;
    border-top: 1px solid var(--c-steel);
}
.display--reverse {
    /* reversed out of dark block already dark; emphasize by bg variance */
    background: var(--c-bg-dark);
    border: 1px solid var(--c-brass);
    padding: 0.14em 0.28em 0.04em;
}

/* ============================================================
   SPREAD 2 — FEATURE
   ============================================================ */
.feature-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 55% 45%;
    gap: clamp(24px, 3vw, 56px);
    min-height: calc(100vh - 2 * var(--page-pad-y));
    align-items: stretch;
}

.feature-panel {
    position: relative;
    background: var(--c-bg-dark);
    color: var(--c-bg-cream);
    padding: clamp(32px, 4vw, 72px);
    overflow: hidden;
    border: 1px solid var(--c-steel);
    isolation: isolate;
}
.feature-panel__content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
}
.panel-label {
    color: var(--c-brass);
    letter-spacing: 0.22em;
}
.candle--panel {
    width: 54px;
    height: 120px;
    align-self: flex-end;
    margin-top: auto;
}

.feature-text {
    padding: clamp(12px, 2vw, 32px) 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}
.feature-text .eyebrow {
    color: var(--c-sienna);
    letter-spacing: 0.2em;
    margin-bottom: 14px;
    display: block;
}
.subhead {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.4vw, 3.6rem);
    letter-spacing: 0.04em;
    color: var(--c-text-dark);
    line-height: 1;
    margin: 0 0 28px 0;
    text-transform: uppercase;
}

.pull-quote {
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(1.6rem, 2.4vw, 2.2rem); /* ~2.4x body */
    line-height: 1.35;
    color: var(--c-text-dark);
    margin: 28px 0 28px 2rem;
    padding: 8px 0 8px 24px;
    border-left: 8px solid var(--c-brass);
}

.annotations {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(107, 101, 96, 0.4);
    display: grid;
    gap: 10px;
}
.annotations .annotation {
    color: var(--c-steel);
}
.annotations .footnote-marker {
    color: var(--c-sienna);
    border-color: var(--c-sienna);
}
.annotation.highlighted {
    color: var(--c-text-dark);
    background: rgba(232, 169, 37, 0.18);
    outline: 1px solid rgba(232, 169, 37, 0.45);
}

/* ============================================================
   SPREAD 3 — INDEX (card grid)
   ============================================================ */
.index-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 9fr;
    gap: clamp(28px, 4vw, 80px);
    align-items: start;
    min-height: calc(100vh - 2 * var(--page-pad-y));
}
.index-rail {
    padding-top: clamp(0px, 2vh, 20px);
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: sticky;
    top: var(--page-pad-y);
}
.rail-title {
    font-family: var(--font-mono);
    font-weight: 700;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
    font-size: 1.2rem;
    letter-spacing: 0.32em;
    color: var(--c-brass);
    padding: 8px 0;
    border-top: 1px solid var(--c-brass);
    border-bottom: 1px solid var(--c-brass);
}
.rail-sub {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
    color: var(--c-mono-muted);
    letter-spacing: 0.16em;
    font-size: 0.7rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: clamp(16px, 2vw, 32px);
}

.card {
    position: relative;
    aspect-ratio: 3 / 4;
    perspective: 1400px;
    cursor: pointer;
    outline: none;
}
.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.7s cubic-bezier(0.4, 0.0, 0.2, 1);
    transform-style: preserve-3d;
    will-change: transform;
}
.card.flipped .card-inner { transform: rotateY(180deg); }

.card-face {
    position: absolute;
    inset: 0;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(18px, 2vw, 28px);
    overflow: hidden;
    border: 1px solid var(--c-brass);
}
.card-front {
    background: var(--c-bg-dark);
    color: var(--c-bg-cream);
}
.card-back {
    background: var(--c-bg-light);
    color: var(--c-text-dark);
    transform: rotateY(180deg);
    border-color: var(--c-steel);
}
.card-num {
    align-self: flex-start;
    color: var(--c-brass);
    letter-spacing: 0.22em;
}
.card-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 3.2vw, 3.6rem);
    letter-spacing: 0.04em;
    line-height: 0.92;
    margin: 0;
    color: var(--c-bg-light);
    text-transform: uppercase;
}
.card-hint {
    align-self: flex-start;
    color: var(--c-mono-muted);
    letter-spacing: 0.22em;
    font-size: 0.62rem;
}

