/* =====================================================================
   lower.bar — a quietly cheerful broadside
   palette : pastel, paper-aged
   type    : IBM Plex Mono + Space Grotesk (Google Fonts)
   pattern : tilt-3d, organic-flow inside Swiss bones
   ===================================================================== */

:root {
    /* palette ---------------------------------------------------------- */
    --paper-cream:        #F4EFE4;
    --soft-saffron:       #FFD978;
    --bisque-rose:        #FFB7B0;
    --celadon-mint:       #B7E2C8;
    --powder-cornflower:  #9DBEE0;
    --heather-lavender:   #D9CFE8;
    --ink-charcoal:       #3A3A3A;
    --sepia-shadow:       #7A6F5C;

    /* type ------------------------------------------------------------- */
    --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
    --font-grot: 'Space Grotesk', 'Inter', sans-serif;

    /* sizing scale (modular, ratio 1.25) ------------------------------- */
    --size-display: clamp(180px, 22vw, 520px);
    --size-h1: 5.6rem;
    --size-h2: 3.6rem;
    --size-lead: 1.8rem;
    --size-body: 1.125rem;
    --size-caption: 0.8125rem;

    /* grid ------------------------------------------------------------- */
    --col: 96px;
    --gutter: 24px;
    --unit: 8px;

    /* motion ----------------------------------------------------------- */
    --ease-settle: cubic-bezier(.16,.84,.32,1);
    --ease-soft:   cubic-bezier(.2,.8,.2,1);
    --dur-short: 480ms;
    --dur-mid:   720ms;
    --dur-long:  1100ms;

    /* scroll-driven master variable (set by JS) ------------------------ */
    --bar-progress: 0;
    --scroll-pct: 0;
}

/* =====================================================================
   reset & base
   ===================================================================== */

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

html {
    scroll-behavior: smooth;
}

html, body {
    background: var(--paper-cream);
    color: var(--ink-charcoal);
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: var(--size-body);
    line-height: 1.7;
    text-transform: lowercase;
    overflow-x: hidden;
}

body {
    perspective: 1200px;
    perspective-origin: 50% 30%;
    min-height: 100vh;
    position: relative;
}

p { text-transform: lowercase; }

/* =====================================================================
   noise overlay & foxing stains
   ===================================================================== */

.noise-overlay {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9000;
    mix-blend-mode: multiply;
    opacity: 0.06;
}

.foxing {
    position: fixed;
    width: 320px;
    height: 320px;
    pointer-events: none;
    z-index: 1;
    background: radial-gradient(circle, rgba(196, 156, 92, 0.18) 0%, rgba(196, 156, 92, 0.08) 40%, transparent 70%);
    filter: blur(10px);
}
.foxing--top-left {
    top: -120px;
    left: -120px;
}
.foxing--bottom-right {
    bottom: -120px;
    right: -120px;
}

/* =====================================================================
   registration crosses (corner printer's marks)
   ===================================================================== */

.reg-cross {
    position: fixed;
    width: 24px;
    height: 24px;
    z-index: 50;
    color: var(--sepia-shadow);
    opacity: 0.55;
    pointer-events: none;
}
.reg-cross svg { width: 24px; height: 24px; stroke: currentColor; stroke-width: 1; }
.reg-cross--tl { top: 28px;  left: 28px; }
.reg-cross--tr { top: 28px;  right: 28px; }
.reg-cross--bl { bottom: 28px; left: 28px; }
.reg-cross--br { bottom: 28px; right: 28px; }

/* =====================================================================
   measurement guide on left margin
   ===================================================================== */

.measurement-guide {
    position: fixed;
    top: 0;
    left: 64px;
    bottom: 0;
    width: 1px;
    background-image: linear-gradient(to bottom,
        var(--bisque-rose) 0%, var(--bisque-rose) 50%,
        transparent 50%, transparent 100%);
    background-size: 1px 8px;
    opacity: 0.30;
    z-index: 2;
    pointer-events: none;
}

/* =====================================================================
   PROTAGONIST BAR — the entire 3D scroll-narrative
   ===================================================================== */

.protagonist-bar {
    position: fixed;
    left: 8vw;
    right: 8vw;
    top: calc(8vh + (var(--bar-progress) * 78vh));
    height: 4px;
    background: var(--soft-saffron);
    z-index: 40;
    pointer-events: none;
    transform-origin: 50% 50%;
    transform-style: preserve-3d;
    transform: rotateX(calc(var(--bar-progress) * 82deg)) translateZ(0);
    box-shadow: 0 calc(4px + (var(--bar-progress) * 8px)) calc(4px + (var(--bar-progress) * 14px)) rgba(122, 111, 92, 0.32);
    border-radius: 2px;
    transition: top var(--dur-long) var(--ease-settle),
                transform var(--dur-long) var(--ease-settle),
                box-shadow var(--dur-long) var(--ease-settle);
}

