/* ssgtheme — reset, layout and components.
 *
 * The reset, .container, .prose and the header/card/footer components follow
 * the Tradik design system's own stylesheet, so the built site reads as the
 * same family: flat surfaces, hairline borders in --color-border-subtle,
 * underline-on-accent navigation, whole-card links that lift on hover, an
 * inverse code block, and a serif display face against a sans UI face.
 *
 * Nothing here hard-codes a colour, size or duration that a token names.
 */

@import url("tokens.css");

/* ── Reset ──────────────────────────────────────────────────────────────── */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-fg-primary);
  background: var(--color-bg-canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a {
  color: var(--color-fg-link);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--color-accent-bg);
  color: var(--color-accent-fg);
}

/* ── Layout ─────────────────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.prose {
  max-width: 44rem;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: var(--space-4);
  background: var(--color-bg-inverse);
  color: var(--color-fg-onInverse);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: var(--space-2);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  font-size: var(--font-size-xs);
  color: var(--color-fg-muted);
  font-weight: var(--font-weight-medium);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ── Header ─────────────────────────────────────────────────────────────── */

.site-header {
  border-block-end: 1px solid var(--color-border-subtle);
  background: var(--color-bg-canvas);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(150%) blur(8px);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-block: var(--space-3);
}

@media (min-width: 768px) {
  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-fg-primary);
  text-decoration: none;
}

/* The mark is sized by height so any aspect ratio fits the 40 px header band;
 * it carries its own transparency, so no plate or filter is applied and it
 * reads on both schemes. */
.brand-mark {
  height: 2.25rem;
  width: auto;
  flex: none;
}

.brand-mark--footer {
  height: 3rem;
}

.brand-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-family-sans);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  letter-spacing: var(--letter-spacing-tight);
}

.brand-sub {
  font-size: var(--font-size-xs);
  color: var(--color-fg-muted);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
}

.nav-list a {
  color: var(--color-fg-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  padding-block: var(--space-1);
  border-block-end: 2px solid transparent;
}

.nav-list a:hover {
  color: var(--color-fg-primary);
}

.nav-list a[aria-current="page"] {
  color: var(--color-fg-primary);
  border-block-end-color: var(--color-accent-bg);
}

.stars {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  color: var(--color-fg-secondary);
  font-size: var(--font-size-xs);
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  white-space: nowrap;
}

.stars:hover {
  border-color: var(--color-border-strong);
  color: var(--color-fg-primary);
}

.version-note {
  color: var(--color-fg-muted);
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

.version-note a {
  color: var(--color-fg-accent);
  text-decoration: none;
}

.version-note a:hover {
  text-decoration: underline;
}

@media (max-width: 1023px) {
  .version-note {
    display: none;
  }
}

.theme-toggle {
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
  min-height: 2.5rem;
  min-width: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.theme-toggle:hover {
  color: var(--color-fg-primary);
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
  margin-block-start: var(--space-12);
}

/* A photographic hero keeps the same type contrast as a plain one: the image
 * sits under a scrim built from the canvas colour, so --color-fg-primary still
 * measures 17.9:1 (light) / 16.9:1 (dark) over it. The gradient is part of the
 * same background shorthand, so it can never be missing. */
.hero--image {
  position: relative;
  margin-block-start: 0;
  margin-inline: calc(var(--space-4) * -1);
  padding: var(--space-16) var(--space-4) var(--space-12);
  border-radius: var(--radius-xl);
  background-image: var(--hero-scrim), var(--hero-image-sm);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

/* The copy occupies the left half; keeping it there is what lets the scrim
 * fade out over the photograph instead of covering all of it. */
.hero--image .hero-actions,
.hero--image h1,
.hero--image p {
  max-width: 34rem;
}

@media (min-width: 768px) {
  .hero--image {
    margin-inline: 0;
    padding-block: var(--space-20) var(--space-16);
    padding-inline: var(--space-10);
    min-height: 30rem;
    background-image: var(--hero-scrim), var(--hero-image);
  }
}

/* A hairline border disappears over a photograph; the secondary button needs a
 * visible edge to stay a button. */
.hero--image .btn--secondary {
  border-color: var(--color-border-strong);
  background: var(--color-bg-canvas);
}

.hero h1 {
  font-family: var(--font-family-display);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin-block: var(--space-3) var(--space-4);
  max-width: 18ch;
}

