/* =====================================================
   MMIDDL.ai — vol. iii, spring of the long middle
   muji-quiet warm retro-futuristic catalog of cards
   ===================================================== */

:root {
    /* palette — retro-futuristic warm-quiet (8 colors) */
    --c-unbleached: #F4ECE0;     /* primary canvas */
    --c-paper-shadow: #E8DCC8;   /* secondary surface */
    --c-terracotta: #C97B5A;     /* primary accent */
    --c-casio-teal: #7DA8A4;     /* secondary accent */
    --c-ink-brown: #3A312A;      /* primary type — NOT pure black */
    --c-linen-taupe: #A89580;    /* hairline rules, supporting tones */
    --c-honey-leaf: #D4A574;     /* leaf-glyph color */
    --c-brewed-umber: #8C5A3C;   /* deep accent, tier headings */

    /* typography */
    --f-display: "Libre Baskerville", "Iowan Old Style", Palatino, serif;
    --f-margin: "Cormorant Infant", "Iowan Old Style", Palatino, serif;
    --f-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

    /* sizing */
    --page-margin: 8%;
    --gutter: 32px;
    --baseline: 24px;
    --radius: 6px;
    --keyline: var(--c-linen-taupe);

    /* easing */
    --ease-sine: cubic-bezier(.4,.0,.2,1);
    --ease-soft: cubic-bezier(.2,.8,.2,1);

    /* shadow — paper on paper, never on void */
    --paper-shadow: 0 6px 14px -8px rgba(58,49,42,0.18);
    --paper-shadow-hover: 0 10px 22px -10px rgba(58,49,42,0.24);
}

* { box-sizing: border-box; }

html {
    color-scheme: light;
    background: var(--c-unbleached);
    font-size: 17px;
    -webkit-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--f-display);
    font-weight: 400;
    color: var(--c-ink-brown);
    line-height: 1.62;
    background: var(--c-unbleached);
    background-image:
        radial-gradient(ellipse at 18% 14%, rgba(201,123,90,0.10) 0%, transparent 42%),
        radial-gradient(ellipse at 84% 12%, rgba(125,168,164,0.08) 0%, transparent 48%),
        radial-gradient(ellipse at 50% 70%, rgba(232,220,200,0.4) 0%, transparent 60%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* slow 120s gradient drift — atmosphere, not motion */
body::before {
    content: "";
    position: fixed;
    inset: -10%;
    z-index: -1;
    background:
        radial-gradient(ellipse at 22% 20%, rgba(201,123,90,0.06) 0%, transparent 45%),
        radial-gradient(ellipse at 78% 80%, rgba(125,168,164,0.05) 0%, transparent 50%);
    pointer-events: none;
    animation: drift 120s linear infinite;
    will-change: transform;
}

@keyframes drift {
    0%   { transform: translate(0, 0) rotate(0deg); }
    50%  { transform: translate(-2%, 1.5%) rotate(0.2deg); }
    100% { transform: translate(0, 0) rotate(0deg); }
}

/* very fine paper-fiber overlay — site-wide substrate */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        repeating-linear-gradient(
            27deg,
            transparent 0 3px,
            rgba(58,49,42,0.012) 3px 4px
        ),
        repeating-linear-gradient(
            117deg,
            transparent 0 3px,
            rgba(58,49,42,0.012) 3px 4px
        );
    pointer-events: none;
}

/* ===================================================== */
/* LAYOUT — main catalog                                 */
/* ===================================================== */

.catalog {
    padding: calc(var(--baseline) * 4) var(--page-margin) calc(var(--baseline) * 6);
    max-width: 1640px;
    margin: 0 auto;
}

.tier {
    margin-bottom: 96px;
}

.tier:last-child { margin-bottom: 0; }

.tier-heading {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: 36px;
    line-height: 1.2;
    color: var(--c-brewed-umber);
    text-transform: lowercase;
    font-variant: small-caps;
    letter-spacing: 0.04em;
    margin: 0 0 calc(var(--baseline) * 1.5);
    padding-left: 4px;
}