/* =====================================================================
   cursor follower bar
   ===================================================================== */

.cursor-bar {
    position: fixed;
    width: 24px;
    height: 2px;
    background: var(--soft-saffron);
    border-radius: 1px;
    z-index: 30;
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, -50%) rotateZ(0deg);
    transition: opacity 240ms var(--ease-soft);
    box-shadow: 0 1px 3px rgba(122, 111, 92, 0.25);
}
.cursor-bar.is-active { opacity: 0.6; }

/* =====================================================================
   scroll stage & sections
   ===================================================================== */

.scroll-stage {
    position: relative;
    transform-style: preserve-3d;
    z-index: 10;
}

.section {
    position: relative;
    padding: 12vh 9vw 12vh 12vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transform-style: preserve-3d;
}

/* folio numbers (Swiss exhibition catalogue motif) ----------------- */
.folio {
    position: absolute;
    top: 12vh;
    left: 4vw;
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-grot);
    font-weight: 500;
    color: var(--sepia-shadow);
    z-index: 5;
}
.folio__circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border: 1px solid var(--sepia-shadow);
    border-radius: 50%;
    font-size: 0.875rem;
    letter-spacing: 0.04em;
    background: var(--paper-cream);
}
.folio__label {
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

/* =====================================================================
   SECTION 1 — The Threshold
   ===================================================================== */

.section--threshold {
    align-items: flex-start;
    justify-content: center;
}
.threshold__inner {
    width: 100%;
    max-width: 96vw;
    margin-top: 14vh;
}
.display-word {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: var(--size-display);
    line-height: 0.86;
    letter-spacing: -0.02em;
    color: var(--ink-charcoal);
    transform-style: preserve-3d;
    transform: rotateX(2deg) translateZ(20px);
    text-shadow: 4px 8px 0 rgba(122, 111, 92, 0.08);
}
.threshold__subline {
    margin-top: 6vh;
    font-size: var(--size-lead);
    line-height: 1.45;
    color: var(--sepia-shadow);
    max-width: 32ch;
    letter-spacing: 0.02em;
}

.measurement-glyph {
    position: absolute;
    top: 18vh;
    right: 9vw;
    width: 80px;
    height: 60px;
    transform: rotateY(-8deg);
}
.meas-line {
    stroke: var(--bisque-rose);
    stroke-width: 2.5;
    stroke-linecap: round;
}
.meas-arrow {
    stroke: var(--sepia-shadow);
    stroke-width: 1.5;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* =====================================================================
   SECTION 2 — The Drop
   ===================================================================== */

.section--drop { padding-top: 18vh; }

.drop__grid {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 4vw;
    align-items: start;
    margin-top: 4vh;
    transform-style: preserve-3d;
}

.manifesto-card {
    background: var(--paper-cream);
    border: 1px solid rgba(122, 111, 92, 0.18);
    padding: 5vh 3vw;
    border-radius: 4px;
    transform: rotateY(3deg) translateZ(8px);
    box-shadow: 8px 14px 24px -10px rgba(122, 111, 92, 0.28);
    position: relative;
    transition: transform var(--dur-mid) var(--ease-settle);
    -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,1) 92%, rgba(0,0,0,0.92) 100%);
            mask-image: linear-gradient(135deg, rgba(0,0,0,1) 92%, rgba(0,0,0,0.92) 100%);
}
.manifesto-card::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 1px solid rgba(255, 217, 120, 0.35);
    pointer-events: none;
    border-radius: 3px;
}
.manifesto-card__caption {
    font-family: var(--font-grot);
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--sepia-shadow);
    margin-bottom: 2.4rem;
}
.manifesto-card__body {
    font-size: var(--size-lead);
    line-height: 1.5;
    color: var(--ink-charcoal);
    margin-bottom: 2rem;
}
.manifesto-card__sig {
    font-family: var(--font-grot);
    font-size: 1rem;
    color: var(--sepia-shadow);
    letter-spacing: 0.02em;
}

.permission-stack {
    display: flex;
    flex-direction: column;
    gap: 4vh;
    padding: 5vh 1vw 5vh 3vw;
    transform-style: preserve-3d;
}
.permission-stack__caption {
    font-family: var(--font-grot);
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--sepia-shadow);
    margin-bottom: 1.4rem;
}

