/* ============================================
   BH Intelligence — Main Landing Page
   Dark-first design matching existing subdomains
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'DM Sans', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

/* --- Color Palette (Dark-first, matching existing BH subdomains) --- */
[data-theme="dark"] {
  --color-bg: #0a0a0f;
  --color-surface: #111118;
  --color-surface-2: #161620;
  --color-surface-offset: #1a1a25;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  --color-divider: rgba(255, 255, 255, 0.06);

  --color-text: #ededef;
  --color-text-muted: #9ca3af;
  --color-text-faint: #6b7280;

  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-active: #1d4ed8;

  --color-cyan: #0ea5e9;
  --color-cyan-hover: #0284c7;

  --color-purple: #8b5cf6;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: rgba(59, 130, 246, 0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }

a, button, [role="button"] {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              opacity var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-icon {
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 400;
  position: relative;
}

.nav-link:hover {
  color: var(--color-text);
}

.mobile-menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}

.nav-mobile {
  display: none;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--space-16) var(--space-6);
}

.hero-bg-orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--color-cyan);
  top: -10%;
  right: -5%;
  animation: orbFloat1 20s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: var(--color-primary);
  bottom: -5%;
  left: -5%;
  animation: orbFloat2 25s ease-in-out infinite;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: var(--color-purple);
  top: 50%;
  left: 40%;
  opacity: 0.08;
  animation: orbFloat3 18s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-40px, 30px); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -40px); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-20px, -20px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-cyan);
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-8);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  flex-shrink: 0;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

.btn-arrow {
  transition: transform var(--transition-interactive);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* --- Sections --- */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section-alt {
  background: var(--color-surface);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

/* --- Product Cards --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.product-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
  /* Fade-in animation */
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease,
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.product-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.product-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.product-card-upcoming {
  opacity: 0;
}
.product-card-upcoming.is-visible {
  opacity: 0.7;
}
.product-card-upcoming:hover {
  opacity: 0.85;
}

.product-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.product-icon-cyan {
  background: rgba(14, 165, 233, 0.12);
  color: var(--color-cyan);
}

.product-icon-blue {
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-primary);
}

.product-icon-purple {
  background: rgba(139, 92, 246, 0.12);
  color: var(--color-purple);
}

.product-badge {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.product-badge-live {
  background: rgba(34, 197, 94, 0.12);
  color: #22c55e;
}

.product-badge-soon {
  background: rgba(139, 92, 246, 0.12);
  color: var(--color-purple);
}

.product-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.product-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  line-height: 1.6;
}

.product-features {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: auto;
  padding-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.product-features li::before {
  content: '✓ ';
  color: var(--color-cyan);
  font-weight: 600;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
}

.product-link:hover {
  color: var(--color-cyan);
}

.product-link-muted {
  color: var(--color-text-faint);
}

.link-arrow {
  transition: transform var(--transition-interactive);
}

.product-link:hover .link-arrow {
  transform: translateX(3px);
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-16);
  align-items: start;
  max-width: 760px;
}

.about-content {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.about-content.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.about-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
  line-height: 1.7;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.stat-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stat-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.stat-card:nth-child(2) { transition-delay: 0.1s; }
.stat-card:nth-child(3) { transition-delay: 0.2s; }

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-cyan);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.stat-detail {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* --- API Grid --- */
.api-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.api-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease,
              border-color var(--transition-interactive);
}

.api-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.api-card:nth-child(2) { transition-delay: 0.05s; }
.api-card:nth-child(3) { transition-delay: 0.1s; }
.api-card:nth-child(4) { transition-delay: 0.15s; }

.api-card:hover {
  border-color: var(--color-border-hover);
}

.api-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.api-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.api-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Contact --- */
.contact-block {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.contact-block.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-actions {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.contact-email {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-10) 0;
  background: var(--color-bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  align-items: center;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-brand-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.footer-links {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer-attribution:hover {
  color: var(--color-text-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: 1fr 1fr;
  }
  .api-grid {
    grid-template-columns: 1fr 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .nav-mobile {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding-inline: var(--space-6);
    background: var(--color-bg);
  }
  .nav-mobile.is-open {
    display: block;
    max-height: 300px;
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-link-mobile {
    display: block;
    padding: var(--space-3) 0;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 1px solid var(--color-divider);
  }
  .nav-link-mobile:last-child {
    border-bottom: none;
  }
  .nav-link-mobile:hover {
    color: var(--color-text);
  }

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

  .hero {
    min-height: 70vh;
    padding: var(--space-12) var(--space-4);
  }

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

  .footer-links {
    gap: var(--space-5);
  }
}