/* =========================================================
   Personal site — modern-minimal × Neutral Modern
   Tokens
   ========================================================= */
:root {
  /* modern-minimal palette */
  --bg:        oklch(99% 0.002 240);
  --surface:   oklch(100% 0 0);
  --fg:        oklch(18% 0.012 250);
  --muted:     oklch(54% 0.012 250);
  --border:    oklch(92% 0.005 250);
  --accent:    oklch(58% 0.18 255);   /* cobalt */
  --accent-ink: oklch(99% 0.002 240);

  /* Neutral Modern overlays */
  --success:   #17A34A;
  --warn:      #EAB308;
  --danger:    #DC2626;

  /* Type stacks */
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
                  'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text',
                  'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'IBM Plex Mono',
                  'SFMono-Regular', Menlo, monospace;

  /* Type scale */
  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-24: 24px;
  --fs-32: 32px;
  --fs-48: 48px;
  --fs-64: 64px;
  --fs-72: 72px;

  /* Layout */
  --max: 1200px;
  --gutter: 24px;
  --radius: 8px;
  --radius-lg: 12px;

  /* Elevation */
  --shadow-1: 0 2px 8px rgba(17, 17, 17, 0.08);

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
::selection { background: color-mix(in oklch, var(--accent) 22%, transparent); }

/* =========================================================
   Typography
   ========================================================= */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0;
  color: var(--fg);
}
h1 { font-size: clamp(40px, 6vw, var(--fs-72)); letter-spacing: -0.025em; }
h2 { font-size: clamp(28px, 4vw, var(--fs-48)); letter-spacing: -0.02em; }
h3 { font-size: var(--fs-24); }
h4 { font-size: var(--fs-20); }
p  { margin: 0 0 1em 0; }
small { color: var(--muted); font-size: var(--fs-14); }

code, kbd, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* =========================================================
   Layout
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section { padding: 80px 0; }
.section--tight { padding: 48px 0; }
.section--alt { background: var(--surface); border-block: 1px solid var(--border); }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1023px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 639px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
}

/* =========================================================
   Nav
   ========================================================= */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in oklch, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  font-size: var(--fs-16);
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 24px; height: 24px;
  background: var(--accent);
  border-radius: 6px;
  display: inline-grid;
  place-items: center;
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  color: var(--fg);
  font-size: var(--fs-14);
  opacity: 0.8;
}
.nav-links a.is-active,
.nav-links a:hover { opacity: 1; text-decoration: none; color: var(--accent); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--fg);
  color: var(--bg);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: var(--fs-14);
}
.nav-cta:hover { text-decoration: none; opacity: 0.92; }

@media (max-width: 639px) {
  .nav-links { display: none; }
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 48px 0 32px;
  color: var(--muted);
  font-size: var(--fs-14);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: var(--fs-14);
  font-weight: 500;
  line-height: 1;
  transition: background 120ms var(--ease), border-color 120ms var(--ease);
}
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: color-mix(in oklch, var(--accent) 88%, black); text-decoration: none; }
.btn--ghost   { background: transparent; color: var(--fg); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--fg); text-decoration: none; }

/* =========================================================
   Hero (home)
   ========================================================= */
.hero { padding: 96px 0 72px; }
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  margin-bottom: 24px;
}
.hero__eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--success) 20%, transparent);
}
.hero h1 { margin-bottom: 20px; max-width: 18ch; }
.hero__sub {
  font-size: clamp(var(--fs-16), 2.2vw, var(--fs-20));
  color: var(--muted);
  max-width: 56ch;
  margin-bottom: 32px;
}
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__meta {
  margin-top: 56px;
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}
.hero__meta div { min-width: 140px; }
.hero__meta strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-24);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.hero__meta span { font-size: var(--fs-14); color: var(--muted); }

/* =========================================================
   Card
   ========================================================= */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}
.card:hover { border-color: color-mix(in oklch, var(--accent) 35%, var(--border)); }

.card__kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}
.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin-bottom: 8px;
}
.card__title a { color: inherit; }
.card__title a:hover { color: var(--accent); text-decoration: none; }
.card__excerpt { color: var(--muted); font-size: var(--fs-14); margin-bottom: 16px; }
.card__meta {
  display: flex; gap: 12px; align-items: center;
  font-size: var(--fs-12); color: var(--muted);
  font-family: var(--font-mono);
}

/* List cards (article / product) */
.list-card {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.list-card:first-child { border-top: 1px solid var(--border); }
.list-card__no {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--muted);
  padding-top: 4px;
}
.list-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-24);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin-bottom: 6px;
}
.list-card__title a { color: var(--fg); }
.list-card__title a:hover { color: var(--accent); text-decoration: none; }
.list-card__excerpt { color: var(--muted); font-size: var(--fs-14); margin: 0; max-width: 60ch; }
.list-card__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-end;
  white-space: nowrap;
}
@media (max-width: 639px) {
  .list-card { grid-template-columns: 1fr; gap: 8px; }
  .list-card__meta { text-align: left; flex-direction: row; gap: 12px; }
}

/* =========================================================
   Tags / chips
   ========================================================= */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
}
.tag--accent {
  color: var(--accent);
  border-color: color-mix(in oklch, var(--accent) 40%, var(--border));
  background: color-mix(in oklch, var(--accent) 6%, var(--surface));
}

/* =========================================================
   Article header (post)
   ========================================================= */
.post-header { padding: 96px 0 32px; }
.post-header__meta {
  display: flex; gap: 12px; align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  margin-bottom: 16px;
}
.post-header h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  max-width: 22ch;
  margin-bottom: 16px;
}
.post-header__lede {
  font-size: clamp(var(--fs-16), 2.2vw, var(--fs-20));
  color: var(--muted);
  max-width: 64ch;
}

