/* ============================================================
   SPIRAL TUBES — Design System
   Fonts: Fraunces (display), JetBrains Mono (labels), Inter (body)
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --parchment: #f6f4ef;
  --warm:      #efece4;
  --ink:       #14181d;
  --ink-soft:  #4a5057;
  --ink-mute:  #8b8f95;
  --seam:      #d9d6ce;
  --steel:     #1f3a5f;
  --rust:      #b25638;
  --gold:      #c9a14a;
  --white:     #ffffff;
  --header-h:  144px;
  --max-w:     1280px;
  --r:         12px;
  --r-lg:      20px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { display: block; max-width: 100%; }
button { font-family: inherit; }
a { color: inherit; text-decoration: none; }

/* --- Base --- */
body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--parchment);
  background-image: radial-gradient(circle, var(--seam) 0.8px, transparent 0.8px);
  background-size: 22px 22px;
  background-attachment: fixed;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, serif;
  color: var(--ink);
  line-height: 1.18;
  font-weight: 300;
}
h4, h5, h6 { color: var(--ink); font-weight: 600; }
.mono { font-family: 'JetBrains Mono', monospace; }

/* --- Container --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 200;
}

/* Top bar */
.topbar {
  background: var(--ink);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 11px;
  color: rgba(255,255,255,.55);
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.topbar a, .topbar button {
  color: #fff;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 11px;
  font-family: inherit;
  transition: color .15s;
  display: flex;
  align-items: center;
  gap: 5px;
}
.topbar a:hover, .topbar button:hover { color: #fff; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 20px; }
.topbar-sep { color: rgba(255,255,255,.5); margin: 0 4px; }

/* Nav row */
.nav-row {
  background: var(--white);
  border-bottom: 1px solid var(--seam);
  height: 68px;
  display: flex;
  align-items: center;
  transition: box-shadow .3s;
}
.nav-row.scrolled { box-shadow: 0 4px 20px rgba(20,24,29,.14); }
.nav-row .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }

.nav-brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.nav-logo { height: 50px; width: auto; border-radius: 4px; object-fit: contain; mix-blend-mode: multiply; }
.brand-name { font-size: 14px; font-weight: 700; color: var(--ink); line-height: 1.2; }
.brand-sub  { font-size: 11px; color: var(--ink-mute); line-height: 1.2; }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-link {
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: background .15s, color .15s;
}
.nav-link:hover { background: rgba(20,24,29,.06); color: var(--ink); }
.nav-link.active { background: rgba(20,24,29,.09); color: var(--ink); }

.nav-end { display: flex; align-items: center; gap: 10px; }
.nav-badges { display: flex; align-items: center; gap: 6px; padding-left: 12px; border-left: 1px solid var(--seam); }
.nav-badge { width: 64px; height: 64px; object-fit: contain; mix-blend-mode: multiply; }

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--ink);
  line-height: 0;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  background: var(--parchment);
  border-bottom: 1px solid var(--seam);
  padding: 10px 16px 14px;
}
.mobile-nav.open { display: block; }
.mobile-nav .nav-link { display: block; padding: 9px 14px; border-radius: 8px; margin-bottom: 2px; }
.mobile-contact { border-top: 1px solid var(--seam); margin-top: 10px; padding-top: 10px; }
.mobile-contact a { display: flex; align-items: center; gap: 8px; padding: 6px 14px; font-size: 12px; color: var(--ink-soft); }

/* Marquee */
.marquee-bar {
  background: var(--parchment);
  border-bottom: 1px solid var(--seam);
  height: 30px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.marquee-track {
  white-space: nowrap;
  animation: marquee 45s linear infinite;
  font-family: 'Fraunces', Georgia, serif;
  font-style: italic;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: .02em;
}
@keyframes marquee {
  from { transform: translateX(100vw); }
  to   { transform: translateX(-100%); }
}

/* ============================================================
   PAGE LAYOUT
   ============================================================ */
.page-main { padding-top: var(--header-h); }

/* Page hero (inner pages) */
.page-hero {
  background: var(--parchment);
  border-bottom: 1px solid var(--seam);
  padding: 60px 0;
}
.page-hero-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
.page-hero h1 { font-size: clamp(30px, 5vw, 48px); margin-bottom: 12px; }
.page-hero p { font-size: 14px; color: var(--ink-soft); max-width: 560px; line-height: 1.75; }

