/* ============================================
   Solutions Page — Industry-themed cards
   Extends design tokens from variables.css
   ============================================ */

/* Local extension: industry accent colors.
   Each industry gets a unique hue anchored to the brand palette. */
:root {
  --industry-solar: #f59e0b;
  --industry-solar-soft: #fef3c7;
  --industry-automotive: #ef4444;
  --industry-automotive-soft: #fee2e2;
  --industry-electronics: #1a73e8;
  --industry-electronics-soft: #e8f0fe;
  --industry-packaging: #10b981;
  --industry-packaging-soft: #d1fae5;
  --industry-new_energy: #00b4d8;
  --industry-new_energy-soft: #cffafe;
}


/* =====================
   Hero
   ===================== */
.solutions-hero {
  position: relative;
  padding: calc(var(--space-xl, 48px) + 30px) 0 var(--space-xl, 48px);
  background: linear-gradient(135deg, #0f2942 0%, #1a3a5c 45%, #1a73e8 100%);
  color: var(--color-white, #ffffff);
  overflow: hidden;
  isolation: isolate;
}

.solutions-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 30%, rgba(0, 180, 216, 0.25) 0%, transparent 38%),
    radial-gradient(circle at 82% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 45%);
  z-index: -1;
}

.solutions-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
  mask-image: linear-gradient(180deg, transparent 0%, black 30%, black 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, black 30%, black 70%, transparent 100%);
  z-index: -1;
}

.solutions-hero .breadcrumb {
  margin-bottom: var(--space-lg, 24px);
  color: rgba(255, 255, 255, 0.7);
}

.solutions-hero .breadcrumb-item a {
  color: rgba(255, 255, 255, 0.75);
}

.solutions-hero .breadcrumb-item a:hover {
  color: var(--color-white, #ffffff);
}

.solutions-hero .breadcrumb-item:not(:last-child)::after {
  color: rgba(255, 255, 255, 0.4);
}

.solutions-hero .breadcrumb-item.active {
  color: var(--color-white, #ffffff);
}

.solutions-hero-content {
  max-width: 760px;
  position: relative;
}

.solutions-eyebrow {
  display: inline-block;
  font-size: var(--font-size-xs, 12px);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 6px 14px;
  background-color: rgba(0, 180, 216, 0.18);
  color: var(--color-accent, #00b4d8);
  border: 1px solid rgba(0, 180, 216, 0.35);
  border-radius: var(--border-radius-full, 9999px);
  margin-bottom: var(--space-lg, 24px);
}

.solutions-hero-title {
  font-size: var(--font-size-5xl, 48px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md, 16px);
  letter-spacing: -0.02em;
}

.solutions-hero-subtitle {
  font-size: var(--font-size-lg, 18px);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.78);
  max-width: 620px;
}

@media (max-width: 768px) {
  .solutions-hero {
    padding: var(--space-xl, 48px) 0;
  }
  .solutions-hero-title {
    font-size: var(--font-size-3xl, 32px);
  }
  .solutions-hero-subtitle {
    font-size: var(--font-size-base, 16px);
  }
}


/* =====================
   Industry Tabs
   ===================== */
.solutions-tabs-section {
  background-color: var(--color-white, #ffffff);
  border-bottom: 1px solid var(--color-border, #e0e0e0);
  position: sticky;
  top: 70px;
  z-index: 50;
  backdrop-filter: blur(8px);
}

.solutions-tabs {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-md, 16px) 0;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.solutions-tabs::-webkit-scrollbar {
  height: 4px;
}

.solutions-tabs::-webkit-scrollbar-thumb {
  background-color: var(--color-border, #e0e0e0);
  border-radius: var(--border-radius-full, 9999px);
}

.solutions-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs, 4px);
  padding: 10px var(--space-lg, 24px);
  background-color: var(--color-bg-light, #f5f7fa);
  border: 1px solid transparent;
  border-radius: var(--border-radius-full, 9999px);
  font-family: inherit;
  font-size: var(--font-size-sm, 14px);
  font-weight: 600;
  color: var(--color-text, #333333);
  cursor: pointer;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: all var(--transition-normal, 0.3s ease);
}

