/* ==========================================================================
   Smruthi Chemicals and Intermediates (SCI) — Design System & Styles
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --color-primary: #0B3D62;
  --color-primary-dark: #082C47;
  --color-primary-light: #1B5A8C;
  --color-secondary: #0E7C86;
  --color-secondary-light: #12A0AD;
  --color-accent: #F2994A;
  --color-accent-dark: #D9781F;

  --color-ink: #12181F;
  --color-text: #33404D;
  --color-text-muted: #5B6B79;
  --color-border: #E1E7EC;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F5F8FA;
  --color-surface-dark: #0A2438;
  --color-surface-darker: #071A29;

  --color-success: #1E8E5A;
  --color-success-bg: #E9F7EF;
  --color-error: #C7402B;
  --color-error-bg: #FCEEEC;

  /* Typography */
  --font-heading: 'Poppins', 'Segoe UI', Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;

  --fs-h1: clamp(2.2rem, 1.6rem + 2.6vw, 3.6rem);
  --fs-h2: clamp(1.7rem, 1.4rem + 1.4vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 1.1rem + 0.7vw, 1.6rem);
  --fs-h4: 1.15rem;
  --fs-body-lg: 1.15rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-tiny: 0.75rem;

  /* Spacing scale (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 6rem;

  /* Layout */
  --container-max: 1300px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(11, 61, 98, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 61, 98, 0.10);
  --shadow-lg: 0 20px 48px rgba(11, 61, 98, 0.16);

  --transition-fast: 0.18s ease;
  --transition-base: 0.3s ease;
  --header-height: 80px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); font-weight: 600; }

p { font-size: var(--fs-body); color: var(--color-text); }
.lead { font-size: var(--fs-body-lg); color: var(--color-text-muted); }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 3.2vw, 2.75rem);
}
@media (max-width: 640px) {
  .container { padding-inline: var(--space-5); }
}

.section { padding-block: var(--space-10); }
.section--sm { padding-block: var(--space-8); }
.section--alt { background: var(--color-surface-alt); }
.section--dark {
  background: linear-gradient(160deg, var(--color-surface-dark), var(--color-surface-darker));
  color: #D7E3EC;
}
.section--dark h2, .section--dark h3, .section--dark h4 { color: #FFFFFF; }
.section--dark p { color: #AEC2D1; }

.section-head {
  max-width: 720px;
  margin-bottom: var(--space-8);
}
.section-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  display: inline-block;
}

.section-head h2 { margin-bottom: var(--space-4); }

.grid {
  display: grid;
  gap: var(--space-6);
}
.grid > * { min-width: 0; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.icon {
  width: 1em;
  height: 1em;
  fill: none;
  stroke: currentColor;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: 0.3px;
  padding: 0.9rem 1.7rem;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.btn .icon { width: 18px; height: 18px; transition: transform var(--transition-fast); }
.btn:hover .icon { transform: translateX(3px); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-secondary {
  background: var(--color-primary);
  color: #fff;
}
.btn-secondary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn-outline:hover { border-color: var(--color-primary); background: var(--color-surface-alt); }

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

.btn-block { width: 100%; }
.btn-lg { padding: 1.05rem 2.1rem; font-size: var(--fs-body); }

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), height var(--transition-base), background var(--transition-base);
}
.site-header.is-scrolled {
  height: 68px;
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand { display: flex; align-items: center; }
.brand img { height: 44px; width: auto; transition: height var(--transition-base); }
.site-header.is-scrolled .brand img { height: 36px; }

.main-nav { display: flex; }
.nav-list { display: flex; align-items: center; gap: var(--space-4); }
.nav-list a {
  position: relative;
  font-family: var(--font-heading);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--color-text);
  padding-block: var(--space-2);
  white-space: nowrap;
}
.nav-list a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}
.nav-list a:hover { color: var(--color-primary); }
.nav-list a:hover::after { width: 100%; }
.nav-list a.active { color: var(--color-primary); font-weight: 600; }
.nav-list a.active::after { width: 100%; }

.header-cta { display: flex; align-items: center; gap: var(--space-4); }

.nav-toggle {
  display: none;
  padding: var(--space-2);
  color: var(--color-primary);
}
.nav-toggle .icon { width: 26px; height: 26px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle.is-active .icon-menu { display: none; }
.nav-toggle.is-active .icon-close { display: block; }

