/* ==========================================================================
   Zolltor Marketing Site Stylesheet
   Design system aligned with ZTI app:
     - Primary: teal-700 (#0f766e) / teal-800 (#115e59)
     - Headings: Libre Baskerville (serif)
     - Body: Source Sans Pro (sans-serif)
     - Border radius: 3px
     - Background: gray-50 (#f9fafb)
   ========================================================================== */

/* ---------- Fonts ---------- */
@import url("/css/fonts.css");

/* ---------- Custom Properties (Design Tokens) ---------- */
:root {
  /* Primary palette – teal */
  --color-primary-50:  #f0fdfa;
  --color-primary-100: #ccfbf1;
  --color-primary-200: #99f6e4;
  --color-primary-300: #5eead4;
  --color-primary-400: #2dd4bf;
  --color-primary-500: #14b8a6;
  --color-primary-600: #0d9488;
  --color-primary-700: #0f766e;
  --color-primary-800: #115e59;
  --color-primary-900: #134e4a;

  /* Neutrals – Tailwind gray */
  --color-gray-50:  #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Accent – amber for highlights */
  --color-accent-400: #fbbf24;
  --color-accent-500: #f59e0b;

  /* Semantic */
  --color-bg:      var(--color-gray-50);
  --color-surface:  #ffffff;
  --color-text:     var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-500);
  --color-border:   var(--color-gray-200);

  /* Typography */
  --font-heading: "Libre Baskerville", Georgia, serif;
  --font-body:    "Source Sans Pro", "Segoe UI", sans-serif;

  /* Spacing */
  --section-padding: 5rem 0;
  --container-max: 1200px;
  --card-radius: 3px;

  /* Shadows */
  --shadow-sm:  0 1px 2px rgba(0,0,0,.05);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);
  --shadow-xl:  0 20px 25px -5px rgba(0,0,0,.08), 0 8px 10px -6px rgba(0,0,0,.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-gray-900);
}

a {
  color: var(--color-primary-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-800);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

strong {
  font-weight: 600;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav-brand a {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-brand img {
  height: 36px;
  width: auto;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-800);
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-gray-600);
  padding: 0.5rem 0.875rem;
  border-radius: var(--card-radius);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary-700);
  background: var(--color-primary-50);
}

.nav-link.active {
  color: var(--color-primary-700);
  font-weight: 600;
}

/* ---- Home page: large transparent logo + shrink-on-scroll ---- */

/* On non-home pages, hide the hero variant logo */
.brand-hero { display: none; }
.brand-compact { display: block; }

/* On the home page, show the transparent logo large, hide the compact one */
body.home .brand-hero {
  display: block;
  height: 160px;
  width: auto;
  transition: height 0.35s ease, opacity 0.35s ease;
}

body.home .brand-compact {
  display: none;
}

/* Navbar starts transparent over the hero image */
body.home .navbar {
  position: fixed;
  left: 0;
  right: 0;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
  transition: background 0.35s ease, border-color 0.35s ease;
}

/* Taller navbar to fit the large logo */
body.home .navbar .container {
  height: 11rem;
  transition: height 0.35s ease;
}

/* Push hero content below the tall fixed navbar */
body.home .hero {
  padding-top: 13rem;
}

/* ---- Scrolled: compact solid navbar with white-bg logo ---- */
body.home .navbar.scrolled {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
}

body.home .navbar.scrolled .container {
  height: 5rem;
}

/* Swap logos: hide transparent, show compact */
body.home .navbar.scrolled .brand-hero {
  display: none;
}

body.home .navbar.scrolled .brand-compact {
  display: block;
  height: 72px;
  width: auto;
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary-700);
  border: none;
  border-radius: var(--card-radius);
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--color-primary-800);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  background: var(--color-primary-900);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary-700);
  background: #fff;
  border: 1.5px solid var(--color-primary-700);
  border-radius: var(--card-radius);
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-800);
  color: var(--color-primary-800);
}
.btn-tradebuzz {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: #2dd4bf;
  background: #0f172a;
  border: 1.5px solid #2dd4bf;
  border-radius: var(--card-radius);
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-tradebuzz:hover {
  background: #1e293b;
  color: #5eead4;
  border-color: #5eead4;
}

.btn-large {
  padding: 0.75rem 2rem;
  font-size: 16px;
}

.btn-product {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary-700);
  transition: all var(--transition-fast);
  margin-top: auto;
}

