/*
  Jinhui Nonferrous Metals — quiet luxury corporate site
  Do not invent certifications, licenses, capacity, or contact details.
*/

:root {
  --paper: #f3efe8;
  --paper-2: #e9e2d6;
  --ink: #161412;
  --muted: #5c5851;
  --line: #d2cbbf;
  --copper: #9a5c2e;
  --copper-deep: #6e3d1c;
  --copper-soft: #c4a07a;
  --ink-band: #1c1916;
  --max: 68rem;
  --header-h: 4.25rem;
  --pad: 1.15rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", "IBM Plex Sans Thai", "Noto Sans SC", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

html[lang="th"] body {
  font-family: "IBM Plex Sans Thai", "IBM Plex Sans", sans-serif;
  line-height: 1.8;
}

html[lang="zh-Hans"] body {
  font-family: "Noto Sans SC", "IBM Plex Sans", sans-serif;
}

h1,
h2,
h3,
.brand-name {
  font-family: "Newsreader", "Noto Serif Thai", "Noto Serif SC", Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.02em;
}

h1,
h2,
h3 {
  overflow-wrap: anywhere;
}

html[lang="th"] h1,
html[lang="th"] h2,
html[lang="th"] h3,
html[lang="th"] .brand-name {
  font-family: "Noto Serif Thai", Georgia, serif;
}

html[lang="zh-Hans"] h1,
html[lang="zh-Hans"] h2,
html[lang="zh-Hans"] h3,
html[lang="zh-Hans"] .brand-name {
  font-family: "Noto Serif SC", Georgia, serif;
}

img,
svg,
iframe,
video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--ink);
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--copper);
}

:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.8rem;
  text-decoration: none;
}

.skip:focus {
  top: 0.75rem;
}

body.is-locked {
  overflow: hidden;
  touch-action: none;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--paper);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled,
.site-header.is-open {
  border-bottom-color: var(--line);
}

.header-inner {
  position: relative;
  z-index: 91;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.7rem max(var(--pad), env(safe-area-inset-right)) 0.7rem max(var(--pad), env(safe-area-inset-left));
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
  margin-right: auto;
}

.brand:hover {
  color: inherit;
}

.brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  flex: 0 0 auto;
}

.brand-name {
  font-size: 0.95rem;
  line-height: 1.25;
  letter-spacing: 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.nav-toggle {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--paper);
  color: transparent;
  font-size: 0;
  cursor: pointer;
  position: relative;
  z-index: 90;
  flex: 0 0 auto;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 0.95rem;
  height: 1px;
  background: var(--ink);
  transition: transform 0.25s ease, top 0.25s ease;
}

.nav-toggle::before {
  top: calc(50% - 3px);
  transform: translateX(-50%);
}

.nav-toggle::after {
  top: calc(50% + 3px);
  transform: translateX(-50%);
}

.site-header.is-open .nav-toggle::before {
  top: 50%;
  transform: translateX(-50%) rotate(45deg);
}

.site-header.is-open .nav-toggle::after {
  top: 50%;
  transform: translateX(-50%) rotate(-45deg);
}

.lang-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: baseline;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.lang-switch a {
  text-decoration: none;
  color: var(--muted);
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.lang-switch a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
}

.site-nav {
  display: none;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-scrim {
  display: none;
}

@media (max-width: 1023px) {
  .header-inner {
    background: var(--paper);
  }

  .brand {
    position: relative;
    z-index: 92;
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(26, 25, 23, 0.32);
    opacity: 0;
    pointer-events: none;
    z-index: 70;
    transition: opacity 0.3s ease;
  }

  body.nav-open .nav-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;
    width: min(22rem, 88vw);
    padding: calc(var(--header-h) + 0.5rem) 1.5rem max(2rem, env(safe-area-inset-bottom));
    background: var(--paper);
    border-left: 1px solid var(--line);
    transform: translateX(105%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.35s ease, visibility 0.35s ease;
    z-index: 85;
    gap: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }

  .site-header.is-open .site-nav,
  body.nav-open .site-nav {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav > a {
    display: flex;
    align-items: center;
    min-height: 3rem;
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.2rem;
    font-family: "Newsreader", "Noto Serif Thai", "Noto Serif SC", Georgia, serif;
  }

  html[lang="th"] .site-nav > a {
    font-family: "Noto Serif Thai", Georgia, serif;
  }

  html[lang="zh-Hans"] .site-nav > a {
    font-family: "Noto Serif SC", Georgia, serif;
  }

  .site-nav > a[aria-current="page"] {
    color: var(--ink);
    box-shadow: inset 2px 0 0 var(--copper);
    padding-left: 0.75rem;
  }

  .site-nav .lang-switch {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 1024px) {
  .nav-toggle,
  .nav-scrim {
    display: none;
  }

  .site-header {
    background: rgba(243, 239, 232, 0.92);
    backdrop-filter: blur(12px);
  }

  .header-inner {
    padding: 0.9rem 1.5rem;
    gap: 1rem;
  }

  .brand-mark {
    width: 2.25rem;
    height: 2.25rem;
  }

  .brand-name {
    font-size: 1rem;
    -webkit-line-clamp: unset;
    display: block;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 1.35rem;
    order: 2;
  }

  .site-nav .lang-switch {
    margin-left: 0.35rem;
    padding-left: 1.15rem;
    border-left: 1px solid var(--line);
    gap: 0.55rem;
  }

  .site-nav .lang-switch a {
    min-height: 0;
  }

  .site-nav > a[aria-current="page"] {
    box-shadow: inset 0 -1px 0 var(--ink);
  }
}

@media (min-width: 1200px) {
  .site-nav {
    gap: 1.6rem;
  }
}

/* Layout */

.page {
  flex: 1;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 max(var(--pad), env(safe-area-inset-right)) 4rem max(var(--pad), env(safe-area-inset-left));
}

.hero {
  padding: 2.25rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.hero-split {
  display: grid;
  gap: 1.5rem;
  align-items: end;
}

@media (min-width: 800px) {
  .hero-split {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 2.5rem;
    align-items: center;
    padding-top: 2.75rem;
    padding-bottom: 2.5rem;
  }
}

.hero h1 {
  margin: 0 0 1rem;
  max-width: 18ch;
  font-size: clamp(2rem, 8.5vw, 4.1rem);
  line-height: 1.12;
  font-weight: 400;
}

.lede {
  margin: 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-head {
  padding: 2.25rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.page-head h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.85rem, 7vw, 3.4rem);
  font-weight: 400;
  line-height: 1.15;
}

.page-head .lede {
  margin-top: 0.5rem;
}

.section {
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--line);
}

.section:last-of-type {
  border-bottom: 0;
}

.section h2 {
  margin: 0 0 1.15rem;
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 400;
}

.prose {
  max-width: 40rem;
}

.prose p {
  margin: 0 0 1.1rem;
  color: var(--muted);
}

.prose p:last-child {
  margin-bottom: 0;
}

@media (min-width: 768px) {
  .wrap {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    padding-bottom: 5rem;
  }

  .hero {
    padding: 3.25rem 0 2.75rem;
  }

  .hero-actions {
    margin-top: 1.75rem;
  }

  .lede {
    font-size: 1.12rem;
  }

  .page-head {
    padding: 3rem 0 1.75rem;
  }

  .section {
    padding: 2.85rem 0;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 4.5rem 0 3.5rem;
  }

  .hero-actions {
    margin-top: 2rem;
  }

  .page-head {
    padding: 3.5rem 0 2rem;
  }

  .section {
    padding: 3.25rem 0;
  }

  .section h2 {
    margin-bottom: 1.5rem;
  }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  font-family: inherit;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.28s ease, color 0.28s ease, border-color 0.28s ease;
}

.btn:hover {
  background: transparent;
  color: var(--ink);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
}

.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

@media (max-width: 479px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* Work / services */

.work-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.work-list li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.work-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

@media (min-width: 768px) and (max-width: 1023px) {
  .work-list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1024px) {
  .work-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .work-list li {
    padding: 0 1.5rem 0 0;
    border-top: 0;
    border-right: 1px solid var(--line);
  }