.solutions-tab:hover {
  background-color: var(--color-primary-light, #e8f0fe);
  color: var(--color-primary, #1a73e8);
  border-color: var(--color-primary-light, #e8f0fe);
}

.solutions-tab.active {
  background-color: var(--color-header, #2b2f38);
  color: var(--color-white, #ffffff);
  border-color: var(--color-header, #2b2f38);
  box-shadow: 0 4px 14px rgba(43, 47, 56, 0.25);
}

.solutions-tab .tab-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}


/* =====================
   Solutions Grid
   ===================== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg, 24px);
}

@media (max-width: 992px) {
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .solutions-grid {
    grid-template-columns: 1fr;
  }
}


/* =====================
   Solution Card
   ===================== */
.solution-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background-color: var(--color-white, #ffffff);
  border: 1px solid var(--color-border, #e0e0e0);
  border-radius: var(--border-radius-lg, 16px);
  overflow: hidden;
  transition: transform var(--transition-normal, 0.3s ease),
    box-shadow var(--transition-normal, 0.3s ease),
    border-color var(--transition-normal, 0.3s ease);
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--color-primary, #1a73e8));
  transition: height var(--transition-normal, 0.3s ease);
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover, 0 12px 32px rgba(26, 115, 232, 0.16));
  border-color: var(--card-accent, var(--color-primary, #1a73e8));
}

.solution-card:hover::before {
  height: 6px;
}

.solution-card-highlight {
  border-color: var(--color-primary, #1a73e8);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.22), var(--shadow-hover, 0 12px 32px rgba(26, 115, 232, 0.16));
}

@media (prefers-reduced-motion: no-preference) {
  .solution-card-highlight {
    animation: solution-card-pulse 1.2s ease-out 2;
  }
}

@keyframes solution-card-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.22), var(--shadow-hover, 0 12px 32px rgba(26, 115, 232, 0.16)); }
  50% { box-shadow: 0 0 0 8px rgba(26, 115, 232, 0.10), var(--shadow-hover, 0 12px 32px rgba(26, 115, 232, 0.16)); }
}

.solution-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md, 16px);
  padding: var(--space-lg, 24px) var(--space-lg, 24px) var(--space-md, 16px);
}

.solution-icon {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-md, 8px);
  background-color: var(--card-accent-soft, var(--color-primary-light, #e8f0fe));
  color: var(--card-accent, var(--color-primary, #1a73e8));
  transition: transform var(--transition-normal, 0.3s ease);
}

.solution-card:hover .solution-icon {
  transform: scale(1.08) rotate(-3deg);
}

.solution-icon svg {
  width: 28px;
  height: 28px;
}

.solution-title-wrap {
  flex: 1 1 auto;
  min-width: 0;
}

.solution-industry-tag {
  display: inline-block;
  font-size: var(--font-size-xs, 12px);
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--card-accent, var(--color-primary, #1a73e8));
  margin-bottom: var(--space-xs, 4px);
}

.solution-title {
  font-size: var(--font-size-lg, 18px);
  font-weight: 700;
  color: var(--color-dark, #1a1a2e);
  line-height: 1.4;
  margin: 0;
}

.solution-card-body {
  padding: 0 var(--space-lg, 24px) var(--space-md, 16px);
  flex: 1 1 auto;
}

.solution-desc {
  font-size: var(--font-size-sm, 14px);
  line-height: 1.7;
  color: var(--color-text-muted, #666666);
  margin: 0;
}

.solution-features-wrap {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow, 0.5s ease);
}

.solution-card.expanded .solution-features-wrap {
  max-height: 600px;
}

.solution-features {
  padding: 0 var(--space-lg, 24px) var(--space-md, 16px);
  border-top: 1px dashed var(--color-border, #e0e0e0);
  margin-top: var(--space-xs, 4px);
  padding-top: var(--space-md, 16px);
}