.visually-quiet {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}

/* 12-column grid */
.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
}

/* tier rule — 96px gap with hairline broken by leaf */
.tier-rule {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    margin-top: 72px;
    margin-bottom: -24px;
    opacity: 0.85;
}

.rule-line {
    flex: 0 1 38%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--c-linen-taupe) 18%, var(--c-linen-taupe) 82%, transparent);
}

.leaf-bamboo {
    stroke: var(--c-honey-leaf);
    stroke-width: 0.8;
    fill: none;
    transform: rotate(-12deg);
}

/* ===================================================== */
/* CARD — shared                                         */
/* ===================================================== */

.card {
    position: relative;
    border-radius: var(--radius);
    background: var(--c-unbleached);
    box-shadow: var(--paper-shadow);
    overflow: hidden;
    isolation: isolate;
    border: 0.5px solid rgba(168,149,128,0.32);
    transition: box-shadow 380ms var(--ease-sine), transform 480ms var(--ease-sine);
    min-height: calc(var(--baseline) * 7);
}

.card-mesh {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.card-fiber {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.03;
    background-image:
        repeating-linear-gradient(45deg, var(--c-ink-brown) 0 0.5px, transparent 0.5px 4px),
        repeating-linear-gradient(135deg, var(--c-ink-brown) 0 0.5px, transparent 0.5px 4px);
    background-size: 88px 88px;
    transition: opacity 360ms var(--ease-sine);
}

.card:hover .card-fiber {
    opacity: 0.044;
}

.card > *:not(.card-mesh):not(.card-fiber):not(.card-border-path):not(.card-corner-peel) {
    position: relative;
    z-index: 2;
}

.card-index {
    display: inline-block;
    position: absolute;
    top: 14px;
    right: 16px;
    font-family: var(--f-mono);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: var(--c-linen-taupe);
    z-index: 3;
}

.back-index {
    color: var(--c-linen-taupe);
}

.card-domain {
    position: absolute;
    top: 14px;
    left: 18px;
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 14px;
    color: var(--c-linen-taupe);
    letter-spacing: 0.01em;
    z-index: 3;
}

/* card span helpers (12-col grid) */
.card-span-1 { grid-column: span 1; }
.card-span-2 { grid-column: span 2; }
.card-span-3 { grid-column: span 3; }
.card-span-4 { grid-column: span 4; }
.card-span-5 { grid-column: span 5; }
.card-span-7 { grid-column: span 7; }
.card-span-12 { grid-column: span 12; }

/* ===================================================== */
/* TIER I — THRESHOLD                                    */
/* ===================================================== */

.card-threshold {
    grid-column: span 12;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--baseline) * 3) calc(var(--baseline) * 2);
    text-align: center;
    border: 0.5px solid rgba(168,149,128,0.42);
}

.mesh-tier-i {
    background:
        radial-gradient(ellipse 60% 50% at 18% 14%, rgba(201,123,90,0.18), transparent 70%),
        radial-gradient(ellipse 70% 50% at 78% 22%, rgba(212,165,116,0.10) 0%, transparent 60%),
        radial-gradient(ellipse 80% 60% at 50% 70%, rgba(232,220,200,0.6) 0%, transparent 70%),
        linear-gradient(to bottom right, var(--c-unbleached), var(--c-paper-shadow));
}

.card-margin-leaf {
    position: absolute;
    top: 28px;
    left: 30px;
    z-index: 3;
    transform-origin: 50% 80%;
    transition: transform 720ms var(--ease-sine);
}

.card-margin-leaf .leaf-ginkgo {
    fill: none;
    stroke: var(--c-honey-leaf);
    stroke-width: 0.8;
    opacity: 0.85;
}

.card-margin-leaf.flutter {
    animation: leaf-flutter 1100ms var(--ease-sine);
}

@keyframes leaf-flutter {
    0%   { transform: rotate(0deg); }
    35%  { transform: rotate(14deg); }
    70%  { transform: rotate(-4deg); }
    100% { transform: rotate(0deg); }
}

.card-keyline {
    position: absolute;
    inset: 18px;
    border: 1px solid rgba(168,149,128,0.22);
    border-radius: calc(var(--radius) - 2px);
    pointer-events: none;
    z-index: 1;
}