.perm-bar {
    --tilt: 6deg;
    position: relative;
    height: 80px;
    padding: 0 2vw;
    background: linear-gradient(90deg, var(--bisque-rose) 0%, var(--bisque-rose) 60%, var(--heather-lavender) 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transform-style: preserve-3d;
    transform: rotateX(var(--tilt)) translateZ(0);
    box-shadow: 6px 10px 16px -6px rgba(122, 111, 92, 0.32);
    transition: transform var(--dur-mid) var(--ease-settle),
                box-shadow var(--dur-mid) var(--ease-settle);
    cursor: pointer;
}
.perm-bar--1 { --tilt: 6deg;  background: linear-gradient(90deg, var(--bisque-rose), var(--soft-saffron)); }
.perm-bar--2 { --tilt: 11deg; background: linear-gradient(90deg, var(--heather-lavender), var(--bisque-rose)); }
.perm-bar--3 { --tilt: 17deg; background: linear-gradient(90deg, var(--celadon-mint), var(--heather-lavender)); }

.permission-stack[data-stack-state="hover"] .perm-bar--1 { --tilt: 2deg; }
.permission-stack[data-stack-state="hover"] .perm-bar--2 { --tilt: 4deg; }
.permission-stack[data-stack-state="hover"] .perm-bar--3 { --tilt: 6deg; }

.perm-bar__tag {
    font-family: var(--font-grot);
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-charcoal);
    opacity: 0.6;
}
.perm-bar__text {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.25rem;
    color: var(--ink-charcoal);
}

/* =====================================================================
   SECTION 3 — The Field
   ===================================================================== */

.section--field {
    padding-top: 16vh;
    padding-bottom: 16vh;
    overflow: hidden;
}

.field__intro {
    max-width: 38ch;
    margin-bottom: 6vh;
}
.field__intro p {
    font-size: var(--size-lead);
    color: var(--sepia-shadow);
}

.field__canvas {
    position: relative;
    width: 100%;
    height: 60vh;
    transform-style: preserve-3d;
}

.drift {
    position: absolute;
    left: var(--x);
    top: var(--y);
    transform-style: preserve-3d;
    transform: translate(-50%, -50%) translate3d(var(--dx, 0), var(--dy, 0), 0) rotateY(0deg) rotateX(0deg);
    transition: transform 600ms var(--ease-soft);
    will-change: transform;
}
.drift__text {
    display: inline-block;
    padding: 14px 26px;
    background: var(--powder-cornflower);
    color: var(--ink-charcoal);
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 1.25rem;
    border-radius: 3px;
    box-shadow: 4px 8px 14px -4px rgba(122, 111, 92, 0.32);
    letter-spacing: 0.01em;
}
.drift:nth-child(2n) .drift__text { background: var(--celadon-mint); }
.drift:nth-child(3n) .drift__text { background: var(--heather-lavender); }
.drift:nth-child(5n) .drift__text { background: var(--bisque-rose); }

.drift:hover {
    transform: translate(-50%, -50%) translate3d(var(--dx, 0), var(--dy, 0), 0) rotateY(18deg) rotateX(-6deg);
    z-index: 5;
}

/* =====================================================================
   SECTION 4 — The Ledger
   ===================================================================== */

.section--ledger { padding-top: 16vh; padding-bottom: 16vh; }

.ledger__head { margin-bottom: 6vh; max-width: 60ch; }
.ledger__title {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: var(--size-h2);
    color: var(--ink-charcoal);
    line-height: 1.05;
    letter-spacing: -0.005em;
    margin-bottom: 1.6rem;
}
.ledger__sub {
    font-size: var(--size-lead);
    color: var(--sepia-shadow);
    line-height: 1.5;
}

.ledger__chart {
    display: flex;
    flex-direction: column;
    gap: 22px;
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(122, 111, 92, 0.22);
    padding: 5vh 3vw;
    border-radius: 4px;
    transform: rotateX(2deg);
    transform-style: preserve-3d;
    box-shadow: 8px 14px 30px -12px rgba(122, 111, 92, 0.25);
    position: relative;
}
.ledger__chart::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px solid rgba(255, 217, 120, 0.4);
    pointer-events: none;
    border-radius: 3px;
}

