/* ═══════════════════════════════════════════════
   D10.3 Dust Analyzer — Redesigned CSS
   Agua Instruments
   ═══════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --agua-navy:    #0b2e4e;
  --agua-blue:    #0d7abf;
  --agua-blue-lt: #1a9be0;
  --agua-teal:    #0fa891;
  --agua-teal-lt: #17c9ae;
  --agua-white:   #ffffff;
  --agua-off:     #f0f6fb;
  --agua-surface: #e8f3fb;
  --agua-text:    #0f2035;
  --agua-muted:   #4a6580;
  --agua-border:  rgba(13, 122, 191, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 10px rgba(11,46,78,0.08);
  --shadow-md: 0 6px 24px rgba(11,46,78,0.12);
  --shadow-lg: 0 16px 48px rgba(11,46,78,0.18);

  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);

  --font-display: 'Montserrat','Segoe UI',sans-serif;
  --font-body:    'Montserrat','Segoe UI',sans-serif;
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  color: var(--agua-text);
  background: var(--agua-off);
  -webkit-font-smoothing: antialiased;
  margin: 0;
  padding: 0;
}

/* ═══════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════ */
.dust-hero {
  position: relative;
  height: 56vh;
  min-height: 360px;
  margin-top: 68px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.dust-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.45) saturate(0.8);
  transform: scale(1.03);
  transition: transform 8s ease;
}

.dust-hero:hover .dust-hero-bg {
  transform: scale(1.06);
}

.dust-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(11,46,78,0.85) 0%,
    rgba(13,122,191,0.45) 55%,
    rgba(15,168,145,0.25) 100%
  );
  z-index: 1;
}

.dust-hero-content {
  position: relative;
  z-index: 2;
  padding: 0 5vw;
  max-width: 720px;
}

.dust-hero-tag {
  display: inline-block;
  background: rgba(15,168,145,0.2);
  border: 1px solid rgba(15,168,145,0.5);
  color: var(--agua-teal-lt);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.dust-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--agua-white);
  line-height: 1.2;
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

.dust-hero-sub {
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  line-height: 1.75;
  color: rgba(255,255,255,0.82);
  margin: 0 0 1.5rem;
  max-width: 580px;
}

.dust-hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.dust-badge {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.28);
  color: var(--agua-white);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 50px;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}

/* ═══════════════════════════════════════════════
   PAGE WRAPPER
═══════════════════════════════════════════════ */
.dust-page-wrapper {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ═══════════════════════════════════════════════
   PARTNER STRIP
═══════════════════════════════════════════════ */
.dust-partner-strip {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  background: var(--agua-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--agua-border);
  padding: 1.75rem 2.25rem;
  position: relative;
  overflow: hidden;
}

.dust-partner-strip::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--agua-blue), var(--agua-teal));
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.dust-partner-logo {
  height: 64px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(11,46,78,0.1));
}

.dust-partner-text p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--agua-muted);
  margin: 0;
}

/* ═══════════════════════════════════════════════
   CARD BASE
═══════════════════════════════════════════════ */
.dust-card {
  background: var(--agua-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--agua-border);
  overflow: hidden;
  position: relative;
}

.dust-card-accent {
  height: 4px;
  background: linear-gradient(90deg, var(--agua-blue), var(--agua-teal));
}

.dust-card-body {
  padding: 2.25rem 2.5rem 2.5rem;
}

/* ── Section title ── */
.dust-section-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--agua-navy);
  margin: 0 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.005em;
}

.dust-section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.3em;
  background: linear-gradient(to bottom, var(--agua-blue), var(--agua-teal));
  border-radius: 2px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════
   INTRO GRID
═══════════════════════════════════════════════ */
.dust-intro-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: center;
}

.dust-intro-text p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--agua-muted);
  margin-bottom: 1rem;
}

.dust-intro-text p:last-child {
  margin-bottom: 0;
}

.dust-intro-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.dust-product-img {
  width: 100%;
  max-width: 280px;
  height: 320px;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--agua-border);
  background: var(--agua-off);
  padding: 1.25rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.dust-product-img:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

/* ═══════════════════════════════════════════════
   GALLERY GRID
═══════════════════════════════════════════════ */
.dust-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.dust-gallery-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.dust-gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--agua-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: block;
}

.dust-gallery-item img:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.dust-gallery-item span {
  font-size: 13px;
  font-weight: 600;
  color: var(--agua-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ═══════════════════════════════════════════════
   MEASURING PRINCIPLE GRID
═══════════════════════════════════════════════ */
.dust-principle-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 3rem;
  align-items: center;
}

.dust-principle-text p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--agua-muted);
  margin-bottom: 1rem;
}

.dust-principle-text p:last-child {
  margin-bottom: 0;
}

.dust-principle-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.dust-principle-img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--agua-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: block;
}