@media (max-width: 960px) {
  .header-cta .btn-outline { display: none; }
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--color-border);
  }
  .main-nav.is-open { max-height: 480px; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4) var(--space-6) var(--space-6);
  }
  .nav-list li { border-bottom: 1px solid var(--color-border); }
  .nav-list li:last-child { border-bottom: none; }
  .nav-list a { display: block; padding: var(--space-4) 0; white-space: normal; }
  .nav-list a::after { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: stretch;
  padding-top: var(--header-height);
  padding-bottom: 0;
  background: linear-gradient(155deg, var(--color-surface-dark) 0%, var(--color-primary) 55%, var(--color-secondary) 130%);
  color: #fff;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover; opacity: 0.48;
  animation: kenburns 26s ease-in-out infinite alternate;
  transform-origin: 60% 40%;
}
@keyframes kenburns {
  from { transform: scale(1); }
  to { transform: scale(1.09) translate(-1.2%, -1%); }
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(105deg, rgba(7, 22, 36, 0.88) 0%, rgba(11, 61, 98, 0.62) 48%, rgba(14, 124, 134, 0.28) 100%),
    radial-gradient(rgba(255,255,255,0.08) 1.5px, transparent 1.5px);
  background-size: auto, 26px 26px;
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  width: 100%;
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.95fr);
  gap: clamp(1.75rem, 3.5vw, 4rem);
  align-items: stretch;
  padding-top: clamp(1.4rem, 2.4vh, 2.4rem);
  padding-bottom: clamp(1.4rem, 2.4vh, 2.2rem);
}
.hero-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-content .eyebrow { color: #8FE0E6; margin-bottom: var(--space-3); }
.hero-content .eyebrow::before { background: var(--color-accent); }
.hero h1 {
  color: #fff;
  margin-bottom: 1.1rem;
  font-size: clamp(2.05rem, 1.35rem + 2.5vw, 3.45rem);
  max-width: 18ch;
}
.hero-sub {
  font-size: clamp(1.02rem, 0.95rem + 0.35vw, 1.2rem);
  color: #CBE0EC;
  margin-bottom: 1.5rem;
  max-width: 42rem;
  overflow-wrap: break-word;
  line-height: 1.6;
}

.home-intro { padding-block: var(--space-8); }
.home-intro-copy {
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}
.home-intro-copy p {
  font-size: var(--fs-body-lg);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.home-intro-copy p:last-child { margin-bottom: 0; color: var(--color-text-muted); }
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-bottom: 1.6rem; }

.hero-stats {
  display: flex;
  gap: clamp(1.5rem, 3vw, 3rem);
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 1.35rem;
  border-top: 1px solid rgba(255,255,255,0.18);
}
.hero-stat .stat-num {
  font-family: var(--font-heading);
  font-size: clamp(1.7rem, 1.4rem + 0.8vw, 2.15rem);
  font-weight: 700;
  color: #fff;
  display: block;
}
.hero-stat .stat-label {
  font-size: var(--fs-small);
  color: #AEC7D6;
}

/* ---------- Trust bar ---------- */
.trust-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-6);
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-sm);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.trust-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}
.trust-item .icon {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.trust-item strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 600;
}
.trust-item span {
  display: block;
  font-size: var(--fs-tiny);
  color: var(--color-text-muted);
  line-height: 1.45;
}
@media (max-width: 900px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .trust-grid { grid-template-columns: 1fr; }
}

/* ---------- Visual mosaic ---------- */
.visual-mosaic {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-5);
  margin-top: var(--space-8);
}
.visual-mosaic figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  min-height: 240px;
  box-shadow: var(--shadow-md);
}
.visual-mosaic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3.2;
  transition: transform 0.7s ease;
}
.visual-mosaic figure:hover img { transform: scale(1.05); }
.visual-mosaic figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 2.4rem var(--space-4) var(--space-4);
  background: linear-gradient(to top, rgba(7, 22, 36, 0.88), transparent);
  color: #F3F8FC;
  font-size: var(--fs-small);
  font-weight: 600;
  font-family: var(--font-heading);
}
@media (max-width: 860px) {
  .visual-mosaic { grid-template-columns: 1fr; }
  .visual-mosaic figure { min-height: 200px; }
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: stretch;
}