  .work-list li:first-child {
    padding-top: 0;
  }

  .work-list li:last-child {
    padding-right: 0;
    padding-left: 1.5rem;
    border-right: 0;
  }

  .work-list li:nth-child(2) {
    padding-left: 1.5rem;
  }
}

.work-list .num {
  display: block;
  margin-bottom: 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.work-list h3 {
  margin: 0 0 0.55rem;
  font-size: 1.2rem;
}

.work-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Metals index */

.metal-index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.metal-index li {
  border-top: 1px solid var(--line);
}

.metal-index li:first-child {
  border-top: 0;
}

.metal-index a {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  grid-template-areas:
    "sym name"
    "sym use";
  gap: 0.15rem 1rem;
  padding: 1rem 0;
  text-decoration: none;
  align-items: baseline;
  min-height: 3.25rem;
}

.metal-index .sym {
  grid-area: sym;
  font-family: "Newsreader", "Noto Serif SC", Georgia, serif;
  color: var(--copper);
  font-size: 1.05rem;
}

.metal-index .name {
  grid-area: name;
  font-weight: 500;
}

.metal-index .use {
  grid-area: use;
  color: var(--muted);
  font-size: 0.92rem;
}

.metal-index .more {
  display: none;
  grid-area: more;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.metal-index a:hover .more {
  color: var(--copper);
}

@media (min-width: 600px) {
  .metal-index a {
    grid-template-columns: 3rem 1fr auto;
    grid-template-areas:
      "sym name more"
      "sym use use";
    gap: 0.15rem 1.25rem;
    padding: 1.05rem 0;
  }

  .metal-index .more {
    display: block;
    align-self: start;
    padding-top: 0.15rem;
  }
}

@media (min-width: 900px) {
  .metal-index a {
    grid-template-columns: 3rem 10rem 1fr auto;
    grid-template-areas: "sym name use more";
    align-items: baseline;
  }

  .metal-index .more {
    padding-top: 0;
  }
}

/* Steps */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.steps .num {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.steps h3 {
  margin: 0 0 0.45rem;
  font-size: 1.15rem;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

@media (min-width: 768px) and (max-width: 1023px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

@media (min-width: 1024px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

/* Plant teaser */

.plant-split {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .plant-split {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .plant-split {
    gap: 3rem;
  }
}

.frame {
  min-height: 12rem;
  border: 1px solid var(--line);
  background: var(--paper-2);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1.5rem;
}

.gallery {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 600px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

.gallery .frame {
  min-height: 11rem;
}

@media (min-width: 768px) {
  .frame {
    min-height: 14rem;
  }

  .gallery .frame {
    min-height: 12rem;
  }
}

/* Catalog */

.catalog-block {
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}

.catalog-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.catalog-block header {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 0.7rem;
}

.catalog-block .sym {
  color: var(--copper);
  font-size: 1.2rem;
}

.catalog-block h3 {
  margin: 0;
  font-size: 1.3rem;
}

.catalog-block p {
  margin: 0 0 0.6rem;
  max-width: 40rem;
  color: var(--muted);
}

.catalog-note {
  font-size: 0.92rem;
  color: var(--ink);
}

@media (min-width: 768px) {
  .catalog-block {
    padding: 2rem 0;
  }

  .catalog-block h3 {
    font-size: 1.45rem;
  }
}

/* Inquire band */

.inquire {
  padding: 2.25rem 0 0;
}

.inquire p {
  margin: 0 0 1.1rem;
  max-width: 36rem;
  color: var(--muted);
}

.inquire-band {
  background: var(--ink-band);
  color: var(--paper);
  margin-top: 2.5rem;
  padding: 2.75rem max(var(--pad), env(safe-area-inset-right)) 2.75rem max(var(--pad), env(safe-area-inset-left));
}

.inquire-band > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.inquire-band h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
}

.inquire-band p {
  color: #c9c3ba;
}

.inquire-band .btn {
  background: var(--copper);
  border-color: var(--copper);
  color: var(--paper);
}

.inquire-band .btn:hover {
  background: transparent;
  color: var(--paper);
  border-color: var(--paper);
}

