/* ============================================================
   PTGBI — Industrial Professional
   Palette: deep navy + slate + single amber accent
   Fonts: IBM Plex Sans / IBM Plex Mono (enterprise engineering)
   ============================================================ */

:root {
  /* Color tokens */
  --c-navy-900: #0a1424;
  --c-navy-800: #0b2a4a;
  --c-navy-700: #14375c;
  --c-navy-600: #1d4b78;
  --c-steel-700: #2a4a63;
  --c-steel-500: #4b6577;
  --c-steel-400: #6b8094;

  --c-ink: #0e1722;          /* off-black body text */
  --c-body: #475569;          /* secondary text */
  --c-mute: #8696a7;          /* tertiary / labels */
  --c-line: #e3e8ee;          /* hairlines */

  --c-bg: #f7f8fa;            /* page bg */
  --c-surface: #ffffff;
  --c-surface-2: #eef2f6;     /* alt section tint */

  --c-accent: #f5a623;        /* amber — single accent */
  --c-accent-600: #d8890f;
  --c-accent-soft: #fff4dd;

  /* Radii lock: sharp top for cards (radius 0), pill for interactive CTAs */
  --radius-card: 0px;
  --radius-input: 6px;
  --radius-pill: 999px;

  /* Spacing scale */
  --s-1: 0.25rem; --s-2: 0.5rem; --s-3: 0.75rem; --s-4: 1rem;
  --s-5: 1.5rem; --s-6: 2rem; --s-8: 3rem; --s-10: 4rem; --s-12: 6rem;

  /* Type */
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --shadow-card: 0 1px 0 rgba(11, 42, 74, 0.04), 0 12px 32px -16px rgba(11, 42, 74, 0.18);
  --shadow-nav: 0 1px 0 rgba(11, 42, 74, 0.06), 0 8px 24px -16px rgba(11, 42, 74, 0.25);