/* Reactor panel: animated technical illustration card in the hero */
.reactor-panel {
  width: 100%;
  max-width: none;
  position: relative;
  overflow: hidden;
  background: linear-gradient(165deg, #0F2A42 0%, #0B1F32 70%, #0A1B2B 100%);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2vw, 28px);
  box-shadow: 0 30px 70px rgba(5, 14, 23, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(207, 224, 236, 0.16);
  opacity: 0;
  transform: translateY(26px) scale(0.985);
  animation: rise 0.9s 0.3s ease forwards;
}
.reactor-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(560px 300px at 80% 0%, rgba(242, 153, 74, 0.14), transparent 60%);
}
@keyframes rise {
  to { opacity: 1; transform: none; }
}
.rp-head { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); position: relative; }
.rp-head .t { color: #CFE0EC; font-size: 0.82rem; font-weight: 600; letter-spacing: 0.03em; }
.rp-head .badge {
  color: #FFD79A;
  background: rgba(242, 153, 74, 0.14);
  border: 1px solid rgba(242, 153, 74, 0.4);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
}
.reactor-svg { width: 100%; height: auto; position: relative; display: block; }
.rp-foot { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-3); position: relative; }
.rp-foot .cell { flex: 1; min-width: 110px; border: 1px solid rgba(207, 224, 236, 0.18); border-radius: 10px; padding: 10px 14px; }
.rp-foot .cv { color: #fff; font-weight: 700; font-size: 1rem; }
.rp-foot .ck { color: #8FA9BC; font-size: 0.72rem; margin-top: 2px; }

/* Reactor SVG animation primitives */
.flowdash { stroke-dasharray: 6 8; animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -14; } }
.bub { animation: bubble linear infinite; }
@keyframes bubble {
  0% { transform: translateY(0); opacity: 0; }
  12% { opacity: 0.85; }
  85% { opacity: 0.7; }
  100% { transform: translateY(-100px); opacity: 0; }
}
.needle {
  transform-origin: 100px 100px;
  transform: rotate(-118deg);
  animation: sweep 2.4s 0.6s cubic-bezier(0.3, 0.9, 0.35, 1) forwards;
}
@keyframes sweep { to { transform: rotate(28deg); } }
.heat-sh { animation: heatpulse 3.2s ease-in-out infinite; }
@keyframes heatpulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 0.75; } }

@media (max-width: 900px) {
  .hero {
    min-height: 0;
    padding-top: var(--header-height);
  }
  .hero .container {
    grid-template-columns: 1fr;
    text-align: left;
    padding-top: 1.35rem;
    padding-bottom: 1.6rem;
  }
  .hero h1 { max-width: none; }
  .hero-visual { max-width: 440px; margin-inline: auto; width: 100%; }
  .hero-stats { margin-top: 1.25rem; }
}
@media (max-width: 560px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; white-space: nowrap; }
  .hero-stats { gap: var(--space-5); }
  .hero-stat { flex: 1 1 42%; }
  .hero { padding-bottom: 1.35rem; }
  .brand img { height: 34px; }
}

/* Anchor targets for single-page nav: offset scroll so the fixed header
   never covers a section's heading when jumped to via nav/back-to-top. */
section[id] { scroll-margin-top: 90px; }

/* ---------- Cards ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }

.card-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  margin-bottom: var(--space-5);
}
.card-icon .icon { width: 28px; height: 28px; }
.card h3, .card h4 { margin-bottom: var(--space-3); }
.card p { color: var(--color-text-muted); }

.card-list { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.card-list li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}
.card-list .icon { width: 18px; height: 18px; color: var(--color-secondary); flex-shrink: 0; margin-top: 3px; }

/* Feature list (bulleted content lists) */
.feature-list { display: grid; gap: var(--space-4); }
.feature-list li {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-secondary);
}
.feature-list .icon { width: 20px; height: 20px; color: var(--color-secondary); flex-shrink: 0; margin-top: 2px; }
.feature-list p { margin: 0; }

/* ---------- Stat band ---------- */
.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}
.stat-band .stat-num {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
}
.stat-band .stat-label { color: var(--color-text-muted); font-size: var(--fs-small); }
@media (max-width: 760px) {
  .stat-band { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Split section (image/content) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
.split > * { min-width: 0; }
.split.reverse .split-media { order: 2; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
}
.split-media svg, .split-media img { width: 100%; height: auto; border-radius: var(--radius-lg); }

/* ---------- Photo band (full-bleed photo + dark overlay: heritage, final CTA) ---------- */
.photo-band {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-10);
  color: #C9D8E3;
}
.photo-band .bg { position: absolute; inset: 0; z-index: 0; }
.photo-band .bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.4; }
.photo-band .bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(95deg, rgba(11,31,50,0.96) 0%, rgba(14,42,66,0.88) 55%, rgba(17,52,80,0.72) 100%);
}
.photo-band .container { position: relative; z-index: 1; }
.photo-band h2, .photo-band h3, .photo-band h4 { color: #fff; }
.photo-band p { color: #B6CBDA; }

