/*
 * Hao's Notes design system foundation
 *
 * al-folio remains the Jekyll/runtime layer. This file is the first
 * canonical Hao-owned visual layer and should become the long-term
 * design contract for the site.
 */

:root {
  --hao-page-max: min(100%, 68rem);
  --hao-content-max: min(100%, 62rem);
  --hao-reading-max: min(100%, 46rem);
  --hao-radius-sm: 6px;
  --hao-radius-md: 10px;
  --hao-radius-lg: 16px;
  --hao-border-subtle: color-mix(in srgb, var(--global-divider-color, rgba(15, 23, 42, 0.14)) 72%, transparent);
  --hao-surface-base: var(--global-bg-color, #fff);
  --hao-surface-soft: color-mix(in srgb, var(--global-text-color, #111827) 2.2%, transparent);
  --hao-surface-hover: color-mix(in srgb, var(--global-theme-color, #2f6fed) 6%, transparent);
  --hao-text-muted: color-mix(in srgb, var(--global-text-color, #111827) 66%, transparent);
  --hao-shadow-card: 0 10px 30px rgba(15, 23, 42, 0.045);
  --hao-shadow-card-hover: 0 16px 44px rgba(15, 23, 42, 0.082);
  --hao-focus-ring: 0 0 0 3px color-mix(in srgb, var(--global-theme-color, #2f6fed) 18%, transparent);
  --hao-space-section: clamp(2rem, 4vw, 3.25rem);
  --hao-space-card: clamp(1rem, 2vw, 1.25rem);
  --hao-mission-accent: var(--global-theme-color, #7c3aed);
  --hao-mission-soft: color-mix(in srgb, var(--hao-mission-accent) 8%, transparent);
  --hao-mission-line: color-mix(in srgb, var(--hao-mission-accent) 24%, transparent);
}

html[data-theme="dark"] {
  --hao-border-subtle: color-mix(in srgb, var(--global-divider-color, rgba(255, 255, 255, 0.16)) 80%, transparent);
  --hao-surface-soft: color-mix(in srgb, var(--global-text-color, #f8fafc) 4%, transparent);
  --hao-surface-hover: color-mix(in srgb, var(--global-theme-color, #7aa2ff) 12%, transparent);
  --hao-shadow-card: 0 12px 32px rgba(0, 0, 0, 0.18);
  --hao-shadow-card-hover: 0 18px 46px rgba(0, 0, 0, 0.26);
  --hao-mission-soft: color-mix(in srgb, var(--hao-mission-accent) 16%, transparent);
  --hao-mission-line: color-mix(in srgb, var(--hao-mission-accent) 36%, transparent);
}

/* Global editorial rhythm */
.post-header,
.header-bar,
.repo-page-intro,
.projects,
.repo-section,
article > .post-content,
article > .clearfix,
article > .lead,
.cv {
  max-width: var(--hao-content-max);
}

.post-header .post-title,
.header-bar h1,
article h1,
article h2,
article h3 {
  letter-spacing: -0.018em;
}

.post-header .post-description,
.header-bar h2,
.repo-page-intro,
article > .lead {
  color: var(--hao-text-muted);
}

article p,
article li {
  text-wrap: pretty;
}

/* Canonical Hao card surface */
.featured-posts .card,
.post-list > li,
.projects .card,
.repo-card,
.repo-profile-card,
.cv .card {
  border-color: var(--hao-border-subtle) !important;
  border-radius: var(--hao-radius-md) !important;
  background: linear-gradient(180deg, var(--hao-surface-base), var(--hao-surface-soft));
  box-shadow: none;
}

.featured-posts a:hover .card,
.post-list > li:hover,
.projects a:hover .card,
.repo-card:hover {
  box-shadow: var(--hao-shadow-card-hover);
}

/* Canonical Hao links and CTAs */
article a,
.repo-card__cta,
.home-social-cta__primary {
  text-underline-offset: 4px;
}

article a:focus-visible,
.repo-card__cta:focus-visible,
.home-social-cta__primary:focus-visible,
button:focus-visible,
[role="button"]:focus-visible {
  border-radius: var(--hao-radius-sm);
  outline: none;
  box-shadow: var(--hao-focus-ring);
}

.repo-card__cta--primary {
  border-radius: 999px;
  font-weight: 650;
}

/* Mission Log homepage shell */
.mission-log-home {
  max-width: var(--hao-content-max);
  margin: clamp(1.5rem, 4vw, 3rem) 0 var(--hao-space-section);
}

.mission-cover,
.mission-index,
.mission-section {
  position: relative;
  border: 1px solid var(--hao-border-subtle);
  border-radius: var(--hao-radius-lg);
  background:
    radial-gradient(circle at 18% 0%, var(--hao-mission-soft), transparent 36%),
    linear-gradient(180deg, var(--hao-surface-base), var(--hao-surface-soft));
  box-shadow: var(--hao-shadow-card);
}

.mission-cover {
  padding: clamp(1.45rem, 4vw, 2.8rem);
  overflow: hidden;
}

.mission-cover::after {
  content: "";
  position: absolute;
  right: clamp(-5rem, -8vw, -2rem);
  bottom: clamp(-5rem, -9vw, -2rem);
  width: min(24rem, 60vw);
  aspect-ratio: 1;
  border: 1px solid var(--hao-mission-line);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 49%, var(--hao-mission-line) 50%, transparent 51%),
    linear-gradient(0deg, transparent 49%, var(--hao-mission-line) 50%, transparent 51%);
  opacity: 0.46;
  pointer-events: none;
}

