/* =========================================================================
   miris-project.net — Swiss Archival Bureau
   Stacked sections, warm palette, condensed typography, isometric icons.
   ========================================================================= */

/* ---------- TOKENS ---------- */
:root {
    /* Colors */
    --c-cream:        #F5EDE0;
    --c-parchment:    #EBE1D1;
    --c-text:         #2C2418;
    --c-text-soft:    #6B5E50;
    --c-terracotta:   #C45D3E;
    --c-saffron:      #D4A843;
    --c-rose:         #C4887A;
    --c-sienna:       #A8522E;
    --c-umber:        #3A2E24;
    --c-warm-white:   #F2EAD9;
    --c-grain:        #D4C8B4;

    /* Typography */
    --ff-display:  "Bebas Neue", Impact, "Arial Narrow", sans-serif;
    --ff-cond:     "Barlow Condensed", "Inter", sans-serif;
    --ff-body:     "Barlow", "IBM Plex Sans", "Inter", sans-serif;
    --ff-mono:     "IBM Plex Mono", "SFMono-Regular", monospace;

    /* Rhythm */
    --u: 8px;
    --gutter: 24px;
    --margin: 48px;
    --max: 1320px;

    /* Sizes */
    --fs-hero: clamp(72px, 12vw, 200px);
    --fs-section: clamp(40px, 5.4vw, 72px);
    --fs-deck: clamp(18px, 1.6vw, 22px);
    --fs-body: 16px;
    --fs-cap: 14px;
    --fs-micro: 12px;

    /* Misc */
    --tb-h: 56px;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--c-cream);
    color: var(--c-text);
    font-family: var(--ff-body);
    font-size: var(--fs-body);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: 0; color: inherit; cursor: pointer; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
dt, dd { margin: 0; }
figure { margin: 0; }

/* ---------- PAPER GRAIN BACKGROUND ---------- */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    background-image:
        radial-gradient(rgba(196, 93, 62, 0.03) 1px, transparent 1px),
        radial-gradient(rgba(58, 46, 36, 0.025) 1px, transparent 1px);
    background-size: 3px 3px, 7px 7px;
    background-position: 0 0, 1px 1px;
    mix-blend-mode: multiply;
    opacity: 0.6;
}

/* ---------- TOP BAR ---------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--c-cream);
    border-bottom: 1px solid rgba(196, 93, 62, 0.7);
    transition: background 480ms cubic-bezier(0.34, 1.4, 0.5, 1),
                color 480ms cubic-bezier(0.34, 1.4, 0.5, 1),
                border-color 480ms cubic-bezier(0.34, 1.4, 0.5, 1);
}
.topbar--dark {
    background: var(--c-umber);
    color: var(--c-warm-white);
    border-bottom-color: rgba(212, 168, 67, 0.6);
}
.topbar--dark .topbar__brand { color: var(--c-warm-white); }
.topbar--dark .topbar__meta  { color: rgba(242, 234, 217, 0.7); }
.topbar--dark .topbar__menu .dot { background: var(--c-saffron); }
.topbar--dark .topbar__rule {
    background: linear-gradient(90deg,
        transparent 0,
        var(--c-saffron) 18%,
        var(--c-saffron) 82%,
        transparent 100%);
    opacity: 0.5;
}
.topbar__inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 var(--margin);
    height: var(--tb-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.topbar__brand {
    font-family: var(--ff-display);
    letter-spacing: 0.12em;
    font-size: 22px;
    color: var(--c-text);
}
.topbar__meta {
    font-family: var(--ff-cond);
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-text-soft);
}
.topbar__menu {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    padding: 8px 4px;
    transition: transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.topbar__menu:hover { transform: translateY(-2px); }
.topbar__menu .dot {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--c-terracotta);
}
.topbar__menu .dot:nth-child(2) { width: 14px; }
.topbar__menu .dot:nth-child(3) { width: 22px; }
.topbar__rule {
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0,
        var(--c-sienna) 18%,
        var(--c-sienna) 82%,
        transparent 100%);
    opacity: 0.4;
}

