/* ==========================================================================
   RENEWAY TRACK MACHINERY — reneway.cn
   Design system: industrial / engineering documentation
   Palette and logo usage follow RENEWAY TRACK MACHINERY Logo Book v1.0
   ========================================================================== */

/* --- Fonts (self-hosted, SIL Open Font License) ------------------------- */
@font-face { font-family: 'Archivo'; src: url('../fonts/archivo-var.woff2') format('woff2'); font-weight: 100 900; font-style: normal; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('../fonts/inter-var.woff2') format('woff2'); font-weight: 100 900; font-style: normal; font-display: swap; }

/* --- Tokens ------------------------------------------------------------- */
:root {
  --graphite: #1F2429;
  --graphite-deep: #141A1F;
  --graphite-soft: #2A3238;
  --bronze: #B79B7A;
  --bronze-ink: #8A6F4E;
  --stone: #9AA0A6;
  --light: #F5F6F7;
  --white: #FFFFFF;

  --ink: #1F2429;
  --ink-body: #4C5359;
  --ink-muted: #6E757B;
  --line: #E1E4E7;
  --line-strong: #CFD4D8;

  --ink-on-dark: #EAEDEF;
  --ink-on-dark-muted: #A8AFB5;
  --line-on-dark: rgba(255, 255, 255, 0.14);

  --font-display: 'Archivo', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --shell: 1240px;
  --gutter: clamp(1.25rem, 4.5vw, 3.5rem);
  --section-y: clamp(4.5rem, 9vw, 8.5rem);
  --radius: 2px;
  --radius-lg: 4px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 76px;
}

/* --- Reset -------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink-body);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.68;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); color: var(--ink); font-weight: 800; letter-spacing: -0.015em; line-height: 1.04; text-transform: uppercase; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--bronze-ink); outline-offset: 3px; }
.section--dark :focus-visible, .site-footer :focus-visible, .hero :focus-visible { outline-color: var(--bronze); }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip-link {
  position: absolute; left: 1rem; top: -100px; z-index: 100;
  background: var(--graphite); color: var(--white); padding: 0.7rem 1.1rem;
  font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

.shell { width: min(var(--shell), 100% - (var(--gutter) * 2)); margin-inline: auto; }

/* --- Type helpers ------------------------------------------------------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 400;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--bronze-ink);
  margin-bottom: 1.1rem;
}
.eyebrow::before { content: ''; width: 28px; height: 1px; background: currentColor; opacity: 0.75; }
.eyebrow--dark { color: var(--bronze); }

.section-head { max-width: 62ch; margin-bottom: clamp(2.5rem, 4vw, 3.75rem); }
.section-title { font-size: clamp(1.85rem, 3.4vw, 2.9rem); }
.section-kicker {
  margin-top: 1rem; font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1rem, 1.5vw, 1.2rem); color: var(--ink); letter-spacing: -0.005em;
}
.section-intro { margin-top: 0.85rem; color: var(--ink-muted); max-width: 58ch; }
.section-head--dark .section-title, .section-head--dark .section-kicker { color: var(--ink-on-dark); }
.section-head--dark .section-intro { color: var(--ink-on-dark-muted); }
.lede { font-size: clamp(1.05rem, 1.45vw, 1.22rem); color: var(--ink); line-height: 1.6; }
.link { color: var(--ink-body); border-bottom: 1px solid var(--line-strong); transition: color 0.2s var(--ease), border-color 0.2s var(--ease); }
.link:hover { color: var(--bronze-ink); border-color: currentColor; }
.link--strong { color: var(--ink); font-weight: 500; }
.section--dark .link, .site-footer .link { border-color: var(--line-on-dark); color: var(--ink-on-dark); }
.section--dark .link:hover, .site-footer .link:hover { color: var(--bronze); }

