:root {
  --bg: #f3eef6;
  --ink: #10131a;
  --muted: #5f6574;
  --card: #ffffff;
  --line: rgba(20, 26, 40, 0.09);
  --blue: #2f7dff;
  --cyan: #3dd8ff;
  --teal: #16c2a4;
  --rose: #ff4b82;
  --dark: #070d1a;
  --header-bg: rgba(255, 255, 255, 0.72);
  --header-border: rgba(17, 24, 39, 0.1);
  --chip-bg: rgba(255, 255, 255, 0.78);
  --chip-ink: #3f4654;
  --soft: rgba(255, 255, 255, 0.66);
  --btn-primary-bg: #111827;
  --btn-primary-ink: #ffffff;
  --btn-light-bg: rgba(255, 255, 255, 0.84);
  --btn-light-ink: #171a22;
  --callout-bg: rgba(47, 125, 255, 0.08);
  --callout-border: rgba(47, 125, 255, 0.22);
  --callout-ink: #2a4b86;
  --ok-bg: rgba(22, 194, 164, 0.1);
  --ok-border: rgba(22, 194, 164, 0.28);
  --ok-ink: #0f6f5f;
}

html {
  color-scheme: light dark;
}

html[data-theme='dark'] {
  --bg: #070d1a;
  --ink: rgba(245, 248, 255, 0.94);
  --muted: rgba(184, 195, 216, 0.85);
  --card: rgba(14, 22, 40, 0.82);
  --line: rgba(231, 237, 255, 0.11);
  --header-bg: rgba(7, 13, 26, 0.62);
  --header-border: rgba(231, 237, 255, 0.12);
  --chip-bg: rgba(15, 22, 38, 0.65);
  --chip-ink: rgba(222, 231, 248, 0.9);
  --soft: rgba(12, 18, 32, 0.62);
  --btn-primary-bg: rgba(245, 248, 255, 0.92);
  --btn-primary-ink: #07101f;
  --btn-light-bg: rgba(7, 13, 26, 0.32);
  --btn-light-ink: rgba(232, 238, 251, 0.92);
  --callout-bg: rgba(47, 125, 255, 0.14);
  --callout-border: rgba(61, 216, 255, 0.28);
  --callout-ink: rgba(196, 218, 255, 0.95);
  --ok-bg: rgba(22, 194, 164, 0.14);
  --ok-border: rgba(22, 194, 164, 0.32);
  --ok-ink: rgba(170, 245, 228, 0.95);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Archivo', sans-serif;
  scroll-behavior: smooth;
}

.mono {
  font-family: 'IBM Plex Mono', monospace;
}

.shell {
  width: min(1180px, 100% - 28px);
  margin: 0 auto;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: 0.11;
  pointer-events: none;
  background-image: radial-gradient(circle at 20% 20%, #000 0.4px, transparent 0.4px);
  background-size: 2px 2px;
}

.gradient-surface {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(circle at 18% 8%, rgba(255, 162, 209, 0.27), transparent 36%),
    radial-gradient(circle at 82% 16%, rgba(159, 198, 255, 0.32), transparent 33%),
    linear-gradient(180deg, #f5f0f7, #f1eef8 42%, #eef4fc 100%);
}

html[data-theme='dark'] .gradient-surface {
  background:
    radial-gradient(circle at 16% 14%, rgba(61, 216, 255, 0.17), transparent 40%),
    radial-gradient(circle at 86% 18%, rgba(255, 75, 130, 0.12), transparent 42%),
    radial-gradient(circle at 78% 80%, rgba(22, 194, 164, 0.12), transparent 45%),
    linear-gradient(180deg, #060b16, #070d1a 52%, #070e1f 100%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}

.site-logo {
  height: 34px;
  width: auto;
}

html[data-theme='dark'] .site-logo {
  filter: brightness(1.08);
}

.footer-logo {
  filter: none;
}

html[data-theme='dark'] .footer-logo {
  filter: brightness(1.08);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--chip-bg);
  padding: 6px 12px;
  font-size: 12px;
  color: var(--chip-ink);
  text-decoration: none;
}

.chip-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  flex: 0 0 14px;
}

.theme-toggle {
  cursor: pointer;
}

.theme-toggle svg {
  width: 14px;
  height: 14px;
  display: none;
}

html[data-theme='light'] .theme-toggle .icon-sun,
html[data-theme='dark'] .theme-toggle .icon-moon {
  display: block;
}

.theme-toggle .theme-text {
  font-size: 12px;
}

.header-cta {
  color: var(--btn-primary-ink);
  background: var(--btn-primary-bg);
  border: 1px solid var(--btn-primary-bg);
  text-decoration: none;
}

.header-cta:hover {
  filter: brightness(1.06);
}

.btn {
  height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  color: var(--btn-primary-ink);
  background: var(--btn-primary-bg);
  border-color: var(--btn-primary-bg);
}

.btn-light {
  color: var(--btn-light-ink);
  border-color: var(--line);
  background: var(--btn-light-bg);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  margin-top: 3rem;
  background: var(--soft);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--ink);
}

.page-hero {
  padding: 4.5rem 0 2rem;
  text-align: center;
}

.page-hero .micro {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-hero h1 {
  margin: 14px auto 0;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.page-hero p {
  margin: 14px auto 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 1.05rem;
}

.panel {
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 1.75rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 16px 34px rgba(13, 18, 30, 0.06);
}

html[data-theme='dark'] .panel {
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.panel p,
.panel li {
  color: var(--muted);
  line-height: 1.65;
}

.panel a {
  color: var(--blue);
}

.callout {
  border-radius: 12px;
  border: 1px solid var(--callout-border);
  background: var(--callout-bg);
  color: var(--callout-ink);
  padding: 1rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.callout.ok {
  border-color: var(--ok-border);
  background: var(--ok-bg);
  color: var(--ok-ink);
}

.blog-list {
  display: grid;
  gap: 1rem;
  padding-bottom: 2rem;
}

.blog-card h2 {
  margin: 0.35rem 0 0.75rem;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  letter-spacing: -0.02em;
}

.blog-card h2 a {
  color: var(--ink);
  text-decoration: none;
}

.blog-card h2 a:hover {
  color: var(--blue);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.25rem;
}

.meta-row .chip {
  font-weight: 600;
}

.meta-date {
  color: var(--muted);
  font-size: 0.85rem;
}

.prose-page {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 2rem;
}

.prose-page ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.prose-page li {
  margin-bottom: 0.4rem;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

.article-body h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.article-body p,
.article-body li {
  color: var(--muted);
  line-height: 1.7;
}

.article-body a {
  color: var(--blue);
}

.article-body pre,
.article-body code {
  font-family: 'IBM Plex Mono', monospace;
}

.article-body pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  padding: 1rem;
  font-size: 0.85rem;
}