/* ---------- FLY-OUT MENU ---------- */
.flyout {
    position: fixed;
    top: var(--tb-h);
    right: 0;
    width: min(380px, 90vw);
    background: var(--c-cream);
    border-left: 1px solid var(--c-sienna);
    border-bottom: 1px solid var(--c-sienna);
    padding: 32px 40px 40px;
    transform: translateX(110%);
    transition: transform 480ms cubic-bezier(0.34, 1.4, 0.5, 1);
    z-index: 49;
    box-shadow: -16px 16px 40px rgba(58, 46, 36, 0.08);
}
.flyout.is-open { transform: translateX(0); }
.flyout ul { display: flex; flex-direction: column; gap: 16px; }
.flyout a {
    display: flex;
    align-items: baseline;
    gap: 16px;
    font-family: var(--ff-display);
    font-size: 28px;
    letter-spacing: 0.08em;
    color: var(--c-text);
    transition: color 220ms cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.flyout a::before {
    content: attr(data-num);
    font-family: var(--ff-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--c-terracotta);
    border: 1px solid var(--c-terracotta);
    padding: 2px 6px;
    line-height: 1;
}
.flyout a:hover {
    color: var(--c-terracotta);
    transform: translateX(4px);
}
.flyout__legend {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px dashed var(--c-sienna);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--c-text-soft);
    text-transform: uppercase;
}

/* ---------- GRID ---------- */
.grid {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 var(--margin);
    width: 100%;
}
.grid--12 {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gutter);
    row-gap: 32px;
}
.col-span-4  { grid-column: span 4; }
.col-span-5  { grid-column: span 5; }
.col-span-6  { grid-column: span 6; }
.col-span-7  { grid-column: span 7; }
.col-span-12 { grid-column: span 12; }

/* ---------- BAND BASE ---------- */
.band {
    position: relative;
    width: 100%;
    min-height: 100vh;
    padding: 96px 0;
    display: flex;
    align-items: center;
    overflow: hidden;
    z-index: 2;
}
.band--light { background: var(--c-cream); color: var(--c-text); }
.band--alt   { background: var(--c-parchment); color: var(--c-text); }
.band--dark  {
    background: var(--c-umber);
    color: var(--c-warm-white);
}
.band--dark .section-deck { color: rgba(242, 234, 217, 0.78); }
.band--dark .panel__body, .band--dark .note__body { color: rgba(242, 234, 217, 0.86); }

/* corner brackets on title band */
.band__corner {
    position: absolute;
    width: 32px;
    height: 32px;
    border: 0 solid var(--c-terracotta);
    border-width: 1.5px;
    pointer-events: none;
    z-index: 3;
}
.band__corner--tl {
    top: 24px; left: 24px;
    border-right: 0; border-bottom: 0;
}
.band__corner--br {
    bottom: 24px; right: 24px;
    border-left: 0; border-top: 0;
}

/* dot grid */
.dotgrid {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, var(--c-grain) 1px, transparent 1.4px);
    background-size: 24px 24px;
    opacity: 0.28;
    z-index: 1;
    will-change: transform;
}