  --container: 1200px;
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
.mono { font-family: var(--font-mono); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-mute);
}
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
section { position: relative; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 248, 250, 0.86);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-nav); background: rgba(255,255,255,0.92); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 6px;
  background: linear-gradient(160deg, var(--c-navy-800), var(--c-navy-700));
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 15px; letter-spacing: 0.02em;
  font-family: var(--font-mono);
}
.brand-name { font-weight: 600; font-size: 15px; letter-spacing: 0.04em; color: var(--c-navy-900); }
.brand-name small { display: block; font-weight: 400; font-size: 11px; color: var(--c-mute); letter-spacing: 0.08em; }
.nav-menu { display: flex; align-items: center; gap: 28px; }
.nav-menu a { font-size: 14px; color: var(--c-ink); font-weight: 500; position: relative; padding: 6px 0; transition: color 0.2s ease; }
.nav-menu a::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--c-accent); transition: width 0.25s ease; }
.nav-menu a:hover::after { width: 100%; }
.nav-menu a:hover { color: var(--c-navy-800); }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { display: flex; align-items: center; gap: 5px; }
.nav-dropdown-toggle svg { transition: transform 0.2s ease; }
.nav-dropdown:hover .nav-dropdown-toggle svg { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: -12px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 8px;
  box-shadow: 0 16px 32px -14px rgba(11,42,74,0.18);
  min-width: 220px;
  padding: 8px;
  display: none;
  flex-direction: column;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.nav-dropdown:hover .nav-dropdown-menu { display: flex; opacity: 1; transform: translateY(0); }
.nav-dropdown-menu a {
  padding: 10px 14px !important;
  border-radius: 6px;
  font-size: 13.5px !important;
}
.nav-dropdown-menu a:hover { background: var(--c-surface-2); }
.nav-dropdown-menu a::after { display: none; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  display: inline-flex; align-items: center; gap: 0;
  background: var(--c-surface); border: 1px solid var(--c-line);
  border-radius: var(--radius-pill); padding: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em;
  overflow: hidden; line-height: 1; user-select: none;
}
.lang-toggle .lang-opt {
  padding: 7px 11px; color: var(--c-mute);
  transition: background 0.2s, color 0.2s; cursor: pointer;
}
.lang-toggle .lang-opt.active { background: var(--c-navy-800); color: #fff; }
.lang-toggle .lang-opt:hover:not(.active) { color: var(--c-navy-800); background: var(--c-surface-2); }
.lang-toggle .lang-sep { color: var(--c-mute); padding: 7px 0; pointer-events: none; }
.iso-mini { display: flex; gap: 6px; }
.iso-mini .pill {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.06em;
  border: 1px solid var(--c-line); color: var(--c-steel-500);
  padding: 4px 8px; border-radius: var(--radius-pill); background: #fff;
}
.nav-toggle { display: none; background: none; border: none; width: 40px; height: 40px; padding: 8px; cursor: pointer; position: relative; }
.ham-bar { display: block; width: 24px; height: 2px; background: var(--c-ink); border-radius: 2px; position: absolute; left: 8px; transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), opacity 0.2s ease; }
.ham-bar:nth-child(1) { top: 13px; }
.ham-bar:nth-child(2) { top: 19px; }
.ham-bar:nth-child(3) { top: 25px; }
.nav-toggle.active .ham-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active .ham-bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.active .ham-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; letter-spacing: 0.01em;
  padding: 11px 20px; border-radius: var(--radius-pill);
  border: 1px solid transparent; transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--c-navy-800); color: #fff; box-shadow: 0 8px 20px -10px rgba(11,42,74,0.6); }
.btn-primary:hover { background: var(--c-navy-700); }
.btn-accent { background: var(--c-accent); color: #2a1a02; box-shadow: 0 8px 20px -10px rgba(245,166,35,0.7); }
.btn-accent:hover { background: var(--c-accent-600); }
.btn-ghost { background: transparent; color: var(--c-ink); border-color: var(--c-line); }
.btn-ghost:hover { border-color: var(--c-navy-700); color: var(--c-navy-800); }
.btn-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.28); }
.btn-light:hover { background: rgba(255,255,255,0.08); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative; overflow: hidden; color: #fff;
  min-height: clamp(560px, 84vh, 720px); display: flex; align-items: center;
}
.hero-slideshow { position: absolute; inset: 0; z-index: 0; }
.hero-slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(10,20,36,0.75) 0%, rgba(11,42,74,0.82) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 64px 0; }
.hero-copy { max-width: 680px; }
.hero h1 { font-size: clamp(40px, 5.2vw, 64px); line-height: 1.03; letter-spacing: -0.02em; font-weight: 600; margin: 18px 0 22px; color: #fff; }
.hero h1 em { font-style: normal; color: var(--c-accent); }
.hero p.lead { font-size: 18px; line-height: 1.55; color: #c8d4e2; max-width: 52ch; margin: 0 0 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-slide-captions { max-width: 680px; margin-top: 28px; position: relative; min-height: 60px; }
.hero-caption {
  position: absolute; top: 0; left: 0; opacity: 0;
  font-size: 15px; color: #a9bccc; line-height: 1.6; font-style: italic;
  transition: opacity 0.5s ease;
}
.hero-caption.active { opacity: 1; position: relative; }
.hero-dots { display: flex; gap: 10px; margin-top: 28px; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid rgba(255,255,255,0.4); background: transparent; cursor: pointer; padding: 0; transition: background 0.2s, border-color 0.2s; }
.hero-dot.active { background: var(--c-accent); border-color: var(--c-accent); }
.hero-dot:hover { border-color: #fff; }


/* Trust logos strip */
.trust { background: var(--c-surface); border-bottom: 1px solid var(--c-line); }
.trust-inner { display: flex; align-items: center; gap: 40px; padding: 26px 0; flex-wrap: wrap; }
.trust .lead-txt { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--c-mute); white-space: nowrap; }
.trust .logos { display: flex; gap: 44px; align-items: center; flex-wrap: wrap; opacity: 0.78; }
.trust .logos .lgo { font-weight: 600; font-size: 16px; color: var(--c-ink); letter-spacing: 0.02em; display: flex; align-items: center; gap: 8px; }
.trust .logos .dot { width: 8px; height: 8px; border-radius: 2px; background: var(--c-accent); }

/* ============================================================
   Section primitives
   ============================================================ */
.section { padding: clamp(72px, 10vw, 116px) 0; }
.section-alt { background: var(--c-surface-2); }
.section-dark { background: var(--c-navy-900); color: #c8d4e2; }
.section-dark h2 { color: #fff; }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 600; margin: 14px 0 16px; color: var(--c-navy-900); }
.section-head p { font-size: 17px; color: var(--c-body); max-width: 60ch; margin: 0; }

/* ============================================================
   About
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: start; }
.about-body p { font-size: 16.5px; color: var(--c-body); margin: 0 0 18px; max-width: 60ch; }
.about-body p:first-child { font-size: 18px; color: var(--c-ink); }
.about-meta { display: flex; flex-direction: column; gap: 0; }
.about-meta-img { width: 100%; height: auto; border-radius: 8px; object-fit: cover; margin-bottom: 20px; }
.about-meta .row { display: flex; gap: 16px; padding: 18px 0; border-top: 1px solid var(--c-line); align-items: baseline; }
.about-meta .row:last-child { border-bottom: 1px solid var(--c-line); }
.about-meta .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--c-mute); width: 130px; flex-shrink: 0; }
.about-meta .v { font-size: 15px; color: var(--c-ink); font-weight: 500; }

