/* Rhino 3D — site styles */

:root {
  --bg: #0f1114;
  --bg-elevated: #181b21;
  --bg-card: #1c2028;
  --border: #2a3038;
  --border-light: #353d48;
  --text: #e8eaed;
  --text-muted: #8b939e;
  --text-dim: #5c6570;
  --accent: #c8cdd4;
  --accent-bright: #f0f2f5;
  --highlight: #4a9eff;
  --highlight-dim: rgba(74, 158, 255, 0.12);
  --radius: 10px;
  --radius-lg: 16px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --header-h: 64px;
  --container: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--highlight);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--accent-bright);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--highlight);
  color: var(--bg);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(15, 17, 20, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--accent-bright);
}

.brand-icon {
  color: var(--accent);
}

.brand-text {
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand-text strong {
  font-weight: 600;
}

.nav {
  flex: 1;
}

.nav-menu {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  display: block;
  padding: 0.45rem 0.75rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}

.nav-menu a:hover {
  color: var(--text);
  background: var(--bg-elevated);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform 0.2s, opacity 0.2s;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s, color 0.2s, transform 0.15s;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-bright);
  color: var(--bg);
  border-color: var(--accent-bright);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-light);
}

.btn-ghost:hover {
  background: var(--bg-elevated);
  color: var(--accent-bright);
  border-color: var(--border-light);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0 5rem;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 75%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 52ch;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.meta-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  background: var(--bg-elevated);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.platform-row {
  display: flex;
  gap: 0.75rem;
}

.platform-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

/* Hero visual — wireframe cube */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.wireframe-cube {
  position: relative;
  width: 180px;
  height: 180px;
  transform-style: preserve-3d;
  animation: cube-rotate 24s linear infinite;
}

.cube-face {
  position: absolute;
  width: 180px;
  height: 180px;
  border: 1.5px solid var(--border-light);
  background: var(--highlight-dim);
}

.cube-face.front  { transform: translateZ(90px); }
.cube-face.back   { transform: rotateY(180deg) translateZ(90px); }
.cube-face.right  { transform: rotateY(90deg) translateZ(90px); }
.cube-face.left   { transform: rotateY(-90deg) translateZ(90px); }
.cube-face.top    { transform: rotateX(90deg) translateZ(90px); }
.cube-face.bottom { transform: rotateX(-90deg) translateZ(90px); }

@keyframes cube-rotate {
  from { transform: rotateX(-18deg) rotateY(0deg); }
  to   { transform: rotateX(-18deg) rotateY(360deg); }
}

.curve-line {
  position: absolute;
  border: 1px solid var(--border-light);
  border-radius: 50%;
  opacity: 0.5;
}

.curve-1 {
  width: 280px;
  height: 140px;
  top: 10%;
  right: 5%;
  border-radius: 50%;
  transform: rotate(-25deg);
}

.curve-2 {
  width: 200px;
  height: 200px;
  bottom: 5%;
  left: 0;
  border-radius: 50%;
}

.curve-3 {
  width: 120px;
  height: 60px;
  top: 40%;
  left: 10%;
  transform: rotate(15deg);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.section-sub {
  color: var(--text-muted);
  margin: 0;
  font-size: 1rem;
}

.overview {
  border-bottom: 1px solid var(--border);
}

.overview-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.overview-text p {
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.overview-text p:last-child {
  margin-bottom: 0;
}

.info-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.info-card h3 {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.info-list {
  margin: 0;
}

.info-list div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.info-list div:last-child {
  border-bottom: none;
}

.info-list dt {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.info-list dd {
  font-size: 0.9rem;
  margin: 0;
  text-align: right;
}

/* Features */
.features {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-card {
  padding: 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

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

.feature-icon {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* Tags */
.industries {
  border-bottom: 1px solid var(--border);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}

.tag-cloud:last-child {
  margin-bottom: 0;
}

.tag-cloud li {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  background: var(--bg-elevated);
  transition: border-color 0.2s, color 0.2s;
}

.tag-cloud li:hover {
  border-color: var(--border-light);
  color: var(--text);
}

.tag-cloud--muted li {
  font-size: 0.8rem;
  color: var(--text-dim);
  background: transparent;
}

/* Platforms */
.platforms-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-image: radial-gradient(ellipse 80% 60% at 100% 0%, var(--highlight-dim), transparent 60%);
}

.platforms-content h2 {
  font-size: 1.75rem;
  margin: 0 0 0.75rem;
}

.platforms-content p {
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

.platforms-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.platforms-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.platforms-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--highlight);
  border-radius: 50%;
}

.platforms-badges {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.platform-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

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

.platform-stat-value {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  letter-spacing: 0.04em;
}

/* Related */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-card {
  padding: 1rem 1.25rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: border-color 0.2s, color 0.2s;
}

.related-card:hover {
  border-color: var(--border-light);
  color: var(--text);
}

/* Footer */
.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0.5rem 0 0;
  max-width: 36ch;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: start;
}

.footer-nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-copy {
  grid-column: 1 / -1;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 1.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner,
  .overview-grid,
  .platforms-card,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 240px;
    order: -1;
  }

  .wireframe-cube {
    width: 140px;
    height: 140px;
  }

  .cube-face {
    width: 140px;
    height: 140px;
  }

  .cube-face.front  { transform: translateZ(70px); }
  .cube-face.back   { transform: rotateY(180deg) translateZ(70px); }
  .cube-face.right  { transform: rotateY(90deg) translateZ(70px); }
  .cube-face.left   { transform: rotateY(-90deg) translateZ(70px); }
  .cube-face.top    { transform: rotateX(90deg) translateZ(70px); }
  .cube-face.bottom { transform: rotateX(-90deg) translateZ(70px); }

  .header-inner .btn-sm {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s;
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu a {
    padding: 0.75rem 1rem;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 3.5rem 0;
  }

  .cta-row {
    flex-direction: column;
  }

  .cta-row .btn {
    width: 100%;
  }

  .platform-row {
    flex-direction: column;
  }

  .platforms-card {
    padding: 1.5rem;
  }
}