/* ---------- TITLE CARD (SECTION 01) ---------- */
.band--title { padding: 96px 0; }
.title-card {
    grid-column: 1 / -1;
    text-align: left;
    position: relative;
    z-index: 2;
    padding-left: max(0px, 4vw);
}
.hero {
    font-family: var(--ff-display);
    font-size: var(--fs-hero);
    line-height: 0.92;
    letter-spacing: 0.04em;
    margin: 24px 0 32px;
    color: var(--c-text);
}
.hero__line { display: block; }
.hero__line--rule {
    font-size: 0.42em;
    letter-spacing: 0.32em;
    color: var(--c-terracotta);
    margin-top: 16px;
}
.hero__tagline {
    font-family: var(--ff-cond);
    font-size: var(--fs-deck);
    line-height: 1.4;
    letter-spacing: 0.01em;
    max-width: 56ch;
    color: var(--c-text-soft);
    margin: 0 0 48px;
}
.hero__icon {
    width: 240px;
    max-width: 36vw;
    opacity: 0.55;
    margin: 0 0 40px -8px;
    transition: transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 400ms ease-out;
}
.hero__icon:hover { transform: translateY(-6px) scale(1.03); opacity: 0.78; }
.title-card__credit {
    font-size: 12px;
    letter-spacing: 0.24em;
    color: var(--c-terracotta);
}

/* ---------- BAND HEADER ---------- */
.band__header {
    margin-bottom: 48px;
    position: relative;
}
.band__header--center { text-align: center; }
.section-title {
    font-family: var(--ff-display);
    font-size: var(--fs-section);
    letter-spacing: 0.05em;
    line-height: 1.05;
    margin: 16px 0 16px;
    color: inherit;
}
.section-deck {
    font-family: var(--ff-cond);
    font-weight: 400;
    font-size: var(--fs-deck);
    line-height: 1.45;
    max-width: 70ch;
    color: var(--c-text-soft);
    margin: 0;
}
.band--dark .section-title { color: var(--c-warm-white); }

/* ---------- CARTOUCHE (section number frame) ---------- */
.cartouche {
    display: inline-block;
    font-family: var(--ff-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--c-terracotta);
    border: 1px solid var(--c-terracotta);
    padding: 4px 8px;
    line-height: 1;
}
.cartouche--sm { font-size: 11px; padding: 3px 6px; }
.cartouche--inverse {
    color: var(--c-saffron);
    border-color: var(--c-saffron);
}
.band--dark .cartouche { color: var(--c-saffron); border-color: var(--c-saffron); }

/* mono accents */
.mono { font-family: var(--ff-mono); }
.mono--accent { color: var(--c-terracotta); letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; }
.mono--gold { color: var(--c-saffron); letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; }

/* ---------- DIVIDERS ---------- */
.divider {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    height: 88px;
    background: var(--c-cream);
    z-index: 2;
}
.divider--to-dark {
    background: linear-gradient(180deg, var(--c-cream) 0%, var(--c-cream) 30%, var(--c-umber) 100%);
}
.divider--to-light {
    background: linear-gradient(180deg, var(--c-umber) 0%, var(--c-umber) 30%, var(--c-cream) 100%);
}
.divider__plus {
    font-family: var(--ff-mono);
    color: var(--c-sienna);
    font-size: 18px;
    line-height: 1;
}
.divider__line {
    position: relative;
    display: block;
    width: min(66.66%, 880px);
    height: 4px;
    background: rgba(196, 93, 62, 0.12);
    overflow: hidden;
}
.divider__line-fill {
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 0;
    background: var(--c-terracotta);
    transform: translateX(-50%);
    transition: width 800ms cubic-bezier(0.34, 1.4, 0.5, 1);
}
.divider.is-in .divider__line-fill { width: 100%; }
.divider.is-in .divider__plus { animation: plusFade 240ms cubic-bezier(0.34, 1.56, 0.64, 1) 600ms both; }
.divider__num {
    position: absolute;
    left: var(--margin);
    bottom: 8px;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--c-terracotta);
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 400ms ease, transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
    transition-delay: 700ms;
}
.divider.is-in .divider__num { opacity: 0.9; transform: translateY(0); }