.heritage-layout { display: grid; grid-template-columns: auto 1fr; gap: clamp(28px, 4vw, 60px); align-items: center; }
.her-year {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 7vw, 5.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1;
  position: relative;
  padding-bottom: var(--space-3);
}
.her-year::after { content: ''; position: absolute; left: 4px; bottom: 0; width: 64%; height: 5px; background: var(--color-accent); border-radius: 3px; }
.her-year small { display: block; font-size: 0.95rem; font-weight: 600; color: #8FC5E3; margin-top: var(--space-3); font-family: var(--font-body); }
@media (max-width: 640px) { .heritage-layout { grid-template-columns: 1fr; } }

.photo-band.cta-photo { text-align: center; padding-block: clamp(84px, 10vw, 140px); }
.photo-band.cta-photo .container { max-width: 820px; }
.photo-band.cta-photo p { max-width: 56ch; margin: var(--space-3) auto var(--space-6); }

/* ---------- Real photo panels (About, hero-adjacent) ---------- */
.photo-panel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 320px;
  box-shadow: var(--shadow-lg);
  background: radial-gradient(700px 380px at 70% 20%, rgba(95,176,214,0.28), transparent 60%), linear-gradient(150deg, var(--color-secondary), var(--color-primary));
}
.photo-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image: radial-gradient(rgba(207,234,247,0.35) 1.2px, transparent 1.2px);
  background-size: 26px 26px;
}
.photo-panel img { position: relative; width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3.1; }
.photo-cap {
  position: absolute;
  left: var(--space-4);
  bottom: var(--space-4);
  background: rgba(14,36,56,0.82);
  backdrop-filter: blur(6px);
  color: #E8F1F7;
  font-size: var(--fs-small);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-5); }
.chip {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-secondary);
}

/* ---------- Molecule meta row (Metol) ---------- */
.mol-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  border-top: 1px dashed var(--color-border);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  flex-wrap: wrap;
}
.mol-meta div { font-size: var(--fs-tiny); color: var(--color-text-muted); }
.mol-meta b { display: block; color: var(--color-primary); font-size: var(--fs-small); font-weight: 600; }

/* ---------- Advantage blocks (Why Choose Us) ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
.advantage {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.advantage:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.advantage-num {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.85;
}
.advantage h3 { margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-3); }
.advantage h3 .icon { width: 26px; height: 26px; color: var(--color-secondary); flex-shrink: 0; }
.advantage p { color: var(--color-text-muted); max-width: none; }
@media (max-width: 860px) {
  .advantage-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .advantage { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* ---------- Manufacturing scale cards ---------- */
.scale-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
@media (max-width: 900px) { .scale-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .scale-grid { grid-template-columns: 1fr; } }
.scale-card {
  padding: var(--space-6) var(--space-5);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: left;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.scale-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.scale-card .scale-index {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-secondary);
  font-size: var(--fs-small);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: block;
}
.signal-icon { width: 40px; height: 40px; margin-bottom: var(--space-4); }
.signal-icon .bar { fill: var(--color-border); }
.signal-icon .bar.on { fill: var(--color-accent); }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.cta-banner h2, .cta-banner p { color: #fff; }
.cta-banner p { color: #E1F0F3; margin-top: var(--space-2); }
.cta-banner-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* ---------- Product highlight ---------- */
.product-hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-8);
  align-items: start;
}
.product-visual { display: grid; gap: var(--space-5); }
.molecule-card { padding: var(--space-5); }
.cmo-banner {
  margin: 0 0 var(--space-8);
  min-height: 280px;
}
.cmo-banner img { aspect-ratio: 21 / 8; min-height: 240px; }
@media (max-width: 860px) { .product-hero { grid-template-columns: 1fr; } }
.product-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-heading);
  font-size: var(--fs-tiny);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-4);
}
.spec-list { display: grid; gap: var(--space-3); margin-top: var(--space-6); }
.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: var(--fs-small);
}
.spec-list .spec-key { color: var(--color-text-muted); }
.spec-list .spec-val { font-weight: 600; color: var(--color-primary); text-align: right; }

