/* ==========================================================================
   DigiThings Design System — Component primitives
   --------------------------------------------------------------------------
   All values derive from tokens.css. Do not introduce raw hex values here.
   Primitives: .nav, .hero, .module-card, .feature-grid, .terminal,
   .chat-embed-slot, .footer — plus supporting blocks used by website/.
   ========================================================================== */

/* --- Reset --------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  background-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  overflow-x: hidden;
  background-color: transparent;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-overflow-scrolling: touch;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-base);
}

/* --- Typography ---------------------------------------------------------- */
h1 {
  font-size: var(--font-size-h1);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent-color);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--accent-color);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--font-size-section-title);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-7);
  text-align: center;
}

p {
  color: var(--text-secondary);
  font-size: var(--font-size-body);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

p:last-child {
  margin-bottom: 0;
}

/* --- .nav ---------------------------------------------------------------- */
.nav,
.navbar {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-base);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img { display: none; }

.logo-svg {
  height: 28px;
  width: auto;
}

.logo-text {
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-small);
  transition: color 0.15s ease;
}

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

/* --- .hero --------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0;
  text-align: left;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-7);
}

.hero-text {
  flex: 1;
  max-width: 600px;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

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

.hero-logo-img { display: none; }

.hero-logo-svg {
  height: 5rem;
  width: auto;
}

.hero-subtitle {
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}

.description {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  max-width: 500px;
}

.hero-divider {
  margin-top: var(--space-6);
  height: 1px;
  background-color: var(--border-color);
  width: 100%;
}

/* --- .feature-grid (content-grid / info-block) --------------------------- */
.ecosystem-section {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-9) 0;
}

.feature-grid,
.content-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-7);
}

.content-grid.top-grid { padding: var(--space-5) 0; }
.content-grid.bottom-grid { padding: var(--space-9) 0; }

.info-block {
  padding: var(--space-5);
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  background-color: transparent;
  transition: transform 0.3s var(--transition-ease),
              background-color 0.3s ease,
              border-color 0.3s ease,
              box-shadow 0.3s ease;
}

.info-block:hover {
  transform: translateY(-4px);
  background-color: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* --- .module-card (per-module scoped card) ------------------------------- */
.module-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.02);
  transition: transform 0.3s var(--transition-ease),
              border-color 0.3s ease,
              box-shadow 0.3s ease;
  border-left: 3px solid var(--accent);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-decoration: none;
  color: inherit;
}

.module-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.module-card h3 {
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.module-card p {
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.module-card-link {
  color: var(--accent);
  font-size: var(--font-size-small);
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-top: var(--space-3);
  transition: transform 0.2s ease;
}

.module-card:hover .module-card-link {
  transform: translateX(2px);
}

/* --- .module-grid (10-up ecosystem overview) ----------------------------- */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* --- .module-section (per-module deep-dive) ------------------------------ */
.module-section {
  padding: var(--space-8) 0 var(--space-7);
  scroll-margin-top: var(--space-7);
  border-top: 1px solid var(--border-color);
}

.module-section h2 {
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.module-section > p {
  max-width: 720px;
  margin-bottom: var(--space-5);
}

.module-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
  max-width: 820px;
}

.module-features li {
  position: relative;
  padding-left: var(--space-4);
  color: var(--text-secondary);
  font-size: var(--font-size-body);
  line-height: 1.6;
}

.module-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.module-features code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.module-family-tag {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  margin-right: 0.25em;
}

/* --- .section-lede ------------------------------------------------------- */
.section-lede {
  max-width: 720px;
  margin: 0 auto var(--space-5);
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--font-size-body);
  line-height: 1.6;
}

/* --- .hero-cta ----------------------------------------------------------- */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-small);
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.hero-cta:hover {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  transform: translateY(-1px);
}

.hero-cta-ghost {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.hero-cta-ghost:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.hero-cta-arrow {
  transition: transform 0.2s ease;
}

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

/* --- .prompt-chips (sample prompts above chat embed) --------------------- */
.prompt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-4);
}

.prompt-chip {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.prompt-chip:hover,
.prompt-chip:focus-visible {
  border-color: var(--accent);
  color: var(--text-primary);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  outline: none;
}

/* --- .try-section / .open-core-section layout --------------------------- */
.try-section,
.open-core-section {
  padding: var(--space-8) 0;
}

.try-section .chat-embed-slot {
  max-width: 960px;
  margin: 0 auto;
  min-height: 520px;
}

