/* Public chrome + blog reading UI (reset, header, layout, article, footer).
   Split from public.css so each file stays under the RF throttle budget (16 KiB raw). */

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--tm-font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--tm-color-text);
  background:
    radial-gradient(60rem 60rem at 100% -10%, color-mix(in srgb, var(--tm-color-primary) 10%, transparent), transparent 60%),
    var(--tm-color-bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--tm-color-link);
  text-decoration: none;
}

a:hover {
  color: var(--tm-color-link-hover);
  text-decoration: underline;
}

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

:focus-visible {
  outline: none;
  box-shadow: var(--p-focus-ring);
  border-radius: var(--tm-radius-sm);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--tm-header-bg);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--tm-color-border);
}

.site-header__inner,
.site-footer__inner,
.page-shell {
  width: min(100% - 2rem, 1080px);
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tm-space-md);
  padding: var(--tm-space-md) 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--tm-color-text);
  text-decoration: none;
}

.site-brand:hover {
  color: var(--tm-color-text);
  text-decoration: none;
}

.site-brand__mark {
  width: 2rem;
  height: 2rem;
  flex: none;
  border-radius: 9px;
}

.brand-mark__dark,
.site-footer__mark.brand-mark__dark {
  display: none;
}

:root[data-color-scheme$="-dark"] .brand-mark__light {
  display: none;
}

:root[data-color-scheme$="-dark"] .brand-mark__dark {
  display: inline-block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-color-scheme]) .brand-mark__light {
    display: none;
  }

  :root:not([data-color-scheme]) .brand-mark__dark {
    display: inline-block;
  }
}

.site-brand__name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60vw;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--tm-space-sm);
}

/* Color scheme picker */
.color-scheme-picker {
  position: relative;
}

.color-scheme-picker__trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-pill);
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.color-scheme-picker__trigger:hover,
.color-scheme-picker__trigger:focus-visible {
  border-color: var(--tm-color-primary);
  outline: none;
  box-shadow: var(--p-focus-ring);
}

.color-scheme-picker__current {
  display: block;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--tm-color-text) 12%, transparent);
}

.color-scheme-picker__menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(2, minmax(7.5rem, 1fr));
  gap: 0.35rem;
  min-width: 16rem;
  padding: 0.5rem;
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-md);
  box-shadow: var(--tm-shadow-md);
}

.color-scheme-picker__menu[hidden] {
  display: none;
}

.color-scheme-picker__option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  font: inherit;
  font-size: 0.8rem;
  color: var(--tm-color-text);
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--tm-radius-sm);
  cursor: pointer;
}

.color-scheme-picker__option:hover,
.color-scheme-picker__option:focus-visible {
  background: var(--tm-color-surface-2);
  outline: none;
}

.color-scheme-picker__option.is-active {
  border-color: var(--tm-color-primary);
  background: color-mix(in srgb, var(--tm-color-primary) 10%, transparent);
}

.color-scheme-picker__swatch {
  flex: none;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--tm-color-text) 12%, transparent);
}

.color-scheme-picker__label {
  line-height: 1.2;
}

/* ---------- Layout ---------- */
.page-shell {
  display: grid;
  gap: var(--tm-space-xl);
  padding: var(--tm-space-xl) 0 var(--tm-space-2xl);
  flex: 1 0 auto;
  align-content: start;
  align-items: start;
}

@media (min-width: 768px) {
  .page-shell--with-sidebar {
    grid-template-columns: 1fr var(--tm-sidebar-width);
  }
}

.page-main {
  display: grid;
  gap: var(--tm-space-xl);
  min-width: 0;
  align-content: start;
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--tm-space-xl);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--tm-color-primary) 10%, transparent), transparent 55%),
    var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-md);
  box-shadow: var(--tm-shadow-sm);
}

.hero__title {
  margin: 0 0 var(--tm-space-sm);
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero__description {
  margin: 0;
  color: var(--tm-color-text-muted);
  font-size: 1.05rem;
  max-width: 60ch;
}

.section-title {
  margin: 0 0 var(--tm-space-md);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tm-color-text-muted);
}

/* ---------- Post list / cards ---------- */
.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--tm-space-lg);
}

.post-card {
  position: relative;
  display: block;
  padding: var(--tm-space-lg);
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-md);
  box-shadow: var(--tm-shadow-sm);
  transition: box-shadow 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

.post-card--link {
  color: inherit;
  text-decoration: none;
}

.post-card:hover,
.post-card--link:hover {
  box-shadow: var(--tm-shadow-md);
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--tm-color-primary) 35%, var(--tm-color-border));
}

.post-card__title {
  margin: 0 0 var(--tm-space-sm);
  font-size: 1.3rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.post-card--link:hover .post-card__title {
  color: var(--tm-color-primary);
}

.post-card__meta {
  margin: 0 0 var(--tm-space-sm);
  font-size: 0.82rem;
  color: var(--tm-color-text-muted);
}

.post-card__excerpt {
  margin: 0 0 var(--tm-space-md);
  color: var(--tm-color-text-muted);
}

.post-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.post-card__link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.post-card:hover .post-card__link::after {
  transform: translateX(3px);
}

.owner-controls {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: var(--tm-space-md) 0 0;
  padding: 0;
  background: transparent;
  border: none;
}

.owner-controls__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--tm-color-text);
  text-decoration: none;
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-sm);
  white-space: nowrap;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.owner-controls__icon {
  flex: none;
  width: 0.875rem;
  height: 0.875rem;
  opacity: 0.85;
}

.owner-controls__link:hover {
  color: var(--tm-color-primary);
  border-color: color-mix(in srgb, var(--tm-color-primary) 40%, var(--tm-color-border));
  background: color-mix(in srgb, var(--tm-color-primary) 8%, var(--tm-color-surface));
  text-decoration: none;
}

