/* VSP — Sơn gỗ gốc nước · V2 (single page, bilingual)
   Classical system from the company deck. Vietnamese = serif (Lora / Cormorant);
   English = sans-serif, smaller, warm grey, gold hairline — always shown. */

@font-face { font-family: "Cormorant Garamond"; font-weight: 300 700; font-display: swap; src: url("../fonts/cormorant-vi.woff2") format("woff2");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: "Cormorant Garamond"; font-weight: 300 700; font-display: swap; src: url("../fonts/cormorant-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Cormorant Garamond"; font-weight: 300 700; font-display: swap; src: url("../fonts/cormorant-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Lora"; font-weight: 400 700; font-display: swap; src: url("../fonts/lora-vi.woff2") format("woff2");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: "Lora"; font-weight: 400 700; font-display: swap; src: url("../fonts/lora-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Lora"; font-weight: 400 700; font-display: swap; src: url("../fonts/lora-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  color-scheme: light;
  --paper: #f3f2f2;
  --surface: #eae9e9;
  --ink: #201f1d;
  --ink-muted: #5e5c59;
  --en: #6e665e;                 /* English voice — warm grey, ≥ 5:1 on paper */
  --night: #262424;
  --night-2: #2f2c2b;
  --on-night: #f3f2f2;
  --on-night-muted: #bdb8b3;
  --en-night: #a9a29b;
  --gold: #b68235;
  --gold-light: #e1ad66;
  --gold-deep: #7d5411;
  --gold-wash: rgba(182, 130, 53, .14);
  --rule: rgba(32, 31, 29, .16);
  --rule-night: rgba(243, 242, 242, .18);

  --font-display: "Cormorant Garamond", "Lora", Georgia, serif;
  --font-body: "Lora", Georgia, "Times New Roman", serif;
  --font-en: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;

  --step--1: clamp(.82rem, .79rem + .15vw, .9rem);
  --step-0: clamp(1rem, .96rem + .2vw, 1.0625rem);
  --step-1: clamp(1.15rem, 1.06rem + .45vw, 1.35rem);
  --step-2: clamp(1.45rem, 1.25rem + 1vw, 2rem);
  --step-3: clamp(1.85rem, 1.45rem + 1.9vw, 2.9rem);
  --step-4: clamp(2.4rem, 1.7rem + 3.2vw, 4.2rem);
  --step-5: clamp(2.9rem, 1.9rem + 5vw, 6rem);

  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1360px;
  --toc-w: 248px;
  --header-h: 64px;
  --gap-sec: clamp(64px, 9vw, 128px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); font-size: var(--step-0);
  line-height: 1.68; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--gold-deep); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; line-height: 1.12; letter-spacing: -.012em; margin: 0; font-feature-settings: "lnum" 1; text-wrap: balance; }
p { margin: 0 0 1em; text-wrap: pretty; }
figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
::selection { background: rgba(182, 130, 53, .3); }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 200; }
.skip:focus { left: 8px; }
svg { overflow: visible; }

/* ── The English voice ── */
.en { font-family: var(--font-en); font-weight: 400; color: var(--en); letter-spacing: .005em; font-style: normal; }
p.en, div.en { font-size: .86em; line-height: 1.6; border-left: 2px solid var(--gold-wash); padding-left: .85em; margin-top: -.35em; }
span.en, small.en { display: block; font-size: .8em; line-height: 1.45; margin-top: .2em; }
h1 .en, h2 .en, h3 .en, h4 .en { display: block; font-family: var(--font-en); font-weight: 400; letter-spacing: .01em; color: var(--en); text-wrap: balance; }
h1 .en { font-size: .3em; margin-top: .6em; letter-spacing: .04em; }
h2 .en { font-size: max(.38em, 1rem); margin-top: .55em; }
h3 .en { font-size: max(.5em, .95rem); margin-top: .45em; }
h4 .en { font-size: max(.72em, .85rem); margin-top: .3em; }
.night .en { color: var(--en-night); }
.night p.en, .night div.en { border-left-color: rgba(225, 173, 102, .35); }
.en-tag { font-family: var(--font-en); font-size: .62rem; letter-spacing: .14em; color: var(--gold-deep); border: 1px solid var(--gold-wash); padding: 1px 4px; margin-right: .5em; vertical-align: .15em; }

.num-k { display: inline-flex; align-items: baseline; gap: 10px; font: 400 1.05rem/1 var(--font-display); color: var(--gold-deep);
  letter-spacing: .08em; font-feature-settings: "lnum" 1; margin-bottom: 18px; }
.num-k::after { content: ""; width: 36px; height: 1px; background: var(--gold); align-self: center; }
.night .num-k { color: var(--gold-light); }
.muted { color: var(--ink-muted); }
.lede { font-size: var(--step-1); line-height: 1.6; max-width: 62ch; }
.lede + .en { font-size: calc(var(--step-1) * .8); max-width: 66ch; }

/* ── Header ── */
.site-header { position: sticky; top: 0; z-index: 60; background: rgba(243, 242, 242, .95);
  -webkit-backdrop-filter: saturate(1.2) blur(8px); backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid var(--rule); }
.site-header .bar { display: flex; align-items: center; gap: 16px; min-height: var(--header-h); max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; padding-inline: var(--gutter); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-mark { border: 1.5px solid var(--gold); color: var(--gold-deep); font: 600 1.1rem/1 var(--font-display); letter-spacing: .06em; padding: 7px 10px 6px; flex-shrink: 0; }
.brand-name { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-name b { font: 500 1.06rem/1.1 var(--font-display); }
.brand-name i { font: normal .72rem/1.3 var(--font-en); letter-spacing: .06em; color: var(--en); }
.head-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.head-link { font: 400 .9rem/1 var(--font-body); color: var(--ink); text-decoration: none; padding: 8px 6px; white-space: nowrap; }
.head-link .en { display: inline; margin-left: 6px; font-size: .78rem; }
.btn { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; min-height: 46px; padding: .55em 1.3em;
  border: 1px solid var(--ink); border-radius: 2px; background: var(--ink); color: var(--paper); text-decoration: none; cursor: pointer;
  font: 500 .82rem/1.2 var(--font-body); letter-spacing: .08em; text-transform: uppercase; transition: background .2s, border-color .2s, color .2s; }
.btn .en { color: inherit; opacity: .72; text-transform: none; letter-spacing: .02em; font-size: .72rem; margin-top: 2px; display: block; }
.btn:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.night .btn { background: var(--gold); border-color: var(--gold); color: var(--night); }
.night .btn:hover { background: var(--on-night); border-color: var(--on-night); }
.night .btn-ghost { background: transparent; color: var(--on-night); border-color: var(--rule-night); }
.night .btn-ghost:hover { background: var(--on-night); color: var(--night); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-sm { min-height: 40px; padding: .45em 1em; }
.toc-btn { display: none; appearance: none; border: 1px solid var(--rule); background: transparent; color: var(--ink); border-radius: 2px;
  min-height: 42px; padding: 6px 12px; cursor: pointer; align-items: center; gap: 10px; font: 500 .82rem/1.15 var(--font-body); text-align: left; }
.toc-btn .en { display: block; font-size: .68rem; margin: 0; }
.toc-btn svg { width: 18px; height: 18px; flex-shrink: 0; }
/* current chapter strip (tablet/phone) */
.now { display: none; border-top: 1px solid var(--rule); }
.now-inner { display: flex; align-items: baseline; gap: 10px; padding: 7px var(--gutter); font-size: .86rem; white-space: nowrap; overflow: hidden; }
.now-inner b { font: 400 1rem/1 var(--font-display); color: var(--gold-deep); }
.now-inner .en { display: inline; font-size: .74rem; overflow: hidden; text-overflow: ellipsis; }
.progress { position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%; background: var(--gold); transform-origin: 0 50%; transform: scaleX(0); }

