/* Robot marketing site — static, no external fonts */

:root {
  --color-bg: #f6f8fc;
  --color-bg-alt: #eef2fa;
  --color-surface: #ffffff;
  --color-text: #1a2233;
  --color-muted: #4a5568;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-soft: #dbeafe;
  --color-border: #c7d2e8;
  --color-code-bg: #0f172a;
  --color-code-text: #e2e8f0;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-soft: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.06);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
  --max-width: 1120px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  border-radius: var(--radius-md);
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  z-index: 2000;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 248, 252, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

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

.brand__mark {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--color-accent), #7c3aed);
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-accent-soft);
}

.brand__mark--small {
  width: 10px;
  height: 10px;
  box-shadow: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  border-radius: 1px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
}

.site-nav__list a:hover {
  color: var(--color-accent);
}

.site-nav__lang {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.site-nav__lang a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-nav__lang a:hover,
.site-nav__lang a.is-active {
  color: var(--color-accent);
}

.site-nav__lang-sep {
  margin: 0 0.35rem;
  color: var(--color-border);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.25rem 1.25rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__lang {
    padding-top: 1rem;
  }
}

/* Hero */
.hero {
  padding: 2.5rem 1.25rem 3rem;
  background: radial-gradient(ellipse 120% 80% at 50% -20%, var(--color-accent-soft), transparent);
}

.hero__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: center;
}

@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 800;
}

.lead {
  margin: 0 0 1.5rem;
  color: var(--color-muted);
  font-size: 1.1rem;
  max-width: 36rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 999px;
  border: 2px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

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

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero__media {
  margin-inline: auto;
  width: fit-content;
  background: var(--color-surface);
  padding: 0.75rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
  text-align: center;
}

.hero__media figcaption {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Sections */
.section {
  padding: 3rem 1.25rem;
}

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

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.section__intro {
  margin: 0 0 2rem;
  color: var(--color-muted);
  max-width: 48rem;
}

.section__outro {
  margin: 2rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Feature cards */
.feature-cards {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 900px) {
  .feature-cards {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-card);
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--color-muted);
}

.inline-figure {
  margin: 0 0 2.5rem;
  text-align: center;
}

.inline-figure img {
  box-shadow: var(--shadow-soft), 0 0 0 1px var(--color-border);
}

.inline-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* Media blocks */
.media-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.media-block--reverse .media-block__text {
  order: 2;
}

.media-block--reverse .media-block__figure,
.media-block--reverse .media-block__figures {
  order: 1;
}

.media-block__figure,
.media-block__figures figure {
  text-align: center;
}

@media (max-width: 900px) {
  .media-block,
  .media-block--reverse .media-block__text,
  .media-block--reverse .media-block__figure,
  .media-block--reverse .media-block__figures {
    grid-template-columns: 1fr;
    order: unset;
  }
}

.media-block__text h3 {
  margin: 0 0 0.5rem;
}

.media-block__text p {
  margin: 0;
  color: var(--color-muted);
}

.media-block__figure {
  width: fit-content;
  margin-inline: auto;
}

.media-block__figure img {
  box-shadow: var(--shadow-soft), 0 0 0 1px var(--color-border);
}

.media-block__figures {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.media-block__figures figure {
  margin: 0;
  flex: 1 1 200px;
}

.media-block__figures figcaption {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.media-block__figures img {
  display: block;
  margin: 0 auto;
  box-shadow: var(--shadow-card), 0 0 0 1px var(--color-border);
}

/* Two column + callout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 900px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}

.steps {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-muted);
}

.steps li {
  margin-bottom: 0.5rem;
}

.callout {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.callout h3 {
  margin: 0 0 0.5rem;
}

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

.track-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.95rem;
  color: var(--color-text);
}

.track-list li {
  margin-bottom: 0.35rem;
}

/* Code */
.code-showcase {
  margin-bottom: 2rem;
}

.code-showcase h3 {
  margin: 0 0 0.75rem;
}

.code-block {
  margin: 0;
  padding: 1.25rem 1.5rem;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
  border: 1px solid #334155;
}

/* Command grid */
.command-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 700px) {
  .command-grid {
    grid-template-columns: 1fr;
  }
}

.command-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-card);
}

.command-group h3 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.command-group dl {
  margin: 0;
}

.command-group dt {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-accent);
}

.command-group dt:first-child {
  margin-top: 0;
}

.command-group dd {
  margin: 0.2rem 0 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* Numbered list */
.numbered-list {
  margin: 0 0 1.5rem;
  padding-left: 1.35rem;
  color: var(--color-text);
}

.numbered-list li {
  margin-bottom: 0.65rem;
}

.requirements {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  border: 1px solid #bfdbfe;
  color: var(--color-text);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #e2e8f0;
  padding: 0.12em 0.35em;
  border-radius: 4px;
}

.code-block code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Footer */
.site-footer {
  padding: 2.5rem 1.25rem;
  background: #0f172a;
  color: #94a3b8;
}

.site-footer a {
  color: #cbd5e1;
}

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

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-footer__brand {
  margin: 0 0 1rem;
  font-weight: 700;
  color: #f1f5f9;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-footer__links {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}