.ledger-row {
    display: grid;
    grid-template-columns: 200px 60px 1fr 140px;
    align-items: center;
    gap: 18px;
}
.ledger-row__label {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--ink-charcoal);
}
.ledger-row__num {
    font-family: var(--font-grot);
    font-weight: 500;
    font-size: 1.25rem;
    color: var(--sepia-shadow);
    font-variant-numeric: tabular-nums;
    text-align: right;
}
.ledger-row__bar {
    position: relative;
    height: 18px;
    background: rgba(122, 111, 92, 0.10);
    border-radius: 2px;
    overflow: hidden;
}
.ledger-row__fill {
    /* JS-injected fill element — initial styles set inline by script.js */
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.ledger-row__caption {
    font-family: var(--font-grot);
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.ledger-row__caption--low { color: var(--celadon-mint); filter: brightness(0.65) saturate(1.4); }
.ledger-row__caption--high { color: var(--sepia-shadow); opacity: 0.65; }

.check {
    width: 22px; height: 14px;
    stroke: var(--celadon-mint);
    stroke-width: 2;
    filter: brightness(0.8);
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 32;
    stroke-dashoffset: 32;
    transition: stroke-dashoffset 720ms var(--ease-settle) 600ms;
}
.ledger-row.is-revealed .check { stroke-dashoffset: 0; }

.ink-bleed {
    position: absolute;
    bottom: 4vh;
    right: 8vw;
    width: 240px;
    height: 80px;
    background: radial-gradient(ellipse at center,
        rgba(255, 183, 176, 0.4) 0%,
        rgba(255, 183, 176, 0.18) 50%,
        transparent 80%);
    filter: blur(8px);
    pointer-events: none;
}

/* =====================================================================
   SECTION 5 — The Settling
   ===================================================================== */

.section--settling {
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 18vh 9vw;
}
.settling__inner {
    max-width: 70ch;
    transform-style: preserve-3d;
}
.settling__caption {
    font-family: var(--font-grot);
    font-size: var(--size-caption);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--sepia-shadow);
    margin-bottom: 2vh;
}
.settling__line {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: var(--size-h1);
    line-height: 1.05;
    color: var(--ink-charcoal);
    margin-bottom: 6vh;
    letter-spacing: -0.005em;
}

.lower-button {
    --tilt: 0deg;
    background: var(--bisque-rose);
    color: var(--ink-charcoal);
    border: none;
    padding: 22px 44px;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
    text-transform: lowercase;
    border-radius: 3px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 18px;
    transform-style: preserve-3d;
    transform: rotateX(var(--tilt)) translateZ(0);
    box-shadow: 4px 10px 18px -6px rgba(122, 111, 92, 0.36);
    transition: transform var(--dur-mid) var(--ease-settle),
                box-shadow var(--dur-mid) var(--ease-settle),
                background var(--dur-mid) var(--ease-settle);
    animation: pulse-soft 3.4s var(--ease-settle) infinite;
}
.lower-button:hover {
    --tilt: 4deg;
    background: var(--soft-saffron);
    box-shadow: 4px 14px 24px -8px rgba(122, 111, 92, 0.4);
}
.lower-button__arrow {
    transition: transform var(--dur-short) var(--ease-soft);
}
.lower-button:hover .lower-button__arrow {
    transform: translateX(6px);
}

@keyframes pulse-soft {
    0%, 100% { transform: rotateX(var(--tilt)) translateZ(0) scale(1); }
    50%      { transform: rotateX(var(--tilt)) translateZ(0) scale(1.02); }
}

/* =====================================================================
   responsive — keep the broadside readable
   ===================================================================== */

@media (max-width: 900px) {
    :root { --size-h1: 3.4rem; --size-h2: 2.4rem; --size-lead: 1.4rem; }

    .section { padding: 10vh 6vw; }
    .folio { left: 6vw; }
    .measurement-guide { display: none; }
    .protagonist-bar { left: 4vw; right: 4vw; }
    .drop__grid { grid-template-columns: 1fr; gap: 6vh; }
    .manifesto-card { padding: 4vh 6vw; }
    .ledger__chart { padding: 4vh 5vw; }
    .ledger-row { grid-template-columns: 1fr; gap: 8px; }
    .ledger-row__bar { width: 100%; }
    .display-word { font-size: clamp(120px, 28vw, 320px); }
    .reg-cross--tl, .reg-cross--tr, .reg-cross--bl, .reg-cross--br { width: 16px; height: 16px; }
    .reg-cross svg { width: 16px; height: 16px; }
    .measurement-glyph { display: none; }
    .field__canvas { height: 80vh; }
}

@media (max-width: 600px) {
    .display-word { font-size: clamp(96px, 32vw, 220px); }
    .perm-bar { height: 64px; }
    .perm-bar__text { font-size: 1rem; }
    .perm-bar__tag { display: none; }
    .lower-button { padding: 16px 28px; font-size: 1rem; }
}