/* --- Buttons ------------------------------------------------------------ */
.btn {
  --btn-bg: var(--graphite); --btn-fg: var(--white); --btn-bd: var(--graphite);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 0.95rem 1.6rem; border: 1px solid var(--btn-bd); background: var(--btn-bg); color: var(--btn-fg);
  font-family: var(--font-display); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; border-radius: var(--radius);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { --btn-bg: var(--bronze); --btn-fg: var(--graphite); --btn-bd: var(--bronze); }
.btn--primary:hover { --btn-bg: #C7AC8C; --btn-bd: #C7AC8C; }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink-on-dark); --btn-bd: rgba(255,255,255,0.34); }
.btn--ghost:hover { --btn-bd: var(--bronze); --btn-fg: var(--bronze); }
.btn--outline { --btn-bg: transparent; --btn-fg: var(--ink); --btn-bd: var(--line-strong); }
.btn--outline:hover { --btn-bd: var(--ink); }
.btn--sm { padding: 0.7rem 1.1rem; font-size: 0.72rem; letter-spacing: 0.12em; }
.btn--lg { padding: 1.1rem 2rem; font-size: 0.82rem; }
.btn[disabled], .btn[aria-disabled='true'] { opacity: 0.55; pointer-events: none; }

/* --- Header ------------------------------------------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 60;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(15,19,23,0.62), rgba(15,19,23,0));
  transition: opacity 0.3s var(--ease);
}
.site-header:is(.is-scrolled, .is-solid) { background: rgba(245, 246, 247, 0.94); backdrop-filter: blur(10px); border-bottom-color: var(--line); box-shadow: 0 1px 24px rgba(20, 26, 31, 0.07); }
.site-header:is(.is-scrolled, .is-solid)::before { opacity: 0; }
.site-header__inner { display: flex; align-items: center; gap: 1.5rem; min-height: var(--header-h); }

.brand { display: inline-flex; align-items: center; gap: 0.85rem; flex-shrink: 0; }
.brand__mark { display: block; width: 92px; flex-shrink: 0; }
.brand__logo { display: block; width: 100%; height: auto; }
/* the mark has a light (graphite) and a dark (white) variant; the header picks one by state */
.brand__logo--on-light { display: none; }
.site-header:is(.is-scrolled, .is-solid) .brand__logo--on-light { display: block; }
.site-header:is(.is-scrolled, .is-solid) .brand__logo--on-dark { display: none; }
.brand__text { display: flex; flex-direction: column; gap: 2px; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 1.14rem; letter-spacing: 0.005em; color: var(--ink-on-dark); text-transform: uppercase; line-height: 1; transition: color 0.3s var(--ease); }
.brand__descriptor { font-family: var(--font-display); font-weight: 500; font-size: 0.52rem; letter-spacing: 0.34em; text-transform: uppercase; color: rgba(234, 237, 239, 0.7); line-height: 1; transition: color 0.3s var(--ease); }

.site-header:is(.is-scrolled, .is-solid) .brand__name { color: var(--ink); }
.site-header:is(.is-scrolled, .is-solid) .brand__descriptor { color: var(--ink-muted); }

.nav { display: flex; align-items: center; gap: clamp(0.6rem, 1.6vw, 1.5rem); margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: clamp(0.5rem, 1.5vw, 1.4rem); }
.nav__link {
  position: relative; display: inline-block; padding: 0.4rem 0;
  font-family: var(--font-display); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.13em;
  text-transform: uppercase; color: rgba(234, 237, 239, 0.85); transition: color 0.2s var(--ease);
}
.nav__link::after { content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: currentColor; transition: right 0.3s var(--ease); }
.nav__link:hover { color: var(--white); }
.nav__link:hover::after, .nav__link.is-active::after { right: 0; }
.nav__link.is-active { color: var(--bronze); }
.site-header:is(.is-scrolled, .is-solid) .nav__link { color: var(--ink-body); }
.site-header:is(.is-scrolled, .is-solid) .nav__link:hover { color: var(--ink); }
.site-header:is(.is-scrolled, .is-solid) .nav__link.is-active { color: var(--bronze-ink); }
.nav__cta { display: none; }
.site-header__actions { display: flex; align-items: center; gap: 0.75rem; margin-left: clamp(0.5rem, 1.5vw, 1.25rem); }
.nav-toggle { display: none; }

