/* =========================================================
   Samya Tech Use Cases — Subdomain-specific styles
   Assumes shared main-site tokens are loaded:
   --background, --foreground, --muted, --primary,
   --secondary, --primary-rgb, --secondary-rgb,
   --font-body, --font-heading, --radius-pill
   ========================================================= */

:root {
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(var(--primary-rgb), 0.14);
  --card-border-hover: rgba(var(--primary-rgb), 0.34);
  --card-shadow: 0 14px 35px rgba(82, 49, 19, 0.08);
  --card-shadow-hover: 0 22px 48px rgba(82, 49, 19, 0.15);
  --transition: 180ms ease;
}


/* Base */

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-body);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: min(75rem, calc(100% - 2.5rem));
  margin-inline: auto;
}


/* Shared background art */

.animated-grid,
.noise-overlay,
.hero-orb {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.animated-grid {
  background-image:
    linear-gradient(rgba(var(--primary-rgb), 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--primary-rgb), 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
}

.noise-overlay {
  opacity: 0.035;
  background-image: radial-gradient(
    circle,
    rgba(var(--primary-rgb), 0.2) 1px,
    transparent 1px
  );
  background-size: 4px 4px;
}

.hero-orb {
  inset: auto;
  border-radius: 50%;
  filter: blur(120px);
}

.orb-1 {
  top: -14rem;
  left: -12rem;
  width: 32rem;
  height: 32rem;
  background: rgba(var(--primary-rgb), 0.09);
}

.orb-2 {
  top: 25%;
  right: -12rem;
  width: 28rem;
  height: 28rem;
  background: rgba(var(--secondary-rgb), 0.08);
}


/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 5rem;
  background: rgba(253, 250, 245, 0.88);
  border-bottom: 1px solid rgba(var(--primary-rgb), 0.12);
  backdrop-filter: blur(20px);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand,
.footer-brand {
  display: inline-flex;
  gap: 0.3rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand {
  font-size: 1.05rem;
}

.brand-name {
  color: var(--foreground);
}

.brand-tech {
  color: var(--primary);
}

.main-nav {
  display: flex;
  gap: 1.875rem;
}

.main-nav a {
  position: relative;
  color: var(--muted);
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  transition: color var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.45rem;
  left: 0;
  height: 2px;
  background: var(--primary);
  border-radius: var(--radius-pill);
}


/* Compact introduction */

.hero {
  position: relative;
  padding: 4.5rem 0 2.5rem;
}

.hero .container {
  max-width: 75rem;
}

.eyebrow,
.section-label {
  display: block;
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: 0.9rem;
}

.hero h1 {
  max-width: 52rem;
  margin: 0;
  color: var(--foreground);
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.hero-description {
  max-width: 46rem;
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}


/* Search and filters */

.usecase-toolbar {
  padding: 1.5rem 0 3.5rem;
}

.search-wrapper {
  position: relative;
  max-width: 46rem;
}

.search-icon {
  position: absolute;
  top: 50%;
  left: 1.15rem;
  width: 1.15rem;
  height: 1.15rem;
  transform: translateY(-50%);
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.8;
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 3.6rem;
  padding: 0 3.2rem;
  color: var(--foreground);
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--card-border);
  border-radius: 0.85rem;
  outline: none;
  box-shadow: 0 8px 22px rgba(82, 49, 19, 0.05);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input::placeholder {
  color: var(--muted);
}

.search-input:focus {
  border-color: rgba(var(--primary-rgb), 0.5);
  box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.1);
}

.clear-search {
  position: absolute;
  top: 50%;
  right: 0.8rem;
  width: 2rem;
  height: 2rem;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  line-height: 1;
}

.clear-search:hover {
  color: var(--foreground);
  background: rgba(var(--primary-rgb), 0.1);
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.category-filter {
  min-height: 2.25rem;
  padding: 0.4rem 0.85rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.76rem;
  font-weight: 600;
  transition: all var(--transition);
}

.category-filter:hover {
  color: var(--primary);
  border-color: var(--card-border-hover);
}

.category-filter.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}


/* Use-case section */

.usecases-section {
  padding: 0 0 6rem;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--card-border);
}

.section-label {
  margin-bottom: 0.45rem;
}

.section-heading h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.usecase-count {
  color: var(--muted);
  font-size: 0.88rem;
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}


/* Use-case cards */

.usecase-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 17.5rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 1.1rem;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition:
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.usecase-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--primary),
    var(--secondary),
    transparent
  );
  opacity: 0;
  transition: opacity var(--transition);
}

.usecase-card:hover {
  transform: translateY(-0.3rem);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.usecase-card:hover::before {
  opacity: 1;
}

.usecase-card-link {
  position: absolute;
  z-index: 2;
  inset: 0;
}

.usecase-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.usecase-category {
  padding: 0.3rem 0.65rem;
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.09);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.usecase-arrow {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.07);
  border: 1px solid rgba(var(--primary-rgb), 0.16);
  border-radius: 50%;
  transition: all var(--transition);
}

.usecase-arrow svg {
  width: 0.85rem;
  height: 0.85rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.usecase-card:hover .usecase-arrow {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translate(0.15rem, -0.15rem);
}

.usecase-card h3 {
  margin: 0 0 0.7rem;
  color: var(--foreground);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.usecase-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.usecase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 1.4rem;
}

.usecase-tag {
  padding: 0.25rem 0.48rem;
  color: var(--muted);
  border: 1px solid rgba(var(--primary-rgb), 0.1);
  border-radius: 0.3rem;
  font-size: 0.67rem;
}


/* Empty state and footer */

.no-results {
  padding: 4rem 1.25rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.35);
  border: 1px dashed var(--card-border);
  border-radius: 1.1rem;
}

.no-results-icon {
  margin-bottom: 1rem;
  color: var(--primary);
  font-size: 2rem;
}

.no-results h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
}

.no-results p {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.btn-secondary {
  padding: 0.65rem 1rem;
  color: #fff;
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--card-border);
  background: rgba(253, 250, 245, 0.72);
}

.footer-inner {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  font-size: 0.82rem;
}

.footer-text {
  color: var(--muted);
  font-size: 0.78rem;
}


/* Responsive */

@media (max-width: 900px) {
  .usecase-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 1.75rem, 75rem);
  }

  .site-header {
    height: 4.25rem;
  }

  .main-nav {
    gap: 1rem;
  }

  .main-nav a {
    font-size: 0.78rem;
  }

  .hero {
    padding: 3.5rem 0 1.5rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .usecase-toolbar {
    padding-bottom: 2.5rem;
  }

  .usecase-grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    min-height: 5rem;
  }
}

@media (max-width: 420px) {
  .main-nav a:first-child {
    display: none;
  }

  .brand {
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }
}