/* Cumulus26 — Azure Marketplace learning hub */

:root {
  --color-primary: #00a4e4;
  --color-primary-hover: #0088c4;
  --color-primary-soft: rgba(0, 164, 228, 0.12);
  --color-primary-muted: rgba(0, 164, 228, 0.35);
  --color-ink: #0f172a;
  --color-ink-secondary: #475569;
  --color-surface: #ffffff;
  --color-canvas: #f4f8fb;
  --color-border: #e2e8f0;
  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 40px rgba(0, 164, 228, 0.18);
  --header-h: 4rem;
  --page-max-width: 72rem;
  /* Match shell header + page content so columns line up */
  --page-pad-x: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-canvas);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Root shell: header + main + footer */
body.site-shell {
  min-height: 100vh;
}

a {
  color: var(--color-primary-hover);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

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

/* Header: brand + nav on white */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--page-pad-x);
  height: 100%;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 1rem;
}

.site-header__home {
  align-self: center;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 500;
}

.site-header__home:hover,
.site-header__home:visited,
.site-header__home:active {
  color: var(--color-ink);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-ink);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  background: #fff;
  padding: 0 var(--page-pad-x);
  margin-left: calc(-1 * var(--page-pad-x));
  padding-left: var(--page-pad-x);
  box-shadow: none;
}

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

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

.brand__logo {
  display: block;
  height: 2.25rem;
  width: auto;
  max-width: min(12rem, 55vw);
  object-fit: contain;
  object-position: left center;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  align-self: center;
  padding: 0.5rem;
  cursor: pointer;
  border-radius: 8px;
  color: var(--color-ink);
}

.nav-toggle-label:hover {
  background: var(--color-primary-soft);
}

.site-nav {
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1 1 auto;
  min-width: 0;
  background: #fff;
}

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

.site-nav a {
  color: var(--color-ink-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-primary-hover);
}

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

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: block;
    flex: none;
    justify-content: initial;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease;
  }

  .nav-toggle:checked ~ .site-nav {
    max-height: 320px;
    opacity: 1;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* Main */
main {
  flex: 1;
}

.wrap {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--page-pad-x);
}

/* .hero is a flex container; without an explicit width, .wrap sizes like a flex item
   and can sit off the same grid as .site-header__inner (see screenshot misalignment). */
.hero .wrap {
  box-sizing: border-box;
  width: min(100%, var(--page-max-width));
  flex: 0 0 auto;
}

/* Hero (page title band — solid primary, white type) */
.hero {
  background: var(--color-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: 2rem 0 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 14rem;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0.75rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 4vw, 2.65rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: #fff;
}

.hero p.lead {
  margin: 0 0 1.75rem;
  max-width: 40rem;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.125rem;
}

.hero p.lead:last-child {
  margin-bottom: 0;
}

.hero p.lead a {
  color: #fff;
  font-weight: 600;
}

.hero p.lead a:hover {
  color: rgba(255, 255, 255, 0.85);
}

.hero code {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.12em 0.4em;
  border-radius: 6px;
  font-size: 0.95em;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

/* Hero CTAs: contrast on primary background */
.hero .btn--primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.hero .btn--primary:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary-hover);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
}

.hero .btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.hero .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

.hero .btn:focus-visible {
  outline-color: #fff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

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

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 16px var(--color-primary-muted);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn--ghost {
  background: var(--color-surface);
  color: var(--color-ink);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-primary-muted);
  color: var(--color-primary-hover);
}

/* Sections */
.section {
  padding: 2.5rem 0 3.5rem;
}

.section__title {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__intro {
  margin: 0 0 1.75rem;
  max-width: 48rem;
  color: var(--color-ink-secondary);
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: 1.25rem;
}

/* Same readable width as .prose blocks (two-up hub cards). */
.card-grid--measure {
  max-width: 48rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.35rem 1.35rem 1.15rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--color-primary-muted);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card h2,
.card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.card p {
  margin: 0 0 1.25rem;
  flex: 1;
  font-size: 0.98rem;
  color: var(--color-ink-secondary);
  line-height: 1.55;
}

.card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* Prose (inner pages) */
.prose {
  max-width: 48rem;
  padding: 2rem 0 3rem;
}

/* Outer column matches header/hero; readable width applies to blocks inside (not the whole .wrap, which was centering a 48rem box and stair-stepping left of Home). */
.wrap.prose {
  max-width: var(--page-max-width);
}

.wrap.prose > * {
  max-width: 48rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
}

.prose h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 650;
}

.prose p,
.prose li {
  color: var(--color-ink-secondary);
}

.prose ul {
  padding-left: 1.25rem;
}

/* Table of contents: link stack without list bullets */
.toc :is(ul, ol) {
  list-style: none;
  padding-left: 0;
  margin: 0 0 1.25rem;
}

.toc li {
  margin: 0.35rem 0;
}

.prose .video-desc {
  margin: 0.35rem 0 1.35rem;
  color: var(--color-ink-secondary);
  line-height: 1.65;
}

.prose .video-desc:last-child {
  margin-bottom: 0;
}

.prose .callout {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.figure-placeholder {
  margin: 1.5rem 0;
  padding: 2rem;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--color-primary-soft), #fff);
  border: 1px dashed var(--color-primary-muted);
  text-align: center;
  color: var(--color-ink-secondary);
  font-size: 0.9375rem;
}

/* Tile grid (hub sub-pages) */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
  gap: 1.25rem;
  padding: 0 0 3rem;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--color-ink);
  color: #cbd5e1;
  padding: 1.25rem 0;
}

.site-footer a {
  color: #7dd3fc;
}

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

.site-footer__inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--page-pad-x);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.site-footer__brand {
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
}

.site-footer__tagline {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: #94a3b8;
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding-top: 0.25rem;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  margin-top: 0.25rem;
}

.site-footer__copy {
  font-size: 0.875rem;
  color: #94a3b8;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.site-footer__nav a {
  font-size: 0.875rem;
  font-weight: 600;
}

.site-footer--shell {
  padding: 0.65rem 0;
}

.site-footer--shell .site-footer__inner {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.site-footer--shell .site-footer__tagline {
  font-size: 0.8125rem;
  line-height: 1.35;
  max-width: none;
}

/* Resource list */
.resource-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.resource-list li {
  margin-bottom: 0.65rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--color-border);
}

.resource-list li:last-child {
  border-bottom: 0;
}