.try-section .chat-embed-slot > iframe {
  min-height: 520px;
}

.open-core-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-5);
}

/* --- Footer links ------------------------------------------------------- */
.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  justify-content: center;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-small);
  transition: color 0.2s ease;
}

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

/* --- .terminal ----------------------------------------------------------- */
.terminal,
.terminal-window {
  width: 100%;
  max-width: 550px;
  background: rgba(10, 10, 10, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.8),
              inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  overflow: hidden;
  font-family: var(--font-family-mono);
}

.terminal-header {
  padding: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.terminal-header .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red    { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green  { background: #27c93f; }

.terminal-title {
  margin-left: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
}

.terminal-body {
  padding: 20px;
  font-size: 0.9rem;
  color: var(--text-primary);
  min-height: 200px;
  line-height: 1.5;
}

.cursor {
  display: inline-block;
  width: 8px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* --- .chat-embed-slot ---------------------------------------------------- */
/*
 * Drop-in container where a DigiChat iframe / web-component can be mounted.
 * Page-level layouts decide sizing via surrounding flex/grid; this rule
 * just ensures the slot has a presentable frame and accent outline.
 */
.chat-embed-slot {
  width: 100%;
  min-height: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

.chat-embed-slot::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.6;
}

.chat-embed-slot > iframe {
  width: 100%;
  height: 100%;
  min-height: 400px;
  border: 0;
  display: block;
}

/* --- Timeline (used by existing flow section) --------------------------- */
.architecture-timeline {
  padding: var(--space-9) var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.timeline-container {
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: var(--space-7) auto;
  padding-left: 40px;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40px;
  width: 2px;
  background: var(--border-color);
  z-index: 1;
}

.timeline-event {
  display: flex;
  align-items: flex-start;
  width: 100%;
  position: relative;
  margin-bottom: var(--space-6);
  padding-left: 40px;
}

.timeline-dot {
  position: absolute;
  left: -7px;
  top: 1.2rem;
  width: 16px;
  height: 16px;
  background-color: var(--bg-primary);
  border: 2px solid var(--text-secondary);
  border-radius: 50%;
  z-index: 2;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
}

.timeline-event.active .timeline-dot {
  background-color: var(--fg);
  border-color: var(--fg);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.6),
              0 0 40px rgba(255, 255, 255, 0.2);
  transform: scale(1.3);
}

.timeline-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.timeline-content.alt-side { text-align: left; }

.feature-card {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card > p {
  overflow: hidden;
  padding: 0;
  margin: 0;
}

.timeline-event.active .feature-card {
  grid-template-rows: 1fr;
  opacity: 1;
}

.timeline-event.active .feature-card > p {
  padding: var(--space-4) var(--space-5);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  backdrop-filter: blur(10px);
}

/* --- Flow node ----------------------------------------------------------- */
.flow-node {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-family: var(--font-family-mono);
  font-size: 1.1rem;
  font-weight: bold;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  display: inline-block;
  backdrop-filter: blur(5px);
  transition: border-color 0.4s, box-shadow 0.4s;
}

.timeline-event.active .flow-node {
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.05);
}

.node-sub {
  font-family: var(--font-family);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: normal;
  display: block;
  margin-top: 0.2rem;
}

.flow-node.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 20px color-mix(in srgb, var(--accent) 25%, transparent);
}

/* --- Architecture flow --------------------------------------------------- */
.architecture-flow {
  padding: var(--space-7) 0;
  text-align: center;
}

.flow-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.flow-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.flow-connector .line {
  width: 2px;
  height: 30px;
  background: rgba(255, 255, 255, 0.2);
}

.flow-connector .arrow {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid rgba(255, 255, 255, 0.2);
}

/* --- Bento grid ---------------------------------------------------------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-4);
  max-width: 1000px;
  margin: var(--space-8) auto var(--space-9) auto;
  padding: 0 var(--space-5);
}

.bento-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-speed) var(--transition-ease),
              border-color var(--transition-speed);
}

.bento-item:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.2);
}

.bento-item h2 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--space-3);
  font-weight: 500;
  letter-spacing: -0.5px;
}

.bento-item p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.bento-item.wide {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(25, 25, 25, 0.8) 100%);
}