/* Section spacing */
.section    { padding: 72px 0; }
.section-sm { padding: 48px 0; }

/* Section header (editorial) */
.sec-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-mute);
  margin-bottom: 8px;
  display: block;
}
.sec-label.ruled {
  border-top: 1px solid var(--seam);
  padding-top: 12px;
}
.sec-heading { font-size: clamp(22px, 3.5vw, 34px); }
.sec-sub { font-size: 14px; color: var(--ink-soft); margin-top: 8px; max-width: 520px; }

.text-center { text-align: center; }
.text-center .sec-sub { margin-left: auto; margin-right: auto; }
.text-center .sec-label.ruled { border-top: none; border-bottom: 1px solid var(--seam); padding-top: 0; padding-bottom: 10px; }

/* ============================================================
   HOME HERO
   ============================================================ */
.home-hero {
  display: flex;
  min-height: 590px;
}
.hero-panel {
  background: var(--parchment);
  width: 50%;
  display: flex;
  align-items: center;
  padding: 56px 56px 56px 60px;
  border-right: 1px solid var(--seam);
}
.hero-inner { max-width: 440px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--seam);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  color: var(--ink-mute);
  padding: 5px 11px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.hero-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--steel);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }

.hero-title {
  font-size: clamp(30px, 3.8vw, 50px);
  line-height: 1.15;
  margin-bottom: 18px;
}
.hero-title em { font-style: italic; color: var(--ink-soft); }
.hero-desc { font-size: 14px; color: var(--ink-soft); line-height: 1.8; margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.hero-logos { display: flex; align-items: center; gap: 10px; }
.hero-logo { width: 90px; height: 90px; object-fit: contain; mix-blend-mode: multiply; }

.hero-carousel {
  position: relative;
  width: 50%;
  overflow: hidden;
  background: var(--ink);
}
.carousel-slide {
  position: absolute;
  inset: 0;
  transition: opacity 1.1s ease;
}
.carousel-slide img { width: 100%; height: 100%; object-fit: cover; }
.carousel-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}
.carousel-dot {
  height: 5px;
  width: 5px;
  border-radius: 3px;
  background: rgba(255,255,255,.45);
  border: none;
  cursor: pointer;
  transition: all .3s;
}
.carousel-dot.active { background: #fff; width: 20px; }
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(20,24,29,.28);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: background .15s;
}
.carousel-btn:hover { background: rgba(20,24,29,.55); }
.carousel-prev { left: 10px; }
.carousel-next { right: 10px; }

/* ============================================================
   STATS STRIP
   ============================================================ */
.stats-strip {
  background: var(--ink);
  padding: 18px 0;
}
.stats-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-item { display: flex; align-items: center; gap: 12px; }
.stat-num {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 28px;
  font-weight: 300;
  color: #fff;
  line-height: 1;
}
.stat-info .stat-label { font-size: 12px; font-weight: 600; color: #fff; }
.stat-info .stat-sub   { font-size: 11px; color: rgba(255,255,255,.75); margin-top: 1px; }

/* ============================================================
   USP GRID
   ============================================================ */
.usp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.usp-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  padding: 22px;
  transition: box-shadow .2s;
}
.usp-card:hover { box-shadow: 0 4px 20px rgba(20,24,29,.08); }
.usp-icon {
  width: 40px; height: 40px;
  background: var(--parchment);
  border: 1px solid var(--seam);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  margin-bottom: 14px;
  color: var(--ink-soft);
}
.usp-title { font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 6px; font-family: 'Inter', sans-serif; }
.usp-desc  { font-size: 12px; color: var(--ink-mute); line-height: 1.65; }

/* ============================================================
   PRODUCT TABS (home + portfolio)
   ============================================================ */
.tab-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 26px; }
.tab-pill {
  padding: 7px 17px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--seam);
  background: var(--white);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.tab-pill:hover:not(.active) { border-color: var(--ink-mute); color: var(--ink); }
.tab-pill.active { background: var(--ink); color: #fff; border-color: var(--ink); }

.product-panel { display: none; }
.product-panel.active { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.product-img-cell {
  position: relative;
  aspect-ratio: 16/9;
  border-radius: 10px;
  overflow: hidden;
  background: var(--parchment);
}
.product-img-cell img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-img-cell:hover img { transform: scale(1.05); }