/* --- Hero --------------------------------------------------------------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: min(100vh, 940px);                 /* fallback for older browsers */
  min-height: min(100svh, 940px);
  display: flex; align-items: flex-end;
  padding: calc(var(--header-h) + clamp(3rem, 7vw, 6rem)) 0 clamp(3rem, 6vw, 5rem);
  background: var(--graphite-deep); color: var(--ink-on-dark);
}
.hero__bg { position: absolute; inset: 0; z-index: -1; }
.hero__img { width: 100%; height: 100%; object-fit: cover; object-position: 68% 50%; }
.hero__inner { width: min(var(--shell), 100% - (var(--gutter) * 2)); margin-inline: auto; }
.hero__eyebrow {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.19em; text-transform: uppercase;
  color: var(--bronze); margin-bottom: 1.6rem;
}
.hero__title { font-size: clamp(2.35rem, 6.6vw, 5.4rem); line-height: 0.96; letter-spacing: -0.025em; color: var(--white); max-width: 16ch; }
.hero__subtitle {
  margin-top: 1.5rem; font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.15rem, 2.3vw, 1.85rem); line-height: 1.25; letter-spacing: -0.01em;
  color: var(--ink-on-dark); max-width: 30ch;
}
.hero__lead { margin-top: 1.4rem; max-width: 62ch; color: var(--ink-on-dark-muted); font-size: clamp(1rem, 1.35vw, 1.12rem); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: clamp(2rem, 4vw, 3rem); }
.hero__strip {
  display: flex; flex-wrap: wrap; gap: 0.6rem 0; margin-top: clamp(2.75rem, 5.5vw, 4.5rem);
  border-top: 1px solid var(--line-on-dark); padding-top: 1.35rem;
}
.hero__strip-item {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-on-dark-muted); padding-right: 1.6rem; margin-right: 1.6rem; position: relative;
}
.hero__strip-item + .hero__strip-item::before { content: ''; position: absolute; left: -1.6rem; top: 50%; width: 3px; height: 3px; background: var(--bronze); border-radius: 50%; transform: translateY(-50%); }

/* --- Sections ----------------------------------------------------------- */
.section { padding: var(--section-y) 0; }
.section--dark { background: var(--graphite); color: var(--ink-on-dark); }
.section--dark .section-title { color: var(--ink-on-dark); }
.section--tint { background: var(--light); }

/* --- About -------------------------------------------------------------- */
.about { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(2.5rem, 6vw, 6rem); align-items: start; }
.about__copy { display: grid; gap: 1.5rem; max-width: 66ch; }
.about__aside { display: grid; gap: 2.25rem; padding-top: 0.5rem; border-top: 1px solid var(--line); }
.spec-block { padding-top: 1.5rem; }
.spec-block__title {
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 400; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-muted); margin-bottom: 1.1rem;
}
.spec-list { display: grid; gap: 0.6rem; }
.spec-list__item { position: relative; padding-left: 1.35rem; font-size: 0.95rem; color: var(--ink); }
.spec-list__item::before { content: ''; position: absolute; left: 0; top: 0.72em; width: 8px; height: 1px; background: var(--bronze); }

/* --- Manufacturing & supply network ------------------------------------- */
.network { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(2.5rem, 5vw, 4.5rem); align-items: start; }
.network__figure { margin: 0; border: 1px solid var(--line-on-dark); background: var(--graphite-deep); }
.network__img { width: 100%; height: auto; }
.network__caption {
  display: block; padding: 0.95rem 1.15rem; border-top: 1px solid var(--line-on-dark);
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--ink-on-dark-muted);
}
.network__body { display: grid; gap: 1.4rem; }
.network__text { color: var(--ink-on-dark-muted); font-size: 1.02rem; }
.process { display: grid; gap: 0; margin-top: 1rem; border-top: 1px solid var(--line-on-dark); }
.process__step { display: grid; grid-template-columns: 3.5rem 1fr; gap: 0.5rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line-on-dark); align-items: baseline; }
.process__index { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--bronze); }
.process__body { display: grid; gap: 0.25rem; }
.process__title { font-family: var(--font-display); font-weight: 700; font-size: 0.86rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-on-dark); }
.process__text { font-size: 0.94rem; color: var(--ink-on-dark-muted); }

/* --- Products ----------------------------------------------------------- */
.products { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product {
  position: relative; padding: clamp(1.5rem, 2.4vw, 2.1rem); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  display: grid; gap: 0.85rem; align-content: start;
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.product::after { content: ''; position: absolute; left: 0; right: 100%; top: -1px; height: 2px; background: var(--bronze); transition: right 0.35s var(--ease); }
.product:hover { background: var(--white); box-shadow: 0 18px 40px -28px rgba(20, 26, 31, 0.4); }
.product:hover::after { right: 0; }
.product__icon { color: var(--ink); }
.icon { width: 40px; height: 40px; stroke: currentColor; }
.icon .accent { stroke: var(--bronze); }
.product__index { position: absolute; top: clamp(1.5rem, 2.4vw, 2.1rem); right: clamp(1.5rem, 2.4vw, 2.1rem); font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--stone); }
.product__title { font-size: 1.02rem; letter-spacing: 0.005em; text-transform: none; font-weight: 700; line-height: 1.3; margin-top: 0.35rem; }
.product__text { font-size: 0.92rem; color: var(--ink-muted); line-height: 1.6; }