@keyframes plusFade {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- DENSE PANEL CARDS ---------- */
.panel {
    position: relative;
    padding: 28px 24px 28px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(168, 82, 46, 0.18);
    transition: transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 420ms ease-out,
                border-color 220ms ease-out;
}
.band--dark .panel {
    background: rgba(245, 237, 224, 0.04);
    border-color: rgba(212, 168, 67, 0.22);
}
.panel:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 32px rgba(58, 46, 36, 0.12);
    border-color: var(--c-terracotta);
}
.panel--wide {
    padding: 32px 32px;
}
.panel .cartouche { margin-bottom: 16px; }
.panel__title {
    font-family: var(--ff-cond);
    font-weight: 600;
    font-size: clamp(22px, 2.2vw, 28px);
    letter-spacing: 0.02em;
    line-height: 1.2;
    margin: 0 0 12px;
    color: inherit;
}
.panel__body {
    font-size: 15px;
    line-height: 1.65;
    margin: 0 0 16px;
    color: var(--c-text-soft);
}
.panel__meta {
    margin: 0;
    color: var(--c-terracotta);
}
.band--dark .panel__title { color: var(--c-warm-white); }
.band--dark .panel__meta  { color: var(--c-saffron); }

/* corner brackets on panels */
.panel::before, .panel::after {
    content: "";
    position: absolute;
    width: 16px; height: 16px;
    border: 1.5px solid var(--c-terracotta);
}
.panel::before {
    top: -1px; left: -1px;
    border-right: 0; border-bottom: 0;
}
.panel::after {
    bottom: -1px; right: -1px;
    border-left: 0; border-top: 0;
}
.band--dark .panel::before, .band--dark .panel::after { border-color: var(--c-saffron); }

/* ---------- ISO GRID (SECTION 03) ---------- */
.iso-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
}
.iso-grid__item {
    position: relative;
    padding: 32px 28px 28px;
    border: 1px solid rgba(212, 168, 67, 0.22);
    background: rgba(245, 237, 224, 0.03);
    transition: transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 420ms ease-out,
                border-color 220ms ease-out;
}
.iso-grid__item:hover {
    transform: translateY(-6px);
    border-color: var(--c-saffron);
    box-shadow: 0 18px 40px rgba(0,0,0,0.32);
}
.iso-grid__svg {
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.iso-grid__svg svg { width: 80%; height: 80%; transition: transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1); }
.iso-grid__item:hover .iso-grid__svg svg { transform: translateY(-4px) rotate(-1deg); }
.iso-grid__title {
    font-family: var(--ff-cond);
    font-weight: 600;
    font-size: 22px;
    letter-spacing: 0.02em;
    margin: 0 0 8px;
    color: var(--c-warm-white);
}
.iso-grid__body {
    font-size: 14px;
    line-height: 1.55;
    color: rgba(242, 234, 217, 0.72);
    margin: 0 0 16px;
}
.iso-grid__meta { margin: 0; }

/* corner brackets on iso items */
.iso-grid__item::before, .iso-grid__item::after {
    content: "";
    position: absolute;
    width: 16px; height: 16px;
    border: 1.5px solid var(--c-saffron);
}
.iso-grid__item::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.iso-grid__item::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* ---------- METHOD (SECTION 04) ---------- */
.method {
    display: flex;
    flex-direction: column;
    gap: 32px;
    counter-reset: method;
}
.method__step {
    position: relative;
    padding: 24px 24px 24px 96px;
    border-bottom: 1px dashed rgba(168, 82, 46, 0.32);
}
.method__step:last-child { border-bottom: 0; }
.method__step::before {
    content: "+";
    position: absolute;
    left: 24px;
    top: 24px;
    font-family: var(--ff-mono);
    font-size: 22px;
    color: var(--c-sienna);
}
.method__num {
    display: block;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--c-terracotta);
    text-transform: uppercase;
    margin-bottom: 8px;
}
.method__title {
    font-family: var(--ff-cond);
    font-weight: 600;
    font-size: clamp(22px, 2.2vw, 30px);
    letter-spacing: 0.01em;
    margin: 0 0 12px;
    color: var(--c-text);
    line-height: 1.25;
}
.method__body {
    margin: 0;
    color: var(--c-text-soft);
    line-height: 1.7;
}