/* ============================================================
   Business units — asymmetric two tiles
   ============================================================ */
.units { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.unit-card {
  position: relative; overflow: hidden; border-radius: 10px;
  min-height: 360px; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 32px; color: #fff; border: 1px solid rgba(11,42,74,0.08);
  isolation: isolate;
}
.unit-card .bg { position: absolute; inset: 0; z-index: -2; background-size: cover; background-position: center; }
.unit-card::after { content:""; position:absolute; inset:0; z-index:-1; background: linear-gradient(180deg, rgba(8,18,33,0.1) 0%, rgba(8,18,33,0.82) 75%); }
.unit-card .tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--c-accent); }
.unit-card h3 { font-size: 26px; font-weight: 600; margin: 10px 0 10px; letter-spacing: -0.01em; }
.unit-card p { font-size: 14.5px; color: rgba(255,255,255,0.82); margin: 0 0 18px; max-width: 42ch; }
.unit-card .link { font-size: 13px; font-weight: 600; color: #fff; display: inline-flex; gap: 6px; align-items: center; }
.unit-card .link svg { width: 16px; height: 16px; }

/* ============================================================
   EPC tabbed services
   ============================================================ */
.epc-tabs { border: 1px solid var(--c-line); border-radius: 12px; background: var(--c-surface); overflow: hidden; }
.epc-tab-nav { display: flex; gap: 0; border-bottom: 1px solid var(--c-line); overflow-x: auto; -webkit-overflow-scrolling: touch; }
.epc-tab-nav::-webkit-scrollbar { display: none; }
.epc-tab-btn {
  flex-shrink: 0; font-size: 13px; font-weight: 600; color: var(--c-mute);
  padding: 14px 20px; background: transparent; border: none; border-bottom: 2px solid transparent;
  cursor: pointer; transition: color 0.2s, border-color 0.2s; font-family: var(--font-sans);
}
.epc-tab-btn:hover { color: var(--c-navy-800); }
.epc-tab-btn.active { color: var(--c-navy-900); border-bottom-color: var(--c-accent); }
.epc-tab-panel { display: none; padding: 36px; }
.epc-tab-panel.active { display: block; }
.epc-tab-grid { display: grid; grid-template-columns: 360px 1fr; gap: 40px; align-items: start; }
.epc-tab-img img { width: 100%; border-radius: 10px; display: block; }
.epc-tab-content h3 { font-size: 22px; font-weight: 600; margin: 0 0 16px; color: var(--c-navy-900); letter-spacing: -0.01em; }
.epc-tab-content ul { list-style: disc; padding-left: 18px; margin: 0 0 20px; }
.epc-tab-content ul li { font-size: 14.5px; color: var(--c-body); margin-bottom: 8px; line-height: 1.6; }
.epc-note { font-size: 13.5px; color: var(--c-accent-600); background: var(--c-accent-soft); padding: 12px 16px; border-radius: 8px; margin: 16px 0 !important; }
.chem-grid-compact { display: grid; grid-template-columns: 1fr; gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); border-radius: 10px; overflow: hidden; margin-bottom: 20px; }
.chem-grid-compact .chem-prod { background: var(--c-surface); padding: 14px 16px; }
.chem-grid-compact .chem-prod .code { font-family: var(--font-mono); font-size: 11px; color: var(--c-accent-600); letter-spacing: 0.06em; display: block; }
.chem-grid-compact .chem-prod strong { font-size: 14px; font-weight: 600; color: var(--c-navy-800); display: block; margin: 2px 0; }
.chem-grid-compact .chem-prod span { font-size: 13px; color: var(--c-body); display: block; }
.chem-prod-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }
.chem-intro { margin-bottom: 24px; }
.chem-intro p { font-size: 14.5px; color: var(--c-body); line-height: 1.7; margin: 0 0 12px; }
.chem-prod-card { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: 10px; overflow: hidden; display: flex; flex-direction: column; }
.chem-prod-card img { width: 100%; height: 200px; object-fit: contain; padding: 16px; background: #f9fafc; }
.chem-prod-card .chem-prod-info { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.chem-prod-card .chem-prod-info .code { font-family: var(--font-mono); font-size: 11px; color: var(--c-accent-600); letter-spacing: 0.06em; }
.chem-prod-card .chem-prod-info strong { font-size: 15px; font-weight: 600; color: var(--c-navy-800); }
.chem-prod-card .chem-prod-info span:last-child { font-size: 13px; color: var(--c-body); line-height: 1.5; }
.chem-readmore { font-size: 12px; font-weight: 600; color: var(--c-accent-600); display: inline-flex; align-items: center; gap: 4px; margin-top: auto; padding-top: 6px; }
.chem-readmore:hover { color: var(--c-accent); }