/* --- Applications ------------------------------------------------------- */
.apps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.app {
  display: flex; align-items: baseline; gap: 0.9rem; padding: clamp(1.35rem, 2.1vw, 1.85rem);
  border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong);
  background: var(--white); transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.app:hover { background: var(--graphite); }
.app:hover .app__title, .app:hover .app__index { color: var(--ink-on-dark); }
.app:hover .app__index { color: var(--bronze); }
.app__index { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--stone); flex-shrink: 0; transition: color 0.3s var(--ease); }
.app__title { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; line-height: 1.35; letter-spacing: 0.01em; color: var(--ink); text-transform: none; transition: color 0.3s var(--ease); }

/* --- Legacy machinery (highlighted) ------------------------------------- */
.section--legacy { position: relative; background: var(--graphite-deep); color: var(--ink-on-dark); overflow: hidden; padding: calc(var(--section-y) * 0.85) 0; }
.section--legacy::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: linear-gradient(180deg, var(--bronze), rgba(183, 155, 122, 0.15)); }
.legacy { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.6fr); gap: 3rem; align-items: center; }
.legacy__body { display: grid; gap: 1.1rem; justify-items: start; max-width: 72ch; }
.legacy__title { font-size: clamp(1.75rem, 3.6vw, 3.05rem); color: var(--white); }
.legacy__text { color: var(--ink-on-dark-muted); font-size: clamp(1rem, 1.3vw, 1.1rem); }
.legacy__note { color: var(--bronze); font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; padding-left: 1.1rem; border-left: 2px solid rgba(183, 155, 122, 0.45); }
.legacy__body .btn { margin-top: 0.85rem; }
.legacy__mark { display: grid; place-items: center; }
.legacy__mark-svg { width: min(320px, 100%); height: auto; }
.legacy__ring { fill: none; stroke: rgba(183, 155, 122, 0.5); stroke-width: 1; }
.legacy__ring--inner { stroke: rgba(183, 155, 122, 0.28); stroke-dasharray: 3 7; }
.legacy__cross { stroke: rgba(154, 160, 166, 0.3); stroke-width: 1; }

/* --- Inquiry form ------------------------------------------------------- */
.section--inquiry { background: var(--light); }
/* full-width two-column layout: guidance on the left, form card on the right */
.inquiry { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr); gap: clamp(2rem, 4.5vw, 4.5rem); align-items: start; }
.inquiry__intro { display: grid; gap: clamp(1.75rem, 3vw, 2.5rem); align-content: start; }
.section-head--flush { margin-bottom: 0; }
.inquiry__aside { border-top: 1px solid var(--line-strong); padding-top: 1.5rem; display: grid; gap: 1rem; }
.inquiry__aside-title { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 400; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); }
.inquiry__list { display: grid; gap: 0.6rem; }
.inquiry__list-item { position: relative; padding-left: 1.35rem; font-size: 0.95rem; color: var(--ink); }
.inquiry__list-item::before { content: ''; position: absolute; left: 0; top: 0.72em; width: 8px; height: 1px; background: var(--bronze); }
.inquiry__aside-note { font-size: 0.9rem; color: var(--ink-muted); max-width: 42ch; }
.form { background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--graphite); padding: clamp(1.75rem, 3.4vw, 3.25rem); box-shadow: 0 30px 70px -60px rgba(20, 26, 31, 0.55); }
.form__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem 1.6rem; }
.field { display: grid; gap: 0.5rem; align-content: start; }
.field--full { grid-column: 1 / -1; }
.field__label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.11em; text-transform: uppercase; color: var(--ink-muted); }
.field__input {
  width: 100%; padding: 0.95rem 1.05rem; background: #FCFCFD; border: 1px solid var(--line-strong); border-radius: 3px;
  color: var(--ink); font-size: 0.98rem; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}
.field__input:hover { background: var(--white); }
.field__input::placeholder { color: #A2A8AE; }
.field__input:hover { border-color: #B9BFC4; }
.field__input:focus { outline: none; background: var(--white); border-color: var(--bronze-ink); box-shadow: 0 0 0 4px rgba(183, 155, 122, 0.18); }
.field__textarea { resize: vertical; min-height: 150px; }
.field.is-invalid .field__input { border-color: #B3453C; box-shadow: 0 0 0 3px rgba(179, 69, 60, 0.12); }
.field__error { font-size: 0.8rem; color: #9E3A32; }
.form__trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem; margin-top: 2rem; padding-top: 1.75rem; border-top: 1px solid var(--line); }
.form__consent { font-size: 0.86rem; color: var(--ink-muted); max-width: 52ch; }
.form__status { margin-top: 1rem; font-size: 0.9rem; color: var(--ink-muted); min-height: 1.2em; }
.form__status.is-error { color: #9E3A32; }