.solution-features-label {
  display: flex;
  align-items: center;
  gap: var(--space-xs, 4px);
  font-size: var(--font-size-xs, 12px);
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-dark, #1a1a2e);
  margin-bottom: var(--space-sm, 8px);
}

.solution-features-label svg {
  width: 14px;
  height: 14px;
  color: var(--card-accent, var(--color-primary, #1a73e8));
}

.solution-features-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 8px);
}

.solution-features-list li {
  position: relative;
  padding-left: 24px;
  font-size: var(--font-size-sm, 14px);
  line-height: 1.6;
  color: var(--color-text, #333333);
}

.solution-features-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: var(--border-radius-full, 9999px);
  background-color: var(--card-accent-soft, var(--color-primary-light, #e8f0fe));
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a73e8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px 10px;
}

.solution-card-footer {
  display: flex;
  justify-content: flex-end;
  padding: 0 var(--space-lg, 24px) var(--space-lg, 24px);
}

.solution-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs, 4px);
  padding: 10px 18px;
  min-height: 40px;
  background-color: transparent;
  border: 1px solid var(--color-border, #e0e0e0);
  border-radius: var(--border-radius-full, 9999px);
  font-family: inherit;
  font-size: var(--font-size-xs, 12px);
  font-weight: 600;
  color: var(--color-primary, #1a73e8);
  cursor: pointer;
  transition: all var(--transition-fast, 0.2s ease);
}

.solution-toggle:hover {
  background-color: var(--card-accent, var(--color-primary, #1a73e8));
  border-color: var(--card-accent, var(--color-primary, #1a73e8));
  color: var(--color-white, #ffffff);
}

.solution-toggle svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-normal, 0.3s ease);
}

.solution-card.expanded .solution-toggle svg {
  transform: rotate(180deg);
}


/* =====================
   Industry Color Variants
   Applied via data-industry attribute on each card
   ===================== */
.solution-card[data-industry="solar"] {
  --card-accent: var(--industry-solar);
  --card-accent-soft: var(--industry-solar-soft);
}

.solution-card[data-industry="automotive"] {
  --card-accent: var(--industry-automotive);
  --card-accent-soft: var(--industry-automotive-soft);
}

.solution-card[data-industry="electronics"] {
  --card-accent: var(--industry-electronics);
  --card-accent-soft: var(--industry-electronics-soft);
}

.solution-card[data-industry="packaging"] {
  --card-accent: var(--industry-packaging);
  --card-accent-soft: var(--industry-packaging-soft);
}

.solution-card[data-industry="new_energy"] {
  --card-accent: var(--industry-new_energy);
  --card-accent-soft: var(--industry-new_energy-soft);
}


/* =====================
   Empty State
   ===================== */
.solutions-empty {
  text-align: center;
  padding: var(--space-xxl, 80px) var(--space-lg, 24px);
  color: var(--color-text-muted, #666666);
}

.solutions-empty-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 96px;
  height: 96px;
  border-radius: var(--border-radius-full, 9999px);
  background-color: var(--color-bg-light, #f5f7fa);
  color: var(--color-text-muted, #666666);
  margin-bottom: var(--space-md, 16px);
}

.solutions-empty-text {
  font-size: var(--font-size-lg, 18px);
  font-weight: 600;
  margin: 0;
}



/* =====================
   Animations — entry stagger
   ===================== */
@keyframes solutionCardIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.solution-card {
  animation: solutionCardIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

.solution-card:nth-child(1) { animation-delay: 0.05s; }
.solution-card:nth-child(2) { animation-delay: 0.12s; }
.solution-card:nth-child(3) { animation-delay: 0.19s; }
.solution-card:nth-child(4) { animation-delay: 0.26s; }
.solution-card:nth-child(5) { animation-delay: 0.33s; }
.solution-card:nth-child(6) { animation-delay: 0.40s; }