/* ==========================================
   QRUCIBLE v3.0 — Cover Page Styles
   FORGE Dark Engineering Aesthetic
   ========================================== */

/* -- Design Tokens -- */
:root {
  --bg-primary: #13141a;
  --bg-secondary: #1a1b23;
  --bg-tertiary: #232529;
  --text-primary: #F9FAFB;
  --text-secondary: #D1D5DB;
  --text-tertiary: #9CA3AF;
  --accent-cyan: #00B4D8;
  --accent-purple: #A855F7;
  --accent-green: #22C55E;
  --accent-orange: #F97316;
  --accent-pink: #EC4899;
  --accent-yellow: #EAB308;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --glass-bg: rgba(26, 27, 35, 0.6);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-blur: 16px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* -- 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);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* -- Section Base -- */
.section {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-family: var(--font-body);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: clamp(14px, 1.5vw, 17px);
  font-weight: 400;
  color: var(--text-tertiary);
  max-width: 640px;
  margin: 20px auto 0;
  line-height: 1.7;
}

.title-accent {
  width: 64px;
  height: 2px;
  background: var(--accent-cyan);
  margin: 0 auto;
  border-radius: 1px;
}

/* ==========================================
   SECTION 1: HERO
   ========================================== */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  pointer-events: none;
}

.hero-title {
  font-family: var(--font-body);
  font-size: clamp(48px, 10vw, 96px);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  line-height: 1.1;
  text-shadow: 0 0 60px rgba(0, 180, 216, 0.15);
}

.hero-version {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.5vw, 24px);
  font-weight: 500;
  color: var(--accent-cyan);
  letter-spacing: 0.2em;
  margin-top: 8px;
  display: inline-block;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 300;
  color: var(--text-secondary);
  margin-top: 16px;
  letter-spacing: 0.02em;
}

.hero-divider {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  margin: 24px 0;
  animation: pulse-line 3s ease-in-out infinite;
}

@keyframes pulse-line {
  0%, 100% { opacity: 0.4; width: 48px; }
  50% { opacity: 1; width: 80px; }
}

.hero-acronym {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.2vw, 13px);
  font-weight: 400;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  max-width: 600px;
  line-height: 1.8;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  animation: scroll-bounce 2s ease-in-out infinite;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-chevron {
  color: var(--text-tertiary);
  opacity: 0.6;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* ==========================================
   SECTION 2: INDUSTRY SEGMENTS
   ========================================== */
.industries {
  min-height: 100vh;
  padding: 120px 24px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-secondary);
}

/* -- Industry Ring Layout -- */
.industry-ring-container {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 540px;
  margin: 0 auto 64px;
}

.ring-connections {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.ring-hub {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.hub-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 180, 216, 0.08);
  border: 1px solid rgba(0, 180, 216, 0.25);
  border-radius: 50%;
  animation: hub-pulse 4s ease-in-out infinite;
}

@keyframes hub-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 180, 216, 0.05); }
  50% { box-shadow: 0 0 40px rgba(0, 180, 216, 0.15); }
}

.hub-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.15em;
}

/* -- Industry Nodes -- */
.industry-node {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  z-index: 2;
  cursor: default;
  /* Position in a ring using CSS custom property --angle */
  --ring-radius: 210px;
  transform:
    translate(-50%, -50%)
    rotate(var(--angle))
    translateY(calc(-1 * var(--ring-radius)))
    rotate(calc(-1 * var(--angle)));
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.industry-node:hover {
  --ring-radius: 220px;
}

.node-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  color: var(--node-color, var(--accent-cyan));
  transition: var(--transition-base);
}

.industry-node:hover .node-icon {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--node-color, var(--accent-cyan));
  box-shadow: 0 0 24px color-mix(in srgb, var(--node-color) 20%, transparent);
}

.node-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.node-tools {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* -- Connection Lines in SVG -- */
.ring-line {
  stroke: url(#ring-line-grad);
  stroke-width: 1;
  fill: none;
  stroke-dasharray: 6 4;
  animation: dash-flow 3s linear infinite;
  opacity: 0.4;
}

/* -- Terminal Carousel -- */
.terminal-carousel {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.carousel-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 0;
}

.carousel-tabs::-webkit-scrollbar {
  display: none;
}

.carousel-tab {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 8px 16px;
  cursor: pointer;
  transition: var(--transition-base);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.carousel-tab:hover {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
}

.carousel-tab.active {
  color: var(--accent-cyan);
  background: var(--bg-primary);
  border-color: var(--glass-border);
}

/* Mock Terminal */
.mock-terminal {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(35, 37, 41, 0.8);
  border-bottom: 1px solid var(--glass-border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  margin-left: 8px;
}

.terminal-body {
  padding: 20px 24px;
  overflow-x: auto;
  min-height: 200px;
  transition: opacity 0.25s ease;
}