/* upload */
.upload { position: relative; }
.upload__input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.upload__drop {
  display: grid; justify-items: center; gap: 0.55rem; padding: clamp(1.75rem, 3.2vw, 2.75rem);
  border: 1px dashed var(--line-strong); background: #FAFBFB; border-radius: 3px;
  text-align: center; transition: border-color 0.25s var(--ease), background 0.25s var(--ease); cursor: pointer;
}
.upload__drop:hover, .upload__drop.is-over { border-color: var(--bronze-ink); background: #F1F2F3; }
.upload__icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: rgba(183, 155, 122, 0.14); color: var(--bronze-ink); margin-bottom: 0.25rem; }
.upload__icon .icon { width: 26px; height: 26px; }
.upload__title { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; color: var(--ink); }
.upload__hint { font-size: 0.88rem; color: var(--ink-muted); }
.upload__button { margin-top: 0.5rem; pointer-events: none; }
.upload__note { margin-top: 0.7rem; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; color: var(--ink-muted); text-transform: uppercase; }
.upload__list { display: grid; gap: 0.5rem; margin-top: 0.9rem; }
.upload__item { display: flex; align-items: center; gap: 0.75rem; padding: 0.65rem 0.85rem; border: 1px solid var(--line); background: var(--white); font-size: 0.88rem; }
.upload__name { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload__size { margin-left: auto; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-muted); flex-shrink: 0; }
.upload__remove { display: grid; place-items: center; width: 26px; height: 26px; border: 1px solid var(--line-strong); border-radius: var(--radius); color: var(--ink-muted); flex-shrink: 0; transition: color 0.2s var(--ease), border-color 0.2s var(--ease); }
.upload__remove:hover { color: #9E3A32; border-color: #9E3A32; }
.upload__remove svg { width: 12px; height: 12px; stroke: currentColor; stroke-width: 1.6; }
.upload__error { margin-top: 0.7rem; font-size: 0.84rem; color: #9E3A32; }

/* inline error notice — only when the inquiry did not reach the server */
.form-notice { margin-top: 1.25rem; padding: 1.1rem 1.25rem; border: 1px solid #E7C9C5; border-left: 3px solid #B3453C; background: #FBF1F0; }
.form-notice__title { font-size: 1.02rem; text-transform: none; letter-spacing: 0; color: #8E322B; margin-bottom: 0.35rem; }
.form-notice__text { font-size: 0.95rem; color: #7A3530; }
.form-notice__fallback { margin-top: 0.6rem; font-size: 0.92rem; }
.form-notice__fallback a { color: #8E322B; border-bottom: 1px solid currentColor; }

