/* ==========================================================================
   Client site template — one stylesheet, no framework.
   Customize: the color tokens and font stacks below re-skin the whole site.
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --fg: #16181d;
  --fg-muted: #5b6472;
  --border: #e4e7ec;
  --accent: #1d4ed8;
  --accent-strong: #1e3a8a;
  --accent-soft: #eff4ff;

  --maxw: 64rem;
  --narrow: 42rem;
  --radius: 10px;

  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.3125rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.6rem + 2vw, 3rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --bg-soft: #171a22;
    --fg: #e8eaef;
    --fg-muted: #9aa3b2;
    --border: #262b36;
    --accent: #7aa2ff;
    --accent-strong: #a5c0ff;
    --accent-soft: #182238;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-strong);
}

main {
  min-height: 60vh;
}

.container {
  width: min(100% - 2.5rem, var(--maxw));
  margin-inline: auto;
}

.container.narrow {
  width: min(100% - 2.5rem, var(--narrow));
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.site-nav .nav-cta {
  color: #fff;
  background: var(--accent);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta.active {
  color: #fff;
  background: var(--accent-strong);
}

@media (prefers-color-scheme: dark) {
  .site-nav .nav-cta,
  .site-nav .nav-cta:hover,
  .site-nav .nav-cta.active {
    color: #0f1117;
  }
}

/* ---------- Hero (home) ---------- */

.hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.hero h1 {
  font-size: var(--text-2xl);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 20ch;
}

.hero .lede {
  font-size: var(--text-lg);
  color: var(--fg-muted);
  margin: 0 0 1.75rem;
  max-width: 48ch;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(1.75rem, 4vw, 3rem) 0;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-head h2 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.section-head a {
  font-size: 0.95rem;
  white-space: nowrap;
}

.section-soft {
  background: var(--bg-soft);
  border-block: 1px solid var(--border);
}

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

.button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.button:hover {
  background: var(--accent-strong);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .button,
  .button:hover {
    color: #0f1117;
  }
}

.button-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

.button-ghost:hover {
  background: var(--bg-soft);
  color: var(--fg);
}

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 1.5rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

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

.card img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
  background: var(--bg-soft);
}

.card-body {
  padding: 1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.card-body h3 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.card-body p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

.card-body .tags {
  margin-top: auto;
  padding-top: 0.6rem;
}

/* ---------- Post list ---------- */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-list li {
  border-top: 1px solid var(--border);
}

.post-list li:last-child {
  border-bottom: 1px solid var(--border);
}

.post-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  padding: 1rem 0.25rem;
  text-decoration: none;
  color: var(--fg);
}

.post-list a:hover {
  color: var(--accent);
}

.post-list .post-title {
  font-weight: 600;
}

.post-list .post-desc {
  display: block;
  color: var(--fg-muted);
  font-size: 0.92rem;
  font-weight: 400;
  margin-top: 0.15rem;
}

.post-list time {
  color: var(--fg-muted);
  font-size: 0.88rem;
  white-space: nowrap;
}

/* ---------- Page headers / meta ---------- */

.page-header {
  padding: clamp(2.5rem, 6vw, 4rem) 0 1.5rem;
}

.page-header h1 {
  margin: 0 0 0.5rem;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.lede {
  font-size: var(--text-lg);
  color: var(--fg-muted);
  margin: 0;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.eyebrow a {
  color: var(--fg-muted);
  text-decoration: none;
}

.meta {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  color: var(--fg-muted);
  font-size: 0.9rem;
  margin: 0.75rem 0 0;
}

.tag {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.8rem;
}

@media (prefers-color-scheme: dark) {
  .tag {
    color: var(--accent);
  }
}

.post-cover {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 0.5rem 0 1.5rem;
}

.post-footer {
  margin: 2.5rem 0 3rem;
}

/* ---------- Prose ---------- */

.prose {
  padding-bottom: 1rem;
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h2 {
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin-top: 2em;
}

.prose h3 {
  font-size: 1.1rem;
  margin-top: 1.6em;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
}

.prose blockquote {
  border-left: 3px solid var(--accent);
  margin-left: 0;
  padding: 0.2em 0 0.2em 1em;
  color: var(--fg-muted);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

.prose pre {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.88rem;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
}

.prose img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ---------- Forms ---------- */

.form {
  display: grid;
  gap: 1.1rem;
  max-width: 34rem;
  margin: 0 0 2.5rem;
}

.form-field {
  display: grid;
  gap: 0.35rem;
}

.form-field label {
  font-weight: 600;
  font-size: 0.92rem;
}

.form-field .hint {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.form input,
.form select,
.form textarea {
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  width: 100%;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.form textarea {
  min-height: 9rem;
  resize: vertical;
}

/* Off-screen honeypot — never display:none (bots skip those) */
.form .hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.form .button {
  justify-self: start;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.form-note {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

/* ---------- CTA band ---------- */

.cta-band {
  text-align: center;
  padding: clamp(2.5rem, 6vw, 4rem) 1.25rem;
}

.cta-band h2 {
  margin: 0 0 0.5rem;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
}

.cta-band p {
  color: var(--fg-muted);
  margin: 0 0 1.25rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 1.75rem 0 2.25rem;
  font-size: 0.88rem;
  color: var(--fg-muted);
}

.footer-inner {
  display: grid;
  gap: 0.4rem;
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--fg-muted);
}

.credit a {
  color: var(--fg-muted);
}

/* ---------- Thanks / 404 ---------- */

.state-page {
  text-align: center;
  padding: clamp(4rem, 12vw, 7rem) 1.25rem;
}

.state-page h1 {
  font-size: var(--text-xl);
  margin: 0 0 0.5rem;
}

.state-page p {
  color: var(--fg-muted);
}

/* ---------- Utilities ---------- */

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