/* ── Hero ── */
.night { background: var(--night); color: var(--on-night); }
.night .muted { color: var(--on-night-muted); }
.hero .wrap { max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; padding: clamp(48px, 7vw, 108px) var(--gutter) clamp(40px, 5vw, 72px);
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.hero h1 { font-size: var(--step-5); color: var(--on-night); }
.hero .lede { color: var(--on-night); opacity: .9; margin-top: 1.4rem; }
.hero .btn-row { margin-top: 2rem; }
.kicker { display: block; font: 400 .78rem/1.4 var(--font-en); letter-spacing: .18em; text-transform: uppercase; color: var(--gold-light); margin-bottom: 1.2rem; }
.plate-night img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border: 6px solid var(--night-2); outline: 1px solid var(--rule-night); }
.plate-night figcaption { margin-top: 10px; font-size: .86rem; color: var(--on-night-muted); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--rule-night); }
.stats > div { padding: 24px 20px 26px 0; border-right: 1px solid var(--rule-night); }
.stats > div + div { padding-left: 20px; }
.stats > div:last-child { border-right: 0; }
.stat-n { display: block; font: 400 clamp(2rem, 1.4rem + 2.2vw, 3.2rem)/1 var(--font-display); color: var(--gold-light); font-feature-settings: "lnum" 1; margin-bottom: 10px; }
.stats p { margin: 0; font-size: .9rem; line-height: 1.45; color: var(--on-night); }
.stats .en { font-size: .76rem; }
.contents { border-top: 1px solid var(--rule-night); }
.contents ol { list-style: none; margin: 0; padding: 0; counter-reset: c; }
.contents li a { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr) auto; gap: 8px 16px; align-items: baseline; padding: 16px 0;
  border-bottom: 1px solid var(--rule-night); color: var(--on-night); text-decoration: none; transition: padding .25s, background .25s; }
.contents li a:hover { padding-left: 10px; background: rgba(243, 242, 242, .03); }
.contents .c-n { font: 400 1.4rem/1 var(--font-display); color: var(--gold-light); font-feature-settings: "lnum" 1; }
.contents .c-t { font: 400 var(--step-1)/1.3 var(--font-display); }
.contents .c-t .en { font-size: .8rem; margin-top: 4px; }
.contents .c-arrow { color: var(--gold-light); font-family: var(--font-display); font-size: 1.3rem; }
.contents-head { display: flex; align-items: baseline; gap: 14px; padding: 28px 0 10px; font: 400 var(--step-2)/1.2 var(--font-display); }
.contents-head .en { display: inline; font-size: .9rem; }
@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .plate-night img { aspect-ratio: 4 / 3; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats > div { padding: 20px 14px 22px 0; border-bottom: 1px solid var(--rule-night); }
  .stats > div:nth-child(2n) { border-right: 0; padding-left: 14px; }
  .stats > div:nth-child(2n+1) { padding-left: 0; }
  .stats > div:nth-last-child(-n+2) { border-bottom: 0; }
}

/* ── Layout: TOC + main ── */
.layout { max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; padding-inline: var(--gutter);
  display: grid; grid-template-columns: var(--toc-w) minmax(0, 1fr); gap: clamp(40px, 4.5vw, 72px); }
main { min-width: 0; padding-bottom: var(--gap-sec); }

.toc { position: sticky; top: calc(var(--header-h) + 28px); align-self: start; max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto; overscroll-behavior: contain; padding: 40px 6px 32px 0; scrollbar-width: thin; }
.js .toc { opacity: 0; transform: translateX(-14px); transition: opacity .5s ease, transform .5s ease; }
.js .toc.shown { opacity: 1; transform: none; }
.toc-title { font: 400 .74rem/1.3 var(--font-en); letter-spacing: .18em; text-transform: uppercase; color: var(--en); margin: 0 0 14px; display: flex; gap: 8px; align-items: baseline; }
.toc-title b { font: 500 .8rem/1 var(--font-body); letter-spacing: .12em; color: var(--ink); }
.toc-track { position: relative; padding-left: 18px; }
.toc-track::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 1px; background: var(--rule); }
.toc-fill { position: absolute; left: 0; top: 4px; width: 1px; background: var(--gold); height: 0; transition: height .15s linear; }
.toc-ch { margin-bottom: 4px; }
.toc-ch > a { display: grid; grid-template-columns: 1.9rem minmax(0, 1fr); gap: 2px 8px; padding: 8px 0; text-decoration: none; color: var(--ink-muted); transition: color .2s; }
.toc-ch > a .n { font: 400 1.05rem/1.25 var(--font-display); color: var(--gold-deep); font-feature-settings: "lnum" 1; }
.toc-ch > a .t { font: 500 .93rem/1.3 var(--font-body); }
.toc-ch > a .t .en { font-size: .72rem; margin-top: 2px; font-weight: 400; }
.toc-ch > a:hover, .toc-ch.active > a { color: var(--ink); }
.toc-ch.active > a .t { color: var(--ink); }
.toc-subs { padding: 0 0 8px 1.9rem; margin-left: 8px; display: grid; gap: 1px; }
.js .toc-subs { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s ease; padding-bottom: 0; }
.js .toc-subs > div { overflow: hidden; }
.js .toc-ch.open .toc-subs { grid-template-rows: 1fr; padding-bottom: 8px; }
.toc-subs a { display: block; position: relative; padding: 5px 0 5px 12px; font-size: .84rem; line-height: 1.32; color: var(--ink-muted); text-decoration: none; border-left: 1px solid transparent; }
.toc-subs a .en { font-size: .7rem; margin-top: 1px; }
.toc-subs a:hover { color: var(--ink); }
.toc-subs a.active { color: var(--ink); border-left-color: var(--gold); }
.toc-subs a.active::before { content: ""; position: absolute; left: -4px; top: 50%; width: 7px; height: 7px; margin-top: -3.5px; border-radius: 50%; background: var(--gold); }
.toc-foot { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--rule); font-size: .84rem; }
.toc-foot a { text-decoration: none; display: block; padding: 4px 0; }
.toc-close { display: none; }
.scrim { display: none; }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 1fr; }
  .toc-btn { display: inline-flex; }
  .head-link { display: none; }
  .now.on { display: block; }
  .toc { position: fixed; z-index: 80; top: 0; left: 0; bottom: 0; width: min(360px, 88vw); max-height: none; padding: 20px 22px 32px;
    background: var(--paper); box-shadow: 18px 0 40px rgba(32, 31, 29, .18); transform: translateX(-105%); opacity: 1 !important;
    transition: transform .35s ease, visibility .35s; visibility: hidden; }
  .js .toc, .js .toc.shown { transform: translateX(-105%); }
  .toc-open .toc, .js.toc-open .toc { transform: none !important; visibility: visible; }
  .toc-close { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
  .toc-close button { appearance: none; border: 1px solid var(--rule); background: transparent; width: 42px; height: 42px; border-radius: 50%; font: 300 1.6rem/1 var(--font-display); cursor: pointer; color: var(--ink); }
  .scrim { display: block; position: fixed; inset: 0; background: rgba(20, 19, 18, .45); z-index: 70; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
  .toc-open .scrim { opacity: 1; visibility: visible; }
}
@media (max-width: 560px) {
  .brand-name i { display: none; }
  .brand-name b { font-size: .95rem; max-width: 7.6em; line-height: 1.08; }
  .brand-mark { font-size: 1rem; padding: 6px 8px 5px; }
  .head-actions .btn { display: none; }
  .toc-btn { padding: 6px 10px; }
}

/* ── Chapters & sections ── */
.chapter { margin-top: var(--gap-sec); }
.chapter:first-child { margin-top: clamp(40px, 6vw, 72px); }
.ch-head { background: var(--night); color: var(--on-night); padding: clamp(36px, 5vw, 64px) clamp(22px, 4vw, 56px); display: grid;
  grid-template-columns: minmax(0, 1fr) auto; gap: 16px 32px; align-items: end; margin-bottom: clamp(48px, 6vw, 88px); }
.ch-head h2 { font-size: var(--step-4); color: var(--on-night); }
.ch-head h2 .en { color: var(--en-night); }
.ch-head p { grid-column: 1 / -1; margin: 0; color: var(--on-night-muted); max-width: 62ch; border-top: 1px solid var(--rule-night); padding-top: 18px; }
.ch-head p .en { color: var(--en-night); font-size: .82em; margin-top: .5em; }
.ghost { font: 400 clamp(4.5rem, 2.5rem + 8vw, 10rem)/.8 var(--font-display); color: var(--gold); font-feature-settings: "lnum" 1; letter-spacing: -.02em; }
@media (max-width: 640px) { .ch-head { grid-template-columns: 1fr; } .ghost { order: -1; font-size: 4.5rem; } }