.owner-controls__link:hover .owner-controls__icon {
  opacity: 1;
}

.hero .owner-controls,
.post-article__header .owner-controls {
  margin-top: var(--tm-space-md);
}

.site-footer__brand-link {
  color: inherit;
  font-weight: 600;
  text-decoration: none;
}

.site-footer__brand-link:hover {
  color: var(--tm-color-primary);
  text-decoration: underline;
}

/* ---------- Sidebar ---------- */
.sidebar-panel {
  padding: var(--tm-space-lg);
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-md);
  box-shadow: var(--tm-shadow-sm);
}

@media (min-width: 768px) {
  .sidebar-panel {
    position: sticky;
    top: calc(64px + var(--tm-space-lg));
  }
}

.category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--tm-space-sm);
}

.category-list a {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-size: 0.9rem;
  color: var(--tm-color-text);
  background: var(--tm-color-surface-2);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-pill);
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.category-list a:hover {
  color: var(--tm-color-primary);
  border-color: var(--tm-color-primary);
  text-decoration: none;
}

/* ---------- Article ---------- */
.post-article {
  max-width: var(--tm-container-max);
  margin-inline: auto;
  width: 100%;
}

.post-article__header {
  margin-bottom: var(--tm-space-xl);
}

.post-article__title {
  margin: 0 0 var(--tm-space-sm);
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.post-article__meta {
  margin: 0;
  color: var(--tm-color-text-muted);
  font-size: 0.9rem;
}

.post-body {
  padding: var(--tm-space-xl);
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-md);
  box-shadow: var(--tm-shadow-sm);
  line-height: 1.75;
  font-size: 1.05rem;
}

.post-body > *:first-child {
  margin-top: 0;
}

.post-body h1,
.post-body h2,
.post-body h3,
.post-body h4 {
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-top: 1.75em;
  margin-bottom: 0.5em;
}

.post-body h1:first-child,
.post-body h2:first-child,
.post-body h3:first-child {
  margin-top: 0;
}

.post-body p,
.post-body ul,
.post-body ol,
.post-body blockquote,
.post-body pre,
.post-body table {
  margin: 0 0 1.1em;
}

.post-body a {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.post-body pre {
  padding: var(--tm-space-md);
  overflow-x: auto;
  background: var(--p-surface-900);
  color: var(--p-surface-100);
  border-radius: var(--tm-radius-sm);
  font-family: var(--tm-font-mono);
  font-size: 0.875rem;
}

.post-body :not(pre) > code {
  font-family: var(--tm-font-mono);
  font-size: 0.875em;
  padding: 0.12em 0.4em;
  background: var(--tm-color-surface-2);
  border-radius: 6px;
}

.post-body blockquote {
  padding: 0.25rem 0 0.25rem var(--tm-space-md);
  border-left: 4px solid var(--tm-color-primary);
  color: var(--tm-color-text-muted);
  font-style: italic;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.post-body th,
.post-body td {
  padding: var(--tm-space-sm) var(--tm-space-md);
  border: 1px solid var(--tm-color-border);
  text-align: left;
}

.post-body th {
  background: var(--tm-color-surface-2);
}

.post-body img {
  border-radius: var(--tm-radius-sm);
}

.post-tags {
  margin-top: var(--tm-space-xl);
}

.post-tags__label {
  margin: 0 0 var(--tm-space-sm);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tm-color-text-muted);
}

.post-tags__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--tm-space-sm);
}

.post-tags__chip {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-size: 0.9rem;
  color: var(--tm-color-text);
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-pill);
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.post-tags__chip:hover {
  color: var(--tm-color-primary);
  border-color: var(--tm-color-primary);
  text-decoration: none;
}

/* ---------- Pagination ---------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--tm-space-md);
  margin-top: var(--tm-space-xl);
}

.pagination__btn {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--tm-color-primary);
  background: var(--tm-color-surface);
  border: 1px solid var(--tm-color-border);
  border-radius: var(--tm-radius-pill);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.pagination__btn:hover {
  background: color-mix(in srgb, var(--tm-color-primary) 10%, var(--tm-color-surface));
  border-color: var(--tm-color-primary);
  text-decoration: none;
}

.pagination__btn[aria-disabled="true"] {
  opacity: 0.4;
  pointer-events: none;
}

.pagination__info {
  color: var(--tm-color-text-muted);
  font-size: 0.9rem;
}

/* ---------- Empty / back ---------- */
.empty-state {
  padding: var(--tm-space-xl);
  text-align: center;
  color: var(--tm-color-text-muted);
  background: var(--tm-color-surface);
  border: 1px dashed var(--tm-color-border);
  border-radius: var(--tm-radius-md);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: var(--tm-space-lg);
  font-weight: 600;
  font-size: 0.92rem;
}

.back-link::before {
  content: "←";
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: auto;
  padding: var(--tm-space-lg) 0;
  border-top: 1px solid var(--tm-color-border);
  background: var(--tm-color-surface);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--tm-space-sm) var(--tm-space-md);
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--tm-color-text-muted);
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.site-footer__mark {
  width: 1.25rem;
  height: 1.25rem;
}

/* ---------- Not found ---------- */
.not-found {
  text-align: center;
  padding: var(--tm-space-2xl) var(--tm-space-lg);
  margin-inline: auto;
  max-width: 32rem;
}

.not-found h1 {
  margin: 0 0 var(--tm-space-md);
  font-size: clamp(2rem, 6vw, 2.75rem);
}

.not-found p {
  margin: 0 0 var(--tm-space-lg);
  color: var(--tm-color-text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page-shell--narrow {
  width: min(100% - 2rem, 760px);
}