/* ============================================================
   TESTIMONIALS / PROJECTS EXECUTED
   ============================================================ */
.testi-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 20px; }
.testi-tab {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--seam);
  background: var(--white);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
}
.testi-tab.active { background: var(--ink); color: #fff; border-color: var(--ink); }

.testi-panel { display: none; }
.testi-panel.active { display: block; }

.testi-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  overflow: hidden;
  display: flex;
}
.testi-img { width: 280px; flex-shrink: 0; }
.testi-img img { width: 100%; height: 100%; object-fit: cover; }
.testi-body { flex: 1; padding: 28px 32px; }
.testi-body h3 { font-size: 18px; font-weight: 400; margin-bottom: 18px; }
.testi-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 7px 14px; list-style: none; }
.testi-list li {
  font-size: 13px;
  color: var(--ink-soft);
  display: flex;
  align-items: flex-start;
  gap: 7px;
  line-height: 1.45;
}
.testi-list li::before { content: '·'; color: var(--ink-mute); flex-shrink: 0; }

.testi-nav { display: flex; justify-content: center; gap: 10px; margin-top: 16px; }
.testi-nav-btn {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--seam);
  background: var(--white);
  color: var(--ink-soft);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: all .15s;
}
.testi-nav-btn:hover { background: var(--parchment); border-color: var(--ink-mute); }

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 56px; }
.about-stat-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  padding: 20px;
  text-align: center;
}
.about-stat-num   { font-family: 'Fraunces', serif; font-size: 36px; font-weight: 300; color: var(--steel); line-height: 1; margin-bottom: 6px; }
.about-stat-label { font-size: 13px; font-weight: 600; color: var(--ink); }
.about-stat-sub   { font-size: 11px; color: var(--ink-mute); margin-top: 2px; }

.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: start; margin-bottom: 56px; }
.about-copy h2 { font-size: 32px; font-weight: 300; margin-bottom: 22px; }
.about-copy p  { font-size: 13px; line-height: 1.85; margin-bottom: 16px; }
.about-photo { border-radius: var(--r-lg); overflow: hidden; box-shadow: 0 8px 40px rgba(20,24,29,.12); position: sticky; top: calc(var(--header-h) + 20px); }
.about-photo img { width: 100%; height: auto; }

.profile-table { width: 100%; border-collapse: collapse; font-size: 13px; background: var(--white); border: 1px solid var(--seam); border-radius: var(--r); overflow: hidden; }
.profile-table td { padding: 14px 20px; border-bottom: 1px solid var(--seam); vertical-align: top; }
.profile-table tr:last-child td { border-bottom: none; }
.profile-table td:first-child { font-weight: 600; color: var(--ink); width: 210px; border-right: 1px solid var(--seam); background: var(--parchment); white-space: nowrap; }

/* ============================================================
   SERVICE PAGE
   ============================================================ */
.service-card-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 52px; }
.service-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .2s, transform .2s;
  text-align: center;
  padding: 0;
}
.service-card:hover { box-shadow: 0 6px 20px rgba(20,24,29,.1); transform: translateY(-2px); }
.service-card-img { aspect-ratio: 16/9; overflow: hidden; }
.service-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.service-card:hover .service-card-img img { transform: scale(1.08); }
.service-card-label { padding: 10px 8px; font-size: 11.5px; font-weight: 600; color: var(--ink-soft); }

.product-detail {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 18px;
}
.product-detail-head { background: var(--ink); padding: 14px 22px; }
.product-detail-head h3 { font-family: 'Fraunces', serif; font-size: 16px; font-weight: 300; color: #fff; }
.product-detail-body { display: flex; }
.product-detail-body.rev { flex-direction: row-reverse; }
.detail-img { width: 42%; flex-shrink: 0; background: var(--parchment); }
.detail-img img { width: 100%; height: 100%; min-height: 240px; object-fit: cover; }
.detail-content { flex: 1; padding: 22px 26px; }
.detail-content p { font-size: 13px; line-height: 1.75; margin-bottom: 16px; }
.detail-sub-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-mute);
  margin-bottom: 8px;
  margin-top: 14px;
  display: block;
}
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 5px 10px; margin-bottom: 4px; }
.feat-item { display: flex; align-items: flex-start; gap: 7px; font-size: 12px; color: var(--ink-soft); }
.feat-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--steel); flex-shrink: 0; margin-top: 5px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.spec-table th { text-align: left; padding: 7px 11px; background: var(--parchment); border: 1px solid var(--seam); font-size: 11px; font-weight: 600; color: var(--ink); }
.spec-table td { padding: 7px 11px; border: 1px solid var(--seam); color: var(--ink-soft); }
.spec-table tr:nth-child(even) td { background: var(--parchment); }
.alert-note { font-size: 13px; font-weight: 600; color: var(--rust); margin-top: 12px; }