.threshold-word {
    font-family: var(--f-display);
    font-style: italic;
    font-weight: 400;
    font-size: 11vw;
    line-height: 1;
    letter-spacing: -0.005em;
    color: var(--c-ink-brown);
    text-rendering: optimizeLegibility;
    padding: 0;
    margin: 0;
}

.threshold-tag {
    margin-top: calc(var(--baseline) * 2);
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 14px;
    color: var(--c-linen-taupe);
    letter-spacing: 0.02em;
}

/* ===================================================== */
/* TIER II — DEFINITIONS                                 */
/* ===================================================== */

.grid-tier-ii {
    grid-auto-rows: minmax(calc(var(--baseline) * 11), auto);
}

.card-def {
    min-height: calc(var(--baseline) * 11);
    perspective: 1400px;
    background: transparent;
    box-shadow: none;
    border: none;
    overflow: visible;
    opacity: 0;
    transform: translateY(24px);
    animation: card-enter 700ms var(--ease-soft) forwards;
    animation-delay: calc(var(--i, 0) * 80ms + 120ms);
}

@keyframes card-enter {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

.flip-wrap {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: inherit;
    transform-style: preserve-3d;
    transition: transform 720ms var(--ease-sine);
}

.card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background: var(--c-unbleached);
    border-radius: var(--radius);
    box-shadow: var(--paper-shadow);
    border: 0.5px solid rgba(168,149,128,0.32);
    overflow: hidden;
    padding: calc(var(--baseline) * 2) calc(var(--baseline) * 1.25) calc(var(--baseline) * 1.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.card-front { z-index: 2; }
.card-back { transform: rotateY(180deg); }

/* default flip on Y axis for def cards */
.card-flip.flipped .flip-wrap {
    transform: rotateY(180deg);
}

.card-flip.flipping .flip-wrap {
    will-change: transform;
}

.mesh-tier-ii {
    background:
        radial-gradient(ellipse 70% 60% at 30% 30%, rgba(232,220,200,0.6) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(244,236,224,0.8) 0%, transparent 70%),
        var(--c-unbleached);
}

.card-glyph {
    margin-bottom: calc(var(--baseline) * 0.7);
    line-height: 0;
}

.card-glyph svg {
    display: block;
}

.card-word {
    font-family: var(--f-display);
    font-style: italic;
    font-weight: 400;
    font-size: 28px;
    letter-spacing: -0.005em;
    color: var(--c-ink-brown);
    text-align: center;
    margin: 0;
}

.card-def-body {
    font-family: var(--f-display);
    font-size: 17px;
    line-height: 1.62;
    color: var(--c-ink-brown);
    max-width: 56ch;
    margin: 0;
    padding: 0 calc(var(--baseline) * 0.4);
}

.dropcap {
    float: left;
    font-family: var(--f-display);
    font-style: italic;
    font-weight: 400;
    font-size: 4.2em;
    line-height: 0.86;
    padding: 6px 8px 0 0;
    color: var(--c-brewed-umber);
}

.card-back-leaf {
    position: absolute;
    bottom: 18px;
    right: 20px;
    opacity: 0.78;
}

/* ===================================================== */
/* TIER III — THE MIDDLE PATH                            */
/* ===================================================== */

.grid-tier-iii {
    grid-template-columns: repeat(7, 1fr);
    gap: 24px;
    align-items: start;
}

.card-path {
    grid-column: span 1;
    min-height: calc(var(--baseline) * 9);
    padding: calc(var(--baseline) * 2.4) calc(var(--baseline) * 0.9) calc(var(--baseline) * 1.4);
    background: rgba(244,236,224,0.94);
    transform: translateY(var(--jitter, 0));
    opacity: 0;
}

.card-path.revealed {
    animation: path-reveal 900ms var(--ease-soft) forwards;
    animation-delay: calc(var(--i, 0) * 120ms);
}

@keyframes path-reveal {
    0%   { opacity: 0; }
    30%  { opacity: 1; }
    100% { opacity: 1; }
}