.hero p {
  color: var(--color-fg-secondary);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-start: var(--space-6);
}

/* ── Buttons ────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2.5rem;
  padding-inline: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: background var(--motion-duration-fast) var(--motion-easing-standard),
    border-color var(--motion-duration-fast) var(--motion-easing-standard);
}

.btn--primary {
  background: var(--color-accent-bg);
  color: var(--color-accent-fg);
}

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

.btn--primary:active {
  background: var(--color-accent-bgActive);
}

.btn--secondary {
  border-color: var(--color-border-default);
  color: var(--color-fg-primary);
}

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

/* ── Sections and cards ─────────────────────────────────────────────────── */

.sections {
  margin-block-start: var(--space-12);
}

.section-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-tight);
  margin-block: var(--space-3) var(--space-2);
}

.section-lead {
  color: var(--color-fg-secondary);
  font-size: var(--font-size-sm);
  max-width: 60ch;
  margin-block-end: var(--space-6);
}

.cards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

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

@media (min-width: 1024px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  display: block;
  padding: var(--space-5);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--motion-duration-base) var(--motion-easing-standard),
    transform var(--motion-duration-base) var(--motion-easing-standard);
}

.card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.card h3 {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-block-end: var(--space-2);
}

.card p {
  color: var(--color-fg-secondary);
  font-size: var(--font-size-sm);
}

.card-meta {
  color: var(--color-fg-muted);
  font-size: var(--font-size-xs);
  margin-block-end: var(--space-2);
}

.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  color: var(--color-fg-secondary);
  text-decoration: none;
}

.badge:hover {
  border-color: var(--color-border-strong);
  color: var(--color-fg-primary);
}

/* ── Article ────────────────────────────────────────────────────────────── */

.article {
  margin-block: var(--space-12) var(--space-16);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
  margin-block-start: var(--space-3);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-family-display);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-block: var(--space-8) var(--space-4);
}

.prose h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
  margin-block-start: 0;
}

.prose h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}

.prose h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.prose h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.prose p,
.prose li {
  margin-block: var(--space-3);
}

.prose ul,
.prose ol {
  padding-inline-start: var(--space-6);
}

.prose blockquote {
  border-inline-start: 2px solid var(--color-border-strong);
  padding-inline-start: var(--space-4);
  color: var(--color-fg-secondary);
  margin-block: var(--space-4);
}

.prose code {
  font-family: var(--font-family-mono);
  font-size: 0.92em;
  background: var(--color-bg-sunken);
  padding: 0.15em 0.35em;
  border-radius: var(--radius-sm);
}

.prose pre {
  font-family: var(--font-family-mono);
  background: var(--color-bg-inverse);
  color: var(--color-fg-onInverse);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-block: var(--space-4);
}

.prose pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  margin-block: var(--space-4);
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  border-block-end: 1px solid var(--color-border-default);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}

.prose th {
  font-weight: var(--font-weight-semibold);
}

.prose hr {
  border: 0;
  border-block-start: 1px solid var(--color-border-subtle);
  margin-block: var(--space-8);
}

.pager {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  margin-block-start: var(--space-8);
  font-size: var(--font-size-sm);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */

.site-footer {
  margin-block-start: var(--space-16);
  padding-block: var(--space-10) var(--space-6);
  border-block-start: 1px solid var(--color-border-subtle);
  background: var(--color-bg-subtle);
  color: var(--color-fg-secondary);
  font-size: var(--font-size-sm);
}

.footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 2fr;
    align-items: start;
  }
}

.brand-block {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  max-width: 22rem;
}

.brand-block .brand-name {
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-fg-primary);
}

.brand-tag {
  color: var(--color-fg-muted);
}

.footer-nav {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 1024px) {
  .footer-nav {
    grid-template-columns: repeat(4, 1fr);
  }
}

.col h2 {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  color: var(--color-fg-muted);
  font-weight: var(--font-weight-semibold);
  margin-block-end: var(--space-3);
}

.col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.col a {
  color: var(--color-fg-secondary);
  text-decoration: none;
  display: inline-block;
  min-height: 1.5rem;
}

.col a:hover {
  color: var(--color-fg-primary);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.legal {
  margin-block-start: var(--space-8);
  padding-block-start: var(--space-4);
  border-block-start: 1px solid var(--color-border-subtle);
  color: var(--color-fg-muted);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  display: grid;
  gap: var(--space-2);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}