/* ============================================================
   PORTFOLIO PAGE
   ============================================================ */
.quality-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quality-card { background: var(--white); border: 1px solid var(--seam); border-radius: var(--r); padding: 24px; }
.quality-card-icon {
  width: 40px; height: 40px;
  background: var(--parchment);
  border: 1px solid var(--seam);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; color: var(--ink-soft);
  margin-bottom: 14px;
}
.quality-card h3 { font-size: 14px; font-weight: 700; color: var(--ink); font-family: 'Inter', sans-serif; margin-bottom: 12px; }
.quality-card p  { font-size: 13px; color: var(--ink-soft); line-height: 1.7; margin-bottom: 12px; }
.quality-list { list-style: none; }
.quality-list li { display: flex; align-items: flex-start; gap: 7px; font-size: 12.5px; color: var(--ink-soft); padding: 4px 0; line-height: 1.45; }
.quality-check { color: var(--steel); flex-shrink: 0; font-size: 11px; margin-top: 2px; }
.facility-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 14px; }
.facility-stat { background: var(--parchment); border: 1px solid var(--seam); border-radius: 8px; padding: 12px; text-align: center; }
.facility-stat-num   { font-family: 'Fraunces', serif; font-size: 22px; font-weight: 300; color: var(--ink); line-height: 1; }
.facility-stat-label { font-size: 11px; color: var(--ink-mute); margin-top: 3px; }

/* ============================================================
   RESOURCES PAGE
   ============================================================ */
.resource-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.resource-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: box-shadow .2s;
}
.resource-card:hover { box-shadow: 0 4px 20px rgba(20,24,29,.08); }
.resource-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px; }
.resource-icon.pdf { background: #FEF2F2; color: #DC2626; }
.resource-icon.img-file { background: #F0FDF4; color: #16A34A; }
.resource-title { font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 6px; font-family: 'Inter', sans-serif; }
.resource-desc  { font-size: 12px; color: var(--ink-mute); line-height: 1.65; flex: 1; margin-bottom: 16px; }
.resource-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: background .15s;
}
.resource-btn:hover { background: var(--ink-soft); color: #fff; }

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-side h2 { font-size: 26px; font-weight: 300; margin-bottom: 22px; }
.contact-info-card {
  background: var(--white);
  border: 1px solid var(--seam);
  border-radius: var(--r);
  padding: 16px;
  display: flex;
  align-items: flex-start;
  gap: 13px;
  margin-bottom: 10px;
}
.contact-ico {
  width: 38px; height: 38px;
  background: var(--parchment);
  border: 1px solid var(--seam);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-soft); font-size: 14px; flex-shrink: 0;
}
.contact-card-title { font-size: 12px; font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.contact-card-text  { font-size: 13px; color: var(--ink-soft); line-height: 1.6; }
.contact-card-text a { color: var(--ink-soft); }
.contact-card-text a:hover { color: var(--ink); text-decoration: underline; }

.hours-box { background: var(--ink); border-radius: var(--r); padding: 16px 20px; margin-top: 14px; color: #fff; }
.hours-box .title   { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.hours-box .hours   { font-size: 13px; color: rgba(255,255,255,.65); }
.hours-box .note    { font-size: 11px; color: rgba(255,255,255,.35); margin-top: 2px; }