/* success dialog — shown after a confirmed submission */
.modal { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 1.25rem; }
.modal[hidden] { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(16, 21, 26, 0.74); animation: rwFade 0.2s var(--ease); }
.modal__dialog { position: relative; width: min(560px, 100%); max-height: calc(100vh - 2.5rem); overflow-y: auto; background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--bronze); padding: clamp(1.75rem, 3.5vw, 2.75rem); display: grid; gap: 1rem; justify-items: start; box-shadow: 0 40px 80px -40px rgba(16, 21, 26, 0.6); animation: rwRise 0.28s var(--ease); }
.modal__close { position: absolute; top: 0.9rem; right: 0.9rem; width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--line-strong); background: var(--white); color: var(--ink-muted); border-radius: var(--radius); transition: color 0.2s var(--ease), border-color 0.2s var(--ease); }
.modal__close:hover { color: var(--ink); border-color: var(--ink); }
.modal__close svg { width: 12px; height: 12px; stroke: currentColor; stroke-width: 1.6; fill: none; }
.modal__icon svg { width: 54px; height: 54px; }
.modal__ring { fill: none; stroke: var(--bronze); stroke-width: 1.4; }
.modal__check { fill: none; stroke: var(--bronze-ink); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.modal__title { font-size: clamp(1.3rem, 2.6vw, 1.8rem); }
.modal__text { color: var(--ink-body); font-size: 1.04rem; max-width: 46ch; }
.modal__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 0.5rem; }
body.modal-open { overflow: hidden; }
@keyframes rwFade { from { opacity: 0; } }
@keyframes rwRise { from { opacity: 0; transform: translateY(10px); } }

/* --- Contact ------------------------------------------------------------ */
.contact__grid { display: grid; grid-template-columns: minmax(0, 640px) minmax(0, 1fr); gap: clamp(1.5rem, 3vw, 3rem); align-items: start; }
.contact__aside { border: 1px solid var(--line); border-top: 3px solid var(--bronze); padding: clamp(1.5rem, 2.6vw, 2.25rem); display: grid; gap: 1.1rem; }
.contact__aside-title { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 400; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted); }
.contact__aside-list { display: grid; gap: 0.7rem; }
.contact__aside-list li { position: relative; padding-left: 1.35rem; font-size: 0.95rem; color: var(--ink); }
.contact__aside-list li::before { content: ''; position: absolute; left: 0; top: 0.72em; width: 8px; height: 1px; background: var(--bronze); }
.contact__aside-note { font-size: 0.86rem; color: var(--ink-muted); }
.contact__card { border: 1px solid var(--line); border-top: 3px solid var(--graphite); padding: clamp(1.75rem, 3.5vw, 3rem); display: grid; gap: 1.5rem; justify-items: start; }
.contact__brand { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.3rem, 2.2vw, 1.7rem); letter-spacing: -0.01em; color: var(--ink); text-transform: uppercase; }
.contact__list { display: grid; gap: 0; width: 100%; border-top: 1px solid var(--line); }
.contact__row { display: grid; grid-template-columns: 140px 1fr; gap: 1rem; padding: 0.9rem 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.contact__label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.11em; text-transform: uppercase; color: var(--ink-muted); }
.contact__value { font-size: 1rem; color: var(--ink); }
.contact__note { font-size: 0.92rem; color: var(--ink-muted); max-width: 58ch; }

/* --- Footer ------------------------------------------------------------- */
.site-footer { background: var(--graphite); color: var(--ink-on-dark); padding: clamp(3rem, 5.5vw, 4.5rem) 0 2.25rem; border-top: 1px solid var(--line-on-dark); }
.site-footer__inner { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.brand__mark--footer { width: 88px; }
.site-footer__tagline { margin-top: 1.25rem; color: var(--ink-on-dark); font-family: var(--font-display); font-weight: 600; font-size: 1rem; max-width: 40ch; }
.site-footer__note { margin-top: 0.65rem; color: var(--ink-on-dark-muted); font-size: 0.88rem; max-width: 52ch; }
.site-footer__meta { display: grid; gap: 1.15rem; justify-items: start; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.site-footer__links a { font-family: var(--font-display); font-size: 0.76rem; letter-spacing: 0.12em; text-transform: uppercase; }
.site-footer__copy { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--ink-on-dark-muted); }

/* --- Legal / 404 pages -------------------------------------------------- */
.page--legal .legal, .page--404 .error { padding: calc(var(--header-h) + clamp(2.5rem, 6vw, 4.5rem)) 0 var(--section-y); }
.legal__head { max-width: 70ch; margin-bottom: clamp(2rem, 4vw, 3rem); }
.legal__updated { margin-top: 1rem; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-muted); }
.legal__intro { margin-top: 1.25rem; font-size: 1.08rem; color: var(--ink); max-width: 66ch; }
.legal__body { max-width: 78ch; display: grid; gap: 2rem; }
.legal__section h2 { font-size: 1.05rem; text-transform: none; letter-spacing: 0.005em; margin-bottom: 0.6rem; }
.legal__section p { color: var(--ink-body); }
.legal__back { margin-top: 3rem; }
.error { text-align: left; }
.error__code { font-family: var(--font-display); font-weight: 800; font-size: clamp(4rem, 14vw, 9rem); line-height: 0.85; color: var(--graphite); letter-spacing: -0.04em; }
.error__title { margin-top: 1.5rem; font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
.error__text { margin-top: 1rem; font-size: 1.05rem; color: var(--ink-body); max-width: 52ch; }
.error__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.25rem; }