.terminal-body pre {
  margin: 0;
  white-space: pre;
}

.terminal-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* Terminal syntax highlighting */
.t-prompt { color: var(--accent-green); }
.t-cmd { color: var(--text-primary); font-weight: 600; }
.t-string { color: var(--accent-purple); }
.t-key { color: var(--accent-cyan); }
.t-value { color: var(--text-primary); font-weight: 500; }
.t-unit { color: var(--text-tertiary); }
.t-comment { color: var(--text-tertiary); font-style: italic; }
.t-green { color: var(--accent-green); font-weight: 600; }
.t-orange { color: var(--accent-orange); font-weight: 500; }
.t-pink { color: var(--accent-pink); font-weight: 500; }

/* ==========================================
   SECTION 3: CAPABILITIES
   ========================================== */
.capabilities {
  min-height: 100vh;
  padding: 120px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--bg-primary);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.capability-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition-base);
  opacity: 0;
  transform: translateY(30px);
}

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

.capability-card:hover {
  border-color: rgba(0, 180, 216, 0.2);
  background: rgba(26, 27, 35, 0.8);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 180, 216, 0.06);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 180, 216, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.card-title {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-tertiary);
  line-height: 1.7;
}

/* ==========================================
   SECTION 4: ARCHITECTURE
   ========================================== */
.architecture {
  min-height: 80vh;
  padding: 100px 24px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--bg-secondary);
}

.arch-diagram {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

#arch-svg {
  width: 100%;
  height: auto;
}

.arch-flow-path {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 2;
}

.flow-dot {
  filter: drop-shadow(0 0 4px currentColor);
}

.arch-card {
  fill: var(--glass-bg);
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1;
  rx: 8;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

.arch-card.accent-cyan { stroke: rgba(0, 180, 216, 0.25); }
.arch-card.accent-purple { stroke: rgba(168, 85, 247, 0.25); }
.arch-card.accent-green { stroke: rgba(34, 197, 94, 0.25); }
.arch-card.accent-orange { stroke: rgba(249, 115, 22, 0.25); }

.arch-label {
  fill: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  text-anchor: middle;
}

.arch-sublabel {
  fill: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  text-anchor: middle;
}

/* ==========================================
   SECTION 5: CTA & FOOTER
   ========================================== */
.cta-section {
  padding: 120px 24px 80px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-primary);
}

.cta-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.cta-title {
  font-family: var(--font-body);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
  transition: var(--transition-base);
  letter-spacing: 0.03em;
}

.cta-button:hover {
  background: #00c8ef;
  box-shadow: 0 0 32px rgba(0, 180, 216, 0.3), 0 4px 16px rgba(0, 180, 216, 0.2);
  transform: translateY(-2px);
}

.secondary-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.secondary-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-base);
  letter-spacing: 0.02em;
}

.secondary-links a:hover {
  color: var(--accent-cyan);
}

.link-sep {
  color: var(--text-tertiary);
  opacity: 0.3;
}

/* Footer */
.site-footer {
  padding: 24px;
  background: var(--bg-primary);
  border-top: 1px solid var(--glass-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
}

.footer-attribution {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-attribution:hover {
  color: var(--accent-cyan);
}

/* ==========================================
   REVEAL ANIMATIONS (IntersectionObserver)
   ========================================== */
.section-header,
.industry-ring-container,
.terminal-carousel,
.arch-diagram,
.cta-content {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-header.visible,
.industry-ring-container.visible,
.terminal-carousel.visible,
.arch-diagram.visible,
.cta-content.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes dash-flow {
  to { stroke-dashoffset: -40; }
}

/* ==========================================
   RESPONSIVE — Mobile (375px+)
   ========================================== */
@media (max-width: 768px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .capability-card {
    padding: 24px 20px;
  }

  .hero-title {
    letter-spacing: 0.08em;
  }

  .hero-acronym {
    padding: 0 16px;
  }

  /* Industry ring → vertical list on mobile */
  .industry-ring-container {
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 0 16px;
  }

  .ring-hub {
    position: static;
    transform: none;
    margin-bottom: 16px;
  }

  .industry-node {
    position: static;
    transform: none !important;
    flex-direction: row;
    gap: 16px;
    width: 100%;
    max-width: 360px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
  }

  .industry-node:hover {
    --ring-radius: 210px;
    border-color: rgba(255, 255, 255, 0.12);
  }

  .node-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
  }

  .node-label, .node-tools {
    text-align: left;
  }

  .ring-connections {
    display: none;
  }

  .carousel-tabs {
    padding: 0 4px;
  }

  .carousel-tab {
    font-size: 10px;
    padding: 6px 10px;
  }

  .industries {
    padding: 80px 16px 60px;
  }

  .terminal-body {
    padding: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .terminal-body code {
    font-size: 11px;
    white-space: pre;
    word-break: normal;
    overflow-wrap: normal;
  }

  .mock-terminal {
    overflow: hidden;
  }

  .architecture {
    padding: 80px 16px;
  }

  #arch-svg {
    min-width: 600px;
  }

  .arch-diagram {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .cta-section {
    padding: 80px 24px 60px;
  }

  .cta-button {
    padding: 14px 32px;
    font-size: 15px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .secondary-links {
    gap: 12px;
  }

  .section-header {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .capabilities {
    padding: 80px 16px;
  }

  .section-title {
    font-size: 24px;
  }
}

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

  html {
    scroll-behavior: auto;
  }
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}