.mesh-tier-iii {
    background:
        radial-gradient(ellipse 70% 50% at 20% 20%, rgba(244,236,224,0.8) 0%, transparent 60%),
        radial-gradient(ellipse 80% 60% at 80% 80%, rgba(125,168,164,0.14) 0%, transparent 70%),
        var(--c-unbleached);
}

.card-border-path {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.card-border-path rect {
    fill: none;
    stroke: var(--c-linen-taupe);
    stroke-width: 0.5;
    vector-effect: non-scaling-stroke;
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    rx: 1.5;
    ry: 1.5;
}

.card-path.revealed .card-border-path rect {
    animation: path-draw 600ms var(--ease-sine) forwards;
    animation-delay: calc(var(--i, 0) * 120ms + 120ms);
}

@keyframes path-draw {
    to { stroke-dashoffset: 0; }
}

.path-step {
    font-family: var(--f-display);
    font-style: italic;
    font-size: 19px;
    line-height: 1.32;
    color: var(--c-ink-brown);
    text-align: left;
    margin-top: calc(var(--baseline) * 0.4);
    opacity: 0;
}

.card-path.revealed .path-step {
    animation: type-fade 600ms var(--ease-soft) forwards;
    animation-delay: calc(var(--i, 0) * 120ms + 360ms);
}

.path-margin {
    position: absolute;
    bottom: 14px;
    left: 18px;
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 13px;
    color: var(--c-linen-taupe);
    letter-spacing: 0.02em;
    opacity: 0;
}

.card-path.revealed .path-margin {
    animation: type-fade 600ms var(--ease-soft) forwards;
    animation-delay: calc(var(--i, 0) * 120ms + 500ms);
}

@keyframes type-fade {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ===================================================== */
/* TIER IV — TOOLS                                       */
/* ===================================================== */

.grid-tier-iv {
    grid-auto-rows: minmax(calc(var(--baseline) * 18), auto);
}

.card-tool {
    min-height: calc(var(--baseline) * 18);
    perspective: 1400px;
    background: transparent;
    box-shadow: none;
    border: none;
    overflow: visible;
    cursor: pointer;
}

/* custom leaf cursor for flippable cards */
.card-flip-click {
    cursor: pointer;
}

.card-tool .card-face {
    padding: calc(var(--baseline) * 2.2) calc(var(--baseline) * 1.4);
    align-items: stretch;
    justify-content: flex-start;
}

.card-tool .card-front {
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: calc(var(--baseline) * 0.7);
}

.mesh-tier-iv {
    background:
        radial-gradient(ellipse 60% 50% at 50% 50%, rgba(201,123,90,0.13) 0%, transparent 70%),
        radial-gradient(ellipse 80% 60% at 12% 88%, rgba(244,236,224,0.7) 0%, transparent 60%),
        var(--c-unbleached);
}

.tool-glyph {
    margin: 0 auto calc(var(--baseline) * 0.4);
    line-height: 0;
}

.tool-title {
    font-family: var(--f-display);
    font-style: italic;
    font-size: 26px;
    color: var(--c-ink-brown);
    margin: 0;
    letter-spacing: -0.005em;
    line-height: 1.18;
}

.tool-sub {
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 15px;
    color: var(--c-linen-taupe);
    margin: 0;
}

.card-flip-hint {
    margin-top: calc(var(--baseline) * 0.8);
    font-family: var(--f-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--c-brewed-umber);
    opacity: 0.78;
}

.card-corner-peel {
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 30px;
    z-index: 5;
    pointer-events: none;
    transform-origin: 100% 0;
    transition: transform 420ms var(--ease-sine), width 420ms var(--ease-sine), height 420ms var(--ease-sine);
    filter: drop-shadow(0 1px 1px rgba(58,49,42,0.18));
}

.card-tool:hover .card-corner-peel {
    width: 38px;
    height: 38px;
}

.tool-body {
    display: flex;
    flex-direction: column;
    gap: calc(var(--baseline) * 0.6);
    width: 100%;
    max-width: 92%;
    margin: 0 auto;
}

.tool-label {
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 14px;
    color: var(--c-linen-taupe);
    letter-spacing: 0.02em;
}