.sec { margin-top: clamp(56px, 8vw, 112px); }
.ch-head + .sec { margin-top: 0; }
.sec-head { margin-bottom: clamp(26px, 4vw, 48px); max-width: 52rem; }
.sec-head h3 { font-size: var(--step-3); }
.sec-head > p { margin-top: 1rem; font-size: var(--step-1); color: var(--ink-muted); line-height: 1.55; }
.sec-head > p.en { font-size: calc(var(--step-1) * .78); margin-top: .2rem; color: var(--en); }
.note { font-size: var(--step--1); color: var(--ink-muted); margin-top: 14px; }
.note .en { display: block; font-size: .92em; margin-top: 2px; }

/* panels — the illustration ground */
.panel { background: var(--surface); padding: clamp(20px, 3vw, 36px); }
.panel.line { background: transparent; border: 1px solid var(--rule); }
.panel.acc { background: transparent; border: 1px solid var(--gold); box-shadow: inset 0 0 0 9999px rgba(182, 130, 53, .05); }
.panel-t { font: 600 .98rem/1.3 var(--font-body); margin-bottom: 4px; }
.panel-t .en { font-weight: 400; }
.cols-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
.cols-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
.cols-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
@media (max-width: 980px) { .cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .cols-2, .cols-3 { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .cols-4 { grid-template-columns: 1fr; } }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 4.5vw, 64px); align-items: center; }
.split.flip > :first-child { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .split.flip > :first-child { order: 0; } }

/* ruled cards */
.ruled { display: grid; border-top: 1px solid var(--rule); }
.ruled > * { padding: 24px clamp(14px, 2vw, 26px) 26px; border-right: 1px solid var(--rule); }
.ruled > *:first-child { padding-left: 0; }
.ruled > *:last-child { border-right: 0; padding-right: 0; }
.ruled.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ruled.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ruled.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.night .ruled, .night .ruled > * { border-color: var(--rule-night); }
@media (max-width: 980px) {
  .ruled.c4 { grid-template-columns: 1fr 1fr; }
  .ruled.c4 > * { border-bottom: 1px solid var(--rule); }
  .ruled.c4 > *:nth-child(2n) { border-right: 0; padding-right: 0; }
  .ruled.c4 > *:nth-child(2n+1) { padding-left: 0; }
  .ruled.c4 > *:nth-last-child(-n+2) { border-bottom: 0; }
  .night .ruled.c4 > * { border-color: var(--rule-night); }
}
@media (max-width: 640px) {
  .ruled.c4, .ruled.c3, .ruled.c2 { grid-template-columns: 1fr; }
  .ruled > *, .ruled.c4 > * { padding: 20px 0 22px !important; border-right: 0; border-bottom: 1px solid var(--rule); }
  .ruled > *:last-child, .ruled.c4 > *:last-child { border-bottom: 0; }
  .night .ruled > * { border-color: var(--rule-night); }
}
.ruled h4, .card h4 { font-size: var(--step-1); font-weight: 600; margin-bottom: .45em; }
.ruled p { margin-bottom: .6em; font-size: .95rem; }
.ruled p:last-child { margin-bottom: 0; }
.idx { display: block; font: 400 1.05rem/1 var(--font-display); color: var(--gold-deep); letter-spacing: .08em; font-feature-settings: "lnum" 1; margin-bottom: 12px; }
.night .idx { color: var(--gold-light); }
.icon { width: 44px; height: 44px; stroke: var(--gold); fill: none; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 18px; }
.icon.sm { width: 30px; height: 30px; margin: 0; flex-shrink: 0; }

/* ── Illustration primitives (engraved: ink outlines, one gold fill) ── */
.ill { display: block; width: 100%; height: auto; }
.ill .k { fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ill .km { fill: none; stroke: var(--ink-muted); stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ill .g { fill: none; stroke: var(--gold); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ill .gf { fill: var(--gold); fill-opacity: .18; stroke: none; }
.ill .gs { fill: var(--gold); stroke: none; }
.ill .dash { fill: none; stroke: var(--ink-muted); stroke-width: 1.2; stroke-dasharray: 5 6; vector-effect: non-scaling-stroke; }
.ill .gdash { fill: none; stroke: var(--gold); stroke-width: 1.3; stroke-dasharray: 3 5; vector-effect: non-scaling-stroke; }
.ill .dot { fill: var(--ink-muted); }
.ill .yel { fill: #d9b54a; fill-opacity: .45; stroke: none; }
.ill .paper { fill: var(--paper); stroke: none; }

/* resin flow */
.flow { display: grid; grid-template-columns: minmax(0, 1fr) 36px minmax(0, 1fr) 36px minmax(0, 1.25fr) 36px minmax(0, 1fr); align-items: stretch; }
.flow-st { display: flex; flex-direction: column; }
.flow-art { height: 150px; display: flex; align-items: flex-end; justify-content: center; margin-bottom: 16px; }
.flow-art svg { height: 100%; width: auto; max-width: 100%; }
.flow-st h4 { font-size: 1.1rem; font-weight: 600; text-align: center; }
.flow-st h4 .en { font-weight: 400; }
.flow-st p { text-align: center; font-size: .86rem; color: var(--ink-muted); margin: 6px 0 0; }
.flow-st.hi h4 { color: var(--gold-deep); }
.flow-arr { display: flex; align-items: center; justify-content: center; padding-bottom: 80px; color: var(--gold); }
.flow-arr svg { width: 28px; height: 14px; }
.resins3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; text-align: center; }
.resins3 b { display: block; font: 600 1rem/1.2 var(--font-display); font-size: 1.12rem; }
.resins3 span { display: block; font-size: .74rem; color: var(--ink-muted); line-height: 1.35; }
.resins3 .en { font-size: .68rem; }
@media (max-width: 980px) {
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow-st { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 4px 20px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--rule); }
  .flow-st:last-child { border-bottom: 0; }
  .flow-art { grid-row: span 3; height: 110px; margin: 0; }
  .flow-st h4, .flow-st p { text-align: left; }
  .flow-st .resins3 { text-align: left; grid-column: 2; }
  .flow-arr { display: none; }
}

/* cans */
.cans { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(16px, 2.4vw, 32px); }
.cans .panel { display: flex; flex-direction: column; gap: 14px; }
.can-row { display: grid; align-items: end; gap: 6px; }
.can-row.three { grid-template-columns: 1fr 22px 1fr 22px 1fr; }
.can-row.one { grid-template-columns: minmax(0, 1fr); max-width: 120px; }
.can-row .plus { text-align: center; font: 300 1.6rem/1 var(--font-display); color: var(--ink-muted); padding-bottom: 54px; }
.can { text-align: center; }
.can svg { width: 100%; max-width: 92px; height: auto; margin: 0 auto 8px; display: block; }
.can b { display: block; font-size: .86rem; font-weight: 600; }
.can .en { font-size: .7rem; }
.outcome { display: flex; gap: 10px; align-items: flex-start; border-top: 1px solid var(--rule); padding-top: 14px; margin-top: auto; }
.outcome svg { width: 26px; height: 14px; color: var(--gold); flex-shrink: 0; margin-top: 6px; }
.outcome b { display: block; font-size: .95rem; }
.outcome span:not(.en) { display: block; font-size: .86rem; color: var(--ink-muted); }
.panel.acc .outcome { border-color: rgba(182, 130, 53, .4); }
.panel.acc .outcome b, .panel.acc .panel-t { color: var(--gold-deep); }
@media (max-width: 760px) { .cans { grid-template-columns: 1fr; } }