/* ============================================================
   Equipment
   ============================================================ */
.equip-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.equip-visual .frame { border-radius: 10px; overflow: hidden; aspect-ratio: 1/1; border: 1px solid var(--c-line); background: var(--c-surface-2); }
.equip-visual .frame img { width: 100%; height: 100%; object-fit: contain; padding: 24px; background: #fff; }
.equip-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); border-radius: 10px; overflow: hidden; margin-top: 20px; }
.equip-specs .spec { background: var(--c-surface); padding: 16px 18px; }
.equip-specs .spec .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c-mute); display: block; }
.equip-specs .spec .v { font-size: 14px; font-weight: 600; color: var(--c-navy-800); display: block; margin-top: 4px; }
@media (max-width: 880px) { .equip-grid { grid-template-columns: 1fr; gap: 32px; } }

/* ============================================================
   Why us — stacked panels (Value, Quality People, Ethics)
   ============================================================ */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.why-card { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: 10px; padding: 32px; }
.why-card .k { font-family: var(--font-mono); font-size: 12px; color: var(--c-accent-600); letter-spacing: 0.14em; text-transform: uppercase; display: block; margin-bottom: 14px; }
.why-card h4 { font-size: 20px; margin: 0 0 12px; font-weight: 600; color: var(--c-navy-900); letter-spacing: -0.01em; }
.why-card p { margin: 0; font-size: 14px; color: var(--c-body); line-height: 1.65; }
@media (max-width: 880px) { .why-grid { grid-template-columns: 1fr; gap: 16px; } }

/* ============================================================
   ISO band
   ============================================================ */
.iso-band { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.iso-band .copy h2 { color: #fff; font-size: clamp(28px, 3vw, 38px); font-weight: 600; letter-spacing: -0.02em; margin: 14px 0 12px; }
.iso-band .copy p { color: #a9bccc; max-width: 56ch; margin: 0; font-size: 16px; }
.iso-cards { display: flex; gap: 14px; }
.iso-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px; padding: 22px 24px; min-width: 168px; }
.iso-card .std { font-family: var(--font-mono); font-size: 14px; color: var(--c-accent); letter-spacing: 0.04em; }
.iso-card .nm { font-size: 13px; color: #c8d4e2; margin-top: 6px; line-height: 1.4; }

/* ============================================================
   Case study
   ============================================================ */
.case { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.case-media { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.case-media .frame { border-radius: 8px; overflow: hidden; aspect-ratio: 1/1; border: 1px solid var(--c-line); background: var(--c-surface-2); position: relative; }
.case-media .frame .cap { position: absolute; inset: auto 0 0 0; padding: 8px 10px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: #fff; background: linear-gradient(0deg, rgba(8,18,33,0.7), transparent); }
.case-media .frame img { width: 100%; height: 100%; object-fit: cover; }
.case-media .frame.spot { grid-column: 1 / -1; aspect-ratio: auto; }
.case-body .tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--c-accent-600); }
.case-body h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 600; letter-spacing: -0.02em; margin: 12px 0 16px; color: var(--c-navy-900); }
.case-body p { font-size: 16px; color: var(--c-body); margin: 0 0 20px; max-width: 52ch; }
.case-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--c-line); }
.case-meta .m .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c-mute); }
.case-meta .m .v { font-size: 15px; font-weight: 600; color: var(--c-navy-900); margin-top: 4px; }
.case-gallery { display: flex; flex-wrap: wrap; justify-content: center; gap: 32px; margin-top: 24px; }
.case-gallery .frame { border-radius: 8px; overflow: hidden; border: 1px solid var(--c-line); background: var(--c-surface-2); display: flex; align-items: center; justify-content: center; }
.case-gallery .frame img { max-width: 120px; height: auto; display: block; }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 56px; align-items: start; }
.offices { display: flex; flex-direction: column; gap: 0; }
.office { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 24px 0; border-top: 1px solid var(--c-line); }
.office:last-child { border-bottom: 1px solid var(--c-line); }
.office .ico { width: 44px; height: 44px; border-radius: 8px; background: var(--c-navy-900); color: var(--c-accent); display: grid; place-items: center; }
.office .ico svg { width: 20px; height: 20px; }
.office .role { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--c-accent-600); }
.office h4 { font-size: 16px; margin: 6px 0 6px; font-weight: 600; color: var(--c-navy-900); }
.office p { margin: 0; font-size: 14px; color: var(--c-body); line-height: 1.55; }
.office .ph { font-family: var(--font-mono); font-size: 13px; color: var(--c-ink); margin-top: 6px; display: inline-block; }