.tool-input,
.tool-textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--c-linen-taupe);
    border-radius: 0;
    padding: 8px 2px;
    font-family: var(--f-display);
    font-size: 17px;
    color: var(--c-ink-brown);
    outline: none;
    transition: border-color 320ms var(--ease-sine);
}

.tool-input::placeholder,
.tool-textarea::placeholder {
    color: rgba(168,149,128,0.7);
    font-style: italic;
}

.tool-input:focus,
.tool-textarea:focus {
    border-bottom-color: var(--c-terracotta);
}

.tool-textarea {
    resize: vertical;
    min-height: 78px;
    line-height: 1.5;
    font-size: 15px;
}

.tool-input-mono {
    font-family: var(--f-mono);
    font-size: 14px;
    letter-spacing: 0.04em;
}

.midpoint-row {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    gap: 10px;
    align-items: center;
}

.tool-row-leaf {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-height: 36px;
    margin-top: 6px;
}

.leaf-submit {
    background: transparent;
    border: none;
    padding: 4px;
    cursor: pointer;
    transition: transform 280ms var(--ease-sine);
}

.leaf-submit:hover {
    transform: rotate(-6deg);
}

.leaf-submit .leaf-camellia path {
    transition: fill 320ms var(--ease-sine), stroke 320ms var(--ease-sine);
}

.leaf-submit.complete .leaf-camellia path {
    fill: var(--c-honey-leaf);
}

.ceremony-stage {
    position: relative;
    height: 56px;
    margin-top: 6px;
    border-bottom: 1px solid var(--c-linen-taupe);
}

.ceremony-track {
    position: absolute;
    left: 0; right: 0; top: 50%;
    transform: translateY(-50%);
    height: 1px;
    background: var(--c-linen-taupe);
    opacity: 0.4;
}

.ceremony-mark {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--c-linen-taupe);
}

.ceremony-leaf {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: left 720ms var(--ease-sine);
}

.ceremony-leaf.left .leaf-camellia path { stroke: var(--c-terracotta); }
.ceremony-leaf.right .leaf-camellia path { stroke: var(--c-casio-teal); }

.ceremony-result {
    font-family: var(--f-display);
    font-style: italic;
    font-size: 19px;
    color: var(--c-ink-brown);
    text-align: center;
    margin-top: 8px;
    min-height: 28px;
}

.ceremony-result .median-value {
    color: var(--c-brewed-umber);
    font-weight: 400;
}

.paragraph-output {
    font-family: var(--f-display);
    font-size: 15px;
    line-height: 1.62;
    color: var(--c-ink-brown);
    max-height: 130px;
    overflow-y: auto;
    padding: 8px 4px 4px;
    min-height: 30px;
}

.paragraph-output .median-word {
    position: relative;
    color: var(--c-terracotta);
    font-style: italic;
    font-weight: 700;
}

.paragraph-output .median-word::after {
    content: "";
    position: absolute;
    left: 0; bottom: -2px;
    height: 1px;
    width: 0;
    background: var(--c-terracotta);
    animation: underline-draw 320ms var(--ease-sine) forwards;
}

@keyframes underline-draw {
    to { width: 100%; }
}

.midpoint-result {
    position: relative;
    font-family: var(--f-mono);
    font-size: 14px;
    color: var(--c-ink-brown);
    text-align: center;
    min-height: 40px;
    margin-top: 4px;
}

.midpoint-falling-leaf {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    animation: leaf-fall 1200ms var(--ease-sine) forwards;
    pointer-events: none;
}

@keyframes leaf-fall {
    0%   { opacity: 0; transform: translate(-50%, -36px) rotate(-6deg); }
    20%  { opacity: 1; }
    100% { opacity: 1; transform: translate(-50%, 28px) rotate(12deg); }
}

/* ===================================================== */
/* TIER V — COLOPHON                                     */
/* ===================================================== */

.grid-tier-v {
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
}

.card-colophon {
    min-height: calc(var(--baseline) * 7);
    padding: calc(var(--baseline) * 1.6) calc(var(--baseline) * 0.9) calc(var(--baseline) * 1.2);
}