/* people + cost */
.crew { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 8px; }
.crew svg { width: 44px; height: 44px; fill: none; stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }
.crew .p-ink { stroke: var(--ink-muted); }
.crew .p-gold { stroke: var(--gold); stroke-width: 1.6; }
.crew .p-dash { stroke: var(--ink-muted); stroke-dasharray: 1.6 1.8; opacity: .55; }
.crew-row { padding: 14px 0; border-bottom: 1px solid var(--rule); }
.crew-row:last-child { border-bottom: 0; }
.crew-row b { font-size: .95rem; }
.crew-row.hi b { color: var(--gold-deep); }
.big { font: 400 clamp(2.8rem, 2rem + 3.5vw, 4.6rem)/1 var(--font-display); color: var(--gold); font-feature-settings: "lnum" 1; letter-spacing: -.02em; margin: 0 0 .1em; }
.night .big { color: var(--gold-light); }
.seg { display: flex; height: 44px; margin: 8px 0 6px; }
.seg i { display: block; height: 100%; }
.seg .s-ink { background: rgba(32, 31, 29, .1); border: 1px solid var(--ink); }
.seg .s-dash { border: 1.5px dashed var(--ink-muted); border-left: 0; }
.seg .s-gold { background: var(--gold); border: 1px solid var(--gold-deep); }
.seg .s-gdash { border: 1.5px dashed var(--gold); border-left: 0; }
.seg-legend { display: flex; justify-content: space-between; gap: 12px; font-size: .8rem; color: var(--ink-muted); line-height: 1.35; }
.seg-legend span:last-child { text-align: right; }
.seg-legend .en { font-size: .68rem; }
.seg-row { margin-bottom: 18px; }
.seg-row > b { font-size: .95rem; }
.seg-row.hi > b { color: var(--gold-deep); }

/* scene (factory / house) */
.scene { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 22px; align-items: center; }
.scene svg.ill { max-width: 260px; }
.feat { display: grid; gap: 14px; }
.feat li { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 12px; align-items: start; }
.feat b { display: block; font-size: .95rem; line-height: 1.3; }
.feat span:not(.en) { display: block; font-size: .85rem; color: var(--ink-muted); line-height: 1.4; }
.feat .en { font-size: .72rem; }
@media (max-width: 480px) { .scene { grid-template-columns: 1fr; } .scene svg.ill { max-width: 220px; } }

/* spray vs dip */
.vs-n { display: flex; align-items: baseline; gap: 12px; margin-top: 14px; }
.vs-n .big { font-size: clamp(2.2rem, 1.8rem + 2vw, 3.4rem); }
.vs-n.ink .big { color: var(--ink-muted); }

/* aromatic vs aliphatic */
.chem { display: grid; grid-template-columns: auto 64px auto; align-items: center; justify-content: center; gap: 8px; padding: 8px 0 18px; }
.chem svg { width: 112px; height: 112px; }
.chem .arrow { width: 64px; height: 64px; }
.chem-cap { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; text-align: center; font-size: .8rem; color: var(--ink-muted); margin-bottom: 14px; }
.chem-cap .en { font-size: .7rem; }
.fade-strip { height: 26px; border: 1px solid var(--rule); margin: 4px 0 4px; }
.fade-strip.yellowing { background: linear-gradient(90deg, #f6f3ea 0%, #efe2b8 40%, #e2c77c 100%); }
.fade-strip.stays { background: linear-gradient(90deg, #f6f3ea 0%, #f4f1e8 100%); }
.fade-axis { display: flex; justify-content: space-between; font: .7rem/1.2 var(--font-en); color: var(--en); }
.timeline { margin-top: 10px; }
.tl-row { display: grid; grid-template-columns: minmax(0, 10rem) minmax(0, 1fr); gap: 14px; align-items: center; margin-bottom: 12px; }
.tl-row .lbl { font-size: .9rem; line-height: 1.3; }
.tl-row .lbl .en { font-size: .7rem; }
.tl-bar { position: relative; height: 30px; border-left: 1px solid var(--ink); }
.tl-bar i { position: absolute; left: 0; top: 4px; bottom: 4px; background: rgba(32, 31, 29, .12); border: 1px solid var(--ink); border-left: 0; }
.tl-bar.hi i { background: var(--gold); border-color: var(--gold-deep); }
.tl-bar em { position: absolute; top: 50%; transform: translateY(-50%); font: normal 600 .86rem/1 var(--font-body); white-space: nowrap; }
.tl-axis { display: grid; grid-template-columns: minmax(0, 10rem) minmax(0, 1fr); gap: 14px; }
.tl-ticks { position: relative; height: 22px; border-top: 1px solid var(--ink); font: .72rem/1 var(--font-en); color: var(--en); }
.tl-ticks span { position: absolute; top: 6px; transform: translateX(-50%); }
.tl-ticks span::before { content: ""; position: absolute; left: 50%; top: -7px; height: 6px; width: 1px; background: var(--ink); }
@media (max-width: 520px) { .tl-row, .tl-axis { grid-template-columns: 1fr; gap: 4px; } .tl-axis > :first-child { display: none; } }

/* W1600F layer stack */
.stack { display: grid; grid-template-columns: minmax(90px, 300px) minmax(0, 1fr); column-gap: clamp(18px, 3vw, 40px); border-top: 1px solid var(--rule); }
.stack > .layer, .stack > .txt { border-bottom: 1px solid var(--rule); }
.layer { display: flex; align-items: center; padding: 14px 0; }
.layer i { display: block; width: 100%; border: 1px solid rgba(32, 31, 29, .25); }
.layer.l-top i { height: 18px; background: linear-gradient(90deg, rgba(255, 255, 255, .85) 0 50%, rgba(255, 255, 255, .55) 50% 100%); box-shadow: 0 -1px 0 rgba(255, 255, 255, .9) inset; }
.layer.l-sand i { height: 22px; background: repeating-linear-gradient(90deg, #efe9dc 0 3px, #e8e0cf 3px 5px); }
.layer.l-stain i { height: 20px; background: rgba(160, 96, 40, .55); }
.layer.l-wood i { height: 54px; background: repeating-linear-gradient(176deg, #b07a46 0 6px, #9c6a3b 6px 9px, #b8834f 9px 15px, #a06c3c 15px 18px); }
.stack .txt { padding: 14px 0; display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: 0 12px; align-items: baseline; }
.stack .txt .idx { margin: 0; }
.stack .txt h4 { font-size: 1.2rem; font-weight: 600; font-family: var(--font-display); letter-spacing: .02em; }
.stack .txt p { margin: 4px 0 0; font-size: .92rem; color: var(--ink); }
.stack .txt .en { font-size: .78rem; }
.stack .txt.wood h4 { font-weight: 400; color: var(--ink-muted); }
@media (max-width: 560px) { .stack { grid-template-columns: 70px minmax(0, 1fr); } }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
table { width: 100%; border-collapse: collapse; font-size: .93rem; font-feature-settings: "lnum" 1; }
th, td { text-align: left; vertical-align: top; padding: 13px 14px; border-bottom: 1px solid var(--rule); }
th:first-child, td:first-child { padding-left: 0; }
tr:last-child > * { border-bottom: 0; }
thead th { font-weight: 600; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; border-bottom: 1px solid var(--ink); }
thead th .en { text-transform: none; letter-spacing: .01em; font-weight: 400; }
tbody th { font-weight: 600; }
td .en, th .en { font-size: .76rem; }
.hl { background: rgba(182, 130, 53, .09); }
thead th.hl { color: var(--gold-deep); }
.wide { min-width: 760px; }
.swipe { display: none; font: .76rem/1.3 var(--font-en); color: var(--en); margin: 0 0 8px; }
@media (max-width: 760px) {
  .swipe { display: block; }
  .wide tbody th { position: sticky; left: 0; background: var(--paper); z-index: 1; box-shadow: 1px 0 0 var(--rule); min-width: 130px; max-width: 150px; }
  .wide thead th:first-child { position: sticky; left: 0; background: var(--paper); z-index: 2; }
  th, td { padding: 11px 11px; }
}
@media (max-width: 640px) {
  .compare thead { display: none; }
  .compare, .compare tbody, .compare tr, .compare th, .compare td { display: block; width: 100%; }
  .compare tr { padding: 14px 0; border-bottom: 1px solid var(--rule); }
  .compare tr:last-child { border-bottom: 0; }
  .compare tbody th { padding: 0 0 8px; border: 0; }
  .compare td { display: grid; grid-template-columns: 6.4em minmax(0, 1fr); gap: 10px; padding: 6px 0; border: 0; }
  .compare td::before { content: attr(data-l); font: .7rem/1.3 var(--font-en); letter-spacing: .06em; text-transform: uppercase; color: var(--en); padding-top: .25em; }
  .compare td.hl { padding: 8px 10px; margin-top: 4px; }
}
details.fold { border-top: 1px solid var(--rule); }
details.fold:last-of-type { border-bottom: 1px solid var(--rule); }
details.fold summary { list-style: none; cursor: pointer; padding: 18px 44px 18px 0; position: relative; font: 500 var(--step-1)/1.3 var(--font-display); }
details.fold summary::-webkit-details-marker { display: none; }
details.fold summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font: 300 1.8rem/1 var(--font-display); color: var(--gold); }
details.fold[open] summary::after { content: "–"; }
details.fold summary .en { font-size: .78rem; margin-top: 4px; }
details.fold .fold-body { padding: 0 0 26px; }