.dust-principle-img:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ═══════════════════════════════════════════════
   FEATURES / BENEFITS / APPLICATIONS
═══════════════════════════════════════════════ */
.dust-fba-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.dust-fba-block {
  background: var(--agua-off);
  border: 1px solid var(--agua-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.dust-fba-block::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--agua-blue), var(--agua-teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.dust-fba-block:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.dust-fba-block:hover::after {
  transform: scaleX(1);
}

/* icon circle */
.dust-fba-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--agua-blue), var(--agua-blue-lt));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.dust-fba-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--agua-white);
}

.dust-fba-icon--teal {
  background: linear-gradient(135deg, var(--agua-teal), var(--agua-teal-lt));
}

.dust-fba-icon--navy {
  background: linear-gradient(135deg, var(--agua-navy), var(--agua-blue));
}

.dust-fba-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--agua-navy);
  margin: 0;
  letter-spacing: 0.02em;
}

/* ── Lists ── */
.dust-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--agua-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--agua-white);
}

.dust-list li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--agua-muted);
  padding: 9px 1rem 9px 2.25rem;
  position: relative;
  border-bottom: 1px solid var(--agua-border);
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
}

.dust-list li:last-child {
  border-bottom: none;
}

.dust-list li:hover {
  background: var(--agua-surface);
  color: var(--agua-text);
  padding-left: 2.75rem;
}

.dust-list li::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--agua-blue), var(--agua-teal));
  transition: transform var(--transition);
}

.dust-list li:hover::before {
  transform: translateY(-50%) scale(1.4);
}

/* ═══════════════════════════════════════════════
   SETUP IMAGE (full-width bottom)
═══════════════════════════════════════════════ */
.dust-setup-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--agua-border);
}

.dust-setup-img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

.dust-setup-wrap:hover .dust-setup-img {
  transform: scale(1.02);
}

.dust-setup-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(11,46,78,0.85), transparent);
  color: var(--agua-white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1.5rem 1.5rem 1rem;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .dust-intro-grid {
    grid-template-columns: 1fr 240px;
    gap: 2rem;
  }

  .dust-principle-grid {
    grid-template-columns: 1fr 300px;
    gap: 2rem;
  }

  .dust-fba-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
}

@media (max-width: 900px) {
  .dust-hero {
    height: 48vh;
  }

  .dust-intro-grid,
  .dust-principle-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .dust-product-img {
    max-width: 240px;
    height: 260px;
    margin: 0 auto;
  }

  .dust-principle-img {
    max-width: 320px;
    margin: 0 auto;
  }

  .dust-fba-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .dust-fba-block {
    padding: 1.5rem 1.25rem;
  }

  .dust-card-body {
    padding: 1.75rem 1.75rem 2rem;
  }
}

@media (max-width: 720px) {
  .dust-hero {
    height: auto;
    min-height: 320px;
    padding: 4rem 0 3rem;
    margin-top: 60px;
  }

  .dust-hero-content {
    padding: 0 1.25rem;
  }

  .dust-hero-title {
    font-size: 1.6rem;
  }

  .dust-hero-sub {
    font-size: 0.92rem;
  }

  .dust-page-wrapper {
    padding: 1.5rem 0.75rem 3.5rem;
    gap: 1.5rem;
  }

  .dust-partner-strip {
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem;
    text-align: center;
  }

  .dust-partner-strip::before {
    width: 100%;
    height: 4px;
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .dust-card-body {
    padding: 1.5rem 1.25rem 1.75rem;
  }

  .dust-section-title {
    font-size: 1.15rem;
  }

  .dust-gallery-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .dust-gallery-item img {
    height: 220px;
    max-width: 360px;
    margin: 0 auto;
  }

  .dust-setup-img {
    height: 240px;
  }

  .dust-list li {
    font-size: 13.5px;
    padding: 9px 0.75rem 9px 2rem;
  }

  .dust-hero-badges {
    gap: 8px;
  }

  .dust-badge {
    font-size: 11px;
    padding: 5px 12px;
  }
}

@media (max-width: 480px) {
  .dust-hero-title { font-size: 1.35rem; }

  .dust-product-img {
    max-width: 200px;
    height: 220px;
  }

  .dust-fba-block {
    padding: 1.25rem 1rem;
  }

  .dust-setup-img {
    height: 200px;
  }
}

/* ═══════════════════════════════════════════════
   PRINT
═══════════════════════════════════════════════ */
@media print {
  .dust-hero { height: auto; background: none; }
  .dust-hero-bg, .dust-hero-overlay { display: none; }
  .dust-hero-content { color: var(--agua-navy); }
  .dust-hero-title, .dust-hero-sub { color: var(--agua-navy); }
  .dust-card { box-shadow: none; border: 1px solid #ccc; page-break-inside: avoid; }
  .dust-fba-block { box-shadow: none; border: 1px solid #ccc; }
}