.mission-section-kicker {
  color: var(--hao-mission-accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-transform: uppercase;
}

.mission-cover h1 {
  max-width: 44rem;
  margin: 0.75rem 0 0;
  font-size: clamp(2.2rem, 7vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.mission-cover__subtitle {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--global-text-color, #111827);
  font-size: clamp(1.05rem, 2.1vw, 1.45rem);
  line-height: 1.35;
}

.mission-cover__note,
.mission-index p,
.mission-section p {
  max-width: var(--hao-reading-max);
  color: var(--hao-text-muted);
}

.mission-cover__note {
  margin-top: 1rem;
}

.mission-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.mission-button {
  display: inline-flex;
  min-height: 2.45rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--hao-border-subtle);
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  color: var(--global-text-color, #111827);
  font-weight: 650;
  text-decoration: none;
}

.mission-button:hover {
  border-color: var(--hao-mission-line);
  background: var(--hao-mission-soft);
  text-decoration: none;
}

.mission-button--primary {
  border-color: var(--hao-mission-accent);
  background: var(--hao-mission-accent);
  color: var(--global-bg-color, #fff);
}

.mission-index,
.mission-section {
  margin-top: 1rem;
  padding: clamp(1.15rem, 3vw, 1.75rem);
}

.mission-index h2,
.mission-section h2 {
  margin: 0.45rem 0 0.55rem;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
}

.mission-index__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.mission-index__item {
  display: block;
  border: 1px solid var(--hao-border-subtle);
  border-radius: var(--hao-radius-md);
  padding: 0.85rem 0.95rem;
  background: color-mix(in srgb, var(--hao-surface-base) 82%, var(--hao-mission-soft));
  text-decoration: none;
}

.mission-index__item:hover {
  border-color: var(--hao-mission-line);
  background: var(--hao-mission-soft);
  text-decoration: none;
}

.mission-index__item span {
  display: block;
  color: var(--hao-mission-accent);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.mission-index__item strong {
  display: block;
  margin-top: 0.28rem;
  color: var(--global-text-color, #111827);
  font-size: 0.98rem;
}

.mission-section__intro {
  margin-bottom: 1.1rem;
}

.operations-log {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.15rem;
}

.operations-log__entry {
  display: grid;
  grid-template-columns: minmax(7.5rem, 0.34fr) minmax(0, 1fr);
  gap: 1rem;
  border: 1px solid var(--hao-border-subtle);
  border-radius: var(--hao-radius-md);
  padding: 0.95rem;
  background: color-mix(in srgb, var(--hao-surface-base) 86%, var(--hao-mission-soft));
}

.operations-log__meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--hao-mission-accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.operations-log__meta strong {
  color: var(--hao-text-muted);
  font-size: 0.68rem;
  line-height: 1.25;
}

.operations-log__body h3 {
  margin: 0;
  font-size: 1.05rem;
}

.operations-log__body p {
  margin: 0.35rem 0 0;
}

.operations-log__body a {
  display: inline-flex;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 650;
}

/* Product/app repository cards should be scan-friendly and not template-heavy. */
.repo-card__chips {
  gap: 0.42rem;
}

.repo-chip {
  border-color: var(--hao-border-subtle);
  background: color-mix(in srgb, var(--hao-surface-soft) 70%, transparent);
}

.repo-card__summary p,
.projects .card-text,
.post-list > li > p:not(.post-meta):not(.post-tags) {
  color: var(--hao-text-muted);
}

/* CV remains formal, but visually belongs to Hao's Notes. */
body:has(.cv) nav[data-toggle="toc"],
body:has(.cv) #toc-sidebar,
body:has(.cv) .toc-sidebar {
  border-radius: var(--hao-radius-md);
}

body:has(.cv) nav[data-toggle="toc"] a:hover,
body:has(.cv) #toc-sidebar a:hover,
body:has(.cv) .toc-sidebar a:hover {
  background: var(--hao-surface-hover);
}

/* Prevent regression to a visible heavy native scrollbar in the CV sidebar. */
body:has(.cv) #toc-sidebar,
body:has(.cv) .toc-sidebar,
body:has(.cv) nav[data-toggle="toc"],
body:has(.cv) .sticky-top {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

body:has(.cv) #toc-sidebar::-webkit-scrollbar,
body:has(.cv) .toc-sidebar::-webkit-scrollbar,
body:has(.cv) nav[data-toggle="toc"]::-webkit-scrollbar,
body:has(.cv) .sticky-top::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

@media (max-width: 767px) {
  :root {
    --hao-space-section: 2rem;
  }

  .post-header,
  .header-bar,
  .repo-page-intro,
  .projects,
  .repo-section,
  article > .post-content,
  article > .clearfix,
  article > .lead,
  .cv,
  .mission-log-home {
    max-width: 100%;
  }

  .mission-index__grid,
  .operations-log__entry {
    grid-template-columns: 1fr;
  }

  .mission-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .featured-posts .card,
  .post-list > li,
  .projects .card,
  .repo-card,
  .home-social-cta__primary,
  .repo-card__cta--primary,
  .mission-button,
  .mission-index__item {
    transition: none !important;
  }
}