/* plates & galleries */
.plate { background: var(--surface); border: 6px solid var(--surface); outline: 1px solid var(--rule); overflow: hidden; }
.plate img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.zoom { display: block; width: 100%; height: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; }
.zoom:hover img { transform: scale(1.03); }
.r45 .plate { aspect-ratio: 4 / 5; } .r43 .plate { aspect-ratio: 4 / 3; } .r34 .plate { aspect-ratio: 3 / 4; } .r23 .plate { aspect-ratio: 2 / 3; } .r11 .plate { aspect-ratio: 1; }
figcaption { font-size: .88rem; margin-top: 10px; line-height: 1.45; }
figcaption .en { font-size: .74rem; }
.gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(10px, 1.6vw, 18px); }
.gallery.g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.gallery.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 980px) { .gallery, .gallery.g5 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .gallery.g3 { grid-template-columns: 1fr; } }
.points { border-top: 1px solid var(--rule); margin-top: 1.4em; }
.points li { padding: 13px 0 13px 26px; border-bottom: 1px solid var(--rule); position: relative; }
.points li::before { content: ""; position: absolute; left: 2px; top: 1.4em; width: 12px; height: 1px; background: var(--gold); }
.points li .en { font-size: .78rem; }
.night .points, .night .points li { border-color: var(--rule-night); }

/* swatches */
.sw-groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 4vw, 48px) clamp(24px, 3.5vw, 48px); }
@media (max-width: 860px) { .sw-groups { grid-template-columns: 1fr; } }
.sw-group h4 { display: block; border-bottom: 1px solid var(--rule); padding-bottom: 10px; margin-bottom: 16px; font-size: var(--step-1); font-weight: 600; }
.sw-group h4 .en { display: inline; margin-left: 10px; font-size: .78rem; }
.sw { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(10px, 1.6vw, 18px); }
.sw figure .plate { aspect-ratio: 2 / 3; }
.sw figcaption b { display: block; font-size: .92rem; }
.sw figcaption .d { display: block; font-size: .8rem; color: var(--ink-muted); line-height: 1.45; margin-top: 3px; }
@media (max-width: 460px) { .sw figcaption .d { display: none; } .sw figcaption b { font-size: .84rem; } }

/* tints */
.tints { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--rule); }
.tint { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 14px; align-items: center; padding: 18px 14px 18px 0; border-bottom: 1px solid var(--rule); }
.tint svg { width: 44px; height: 56px; }
.tint b { display: block; font: 600 .76rem/1.25 var(--font-en); letter-spacing: .06em; }
.tint span:not(.en) { display: block; font-size: .9rem; }
.tint .en { font-size: .72rem; }
@media (max-width: 980px) { .tints { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 400px) { .tints { grid-template-columns: 1fr; } }
.grade svg { width: 100%; max-width: 150px; height: auto; display: block; margin-bottom: 16px; }

/* contact */
.clist li { display: grid; grid-template-columns: 7em minmax(0, 1fr); gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--rule); }
.clist li > span:first-child { font: .74rem/1.3 var(--font-en); letter-spacing: .08em; text-transform: uppercase; color: var(--en); padding-top: .3em; }
.clist li > span:first-child b { display: block; font: 600 .8rem/1.3 var(--font-body); letter-spacing: .02em; text-transform: none; color: var(--ink); }
.night .clist li { border-color: var(--rule-night); }
.night .clist li > span:first-child { color: var(--en-night); }
.night .clist li > span:first-child b { color: var(--on-night); }
.addr { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 16px; }
.addr .icon { margin: 0; }
.addr h4 { font-size: var(--step-1); font-weight: 600; margin-bottom: .4em; }

.hero-fig { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(20px, 4vw, 60px); align-items: center; }
.hero-fig .big { font-size: clamp(4rem, 2.5rem + 6vw, 8rem); }
@media (max-width: 720px) { .hero-fig { grid-template-columns: 1fr; } }

.bleed { position: relative; min-height: clamp(340px, 46vw, 560px); display: flex; align-items: flex-end; overflow: hidden; background: var(--night); color: var(--on-night); }
.bleed > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.bleed::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20, 19, 18, 0) 30%, rgba(20, 19, 18, .85) 100%); }
.bleed .cap { position: relative; z-index: 1; padding: clamp(22px, 4vw, 44px); }
.bleed h4 { font-size: var(--step-2); color: var(--on-night); margin-bottom: .35em; }
.bleed h4 .en { color: #d2ccc6; }
.bleed p { margin: 0; color: #e2ded9; max-width: 60ch; }
.bleed p.en { color: #c4beb8; border-left-color: rgba(225, 173, 102, .5); margin-top: .5em; }

/* footer */
.site-footer { background: var(--night); color: var(--on-night-muted); font-size: .92rem; }
.site-footer .wrap { max-width: calc(var(--maxw) + 2 * var(--gutter)); margin: 0 auto; padding: clamp(48px, 6vw, 80px) var(--gutter) 26px; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 32px; }
.site-footer .brand { color: var(--on-night); margin-bottom: 16px; }
.site-footer .brand-mark { color: var(--gold-light); }
.site-footer .brand-name i { color: var(--en-night); }
.site-footer h5 { margin: 0 0 12px; font: 600 .76rem/1.3 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--on-night); }
.site-footer h5 .en { display: inline; margin-left: 6px; font-weight: 400; letter-spacing: .08em; font-size: .7rem; color: var(--en-night); }
.site-footer a { color: var(--on-night-muted); text-decoration: none; }
.site-footer a:hover { color: var(--gold-light); }
.site-footer p { margin: 0 0 10px; }
.site-footer .en { color: var(--en-night); }
.foot-bottom { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--rule-night); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; font-size: .8rem; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr; } }

.fab { position: fixed; right: 14px; bottom: 14px; z-index: 50; display: none; flex-direction: column; gap: 8px; }
.fab a { width: 50px; height: 50px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--paper); box-shadow: 0 6px 18px rgba(0, 0, 0, .25); text-decoration: none; font: 600 .7rem/1 var(--font-en); }
.fab a.zalo { background: var(--gold); color: var(--night); }
.fab svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.to-top { position: fixed; right: 14px; bottom: 14px; z-index: 50; width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--rule); background: var(--paper);
  color: var(--ink); display: grid; place-items: center; text-decoration: none; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; box-shadow: 0 4px 14px rgba(32, 31, 29, .12); }
.to-top.on { opacity: 1; visibility: visible; }
.to-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; }
@media (max-width: 760px) { .fab { display: flex; } .to-top { bottom: 132px; right: 16px; width: 42px; height: 42px; } }

/* lightbox */
dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: 100vw; max-height: 100vh; width: 100vw; height: 100vh; margin: 0; }
dialog.lightbox::backdrop { background: rgba(20, 19, 18, .93); }
.lb-inner { position: relative; width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 56px 16px 24px; }
.lightbox img { max-width: min(1200px, 100%); max-height: calc(100vh - 150px); width: auto; height: auto; object-fit: contain; border: 6px solid #2f2c2b; }
.lightbox p { color: #e2ded9; font-size: .92rem; margin: 14px 0 0; text-align: center; max-width: 60ch; }
.lightbox p span { display: block; font: .78rem/1.4 var(--font-en); color: #a9a29b; margin-top: 2px; }
.lightbox button { position: absolute; appearance: none; border: 1px solid rgba(243, 242, 242, .3); background: rgba(20, 19, 18, .55); color: #f3f2f2; width: 46px; height: 46px; border-radius: 50%; font: 300 1.6rem/1 var(--font-display); cursor: pointer; }
.lb-close { top: 12px; right: 12px; } .lb-prev { left: 12px; top: 50%; transform: translateY(-50%); } .lb-next { right: 12px; top: 50%; transform: translateY(-50%); }