.mesh-tier-v {
    background:
        radial-gradient(ellipse 70% 50% at 50% 50%, rgba(244,236,224,0.6) 0%, transparent 70%),
        radial-gradient(ellipse 80% 60% at 20% 90%, rgba(168,149,128,0.10) 0%, transparent 60%),
        linear-gradient(to bottom, var(--c-unbleached), var(--c-paper-shadow));
}

.colophon-label {
    font-family: var(--f-display);
    font-variant: small-caps;
    font-size: 14px;
    letter-spacing: 0.06em;
    color: var(--c-brewed-umber);
    margin-bottom: calc(var(--baseline) * 0.5);
    margin-top: 4px;
}

.colophon-body {
    font-family: var(--f-display);
    font-style: italic;
    font-size: 14px;
    line-height: 1.52;
    color: var(--c-ink-brown);
}

.colophon-email {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--c-ink-brown);
    letter-spacing: 0.04em;
}

.sitemap {
    display: block;
    margin-top: 4px;
}

.weather-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 4px;
}

.weather-cell {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--f-margin);
    font-style: italic;
    font-size: 14px;
    color: var(--c-ink-brown);
}

.weather-cell .weather-temp {
    font-family: var(--f-mono);
    font-style: normal;
    font-size: 13px;
    color: var(--c-brewed-umber);
    letter-spacing: 0.04em;
}

.colophon-coord {
    font-family: var(--f-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--c-ink-brown);
    margin-bottom: 4px;
}

.leaf-pressed {
    margin: 4px auto 0;
    display: block;
    opacity: 0.75;
}

.colophon-sign {
    font-family: var(--f-display);
    font-style: italic;
    font-size: 14px;
    line-height: 1.5;
    color: var(--c-brewed-umber);
    margin-top: calc(var(--baseline) * 0.6);
    text-align: left;
}

.card-colophon-sign {
    background: linear-gradient(to bottom right, var(--c-paper-shadow), var(--c-unbleached));
}

/* ===================================================== */
/* RESPONSIVE                                            */
/* ===================================================== */

@media (max-width: 1100px) {
    :root { --page-margin: 6%; }
    .grid-tier-ii .card-span-4 { grid-column: span 6; }
    .grid-tier-ii .card-span-5 { grid-column: span 6; }
    .grid-tier-ii .card-span-7 { grid-column: span 12; }
    .grid-tier-iv .card-span-4 { grid-column: span 12; }
    .grid-tier-iii { grid-template-columns: repeat(4, 1fr); }
    .grid-tier-v { grid-template-columns: repeat(6, 1fr); }
    .card-colophon.card-span-1 { grid-column: span 3; }
    .card-colophon.card-span-2 { grid-column: span 3; }
    .threshold-word { font-size: 16vw; }
}

@media (max-width: 680px) {
    :root { --page-margin: 5%; --gutter: 18px; }
    .catalog { padding: calc(var(--baseline) * 2.5) var(--page-margin) calc(var(--baseline) * 4); }
    .tier { margin-bottom: 64px; }
    .tier-rule { margin-top: 48px; }
    .grid-tier-ii .card-span-4,
    .grid-tier-ii .card-span-5,
    .grid-tier-ii .card-span-7 { grid-column: span 12; }
    .grid-tier-iii { grid-template-columns: repeat(2, 1fr); }
    .card-path { transform: translateY(0) !important; }
    .grid-tier-v { grid-template-columns: repeat(2, 1fr); }
    .card-colophon.card-span-1,
    .card-colophon.card-span-2 { grid-column: span 1; }
    .card-threshold { min-height: 44vh; }
    .threshold-word { font-size: 22vw; }
    .tier-heading { font-size: 28px; }
}

/* ===================================================== */
/* REDUCED MOTION                                        */
/* ===================================================== */

@media (prefers-reduced-motion: reduce) {
    .flip-wrap { transition: none !important; }
    .card-def,
    .card-path,
    .path-step,
    .path-margin { animation: none !important; opacity: 1 !important; transform: none !important; }
    .card-border-path rect { animation: none !important; stroke-dashoffset: 0 !important; }
    body::before { animation: drift 120s linear infinite; }
    .card-margin-leaf.flutter { animation: none !important; }
    .ceremony-leaf { transition: none !important; }
}