@import "tailwindcss";
@import "./tokens.css";

/* ---- Base ---------------------------------------------------------------- */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Offset for the sticky nav when jumping to #sections */
  scroll-padding-top: 5rem;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
  border-radius: 4px;
}

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

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

/* ---- Layout helpers ------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-9);
  position: relative;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead {
  font-size: var(--step-1);
  color: var(--text-dim);
  line-height: 1.6;
}

.mono {
  font-family: var(--font-mono);
}

/* ---- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.02em;
  padding: 0.7rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease),
    background 0.2s var(--ease), color 0.2s var(--ease);
  text-decoration: none;
}
.btn:hover {
  text-decoration: none;
  border-color: var(--accent-line);
  transform: translateY(-1px);
}
.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
  font-weight: 600;
}
.btn--primary:hover {
  background: var(--accent-strong);
}

/* ---- Cards / tags -------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.card:hover {
  border-color: var(--accent-line);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* ---- Prose (rendered markdown) ------------------------------------------ */
.prose {
  color: var(--text-dim);
  font-size: var(--step-0);
  line-height: 1.75;
  max-width: 70ch;
}
.prose > * + * {
  margin-top: var(--space-4);
}
.prose h2 {
  color: var(--text);
  font-size: var(--step-2);
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}
.prose h2::before {
  content: "# ";
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 400;
}
.prose h3 {
  color: var(--text);
  font-size: var(--step-1);
  margin-top: var(--space-6);
}
.prose strong {
  color: var(--text);
  font-weight: 600;
}
.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose ul,
.prose ol {
  padding-left: 1.3rem;
  display: grid;
  gap: 0.4rem;
}
.prose li::marker {
  color: var(--accent);
}
.prose blockquote {
  border-left: 2px solid var(--accent);
  padding-left: var(--space-4);
  color: var(--text);
  font-style: italic;
}
.prose code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1rem 0.4rem;
}
.prose pre {
  background: var(--surface) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}
.prose pre code {
  font-family: var(--font-mono);
}

/* Shiki dual-theme: dark is the default (dark-first / JS-off safe);
   light overrides when the theme is light. We keep our own <pre> background. */
.astro-code,
.astro-code span {
  color: var(--shiki-dark);
}
[data-theme="light"] .astro-code,
[data-theme="light"] .astro-code span {
  color: var(--shiki-light);
}

/* ---- Reveal-on-scroll (progressive enhancement) -------------------------- */
/* Default = visible (JS-off safe). The .reveal class is only added by JS when
   IntersectionObserver is supported AND motion is allowed. */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}