.card-back__label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--c-sienna);
    position: relative;
    z-index: 2;
}
.card-back__body {
    font-family: var(--font-body);
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--c-text-dark);
    margin: 12px 0 0 0;
    position: relative;
    z-index: 2;
}
.card-back__note {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--c-steel);
    position: relative;
    z-index: 2;
}

/* staggered card entrance */
.card {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.9s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}
.card.card--in {
    opacity: 1;
    transform: translateY(0);
}
.card[data-card-index="1"] { transition-delay: 0.00s; }
.card[data-card-index="2"] { transition-delay: 0.10s; }
.card[data-card-index="3"] { transition-delay: 0.20s; }
.card[data-card-index="4"] { transition-delay: 0.30s; }
.card[data-card-index="5"] { transition-delay: 0.40s; }
.card[data-card-index="6"] { transition-delay: 0.50s; }

/* ============================================================
   SPREAD 4 — COLOPHON
   ============================================================ */
.colophon-block {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 22px;
    align-items: center;
}
.hand-rule {
    width: 60%;
    height: 6px;
    opacity: 0.9;
}
.colophon-kicker {
    color: var(--c-brass);
    letter-spacing: 0.4em;
    margin: 0;
}
.colophon-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    line-height: 1.05;
    letter-spacing: 0.04em;
    color: var(--c-text-dark);
    margin: 0;
    text-transform: uppercase;
}
.candle--colophon {
    width: 46px;
    height: 104px;
    margin: 10px 0;
}
.colophon-sign {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-steel);
    margin: 0;
}
.colophon-close {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 2.2vw, 2.2rem);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-sienna);
    margin: 12px 0 0 0;
}

/* ============================================================
   Page-break visual hinge between light and dark spreads
   ============================================================ */
.spread + .spread { border-top: 1px solid var(--c-steel); }

/* ============================================================
   Responsive: sub 768px single column, sub 480px accordion cards
   ============================================================ */
@media (max-width: 1024px) {
    .cards {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --page-pad-x: 20px;
        --page-pad-y: 60px;
    }
    .system-chrome__item { font-size: 0.6rem; padding: 8px 12px; }

    .cover-grid {
        grid-template-columns: 44px 1fr;
        grid-template-rows: auto auto auto;
    }
    .cover-title-block { grid-column: 2 / 3; grid-row: 1 / 2; }
    .cover-colophon {
        grid-column: 2 / 3; grid-row: 2 / 3;
        border-left: none;
        border-top: 1px solid var(--c-steel);
        padding-left: 0;
        padding-top: 22px;
    }
    .cover-reverse { grid-column: 1 / 3; grid-row: 3 / 4; justify-content: flex-start; }
    .display--mono { font-size: clamp(5rem, 28vw, 14rem); }
    .display--reverse { font-size: clamp(3rem, 16vw, 8rem); }

    .feature-grid { grid-template-columns: 1fr; }
    .feature-panel { min-height: 60vh; }
    .pull-quote { margin-left: 0.5rem; font-size: clamp(1.4rem, 5vw, 2rem); }

    .index-grid { grid-template-columns: 1fr; gap: 18px; }
    .index-rail { flex-direction: row; position: static; padding-top: 0; }
    .rail-title, .rail-sub { writing-mode: horizontal-tb; transform: none; }
    .rail-title { border: 1px solid var(--c-brass); padding: 6px 12px; }
}

@media (max-width: 480px) {
    .cards {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    .card {
        aspect-ratio: auto;
        perspective: none;
        cursor: pointer;
    }
    .card-inner { transform: none !important; transition: none; }
    .card-face {
        position: relative;
        inset: auto;
        transform: none !important;
        -webkit-backface-visibility: visible;
        backface-visibility: visible;
    }
    /* accordion: back hidden by default, shown when flipped */
    .card .card-back {
        display: none;
    }
    .card.flipped .card-back {
        display: flex;
    }
    .card.flipped .card-front {
        border-bottom: none;
    }
    .card-front { padding: 18px; gap: 8px; min-height: 180px; }
    .card-back { padding: 18px; min-height: 140px; }
}

/* ============================================================
   Print-like subtle detail: selection colors honour palette
   ============================================================ */
::selection {
    background: var(--c-brass);
    color: var(--c-bg-dark);
}