.btn-product:hover {
  color: var(--color-primary-800);
  gap: 0.25rem;
}

/* ---------- Section Primitives ---------- */
.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 0.75rem;
  color: var(--color-gray-900);
}

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* ---------- Hero Section ---------- */
.hero {
  padding: 6rem 0 5rem;
  background:
    linear-gradient(170deg, var(--color-primary-50) 0%, var(--color-bg) 60%);
  position: relative;
  overflow: hidden;
}

/* Home page hero: back.jpg behind the gradient overlay */
body.home .hero {
  background: url('/images/back.jpg') center center / cover no-repeat;
}

body.home .hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

/* subtle decorative circles */
.hero::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-100) 0%, transparent 70%);
  top: -200px;
  right: -150px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-content {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin-bottom: 1.25rem;
  color: var(--color-gray-900);
  letter-spacing: -0.01em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-primary-600);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ---------- Products Overview ---------- */
.products-overview {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2.25rem 2rem;
  transition: all var(--transition-base);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
  transform: translateY(-2px);
}

.product-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--card-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.product-icon.zti-icon {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.product-icon.buzz-icon {
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.25), rgba(8, 145, 178, 0.15));
    border: 1px solid rgba(45, 212, 191, 0.3);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.1);
}

/* ---- Trade Buzz: dark product card (matches app theme) ---- */
.product-card.buzz-dark-card {
    background: #0f172a;
    border-color: rgba(45, 212, 191, 0.15);
}

.product-card.buzz-dark-card:hover {
    border-color: rgba(45, 212, 191, 0.35);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 0 15px rgba(20, 184, 166, 0.08);
}

.product-card.buzz-dark-card .product-name {
    color: #5eead4;
}

.product-card.buzz-dark-card .product-tagline {
    color: #cbd5e1;
}

.product-card.buzz-dark-card .product-description {
    color: #94a3b8;
}

.product-card.buzz-dark-card .product-features li {
    color: #94a3b8;
}

.product-card.buzz-dark-card .product-features li::before {
    background: #14b8a6;
}

.product-card.buzz-dark-card .btn-product {
    color: #2dd4bf;
}

.product-card.buzz-dark-card .btn-product:hover {
    color: #5eead4;
}

.product-name {
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.product-tagline {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary-600);
  margin-bottom: 0.75rem;
}

.product-description {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.product-features {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.product-features li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.product-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary-500);
}

/* ---------- Value Props ---------- */
.value-props {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.props-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.prop-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.prop-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.prop-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.prop-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---------- Use Cases ---------- */
.use-cases {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.case-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 1.75rem;
  transition: all var(--transition-base);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-200);
}

.case-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.case-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---------- CTA Section ---------- */
.cta-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--color-primary-800) 0%, var(--color-primary-700) 100%);
  text-align: center;
  color: #fff;
}

.cta-section h2 {
  font-size: 1.75rem;
  color: #fff;
  margin-bottom: 0.75rem;
}

.cta-section p {
  font-size: 1.1rem;
  color: var(--color-primary-100);
  margin-bottom: 1.75rem;
}

.cta-section .btn-primary {
  background: #fff;
  color: var(--color-primary-800);
  font-weight: 700;
}

.cta-section .btn-primary:hover {
  background: var(--color-primary-50);
  box-shadow: var(--shadow-lg);
}

/* ---------- About Section ---------- */
.about-section {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.about-content {
  max-width: 720px;
  margin: 1.5rem auto 0;
}

.about-content p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* ---------- Contact Section ---------- */
.contact-section {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 800px;
  margin: 2rem auto 0;
}

.contact-info h3,
.contact-form h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.contact-item {
  margin-bottom: 0.75rem;
  color: var(--color-text-secondary);
}

.contact-item a {
  color: var(--color-primary-700);
  font-weight: 500;
}

.contact-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

.contact-form p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: 3.5rem 0 0;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-gray-800);
}

.footer-brand .logo {
  color: #fff;
  font-size: 1.35rem;
}

.footer-brand img {
  height: 48px;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-gray-400);
  margin-top: 0.35rem;
}

.footer-links {
  display: flex;
  gap: 3rem;
  justify-content: flex-end;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-column h4 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.footer-column a {
  font-size: 0.9rem;
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding: 1.25rem 0;
  font-size: 0.8rem;
  color: var(--color-gray-400);
}

/* ==========================================================================
   Product Pages (ZTI + Trade Buzz)
   ========================================================================== */