@media (min-width: 768px) {
  .inquire {
    padding-top: 3rem;
  }

  .inquire-band {
    padding-top: 3.75rem;
    padding-bottom: 3.75rem;
  }
}

/* Legal details (About, last) */

.legal-details {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--muted);
}

.legal-details h2 {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: inherit;
  font-weight: 500;
}

.legal-details dl {
  margin: 0;
}

.legal-details div {
  display: grid;
  gap: 0.15rem;
  padding: 0.45rem 0;
}

@media (min-width: 640px) {
  .legal-details div {
    grid-template-columns: 11rem 1fr;
  }
}

.legal-details dt {
  margin: 0;
}

.legal-details dd {
  margin: 0;
  overflow-wrap: anywhere;
}

/* Contact */

.include-list {
  margin: 0;
  padding: 0 0 0 1.1rem;
  color: var(--muted);
}

.include-list li {
  margin-bottom: 0.35rem;
}

.contact-layout {
  display: grid;
  gap: 2rem;
  padding: 2rem 0 0;
}

@media (min-width: 1024px) {
  .contact-layout {
    grid-template-columns: 1fr 1.15fr;
    gap: 3.5rem;
    align-items: start;
    padding-top: 2.5rem;
  }
}

.map-wrap {
  margin-top: 2rem;
  border: 1px solid var(--line);
  overflow: hidden;
}

.map-wrap iframe {
  display: block;
  width: 100%;
  height: 14rem;
  border: 0;
  filter: grayscale(1) contrast(1.05);
}

@media (min-width: 600px) {
  .map-wrap iframe {
    height: 18rem;
  }
}

@media (min-width: 900px) {
  .map-wrap {
    margin-top: 2.5rem;
  }

  .map-wrap iframe {
    height: 22rem;
  }
}

.map-caption {
  margin: 0;
  padding: 0.65rem 0.9rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.form {
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 640px) {
  .form {
    grid-template-columns: 1fr 1fr;
  }

  .form .form-status,
  .form label:nth-of-type(7),
  .form .btn {
    grid-column: 1 / -1;
  }
}

.form label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.form input,
.form textarea,
.form select {
  font: inherit;
  font-size: 16px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 0.7rem 0;
  width: 100%;
  min-height: 2.75rem;
  appearance: none;
  border-radius: 0;
}

.form select {
  cursor: pointer;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 14px) calc(50% - 1px),
    calc(100% - 9px) calc(50% - 1px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.75rem;
}

.form textarea {
  min-height: 7.5rem;
  resize: vertical;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-bottom-color: var(--ink);
}

.form .error {
  color: #7a2e16;
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: none;
}

.form [aria-invalid="true"] {
  border-bottom-color: #7a2e16;
}

.form-status {
  margin: 0;
  font-size: 0.92rem;
}

.form-status.is-success {
  color: #2a4a28;
}

.form .req {
  color: var(--copper);
}

/* Footer */

.site-footer {
  margin-top: auto;
  background: var(--ink-band);
  border-top: 0;
  padding: 2rem max(var(--pad), env(safe-area-inset-right)) max(2.25rem, env(safe-area-inset-bottom)) max(var(--pad), env(safe-area-inset-left));
  font-size: 0.8rem;
  color: #b7b0a6;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .footer-inner {
    grid-template-columns: 1.4fr 1fr;
    gap: 2.5rem;
    align-items: start;
  }

  .site-footer {
    padding: 2.25rem 1.5rem 2.5rem;
  }
}

.footer-legal {
  display: grid;
  gap: 0.3rem;
}

.site-footer strong {
  color: var(--paper);
  font-weight: 500;
  font-family: "Newsreader", "Noto Serif Thai", "Noto Serif SC", Georgia, serif;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-nav a {
  color: #c9c3ba;
  text-decoration: none;
}

.footer-nav a:hover,
.footer-nav a[aria-current="page"] {
  color: var(--copper-soft);
}

.site-footer .copy {
  margin-top: 0.85rem;
  grid-column: 1 / -1;
}

/* Visuals */

.visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.03);
  filter: saturate(0.92) contrast(1.04);
  transition: transform 1.1s ease, filter 0.55s ease;
}