.form-card { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: 12px; padding: 32px; box-shadow: var(--shadow-card); }
.form-card h3 { font-size: 22px; margin: 0 0 6px; font-weight: 600; color: var(--c-navy-900); }
.form-card .sub { font-size: 14px; color: var(--c-body); margin: 0 0 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 12px; font-weight: 600; color: var(--c-ink); margin-bottom: 6px; letter-spacing: 0.02em; }
.field label .req { color: var(--c-accent-600); }
.field input, .field textarea, .field select {
  width: 100%; font: inherit; font-size: 15px; color: var(--c-ink);
  background: #fbfcfe; border: 1px solid var(--c-line); border-radius: var(--radius-input);
  padding: 11px 13px; transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea { min-height: 110px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--c-mute); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--c-navy-600); box-shadow: 0 0 0 3px rgba(29,75,120,0.14);
}
.form-actions { display: flex; justify-content: flex-end; margin-top: 8px; }

/* ============================================================
   Footer
   ============================================================ */
.footer { background: var(--c-navy-900); color: #9fb3c8; padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer .brand-name { color: #fff; }
.footer .brand-name small { color: #6b8094; }
.footer h5 { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: #c8d4e2; margin: 0 0 16px; font-family: var(--font-mono); }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: #9fb3c8; transition: color 0.2s; }
.footer ul li a:hover { color: var(--c-accent); }
.footer .about-foot { font-size: 14px; line-height: 1.6; max-width: 36ch; margin: 18px 0 0; }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: #6b8094; }

/* ============================================================
   Reveal animation
   ============================================================ */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1 !important; transform: none !important; transition: none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
}
@media (max-width: 880px) {
  .epc-tab-grid { grid-template-columns: 1fr; gap: 24px; }
  .epc-tab-img { max-width: 400px; }
  .epc-tab-panel { padding: 24px; }

  .site-header { backdrop-filter: none; background: rgba(247, 248, 250, 1); }
  .nav-menu { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav .btn-primary { display: none; }
  .nav-menu.open {
    display: flex; position: fixed; top: 68px; left: 0; right: 0; bottom: 0; z-index: 99;
    background: var(--c-surface); flex-direction: column; align-items: stretch;
    padding: 20px 24px 40px; gap: 0; box-shadow: var(--shadow-nav); overflow-y: auto;
  }
  .nav-menu.open > a,
  .nav-menu.open > .nav-dropdown > .nav-dropdown-toggle {
    display: block; width: 100%; padding: 16px 0; border-bottom: 1px solid var(--c-line);
    font-size: 16px; font-weight: 500;
  }
  .nav-dropdown { width: 100%; }
  .nav-dropdown-toggle svg { display: none; }
  .nav-dropdown-menu {
    position: static; opacity: 1; transform: none;
    display: flex; flex-direction: column; gap: 0;
    border: none; box-shadow: none; padding: 0 0 0 20px; margin: 0;
    min-width: auto; background: transparent;
  }
  .nav-dropdown-menu a {
    display: block; width: 100%; padding: 12px 0; border-bottom: 1px solid var(--c-line);
    font-size: 14px !important; color: var(--c-body) !important;
  }
  .nav-dropdown-menu a:hover { background: transparent; color: var(--c-navy-800) !important; }
  .mobile-cta { display: none; }
  .nav-menu.open .mobile-cta {
    display: inline-flex; margin-top: 20px; align-self: stretch;
    justify-content: center; padding: 14px 20px; font-size: 15px;
  }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; min-height: 0; padding-top: 48px; padding-bottom: 56px; }
  .hero-visual .badge-iso { left: 0; right: 0; bottom: 0; position: relative; margin-top: -30px; width: fit-content; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .units { grid-template-columns: 1fr; }
  .unit-card .bg { min-height: 200px; }
  .case { grid-template-columns: 1fr; gap: 36px; }
  .iso-band { grid-template-columns: 1fr; }
  .iso-cards { flex-wrap: wrap; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  @media (max-width: 880px) { .why-grid { grid-template-columns: 1fr; gap: 16px; } }
  .chem-cats { grid-template-columns: 1fr; }
  .case-gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 36px; }
  .case-meta { grid-template-columns: 1fr; gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .section { padding: 64px 0; }
}