/* ---------- Product Hero ---------- */
.product-hero {
  padding: 5.5rem 0 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.product-hero.zti-hero {
  background: linear-gradient(170deg, var(--color-primary-50) 0%, var(--color-bg) 55%);
}

.product-hero.buzz-hero {
  background: linear-gradient(170deg, #fef9ee 0%, var(--color-bg) 55%);
}

.product-hero-content {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.product-badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  border: 1px solid var(--color-primary-200);
}

.product-badge.buzz-badge {
  background: #fef3c7;
  color: #92400e;
  border-color: #fde68a;
}

.product-hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 1rem;
}

.product-hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.product-hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* ---------- Problem Section ---------- */
.problem-section {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.problem-text {
  max-width: 720px;
  margin: 1.5rem auto 3rem;
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.problem-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  max-width: 700px;
  margin: 0 auto;
}

.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary-700);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ---------- Features Section ---------- */
.features-section {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem 1.75rem;
  transition: all var(--transition-base);
  position: relative;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
  transform: translateY(-2px);
}

/* Trade Buzz feature card accent */
.feature-card.buzz-card {
  border-top: 3px solid var(--color-accent-500);
}

.feature-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-700);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-icon.buzz-icon {
  /* emoji icons – no extra styling needed */
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.feature-insight {
  margin-top: 1rem;
  padding: 0.875rem 1rem;
  background: var(--color-primary-50);
  border-left: 3px solid var(--color-primary-500);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  font-size: 0.875rem;
  color: var(--color-gray-700);
  line-height: 1.6;
}

/* ---------- Detailed Features ---------- */
.detailed-features {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.feature-detail {
  max-width: 740px;
  margin: 0 auto 3.5rem;
}

.feature-detail:last-child {
  margin-bottom: 0;
}

.feature-detail-content h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.feature-detail-content p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.detail-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.detail-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-primary-600);
  font-weight: 700;
}

/* ---------- Data Sources ---------- */
.data-sources {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.source-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem 1.75rem;
}

.source-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.source-type {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary-600);
  margin-bottom: 1rem;
}

.source-examples {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.source-examples li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.source-examples li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-400);
}

/* ---------- Use Cases Detailed ---------- */
.use-cases-detailed {
  padding: var(--section-padding);
  background: var(--color-surface);
}

/* Applications grid (Trade Buzz) */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.application-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem 1.75rem;
  transition: all var(--transition-base);
}

.application-card:hover {
  box-shadow: var(--shadow-md);
}

.app-number {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-300);
  margin-bottom: 0.75rem;
}

.application-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.application-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* Roles grid (ZTI) */
.roles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.role-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem 1.75rem;
  transition: all var(--transition-base);
}

.role-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-200);
}

.role-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.role-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.role-focus {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary-600);
  margin-bottom: 1rem;
}

.role-example {
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  font-size: 0.9rem;
  line-height: 1.6;
}

.role-example strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.role-example p {
  color: var(--color-text-secondary);
}

/* ---------- Metrics Section ---------- */
.metrics-section {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.metric-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 1.75rem;
}

.metric-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-800);
}

.metric-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ---------- Integration Section ---------- */
.integration-section {
  padding: var(--section-padding);
  background: var(--color-surface);
}

.integration-text {
  max-width: 680px;
  margin: 1rem auto 2.5rem;
  text-align: center;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.integration-features {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.integration-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.check-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}

/* ---------- Pricing ---------- */
.pricing-preview {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  max-width: 900px;
  margin: 2rem auto 0;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 2rem 1.75rem;
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary-700);
  box-shadow: var(--shadow-lg);
}

.popular-badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary-700);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.875rem;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.price {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 1.25rem;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.pricing-features li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.pricing-features li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-primary-600);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem 0;
  }

  .nav-menu {
    display: none; /* TODO: hamburger menu JS toggle */
  }

  .hero {
    padding: 4rem 0 3.5rem;
  }

  body.home .hero {
    padding-top: 9rem;
  }

  body.home .navbar .container {
    height: 7rem;
  }

  body.home .brand-hero {
    height: 100px;
  }

  body.home .navbar.scrolled .container {
    height: 4rem;
  }

  body.home .navbar.scrolled .brand-compact {
    height: 48px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-links {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
  }

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

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

  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .product-hero-cta {
    flex-direction: column;
    align-items: center;
  }

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