.visual:hover img {
  transform: scale(1.08);
  filter: saturate(1.05) contrast(1.06);
}

.visual figcaption,
.caption {
  margin: 0;
  padding: 0.55rem 0.8rem;
  font-size: 0.75rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.hero-visual {
  min-height: 14rem;
  aspect-ratio: 16 / 10;
}

@media (min-width: 800px) {
  .hero-visual {
    min-height: 22rem;
    aspect-ratio: auto;
    height: 26rem;
  }
}

.metal-mosaic {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

@media (min-width: 700px) {
  .metal-mosaic {
    grid-template-columns: repeat(4, 1fr);
  }

  .metal-mosaic li:first-child {
    grid-column: span 2;
  }

  .metal-mosaic li:first-child a,
  .metal-mosaic li:first-child img {
    min-height: 18rem;
  }
}

.metal-mosaic a {
  display: block;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--paper);
  min-height: 8.5rem;
  height: 100%;
}

.metal-mosaic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  min-height: 8.5rem;
  filter: saturate(0.9);
  transform: scale(1.04);
  transition: transform 0.8s ease, filter 0.4s ease;
}

.metal-mosaic a::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(22, 20, 18, 0.72) 100%);
  transition: background 0.35s ease;
}

.metal-mosaic a:hover img {
  transform: scale(1.1);
  filter: saturate(1.08);
}

.metal-mosaic span {
  position: absolute;
  left: 0.7rem;
  bottom: 0.65rem;
  z-index: 1;
  font-family: "Newsreader", "Noto Serif Thai", "Noto Serif SC", Georgia, serif;
  font-size: 1.05rem;
}

.use-grid,
.audience-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

@media (min-width: 700px) {
  .use-grid,
  .audience-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .use-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .audience-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.use-grid li,
.audience-grid li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

@media (min-width: 700px) {
  .use-grid li,
  .audience-grid li {
    padding: 1.25rem 1.25rem 1.25rem 0;
    border-right: 1px solid var(--line);
  }

  .use-grid li:nth-child(2n),
  .audience-grid li:nth-child(2n) {
    padding-right: 0;
    padding-left: 1.25rem;
    border-right: 0;
  }
}

@media (min-width: 1024px) {
  .use-grid li:nth-child(2n),
  .audience-grid li:nth-child(2n) {
    padding: 1.25rem 1.25rem 1.25rem 0;
    border-right: 1px solid var(--line);
  }

  .use-grid li:nth-child(4n),
  .audience-grid li:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .use-grid li:not(:first-child),
  .audience-grid li:not(:first-child) {
    padding-left: 1.25rem;
  }

  .use-grid li:nth-child(4n + 1),
  .audience-grid li:first-child {
    padding-left: 0;
  }
}

.use-grid h3,
.audience-grid h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.use-grid p,
.audience-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.fact-band {
  display: grid;
  gap: 1rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 640px) {
  .fact-band {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.fact-band span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 0.35rem;
}

.fact-band strong {
  font-family: "Newsreader", "Noto Serif Thai", "Noto Serif SC", Georgia, serif;
  font-size: 1.65rem;
  font-weight: 400;
}

.split-visual {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .split-visual {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
  }
}

.catalog-media {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .catalog-media {
    grid-template-columns: 10.5rem 1fr;
    gap: 1.5rem;
    align-items: start;
  }
}

.catalog-thumb {
  aspect-ratio: 4 / 3;
  min-height: 7.5rem;
}

.gallery .visual {
  min-height: 12rem;
}

.gallery .visual img {
  min-height: 12rem;
  aspect-ratio: 16 / 11;
}

.page-head-visual {
  margin-top: 1.5rem;
  aspect-ratio: 16 / 7;
  min-height: 10rem;
}

@media (min-width: 768px) {
  .page-head-visual {
    min-height: 14rem;
  }
}

.metal-index a {
  transition: background 0.25s ease, padding 0.25s ease;
}

.metal-index a:hover {
  background: var(--paper-2);
}

.reveal {
  opacity: 0;
  transform: translateY(1.15rem);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--d, 0s);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .visual img,
  .metal-mosaic img {
    transform: none;
  }
}