@media (prefers-reduced-motion: no-preference) {
  .js .rise { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
  .js .rise.in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .site-header, .toc, .fab, .to-top, .scrim { display: none !important; } .layout { display: block; } }

/* W1600F cross-section + layer list */
.stack2 { align-items: center; }
.stack2 svg.ill { max-width: 520px; }
.layers { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.layers li { display: grid; grid-template-columns: 3.4rem minmax(0, 1fr); gap: 0 12px; padding: 16px 0; border-bottom: 1px solid var(--rule); align-items: baseline; }
.layers .idx { margin: 0; }
.layers h4 { font-size: 1.25rem; font-weight: 600; letter-spacing: .02em; }
.layers p { margin: 4px 0 0; font-size: .93rem; }
.layers p.en { margin-top: 6px; }
.layers li.wood h4 { font-weight: 400; color: var(--ink-muted); }
.chem { grid-template-columns: minmax(0, 112px) minmax(40px, 64px) minmax(0, 112px); }
.chem svg { width: 100%; height: auto; }
.chem .arrow { width: 100%; height: auto; }
@media (max-width: 1180px) { .toc > .toc-title { display: none; } }

/* ══ Desktop type-scale review (2026-10-16) ══
   Component text was 11–15px inside a 1000px+ column. Scale the root on
   laptops, raise the floor of every small style, use lining figures. */
/* lining figures everywhere (font: shorthands reset them; Cormorant defaults to oldstyle "W16ooF") */
*, *::before, *::after { font-variant-numeric: lining-nums !important; }
@media (min-width: 1280px) { html { font-size: 106.25%; } }   /* 17px */
@media (min-width: 1600px) { html { font-size: 112.5%; } }    /* 18px */
@media (min-width: 1280px) { :root { --toc-w: 280px; } }

span.en, small.en { font-size: .86em; }
p.en, div.en { font-size: .9em; }
.sec-head { max-width: 60rem; }
.note { font-size: .95rem; }

/* contents list in the hero: a 3-up grid on wide screens */
.contents-head { font-size: var(--step-3); padding: 40px 0 18px; }
.contents-head .en { font-size: 1.05rem; }
.contents .c-n { font-size: clamp(1.6rem, 1.2rem + 1vw, 2.4rem); }
.contents .c-t { font-size: clamp(1.35rem, 1.1rem + .9vw, 2rem); line-height: 1.2; }
.contents .c-t .en { font-size: clamp(.9rem, .85rem + .2vw, 1.05rem); margin-top: 8px; }
@media (min-width: 900px) {
  .contents ol { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--rule-night); }
  .contents li a { display: flex; flex-direction: column; gap: 14px; height: 100%; padding: 30px 28px 34px; border-right: 1px solid var(--rule-night); }
  .contents li:nth-child(3n) a { border-right: 0; }
  .contents li:nth-child(3n+1) a { padding-left: 0; }
  .contents li a:hover { padding-left: 28px; background: rgba(243, 242, 242, .04); }
  .contents li:nth-child(3n+1) a:hover { padding-left: 10px; }
  .contents .c-arrow { margin-top: auto; font-size: 1.6rem; }
}

/* table of contents (left rail) */
.toc-title, .toc-title b { font-size: .82rem; }
.toc-ch > a { grid-template-columns: 2.2rem minmax(0, 1fr); padding: 9px 0; }
.toc-ch > a .n { font-size: 1.2rem; }
.toc-ch > a .t { font-size: 1.02rem; }
.toc-ch > a .t .en { font-size: .8rem; }
.toc-subs { padding-left: 2.2rem; }
.toc-subs a { font-size: .92rem; padding: 6px 0 6px 12px; }
.toc-subs a .en { font-size: .78rem; }
.toc-foot { font-size: .9rem; }

/* hero */
.stats p { font-size: 1.02rem; }
.stats .en { font-size: .86rem; }
.kicker { font-size: .84rem; }
.plate-night figcaption { font-size: .95rem; }

/* illustrations & panels */
.panel-t { font-size: 1.1rem; }
.flow-art { height: 170px; }
.flow-st h4 { font-size: 1.25rem; }
.flow-st p { font-size: .98rem; }
.resins3 b { font-size: 1.3rem; }
.resins3 span { font-size: .86rem; }
.resins3 .en { font-size: .8rem; }
.can b { font-size: 1rem; }
.can .en { font-size: .84rem; }
.can svg { max-width: 110px; }
.outcome b { font-size: 1.05rem; }
.outcome span:not(.en) { font-size: .98rem; }
.crew svg { width: 52px; height: 52px; }
.crew-row b { font-size: 1.05rem; }
.crew-row .muted { font-size: .98rem !important; }
.seg { height: 52px; }
.seg-row > b { font-size: 1.05rem; }
.seg-legend { font-size: .92rem; }
.seg-legend .en { font-size: .8rem; }
.scene svg.ill { max-width: 300px; }
.feat b { font-size: 1.05rem; }
.feat span:not(.en) { font-size: .96rem; }
.feat .en { font-size: .84rem; }
.icon.sm { width: 34px; height: 34px; }
.feat li { grid-template-columns: 34px minmax(0, 1fr); }
.chem { grid-template-columns: minmax(0, 140px) minmax(48px, 76px) minmax(0, 140px); }
.chem-cap { font-size: .95rem; }
.chem-cap .en { font-size: .82rem; }
.fade-axis { font-size: .82rem; }
.tl-row { grid-template-columns: minmax(0, 12rem) minmax(0, 1fr); }
.tl-axis { grid-template-columns: minmax(0, 12rem) minmax(0, 1fr); }
.tl-row .lbl { font-size: 1rem; }
.tl-row .lbl .en { font-size: .82rem; }
.tl-bar { height: 36px; }
.tl-bar em { font-size: .95rem; }
.tl-ticks { font-size: .82rem; }
.vs-n span:not(.big) { font-size: 1.05rem; }

/* cards, lists, tables */
.ruled p { font-size: 1rem; }
.ruled h4, .card h4 { font-size: var(--step-2); }
.layers h4 { font-size: 1.4rem; }
.layers p { font-size: 1rem; }
.points li { font-size: 1.02rem; }
.points li .en { font-size: .86rem; }
table { font-size: 1rem; }
thead th { font-size: .82rem; }
td .en, th .en { font-size: .85rem; }
details.fold summary .en { font-size: .88rem; }
.swipe { font-size: .85rem; }
figcaption { font-size: .98rem; }
figcaption .en { font-size: .84rem; }
.sw figcaption b { font-size: 1.05rem; }
.sw figcaption .d { font-size: .9rem; }
.sw-group h4 .en { font-size: .88rem; }
.tint b { font-size: .84rem; }
.tint span:not(.en) { font-size: 1rem; }
.tint .en { font-size: .82rem; }
.tint svg { width: 50px; height: 64px; }
.tint { grid-template-columns: 50px minmax(0, 1fr); }
.clist li > span:first-child { font-size: .8rem; }
.clist li > span:first-child b { font-size: .88rem; }
.addr h4 { font-size: var(--step-2); }
.site-footer { font-size: 1rem; }
.btn { font-size: .86rem; }
.btn .en { font-size: .78rem; }
.head-link { font-size: .98rem; }
.brand-name b { font-size: 1.12rem; }
.brand-name i { font-size: .78rem; }
.now-inner { font-size: .92rem; }
@media (max-width: 560px) { .brand-name b { font-size: .95rem; } }
/* heading English sizes (re-asserted after the span.en floor above) */
h1 .en { font-size: .3em; }
h2 .en { font-size: max(.36em, 1.05rem); }
h3 .en { font-size: max(.46em, 1rem); }
h4 .en { font-size: max(.7em, .86rem); }
.toc-ch > a .t .en, .toc-subs a .en, .contents .c-t .en { font-size: inherit; }
.toc-ch > a .t .en { font-size: .8rem; } .toc-subs a .en { font-size: .78rem; }
.contents .c-t .en { font-size: clamp(.9rem, .85rem + .2vw, 1.05rem); }
.flow { grid-template-columns: minmax(0, 1fr) 36px minmax(0, 1fr) 36px minmax(0, 1.7fr) 36px minmax(0, 1fr); }
@media (max-width: 980px) { .flow { grid-template-columns: 1fr; } }
.ruled h4, .card h4 { font-size: clamp(1.3rem, 1.1rem + .55vw, 1.6rem); }
h4 .en { font-size: max(.62em, .86rem); }
/* resin list: one row per resin instead of three cramped columns */
.resins3 { grid-template-columns: 1fr; gap: 10px; text-align: left; margin-top: 8px; }
.resins3 > div { border-left: 2px solid var(--rule); padding-left: 10px; }
.resins3 > div:last-child { border-left-color: var(--gold); }
.resins3 b { display: inline; margin-right: 6px; }
.resins3 span:not(.en) { display: inline; font-size: .9rem; }
.resins3 .en { font-size: .8rem; }
@media (min-width: 981px) { .flow-st:nth-child(5) h4 { text-align: left; } }
/* workshop / home scenes: drawing above, benefits below */
.scene { grid-template-columns: 1fr; gap: 20px; }
.scene svg.ill { max-width: 280px; margin: 4px 0 6px; }
.feat { grid-template-columns: 1fr; gap: 16px; }
.ch-head a:not(.btn) { color: var(--gold-light); }
.ch-head .clist a { word-break: break-word; }
@media (max-width: 520px) { .tl-bar em { font-size: .8rem; } .tl-bar em::after { content: none; } }
@media (max-width: 400px) { .tl-bar em { font-size: .72rem; } }