/* ---------- Confidential notice ---------- */
.notice {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  background: #FFF6EC;
  border: 1px solid #F5D9B5;
}
.notice > div { min-width: 0; }
.notice .icon { width: 26px; height: 26px; color: var(--color-accent-dark); flex-shrink: 0; }
.notice .btn { white-space: normal; }
.notice h4 { color: var(--color-accent-dark); margin-bottom: var(--space-2); }

/* ---------- Accordion ---------- */
.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  overflow: hidden;
}
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5);
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-surface);
}
.accordion-trigger .icon { width: 20px; height: 20px; color: var(--color-secondary); transition: transform var(--transition-base); flex-shrink: 0; }
.accordion-trigger[aria-expanded="true"] .icon { transform: rotate(180deg); }
.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
  background: var(--color-surface-alt);
}
.accordion-panel-inner { padding: 0 var(--space-5) var(--space-5); color: var(--color-text-muted); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.form-grid > * { min-width: 0; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: var(--space-2); min-width: 0; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-primary);
}
.form-group label .req { color: var(--color-error); margin-left: 2px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  min-width: 0;
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 4px rgba(14, 124, 134, 0.12);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-error {
  font-size: var(--fs-tiny);
  color: var(--color-error);
  min-height: 1em;
  display: none;
}
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--color-error);
}
.form-group.has-error .form-error { display: block; }

.form-status {
  display: none;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-5);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-5);
  font-size: var(--fs-small);
}
.form-status.is-visible { display: flex; }
.form-status.success { background: var(--color-success-bg); color: var(--color-success); }
.form-status.error { background: var(--color-error-bg); color: var(--color-error); }
.form-status .icon { width: 22px; height: 22px; flex-shrink: 0; }

/* ---------- Contact info ---------- */
.contact-info-list { display: grid; gap: var(--space-5); }
.contact-info-item { display: flex; gap: var(--space-4); align-items: flex-start; }
.contact-info-item .card-icon { width: 46px; height: 46px; margin-bottom: 0; flex-shrink: 0; }
.contact-info-item .card-icon .icon { width: 22px; height: 22px; }
.contact-info-item h4 { margin-bottom: var(--space-1); }
.contact-info-item p { color: var(--color-text); font-size: var(--fs-small); }
.contact-info-item a {
  color: var(--color-primary);
  font-weight: 600;
  word-break: break-word;
}
.contact-info-item a:hover { color: var(--color-secondary); }
.phone-stack { display: grid; gap: 0.2rem; }

.map-block { margin-top: var(--space-9); }
.map-block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
}
.map-block-head h3 { margin: 0; }
.map-link {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-secondary);
}
.map-link:hover { color: var(--color-primary); }
.map-address {
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  margin-bottom: var(--space-4);
}
.map-wrap {
  margin-top: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  background: #e8eef2;
  min-height: 380px;
}
.map-embed {
  width: 100%;
  height: 380px;
  border: 0;
  display: block;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-surface-darker);
  color: #AEC2D1;
  padding-top: var(--space-9);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-7);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-logo-card {
  display: inline-block;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.footer-brand img { display: block; height: 30px; }
.footer-brand p { color: #8CA3B4; font-size: var(--fs-small); max-width: 320px; }
.footer-col h4 { color: #fff; margin-bottom: var(--space-4); font-size: var(--fs-body); }
.footer-links { display: grid; gap: var(--space-3); }
.footer-links a { font-size: var(--fs-small); color: #AEC2D1; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-accent); }
.footer-contact-item { display: flex; gap: var(--space-3); align-items: flex-start; margin-bottom: var(--space-4); font-size: var(--fs-small); }
.footer-contact-item .icon { width: 18px; height: 18px; color: var(--color-secondary-light); margin-top: 2px; flex-shrink: 0; }
.footer-contact-item a { color: #AEC2D1; word-break: break-word; }
.footer-contact-item a:hover { color: var(--color-accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-5);
  font-size: var(--fs-tiny);
  color: #6E869A;
  flex-wrap: wrap;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: var(--space-6);
  bottom: var(--space-6);
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-fast);
  z-index: 900;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-accent); }
.back-to-top .icon { width: 20px; height: 20px; }

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-reveal].is-revealed { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero-bg img { animation: none; transform: none; }
  .reactor-panel { animation: none; opacity: 1; transform: none; }
  .bub { animation: none; opacity: 0; }
  .needle { animation: none; transform: rotate(28deg); }
  .flowdash { animation: none; }
  .heat-sh { animation: none; opacity: 0.6; }
  .visual-mosaic figure:hover img { transform: none; }
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  z-index: 2000;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-4); }