.method__aside {
    position: sticky;
    top: calc(var(--tb-h) + 32px);
    align-self: start;
    background: var(--c-cream);
    padding: 32px 28px;
    border: 1px solid var(--c-sienna);
    transition: transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.method__aside .cartouche { margin-bottom: 16px; }
.method__aside-title {
    font-family: var(--ff-cond);
    font-weight: 600;
    font-size: 24px;
    letter-spacing: 0.02em;
    margin: 0 0 12px;
}
.method__aside-body {
    margin: 0 0 20px;
    color: var(--c-text-soft);
    line-height: 1.7;
}
.margin-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px dashed rgba(168, 82, 46, 0.4);
    padding-top: 16px;
    margin-bottom: 24px;
}
.margin-list li {
    display: flex; gap: 12px; font-size: 14px; color: var(--c-text);
}
.margin-list .mono--accent { min-width: 18px; }
.method__svg svg {
    width: 100%;
    height: auto;
    margin-top: 12px;
}

/* corner brackets on aside */
.method__aside::before, .method__aside::after {
    content: "";
    position: absolute;
    width: 16px; height: 16px;
    border: 1.5px solid var(--c-terracotta);
}
.method__aside::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.method__aside::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
.method__aside { position: relative; }

/* ---------- SCENE (SECTION 05) ---------- */
.scene {
    position: relative;
    margin: 0 auto;
    background: var(--c-warm-white);
    border: 1px solid rgba(168, 82, 46, 0.4);
    padding: 32px;
}
.scene__svg { width: 100%; height: auto; }
.scene__caption {
    margin-top: 16px;
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--c-terracotta);
    text-align: center;
    text-transform: uppercase;
}
.scene::before, .scene::after {
    content: "";
    position: absolute;
    width: 24px; height: 24px;
    border: 1.5px solid var(--c-terracotta);
}
.scene::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.scene::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.legend {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px 32px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px dashed rgba(168, 82, 46, 0.4);
}
.legend li {
    display: flex; align-items: baseline; gap: 12px;
    font-size: 14px; color: var(--c-text);
}
.legend__key {
    flex: 0 0 auto;
    width: 22px; height: 22px;
    border: 1px solid var(--c-terracotta);
    color: var(--c-terracotta);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 11px;
}

/* ---------- NOTES (SECTION 06) ---------- */
.notes {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px 32px;
}
.note {
    position: relative;
    padding: 28px 24px 24px;
    background: rgba(245, 237, 224, 0.04);
    border: 1px solid rgba(212, 168, 67, 0.22);
    transition: transform 420ms cubic-bezier(0.34, 1.56, 0.64, 1),
                border-color 220ms ease-out,
                background 220ms ease-out;
}
.note:hover {
    transform: translateY(-4px);
    border-color: var(--c-saffron);
    background: rgba(245, 237, 224, 0.08);
}
.note .cartouche { margin-bottom: 16px; }
.note__body {
    font-family: var(--ff-cond);
    font-weight: 400;
    font-size: 19px;
    line-height: 1.5;
    margin: 0 0 20px;
    color: var(--c-warm-white);
}
.note__meta { margin: 0; }
.note::before, .note::after {
    content: "";
    position: absolute;
    width: 16px; height: 16px;
    border: 1.5px solid var(--c-saffron);
}
.note::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.note::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* ---------- FOOTER / CORRESPONDENCE (SECTION 07) ---------- */
.band--footer { min-height: auto; padding: 96px 0 80px; }
.corr {
    border-left: 2px solid var(--c-terracotta);
    padding: 8px 0 8px 24px;
}
.corr__title {
    font-family: var(--ff-cond);
    font-weight: 600;
    font-size: 24px;
    margin: 0 0 16px;
    letter-spacing: 0.02em;
}
.corr__list {
    display: grid;
    grid-template-columns: max-content 1fr;
    column-gap: 24px;
    row-gap: 8px;
    margin: 0 0 16px;
}
.corr__list dt {
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--c-terracotta);
    align-self: baseline;
}
.corr__list dd {
    color: var(--c-text-soft);
    line-height: 1.5;
}
.corr__address {
    font-style: normal;
    color: var(--c-text);
    line-height: 1.7;
    margin-bottom: 16px;
}
.corr__line {
    margin: 0;
    font-size: 11px;
    letter-spacing: 0.24em;
    color: var(--c-terracotta);
}
.colophon {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--c-sienna);
}
.colophon .cartouche { margin-bottom: 16px; }
.colophon__body {
    font-family: var(--ff-cond);
    font-size: 19px;
    line-height: 1.55;
    color: var(--c-text-soft);
    max-width: 80ch;
    margin: 0 0 24px;
}
.colophon__sig {
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--c-terracotta);
}

