/* ═══════════════════════════════════════════════════════
   NIRVED ROBOTICS — style.css
   Light-themed, elegant, premium design
═══════════════════════════════════════════════════════ */

/* ─── CSS Reset & Base ─── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colour Palette */
  --clr-bg:           #F8F7F4;
  --clr-surface:      #FFFFFF;
  --clr-surface-2:    #F2EFE9;
  --clr-border:       #E5E0D8;

  --clr-gold:         #C9A96E;
  --clr-gold-light:   #E8D5B7;
  --clr-gold-dark:    #A8884A;

  --clr-navy:         #1A2340;
  --clr-navy-mid:     #2C3A5C;
  --clr-accent:       #3D5A99;
  --clr-accent-light: #E8EDF8;

  --clr-text-primary:   #1A1A2E;
  --clr-text-secondary: #5A5A72;
  --clr-text-muted:     #9A94A4;

  /* Typography */
  --font-serif:   'Playfair Display', Georgia, serif;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-space:   'Space Grotesk', system-ui, sans-serif;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  24px;
  --radius-xl:  36px;
  --radius-pill:9999px;

  /* Shadow */
  --shadow-sm:  0 2px 8px rgba(26,35,64,0.06);
  --shadow-md:  0 8px 32px rgba(26,35,64,0.1);
  --shadow-lg:  0 20px 60px rgba(26,35,64,0.14);

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--clr-bg);
  color: var(--clr-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─── Particles canvas ─── */
#tsparticles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

/* ─── Global utilities ─── */
.container {
  width: 92%;
  max-width: 1280px;
  margin: 0 auto;
}

.section {
  padding: var(--space-3xl) 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-xl);
}

.section-overline {
  font-family: var(--font-space);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-gold-dark);
  margin-bottom: var(--space-xs);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-navy);
  margin-bottom: var(--space-sm);
}
.section-title em {
  font-style: italic;
  color: var(--clr-gold-dark);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--clr-text-secondary);
}

/* ─── Buttons ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  color: white;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-space);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(168,136,74,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(168,136,74,0.5);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--clr-navy);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-space);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--clr-border);
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover {
  border-color: var(--clr-gold);
  color: var(--clr-gold-dark);
  background: rgba(201,169,110,0.06);
}

.btn-full { width: 100%; justify-content: center; }

/* ══════════════════════════════════════════
   HEADER & NAV
══════════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 0.6rem 0;
}

.nav-container {
  width: 92%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand { display: flex; align-items: center; text-decoration: none; }
.nav-logo {
  height: 70px;
  width: auto;
  transition: var(--transition);
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.08));
}
.nav-logo:hover { opacity: 0.85; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-link {
  font-family: var(--font-space);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--clr-text-primary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--clr-gold-dark), var(--clr-gold));
  transition: width var(--transition);
  border-radius: 2px;
}
.nav-link:hover { color: var(--clr-gold-dark); }
.nav-link:hover::after { width: 100%; }

.nav-cta {
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  color: white !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-space);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(168,136,74,0.3);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(168,136,74,0.45);
}

/* hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-navy);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════════
   HERO
══════════════════════════════════════════ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-xl);
  padding: 8rem 6% 5rem;
  /* overflow:hidden removed — was clipping the float animation on the robot card */
}

/* decorative bg gradient */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(201,169,110,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 5% 80%, rgba(61,90,153,0.08) 0%, transparent 60%);
  z-index: -1;
}

.hero-content { max-width: 600px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(201,169,110,0.12);
  border: 1px solid var(--clr-gold-light);
  color: var(--clr-gold-dark);
  font-family: var(--font-space);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-md);
}

.badge-dot {
  width: 7px; height: 7px;
  background: var(--clr-gold);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 5.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--clr-navy);
  margin-bottom: var(--space-md);
}
.hero-title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-lg);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-navy);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-top: 2px;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--clr-border);
}

/* ── Hero Visual ── */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
  /* overflow intentionally NOT hidden — float animation needs room */
}

.hero-image-ring {
  position: absolute;
  border-radius: 50%;
  border-style: solid;
  border-color: rgba(201,169,110,0.25);
}
.ring-outer  { width: 420px; height: 420px; border-width: 1px; animation: spin 30s linear infinite; }
.ring-middle { width: 320px; height: 320px; border-width: 1.5px; border-color: rgba(61,90,153,0.2); animation: spin 20s linear infinite reverse; }
.ring-inner  { width: 220px; height: 220px; border-width: 2px; border-color: rgba(201,169,110,0.35); animation: spin 12s linear infinite; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.hero-robot-card {
  position: relative;
  z-index: 2;
  width: 260px;
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-border);
  transition: transform var(--transition-slow);
  animation: float 5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-16px); }
}

@keyframes float-sm {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

.hero-robot-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.hero-card-label {
  padding: 0.8rem 1rem;
  background: var(--clr-surface);
}
.card-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.3rem;
}
.hero-card-label p {
  font-family: var(--font-space);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--clr-navy);
}

/* scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 2;
}
.hero-scroll span {
  font-family: var(--font-space);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--clr-gold), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50%       { opacity: 1;   transform: scaleY(1);   transform-origin: top; }
}

/* ══════════════════════════════════════════
   ABOUT
══════════════════════════════════════════ */
.about {
  background: var(--clr-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-text .section-title { text-align: left; margin-bottom: var(--space-md); }
.about-text .section-overline { text-align: left; }

.about-body {
  color: var(--clr-text-secondary);
  margin-bottom: var(--space-md);
  font-size: 1.02rem;
  line-height: 1.8;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--clr-surface-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}
.highlight-item:hover {
  border-color: var(--clr-gold-light);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.highlight-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.highlight-item h4 {
  font-family: var(--font-space);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--clr-navy);
  margin-bottom: 2px;
}
.highlight-item p {
  font-size: 0.85rem;
  color: var(--clr-text-secondary);
}

/* About visual */
.about-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}

.about-cards-stack { position: relative; width: 280px; height: 340px; }

.about-card {
  position: absolute;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border);
}
.about-card img {
  width: 100%;
  object-fit: cover;
  display: block;
}

.about-card--back {
  width: 220px;
  top: 40px; right: -20px;
  transform: rotate(6deg);
  opacity: 0.7;
}
.about-card--back img { height: 200px; }

.about-card--front {
  width: 240px;
  top: 0; left: -10px;
  z-index: 2;
  transform: rotate(-3deg);
  transition: transform var(--transition);
}
.about-card--front:hover { transform: rotate(0deg) scale(1.03); }
.about-card--front img { height: 220px; }

.about-card-info {
  padding: 0.8rem 1rem;
}
.info-label {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--clr-navy);
}
.info-desc {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

.about-orb {
  position: absolute;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(201,169,110,0.15) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  animation: breathe 6s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50%       { transform: scale(1.12); opacity: 1; }
}

/* ══════════════════════════════════════════
   INDUSTRIES
══════════════════════════════════════════ */
.industries {
  background: var(--clr-surface-2);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.industry-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  transition: var(--transition);
  cursor: default;
}
.industry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-gold-light);
}
.industry-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  display: block;
}
.industry-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-navy);
  margin-bottom: 0.5rem;
}
.industry-card p {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
  line-height: 1.6;
}

/* ══════════════════════════════════════════
   PRODUCTS
══════════════════════════════════════════ */
.products { background: var(--clr-bg); }

/* Filter Tabs */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.filter-tab {
  font-family: var(--font-space);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--clr-text-secondary);
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
}
.filter-tab:hover {
  border-color: var(--clr-gold);
  color: var(--clr-gold-dark);
}
.filter-tab.active {
  background: linear-gradient(135deg, var(--clr-gold-dark), var(--clr-gold));
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(168,136,74,0.3);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.product-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-gold-light);
}

.product-card.hidden {
  display: none;
}

.product-img-wrap {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--clr-surface-2);
}
.product-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.product-card:hover .product-img-wrap img { transform: scale(1.06); }

.product-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  color: var(--clr-gold-dark);
  font-family: var(--font-space);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--clr-gold-light);
}

.product-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,35,64,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(2px);
}
.product-card:hover .product-overlay { opacity: 1; }

.overlay-btn {
  background: white;
  color: var(--clr-navy);
  font-family: var(--font-space);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.65rem 1.6rem;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  transform: translateY(8px);
}
.product-card:hover .overlay-btn { transform: translateY(0); }
.overlay-btn:hover {
  background: var(--clr-gold);
  color: white;
}

.product-info { padding: var(--space-sm) var(--space-md) var(--space-md); }

.product-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-navy);
  margin-bottom: 0.4rem;
}

.product-desc {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-link {
  display: inline-block;
  font-family: var(--font-space);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-gold-dark);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: var(--transition);
  letter-spacing: 0.02em;
}
.product-link:hover { color: var(--clr-gold); letter-spacing: 0.06em; }

/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
.contact {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-left .section-title,
.contact-left .section-overline { text-align: left; }

.contact-body {
  color: var(--clr-text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: var(--space-lg);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}
.contact-item:hover {
  border-color: var(--clr-gold-light);
  transform: translateX(4px);
}

.contact-icon { font-size: 1.3rem; }
.contact-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: 1px;
}
.contact-value {
  font-family: var(--font-space);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--clr-navy);
}
.contact-link {
  text-decoration: none;
  transition: color var(--transition);
}
.contact-link:hover { color: var(--clr-gold-dark); }

/* Contact Form */
.contact-form {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-md);
}
.form-group label {
  display: block;
  font-family: var(--font-space);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-primary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 0.72rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--clr-text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
.form-group textarea { resize: vertical; min-height: 110px; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--clr-gold);
  box-shadow: 0 0 0 3px rgba(201,169,110,0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--clr-text-muted);
}

.form-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--clr-gold-dark);
  margin-top: 0.75rem;
  min-height: 1.2em;
}