/* ══ 2026-10-16 b: header addresses, clickable chapter cards ══ */
.head-addr { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 36px); }
.ha { display: grid; grid-template-columns: 26px minmax(0, auto); gap: 10px; align-items: center; text-decoration: none; color: var(--ink); }
.ha svg { width: 26px; height: 26px; fill: none; stroke: var(--gold); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.ha span { font-size: .86rem; line-height: 1.3; color: var(--ink-muted); }
.ha b { display: block; font: 600 .74rem/1.3 var(--font-body); letter-spacing: .1em; text-transform: uppercase; color: var(--ink); }
.ha b .en { display: inline; margin-left: 6px; font-weight: 400; text-transform: none; letter-spacing: .02em; font-size: .72rem; }
.ha:hover span { color: var(--gold-deep); }
@media (max-width: 1180px) { .head-addr { display: none; } }

/* chapter cards in the hero: read as buttons */
.contents li a { position: relative; cursor: pointer; transition: background .3s ease; }
.contents li a::before { content: ""; position: absolute; left: 0; top: -1px; height: 2px; width: 0; background: var(--gold-light); transition: width .4s ease; }
.contents li a:hover, .contents li a:focus-visible { background: rgba(243, 242, 242, .06); padding-left: 0; }
.contents li a:hover::before, .contents li a:focus-visible::before { width: 100%; }
.contents li a:hover .c-t, .contents li a:focus-visible .c-t { color: var(--gold-light); }
.contents .c-t { transition: color .3s ease; }
.contents .c-go { display: inline-flex; align-items: center; gap: 10px; margin-top: auto; padding-top: 6px;
  font: 600 .76rem/1 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--gold-light); }
.contents .c-go .en { display: inline; margin: 0; font-size: .74rem; font-weight: 400; letter-spacing: .04em; text-transform: none; color: var(--en-night); }
.contents .c-go .c-arrow { display: inline-grid; place-items: center; width: 34px; height: 34px; border: 1px solid rgba(225, 173, 102, .55); border-radius: 50%;
  font: 400 1.05rem/1 var(--font-body); margin: 0; transition: transform .3s ease, background .3s ease, color .3s ease; }
.contents li a:hover .c-arrow, .contents li a:focus-visible .c-arrow { transform: translateX(6px); background: var(--gold-light); color: var(--night); }
@media (min-width: 900px) {
  .contents li a, .contents li a:hover { padding: 30px 28px 32px; }
  .contents li:nth-child(3n+1) a, .contents li:nth-child(3n+1) a:hover { padding-left: 20px; }
}
@media (max-width: 899px) {
  .contents li a { grid-template-columns: 3rem minmax(0, 1fr); padding: 18px 8px 18px 0; }
  .contents .c-go { grid-column: 2; }
  .contents li a:hover { padding-left: 0; }
}
.contents { border-top: 0; }
.to-top { }
@media (max-width: 760px) { .to-top { bottom: 132px; } }

/* ══ document downloads (TDS / MSDS PDFs) ══ */
.dl { margin-top: clamp(22px, 3vw, 34px); }
.dl-t { font: 600 .82rem/1.3 var(--font-body); letter-spacing: .12em; text-transform: uppercase; color: var(--gold-deep); margin: 0 0 12px; }
.dl-t .en { display: inline; margin-left: 8px; text-transform: none; letter-spacing: .02em; font-size: .8rem; }
.dl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 12px; }
.dl-btn { display: grid; grid-template-columns: 34px minmax(0, 1fr) 30px; gap: 12px; align-items: center; padding: 14px 14px 14px 16px;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink); text-decoration: none;
  transition: border-color .25s, background .25s, transform .25s, box-shadow .25s; }
.tint .dl-btn, .panel .dl-btn { background: #fff; }
.dl-ic { width: 32px; height: 32px; fill: none; stroke: var(--gold); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.dl-tx b { display: block; font: 600 1.02rem/1.25 var(--font-body); }
.dl-tx .en { font-size: .78rem; letter-spacing: .06em; margin-top: 2px; }
.dl-go { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; border: 1px solid rgba(182, 130, 53, .5); color: var(--gold-deep);
  font: 400 1rem/1 var(--font-body); transition: background .25s, color .25s, transform .25s; }
.dl-btn:hover, .dl-btn:focus-visible { border-color: var(--gold); background: rgba(182, 130, 53, .07); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(32, 31, 29, .08); }
.dl-btn:hover .dl-go, .dl-btn:focus-visible .dl-go { background: var(--gold); color: #fff; transform: translateY(2px); }

/* ══ 2026-10-16 c: MSDS blocks always open; tables ~30% tighter ══ */
.fold { border-top: 1px solid var(--rule); padding-top: 18px; margin-top: 8px; }
.fold + .fold { margin-top: 26px; }
.fold-t { font: 500 var(--step-1)/1.3 var(--font-display); margin: 0 0 12px; }
.fold-t .en { font-size: .88rem; margin-top: 4px; }
.fold .fold-body { padding: 0 0 6px; }
th, td { padding: 9px 10px; }
th:first-child, td:first-child { padding-left: 0; }
td .en, th .en { margin-top: 1px; }
@media (max-width: 760px) { th, td { padding: 8px 8px; } th:first-child, td:first-child { padding-left: 0; } }
@media (max-width: 640px) {
  .compare tr { padding: 10px 0; }
  .compare td { padding: 4px 0; }
  .compare td.hl { padding: 6px 8px; }
  .compare tbody th { padding-bottom: 6px; }
}

/* ══ 2026-10-17: side rail on tablet / phone (replaces the header "Mục lục" button) ══
   Chapter numbers + dots for the current chapter's sections, fixed to the right edge.
   It slides to a slim tab when the reader stops scrolling; ≡ opens the full contents drawer (from the right). */
.rail, .r-label { display: none; }
@media (max-width: 1180px) {
  .to-top { display: none !important; }
  .rail { display: flex; flex-direction: column; align-items: center; position: fixed; z-index: 60; right: 6px; top: calc(50% - 10px);
    width: 36px; padding: 4px 0; border: 1px solid var(--rule); border-radius: 18px; background: rgba(243, 242, 242, .94);
    -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); box-shadow: 0 6px 22px rgba(32, 31, 29, .16);
    transform: translate(calc(100% + 12px), -50%); opacity: 0; visibility: hidden;
    transition: transform .35s ease, opacity .35s ease, visibility .35s; }
  .rail.on { transform: translate(0, -50%); opacity: 1; visibility: visible; }
  /* resting: tucked against the edge, a gold handle stays visible */
  .rail.on.idle { transform: translate(calc(100% - 11px), -50%); }
  .rail::before { content: ""; position: absolute; left: 3px; top: 50%; width: 3px; height: 34px; margin-top: -17px; border-radius: 2px;
    background: var(--gold); opacity: 0; transition: opacity .3s; }
  .rail.idle::before { opacity: 1; }
  .rail::after { content: ""; position: absolute; top: -8px; bottom: -8px; left: -22px; width: 22px; }   /* wider touch area while tucked */
  .rail.idle > * { opacity: 0; }
  .rail > * { transition: opacity .3s; }
  .rail a, .rail button { -webkit-tap-highlight-color: transparent; }

