/* Sharad Khare — Interactive Demos landing page */

:root {
  --color-bg: #f8fafc;
  --color-bg-gradient-top: #eef2ff;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-focus: #3558e0;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-card: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, 0.1), 0 4px 12px rgba(15, 23, 42, 0.06);
  --container-max: 1080px;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: linear-gradient(180deg, var(--color-bg-gradient-top) 0%, var(--color-bg) 280px, var(--color-bg) 100%);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-text);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

/* Header */
.site-header {
  padding-block: var(--space-3xl) var(--space-xl);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
}

.site-header__eyebrow {
  margin: 0 0 var(--space-xs);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header__title {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.site-header__subtitle {
  margin: 0;
  max-width: 36ch;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
}

.site-header__nav {
  flex-shrink: 0;
  padding-top: var(--space-xs);
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.625rem 1.125rem;
  min-height: 44px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header__link:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
}

.site-header__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.site-header__link-icon {
  font-size: 0.875rem;
  opacity: 0.7;
}

/* Main */
.main {
  padding-bottom: var(--space-3xl);
}

/* SEO intro — crawlable keyword-rich content */
.seo-intro {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.seo-intro__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.seo-intro__text strong {
  color: var(--color-text);
  font-weight: 600;
}

.seo-intro__text a {
  color: #3558e0;
  font-weight: 500;
  text-decoration: none;
}

.seo-intro__text a:hover {
  text-decoration: underline;
}

.seo-intro__text a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* FAQ section — matches JSON-LD FAQPage */
.seo-faq {
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.seo-faq__heading {
  margin: 0 0 var(--space-lg);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.seo-faq__list {
  margin: 0;
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .seo-faq__list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.seo-faq__item {
  margin: 0;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.seo-faq__question {
  margin: 0 0 var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.seo-faq__answer {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

/* Noscript fallback for crawlers and no-JS users */
.noscript-fallback {
  max-width: var(--container-max);
  margin: var(--space-lg) auto;
  padding: var(--space-lg);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: var(--radius-card);
}

.noscript-fallback ul {
  margin: var(--space-sm) 0 0;
  padding-left: 1.25rem;
}

.noscript-fallback a {
  color: #3558e0;
}

.demos__intro {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.demos__heading {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.demos__count {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Demo grid */
.demos__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .demos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Demo card */
.demo-card {
  display: flex;
}

.demo-card__link {
  --demo-accent: #3558e0;
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-lg);
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--demo-accent);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.demo-card__link:hover {
  border-color: #cbd5e1;
  border-left-color: var(--demo-accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.demo-card__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .demo-card__link {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .demo-card__link:hover {
    transform: none;
  }
}

.demo-card__icon-wrap {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  padding: 4px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--demo-accent) 12%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--demo-accent) 20%, transparent);
}

.demo-card__icon {
  width: 100%;
  height: 100%;
  border-radius: 10px;
  object-fit: cover;
}

.demo-card__body {
  flex: 1;
}

.demo-card__category {
  display: inline-block;
  margin-bottom: var(--space-sm);
  padding: 0.2rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--demo-accent);
  background: color-mix(in srgb, var(--demo-accent) 10%, transparent);
  border-radius: var(--radius-pill);
}

.demo-card__name {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.demo-card__tagline {
  margin: 0 0 var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.demo-card__description {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.demo-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: var(--space-lg);
  padding: 0.625rem 0;
  min-height: 44px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--demo-accent);
}

.demo-card__cta-arrow {
  transition: transform 0.2s ease;
}

.demo-card__link:hover .demo-card__cta-arrow {
  transform: translateX(3px);
}

@media (prefers-reduced-motion: reduce) {
  .demo-card__cta-arrow {
    transition: none;
  }

  .demo-card__link:hover .demo-card__cta-arrow {
    transform: none;
  }
}

/* Footer */
.site-footer {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.site-footer__credit,
.site-footer__copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer__credit a {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}

.site-footer__credit a:hover {
  text-decoration: underline;
}

.site-footer__credit a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}