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.footer {
  background: var(--clr-navy);
  color: rgba(255,255,255,0.8);
  padding: var(--space-xl) 0 var(--space-md);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: var(--space-md);
}

.footer-logo {
  height: 54px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  margin-bottom: 0.75rem;
}

.footer-tagline {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.45);
  font-family: var(--font-space);
}

.footer-links-group h4 {
  font-family: var(--font-space);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-gold);
  margin-bottom: var(--space-sm);
}

.footer-links-group ul { list-style: none; }
.footer-links-group li { margin-bottom: 0.5rem; }
.footer-links-group a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links-group a:hover { color: var(--clr-gold); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}
.footer-credit { font-style: italic; }

/* ══════════════════════════════════════════
   MODAL
══════════════════════════════════════════ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26,35,64,0.65);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  background: var(--clr-surface);
  border-radius: var(--radius-xl);
  max-width: 820px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}
.modal-backdrop.open .modal-box {
  transform: scale(1) translateY(0);
}

/* scrollbar */
.modal-box::-webkit-scrollbar { width: 6px; }
.modal-box::-webkit-scrollbar-track { background: var(--clr-surface-2); }
.modal-box::-webkit-scrollbar-thumb { background: var(--clr-gold-light); border-radius: 3px; }

.modal-close {
  position: absolute;
  top: 1rem; right: 1rem;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: 50%;
  width: 36px; height: 36px;
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  z-index: 10;
}
.modal-close:hover {
  background: var(--clr-gold);
  color: white;
  border-color: transparent;
}

.modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.modal-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-xl) 0 0 var(--radius-xl);
  display: block;
}

.modal-body {
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.modal-badge {
  display: inline-block;
  background: rgba(201,169,110,0.12);
  border: 1px solid var(--clr-gold-light);
  color: var(--clr-gold-dark);
  font-family: var(--font-space);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

.modal-name {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-navy);
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.modal-desc {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--clr-text-secondary);
  margin-bottom: var(--space-lg);
}

.modal-cta {
  align-self: flex-start;
}

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 7rem 5% 5rem;
    min-height: auto;
    justify-items: center;
    text-align: center;
  }
  .hero-content { max-width: 100%; }
  .hero-subtitle { margin: 0 auto var(--space-lg); }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { min-height: 380px; max-width: 100%; }
  .ring-outer  { width: min(320px, 80vw); height: min(320px, 80vw); }
  .ring-middle { width: min(240px, 60vw); height: min(240px, 60vw); }
  .ring-inner  { width: min(160px, 40vw); height: min(160px, 40vw); }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .about-visual { display: none; }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  /* Hide scroll indicator — hero stacks vertically so it overlaps the robot visual */
  .hero-scroll { display: none !important; }
  .nav-logo { height: 60px; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    background: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem var(--space-xl) var(--space-xl);
    gap: var(--space-md);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 999;
  }
  .nav-links.open { transform: translateX(0); }
  .hamburger { display: flex; z-index: 1001; }
  .nav-cta { margin-top: var(--space-sm); }
  .nav-logo { height: 54px; }
  .hero-scroll { display: none !important; }
  .hero-visual { min-height: 300px; max-width: 100%; padding: 16px 0; }
  .hero-robot-card { width: min(200px, 50vw); animation: float-sm 5s ease-in-out infinite; }
  .ring-outer  { width: min(260px, 72vw); height: min(260px, 72vw); }
  .ring-middle { width: min(195px, 54vw); height: min(195px, 54vw); }
  .ring-inner  { width: min(130px, 36vw); height: min(130px, 36vw); }
  .industries-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .modal-content { grid-template-columns: 1fr; }
  .modal-img { border-radius: var(--radius-xl) var(--radius-xl) 0 0; aspect-ratio: 16/9; }
  .modal-body { padding: var(--space-lg); }
}

@media (max-width: 480px) {
  .section { padding: var(--space-2xl) 0; }
  .hero { padding: 6.5rem 5% 4rem; }
  .hero-title { font-size: clamp(2rem, 8vw, 2.8rem); }
  .hero-scroll { display: none !important; }
  .hero-visual { min-height: 260px; padding: 12px 0; }
  .hero-robot-card { animation: float-sm 5s ease-in-out infinite; }
  .ring-outer  { width: min(220px, 70vw); height: min(220px, 70vw); }
  .ring-middle { width: min(165px, 52vw); height: min(165px, 52vw); }
  .ring-inner  { width: min(110px, 35vw); height: min(110px, 35vw); }
  .product-grid { grid-template-columns: 1fr; }
  .filter-tabs { gap: 0.4rem; }
  .filter-tab { font-size: 0.76rem; padding: 0.45rem 0.9rem; }
  .contact-form { padding: var(--space-md); }
  .nav-logo { height: 46px; }
}

/* ─── Scroll Progress Bar ─── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-gold-dark), var(--clr-gold));
  z-index: 9999;
  width: 0%;
  transition: width 0.1s linear;
}

/* ─── Animated entrance line under nav ─── */
.site-header.scrolled::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-gold-light), transparent);
}