.bento-item.tall {
  grid-row: span 2;
  justify-content: flex-start;
}

.bento-visual {
  height: 120px;
  margin: var(--space-3) 0;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-icon {
  width: 40px;
  height: 40px;
  border: 4px solid var(--text-secondary);
  border-radius: 4px 4px 20px 20px;
  opacity: 0.6;
}

.bento-item.dark-box {
  background: #000000;
  border-color: #333;
}

/* --- Starfield canvas base ---------------------------------------------- */
#bg-base {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background-color: #000000;
  pointer-events: none;
}

#network-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

/* --- Scroll-trigger ------------------------------------------------------ */
.scroll-trigger {
  --scroll: 0;
  opacity: calc(var(--scroll) * 1.5);
  transition: opacity 0.2s ease-out, transform 0.2s ease-out, filter 0.2s ease-out;
  transform: translateY(calc((1 - var(--scroll)) * 80px));
}

.scroll-trigger[data-direction="bottom"] {
  transform: translateY(calc((1 - var(--scroll)) * 80px));
}

.scroll-trigger[data-direction="left"] {
  transform: translateX(calc((var(--scroll) - 1) * 80px));
}

.scroll-trigger[data-direction="right"] {
  transform: translateX(calc((1 - var(--scroll)) * 80px));
}

.scroll-trigger[data-direction="zoom"] {
  transform: scale(calc(1 + (1 - var(--scroll)) * 0.1)) translateY(calc((1 - var(--scroll)) * 40px));
  filter: blur(calc((1 - var(--scroll)) * 10px));
}

@media (prefers-reduced-motion: reduce) {
  .scroll-trigger {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* --- .footer ------------------------------------------------------------- */
.footer {
  margin-top: var(--space-9);
  padding: var(--space-7) 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer p {
  font-size: var(--font-size-xs);
  color: #666;
}

/* --- Mobile -------------------------------------------------------------- */
@media (max-width: 768px) {
  h2 { font-size: 1.8rem; }
  p { font-size: 1.05rem; }

  .container { padding: 0 1rem; }
  .nav-container { padding: 0.875rem 1rem; }

  .hero {
    min-height: 100svh;
    padding: var(--space-7) 0 var(--space-5);
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-5);
  }

  .hero-text {
    align-items: center;
    display: flex;
    flex-direction: column;
    max-width: 100%;
  }

  .hero-visual {
    justify-content: center;
    width: 100%;
  }

  .logo-title { justify-content: center; }
  .hero-logo-svg { height: 3.5rem; }
  .hero-subtitle { font-size: 1.25rem; }

  .description {
    max-width: 100%;
    text-align: center;
    font-size: 1rem;
  }

  .terminal-window,
  .terminal { max-width: 100%; }

  .section-title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }

  .architecture-timeline {
    padding: var(--space-7) 1rem;
  }

  .timeline-container {
    margin: var(--space-5) auto;
    padding-left: 30px;
  }

  .timeline-line { left: 30px; }

  .timeline-event {
    padding-left: 30px;
    margin-bottom: var(--space-5);
  }

  .bento-grid {
    grid-template-columns: 1fr;
    margin: var(--space-6) auto var(--space-7);
    padding: 0 1rem;
    gap: 1rem;
  }

  .bento-item.wide { grid-column: span 1; }
  .bento-item.tall { grid-row: span 1; }
  .bento-item { padding: 1.75rem; }

  .feature-grid,
  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .info-block { padding: var(--space-4); }

  .module-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .module-section {
    padding: var(--space-6) 0 var(--space-5);
  }

  .try-section,
  .open-core-section {
    padding: var(--space-6) 0;
  }

  .try-section .chat-embed-slot,
  .try-section .chat-embed-slot > iframe {
    min-height: 420px;
  }

  .hero-actions {
    justify-content: center;
  }

  .footer {
    margin-top: var(--space-7);
    padding: 2.5rem 0;
  }
}

@media (max-width: 480px) {
  h1 { font-size: clamp(2.5rem, 10vw, 3.5rem); }
  h2 { font-size: 1.5rem; }

  .section-title { font-size: 1.75rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .bento-item { padding: 1.25rem; }

  .terminal-body {
    font-size: 0.78rem;
    padding: 14px;
    min-height: 160px;
  }

  .flow-node {
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
  }

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

  .module-card { padding: var(--space-4); }

  .try-section .chat-embed-slot,
  .try-section .chat-embed-slot > iframe {
    min-height: 380px;
  }

  .hero-cta { padding: 0.6rem 1rem; }
}