/* --- Scroll reveal ------------------------------------------------------ */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal--d1 { transition-delay: 0.08s; }
.reveal--d2 { transition-delay: 0.16s; }
.reveal--d3 { transition-delay: 0.24s; }

/* --- Responsive --------------------------------------------------------- */
@media (min-width: 1121px) {
  .inquiry__intro { position: sticky; top: calc(var(--header-h) + 2.5rem); }
}
@media (max-width: 1120px) {
  .products, .apps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .contact__grid { grid-template-columns: 1fr; }
  .inquiry { grid-template-columns: 1fr; gap: clamp(2rem, 4vw, 3rem); }
  .inquiry__aside { max-width: 52ch; }
  .about { grid-template-columns: 1fr; gap: 2.5rem; }
  .network { grid-template-columns: 1fr; }
  .legacy { grid-template-columns: 1fr; }
  .legacy__mark { display: none; }
}
@media (max-width: 980px) {
  :root { --header-h: 68px; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0; z-index: 55;
    display: grid; gap: 0.25rem; margin: 0; padding: 1.25rem var(--gutter) 1.75rem;
    background: var(--graphite); border-bottom: 1px solid var(--line-on-dark);
    transform: translateY(-12px); opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
    max-height: calc(100svh - var(--header-h)); overflow-y: auto;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .nav__list { display: grid; gap: 0; }
  .nav__item { border-bottom: 1px solid var(--line-on-dark); }
  .nav__link { display: block; padding: 1rem 0; font-size: 0.9rem; color: var(--ink-on-dark); }
  .site-header:is(.is-scrolled, .is-solid) .nav__link { color: var(--ink-on-dark); }
  .nav__link::after { display: none; }
  .nav__cta { display: inline-flex; margin-top: 1.25rem; justify-self: start; }
  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.3); border-radius: var(--radius); color: var(--ink-on-dark);
    transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
  }
  .site-header:is(.is-scrolled, .is-solid) .nav-toggle { border-color: var(--line-strong); color: var(--ink); }
  .nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
  .nav-toggle__bars span { display: block; height: 1.5px; background: currentColor; transition: transform 0.25s var(--ease), opacity 0.2s var(--ease); }
  .nav-toggle[aria-expanded='true'] .nav-toggle__bars span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .nav-toggle[aria-expanded='true'] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded='true'] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
  .header-cta { display: none; }
  .brand__mark { width: 76px; }
  .brand__mark--footer { width: 80px; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 1.75rem; }
}
@media (max-width: 760px) {
  .products, .apps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form__grid { grid-template-columns: 1fr; gap: 1.15rem; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 4.5rem); padding-bottom: 3.25rem; }
  .hero__title { max-width: none; }
  .hero__img { object-position: 72% 50%; }
  .contact__grid { grid-template-columns: 1fr; }
  .contact__row { grid-template-columns: 1fr; gap: 0.2rem; }
  .form__footer { flex-direction: column; align-items: stretch; }
  .form__submit { width: 100%; }
  .upload__drop { padding: 1.35rem 1rem; }
}
@media (max-width: 520px) {
  .products, .apps { grid-template-columns: 1fr; }
  .modal__actions .btn { width: 100%; }
  .modal { padding: 0.75rem; }
  .hero__actions .btn { width: 100%; }
  .process__step { grid-template-columns: 2.5rem 1fr; }
}
/* --- contact: optional entries (QR code image) --- */
.contact__qr { margin: 0; display: grid; gap: 0.6rem; justify-items: start; }
.contact__qr-img { width: 148px; height: auto; border: 1px solid var(--line); background: var(--white); padding: 8px; }
.contact__qr-caption { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-muted); }

@media (prefers-reduced-motion: reduce) {
  .modal__backdrop, .modal__dialog { animation: none; }
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}
@media print {
  .site-header, .nav, .hero__bg, .site-footer { display: none; }
  body { color: #000; }
}