/* ---------- ENTRANCE STAGGER ---------- */
.stagger {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 700ms cubic-bezier(0.22, 1.16, 0.36, 1),
                transform 700ms cubic-bezier(0.22, 1.16, 0.36, 1);
    transition-delay: var(--stagger-delay, 0ms);
    will-change: opacity, transform;
}
.stagger.is-in { opacity: 1; transform: translateY(0); }
.iso-grid__item.stagger.is-in,
.note.stagger.is-in {
    /* iso entrance with slight scale */
    animation: isoIn 740ms cubic-bezier(0.22, 1.32, 0.36, 1) both;
    animation-delay: var(--stagger-delay, 0ms);
}
@keyframes isoIn {
    0%   { opacity: 0; transform: translateY(28px) scale(0.92); }
    60%  { opacity: 1; transform: translateY(-4px) scale(1.02); }
    100% { opacity: 1; transform: translateY(0)    scale(1); }
}

/* ---------- PROGRESS METER ---------- */
.progress {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 40;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: rgba(245, 237, 224, 0.92);
    border: 1px solid var(--c-sienna);
    backdrop-filter: blur(6px);
    transition: transform 320ms cubic-bezier(0.34, 1.4, 0.5, 1);
}
.progress__rail {
    position: relative;
    width: 120px;
    height: 4px;
    background: rgba(168, 82, 46, 0.18);
}
.progress__fill {
    position: absolute;
    inset: 0 auto 0 0;
    width: 0;
    background: var(--c-terracotta);
    transition: width 220ms cubic-bezier(0.34, 1.4, 0.5, 1);
}
.progress__num {
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--c-terracotta);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
    :root { --margin: 32px; }
    .grid--12 { grid-template-columns: repeat(8, minmax(0, 1fr)); column-gap: 20px; }
    .col-span-4 { grid-column: span 8; }
    .col-span-5 { grid-column: span 8; }
    .col-span-6 { grid-column: span 8; }
    .col-span-7 { grid-column: span 8; }
    .col-span-12 { grid-column: span 8; }
    .iso-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .notes    { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .legend   { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .method__aside { position: static; }
    .topbar__meta { display: none; }
}

@media (max-width: 720px) {
    :root { --margin: 20px; --gutter: 16px; }
    .band { padding: 64px 0; min-height: auto; }
    .grid--12 { grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: 16px; }
    .col-span-4, .col-span-5, .col-span-6, .col-span-7, .col-span-12 { grid-column: span 4; }
    .iso-grid, .notes, .legend { grid-template-columns: 1fr; }
    .hero { letter-spacing: 0.02em; }
    .hero__icon { width: 180px; max-width: 70vw; }
    .topbar__meta { display: none; }
    .topbar__brand { font-size: 18px; }
    .method__step { padding-left: 64px; }
    .method__step::before { left: 16px; }
    .progress { display: none; }
    .divider__num { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .stagger, .divider__line-fill, .progress__fill {
        transition: none;
    }
    .stagger { opacity: 1; transform: none; }
    .divider .divider__line-fill { width: 100%; }
}