.form-card { background: var(--white); border: 1px solid var(--seam); border-radius: var(--r-lg); padding: 30px 32px; }
.form-card h2 { font-size: 20px; font-weight: 300; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
.form-input, .form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--seam);
  border-radius: 8px;
  font-size: 13px;
  font-family: 'Inter', sans-serif;
  color: var(--ink);
  background: var(--parchment);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.form-input:focus, .form-textarea:focus {
  border-color: var(--steel);
  box-shadow: 0 0 0 3px rgba(31,58,95,.12);
  background: var(--white);
}
.form-textarea { resize: none; height: 108px; }
.form-submit {
  width: 100%;
  padding: 12px 24px;
  background: var(--ink);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.form-submit:hover { background: var(--ink-soft); }
.form-submit:disabled { opacity: .6; cursor: not-allowed; }
.form-success {
  display: flex; align-items: center; gap: 12px;
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 13px;
  color: #15803D;
  margin-top: 16px;
}
.form-success-hidden { display: none; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--ink); }
.footer-main { padding: 60px 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; }
.footer-brand-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.footer-logo { width: 44px; height: 44px; border-radius: 10px; object-fit: contain; filter: invert(1); mix-blend-mode: lighten; border: none; }
.footer-brand-name { font-size: 14px; font-weight: 700; color: #fff; }
.footer-brand-sub  { font-size: 11px; color: rgba(255,255,255,.8); margin-top: 1px; }
.footer-desc { font-size: 13px; color: rgba(255,255,255,.85); line-height: 1.75; margin-bottom: 16px; }
.footer-badges { display: flex; align-items: center; gap: 8px; }
.footer-badge { width: 64px; height: 64px; object-fit: contain; }

.footer-heading {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255,255,255,.7);
  margin-bottom: 14px;
}
.footer-nav-list { list-style: none; }
.footer-nav-list li { margin-bottom: 8px; }
.footer-nav-list a {
  font-size: 13px;
  color: #fff;
  transition: color .15s;
  display: flex; align-items: center; gap: 8px;
}
.footer-nav-list a:hover { color: #fff; }
.footer-nav-list a::before { content: '·'; color: rgba(255,255,255,.5); }

.footer-contact-row { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 13px; }
.footer-contact-row span { color: rgba(255,255,255,.7); flex-shrink: 0; margin-top: 1px; }
.footer-contact-row a, .footer-contact-row p { color: #fff; line-height: 1.6; }
.footer-contact-row a:hover { color: #fff; }

.footer-copy { border-top: 1px solid rgba(255,255,255,.07); padding: 16px 0; }
.footer-copy .container { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: rgba(255,255,255,.65); }

/* ============================================================
   SHARED UTILITIES
   ============================================================ */
.bg-white   { background: var(--white); }
.bg-warm    { background: var(--parchment); }
.bg-parchment { background: var(--parchment); }
.border-b   { border-bottom: 1px solid var(--seam); }
.mb-2  { margin-bottom: 8px; }
.mb-4  { margin-bottom: 16px; }
.mb-6  { margin-bottom: 24px; }
.mb-10 { margin-bottom: 40px; }
.mb-14 { margin-bottom: 56px; }
.mt-4  { margin-top: 16px; }
.mt-6  { margin-top: 24px; }
.mt-10 { margin-top: 40px; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 22px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
  border: none;
  font-family: 'Inter', sans-serif;
}
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #2a3040; color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--seam); color: var(--ink-soft); }
.btn-outline:hover { border-color: var(--ink-mute); color: var(--ink); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .usp-grid { grid-template-columns: repeat(2, 1fr); }
  .service-card-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-strip .container { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-h: 98px; }
  .topbar { display: none; }
  .nav-links, .nav-badges { display: none !important; }
  .hamburger { display: flex; }

  .home-hero { flex-direction: column; }
  .hero-panel { width: 100%; padding: 40px 24px; }
  .hero-carousel { width: 100%; height: 260px; position: relative; }

  .stats-strip .container { grid-template-columns: repeat(2, 1fr); }
  .usp-grid { grid-template-columns: 1fr; }
  .product-panel.active { grid-template-columns: repeat(2, 1fr); }

  .testi-card { flex-direction: column; }
  .testi-img { width: 100%; height: 200px; }
  .testi-list { grid-template-columns: 1fr; }

  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .about-split { grid-template-columns: 1fr; }
  .about-photo { position: static; }

  .service-card-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-body { flex-direction: column; }
  .product-detail-body.rev { flex-direction: column; }
  .detail-img { width: 100%; }

  .quality-grid { grid-template-columns: 1fr; }
  .resource-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-copy .container { flex-direction: column; gap: 4px; text-align: center; }
}

@media (max-width: 480px) {
  .product-panel.active { grid-template-columns: 1fr; }
  .resource-grid { grid-template-columns: 1fr; }
  .service-card-grid { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 26px; }
}