  .r-top, .r-menu { display: grid; place-items: center; width: 36px; height: 36px; color: var(--ink); text-decoration: none;
    appearance: none; border: 0; background: transparent; padding: 0; cursor: pointer; }
  .r-top svg, .r-menu svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; }
  .r-top { border-bottom: 1px solid var(--rule); }
  .r-menu { border-top: 1px solid var(--rule); }
  .r-list { position: relative; display: flex; flex-direction: column; align-items: center; padding: 4px 0; }
  .r-list::before { content: ""; position: absolute; top: 14px; bottom: 14px; left: 50%; width: 1px; background: var(--rule); }

  .r-ch { position: relative; display: grid; place-items: center; width: 36px; height: 32px; text-decoration: none; }
  .r-ch span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; border: 1px solid var(--rule); background: var(--paper);
    font: 600 .66rem/1 var(--font-en); letter-spacing: .02em; color: var(--ink-muted); transition: background .25s, color .25s, border-color .25s, transform .25s; }
  .r-ch.done span { color: var(--gold-deep); border-color: rgba(182, 130, 53, .55); }
  .r-ch.active span { background: var(--gold); border-color: var(--gold); color: var(--night); transform: scale(1.12); }

  .r-subs { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s ease; }
  .r-subs.open { grid-template-rows: 1fr; }
  .r-subs > div { min-height: 0; overflow: hidden; }
  .r-subs:not(.open) > div { visibility: hidden; transition: visibility 0s .3s; }
  .r-subs { overflow: hidden; }
  .r-sub { position: relative; display: grid; place-items: center; width: 36px; height: 21px; }
  .r-sub i { display: block; width: 6px; height: 6px; border-radius: 50%; background: var(--paper); border: 1px solid rgba(32, 31, 29, .38); transition: all .25s; }
  .r-sub.done i { background: rgba(182, 130, 53, .55); border-color: transparent; }
  .r-sub.active i { width: 10px; height: 10px; background: var(--gold); border-color: var(--gold); box-shadow: 0 0 0 3px var(--gold-wash); }

  /* name of the current chapter / section, shown beside the rail for a moment */
  .r-label { display: flex; align-items: baseline; gap: 8px; position: fixed; z-index: 61; right: 52px; max-width: min(62vw, 300px);
    padding: 8px 12px 8px 11px; background: var(--ink); color: var(--paper); border-radius: 3px; box-shadow: 0 6px 20px rgba(32, 31, 29, .22);
    font: 400 .84rem/1.25 var(--font-body); transform: translate(8px, -50%); opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity .25s, transform .25s, visibility .25s; }
  .r-label.on { opacity: 1; visibility: visible; transform: translate(0, -50%); }
  .r-label b { font: 400 1rem/1 var(--font-display); color: var(--gold-light); }
  .r-label .en { display: block; margin: 2px 0 0; padding: 0; border: 0; font: 400 .7rem/1.25 var(--font-en); color: var(--on-night-muted); }
  .r-label::after { content: ""; position: absolute; right: -5px; top: 50%; margin-top: -5px; border: 5px solid transparent; border-right: 0; border-left-color: var(--ink); }

  /* contents drawer now slides in from the right, next to the rail */
  .toc { left: auto; right: 0; transform: translateX(105%); box-shadow: -18px 0 40px rgba(32, 31, 29, .18); }
  .js .toc, .js .toc.shown { transform: translateX(105%); }
  .toc-open .rail { opacity: 0; visibility: hidden; }
}
@media (max-width: 1180px) and (max-height: 560px) { .r-subs { display: none; } }
@media (prefers-reduced-motion: reduce) { .rail, .r-label, .r-subs { transition: none; } }

/* ══ hero blocks (2026-10-18, from katinlove.vn): "Điểm nổi bật" and "Khám phá" as two separate, labelled blocks ══
   Markup: templates/hero-blocks.html. Uses only theme tokens, so it works on light and dark palettes.
   Key rule: big gold numerals ONLY in the highlights; contents use a small numbered chip + arrow. */
.block-label { display: flex; align-items: center; gap: 14px; margin: 0 0 18px; font: 600 .8rem/1.2 var(--font-en); letter-spacing: .2em; text-transform: uppercase; color: var(--gold-light); }
.block-label::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, color-mix(in srgb, var(--gold) 45%, transparent), transparent); }

.usp { margin-top: clamp(8px, 2vw, 20px); }
.usp .stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(10px, 1.4vw, 18px); border: 0; }
.usp .stats > div { position: relative; padding: 22px !important; border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent) !important; border-radius: 16px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--gold) 10%, transparent), color-mix(in srgb, var(--gold) 2%, transparent) 60%); }
.usp-ic { position: absolute; top: 18px; right: 18px; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center;
  background: color-mix(in srgb, var(--gold) 14%, transparent); color: var(--gold-light); }
.usp-ic svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.usp .stat-n { margin-bottom: 8px; }
.usp .stats p { color: var(--on-night-muted); font-size: .98rem; max-width: 16em; }
@media (max-width: 900px) {
  .usp .stats { grid-template-columns: 1fr 1fr; }
  .usp .stats > div { padding: 18px !important; }
  .usp-ic { width: 34px; height: 34px; top: 14px; right: 14px; }
}

.hero .contents { margin-top: clamp(44px, 6vw, 72px); border: 0; }
.hero .contents ol { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(10px, 1.2vw, 16px); border: 0; }
/* :nth-child(n) beats the older "li:nth-child(3n+1) a" padding rules, so every tile lines up */
.hero .contents li:nth-child(n) a, .hero .contents li:nth-child(n) a:hover {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 16px; height: 100%;
  padding: 18px; border: 1px solid var(--rule-night) !important; border-radius: 12px; background: var(--night-2);
  transition: border-color .25s, background .25s, transform .25s; }
.hero .contents li a::before { display: none; }
.hero .contents li a:hover, .hero .contents li a:focus-visible { border-color: var(--gold) !important; transform: translateY(-2px); }
.hero .contents .c-n { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
  font: 500 .95rem/1 var(--font-en) !important; color: var(--gold-light); }
.hero .contents .c-t { font-size: clamp(1.15rem, 1rem + .4vw, 1.4rem) !important; line-height: 1.25; }
.hero .contents .c-go { grid-column: auto; margin: 0; padding: 0; font-size: 0; gap: 0; }
.hero .contents .c-go .c-arrow { width: 34px; height: 34px; font-size: 1rem; }
@media (max-width: 899px) { .hero .contents ol { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) {
  .hero .contents ol { grid-template-columns: 1fr; gap: 8px; }
  .hero .contents li:nth-child(n) a, .hero .contents li:nth-child(n) a:hover { padding: 12px 14px; gap: 12px; }
  .hero .contents .c-n { width: 34px; height: 34px; }
}
/* VSP: bilingual block labels + EN line inside the highlight cards */
.block-label .en { display: inline; margin: 0; font: 400 .78rem/1.2 var(--font-en); letter-spacing: .04em; text-transform: none; color: var(--en-night); }
.usp .stats p .en { display: block; margin-top: 4px; font-size: .82rem; }
@media (max-width: 900px) { .usp .stat-n { padding-right: 40px; } }
.usp .stat-n sub { font-size: .5em; line-height: 0; vertical-align: -.12em; margin: 0 .02em; }
/* 2026-10-18 b: −40% card gets a label + smaller note; long descriptions swap to short ones on phones only */
.usp .stats p.usp-note { margin-top: 10px; padding-top: 10px; border-top: 1px solid color-mix(in srgb, var(--gold) 22%, transparent); font-size: .86rem; color: var(--en-night); }
.usp .stats p.usp-note .en { font-size: .76rem; }
.usp .d-short { display: none; }
@media (max-width: 560px) {
  .usp .d-long { display: none; }
  .usp .d-short { display: block; }
}