.post-body {
  padding: 32px 0 96px;
}
.post-body__inner {
  max-width: 720px;
  margin: 0 auto;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--fg);
}
.post-body__inner h2 {
  font-size: var(--fs-32);
  margin: 56px 0 16px;
  letter-spacing: -0.02em;
}
.post-body__inner h3 {
  font-size: var(--fs-24);
  margin: 40px 0 12px;
}
.post-body__inner p { margin: 0 0 1.4em 0; }
.post-body__inner ul,
.post-body__inner ol { padding-left: 1.4em; margin: 0 0 1.4em 0; }
.post-body__inner li { margin-bottom: 6px; }
.post-body__inner blockquote {
  border-left: 3px solid var(--accent);
  margin: 32px 0;
  padding: 4px 0 4px 20px;
  color: var(--fg);
  font-size: var(--fs-20);
  font-style: normal;
}
.post-body__inner code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
}
.post-body__inner pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
  font-size: var(--fs-14);
}
.post-body__inner pre code { background: transparent; border: 0; padding: 0; }
.post-body__inner hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* Asides / pull data */
.callout {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin: 32px 0;
}
.callout__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

/* =========================================================
   Product detail
   ========================================================= */
.product-hero { padding: 96px 0 48px; }
.product-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}
.product-hero h1 { max-width: 16ch; }
.product-hero__sub {
  color: var(--muted);
  font-size: clamp(var(--fs-16), 2vw, var(--fs-20));
  max-width: 52ch;
  margin: 16px 0 24px;
}
.product-hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.product-hero__badges {
  margin-top: 28px;
  display: flex; flex-wrap: wrap; gap: 8px;
}

.product-mock {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-1);
}
.product-mock__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 6px 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.product-mock__bar span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border);
}
.product-mock__bar span:nth-child(1) { background: #FF5F57; }
.product-mock__bar span:nth-child(2) { background: #FEBC2E; }
.product-mock__bar span:nth-child(3) { background: #28C840; }
.product-mock__title {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  padding-left: 8px;
}

.mock-row { display: grid; grid-template-columns: 200px 1fr; gap: 16px; }
.mock-side {
  border-right: 1px solid var(--border);
  padding-right: 12px;
  display: flex; flex-direction: column; gap: 6px;
}
.mock-side__item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: var(--fs-14);
  color: var(--muted);
}
.mock-side__item.is-active {
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
  color: var(--accent);
  font-weight: 500;
}
.mock-side__item .ico {
  width: 14px; height: 14px;
  background: currentColor;
  -webkit-mask: var(--m) center/contain no-repeat;
          mask: var(--m) center/contain no-repeat;
  opacity: 0.85;
}
.mock-main { padding: 4px 8px; }
.mock-main__head {
  display: flex; justify-content: space-between; align-items: end;
  margin-bottom: 12px;
}
.mock-main__head h4 {
  font-size: var(--fs-16); margin: 0;
}
.mock-main__head .mono { color: var(--muted); }

.mock-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.mock-stat {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
}
.mock-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  letter-spacing: -0.02em;
}
.mock-stat span { font-size: var(--fs-12); color: var(--muted); }

.mock-list { display: flex; flex-direction: column; gap: 6px; }
.mock-list__row {
  display: grid;
  grid-template-columns: 8px 1fr 80px 60px;
  gap: 8px;
  align-items: center;
  font-size: var(--fs-12);
  padding: 8px 4px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
}
.mock-list__row:last-child { border-bottom: 0; }
.mock-list__row .pip {
  width: 6px; height: 6px; border-radius: 50%;
}
.pip--green { background: var(--success); }
.pip--amber { background: var(--warn); }
.pip--red   { background: var(--danger); }
.mock-list__row .st {
  font-size: 10px; padding: 2px 6px; border-radius: 999px;
  text-align: center;
}
.st--ok { background: color-mix(in oklch, var(--success) 14%, var(--surface)); color: var(--success); }
.st--wr { background: color-mix(in oklch, var(--warn) 18%, var(--surface));    color: #8a6500; }
.st--rd { background: color-mix(in oklch, var(--danger) 14%, var(--surface));  color: var(--danger); }

@media (max-width: 1023px) {
  .product-hero__grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Section heading
   ========================================================= */
.section-head {
  display: flex; justify-content: space-between; align-items: end;
  gap: 24px; margin-bottom: 32px;
}
.section-head h2 { margin: 0; }
.section-head p { color: var(--muted); margin: 4px 0 0; max-width: 48ch; }
.section-head__link { font-family: var(--font-mono); font-size: var(--fs-12); color: var(--accent); white-space: nowrap; }

/* =========================================================
   Feature row (product page)
   ========================================================= */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}
.feature-row:nth-child(even) > :first-child { order: 2; }
.feature-row h3 { font-size: var(--fs-32); margin-bottom: 12px; letter-spacing: -0.02em; }
.feature-row p  { color: var(--muted); margin-bottom: 16px; }
.feature-row ul { padding-left: 0; list-style: none; }
.feature-row li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  font-size: var(--fs-14);
}
.feature-row li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 10px; height: 2px;
  background: var(--accent);
}

.feature-visual {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  min-height: 280px;
}

@media (max-width: 1023px) {
  .feature-row { grid-template-columns: 1fr; padding: 40px 0; gap: 24px; }
  .feature-row:nth-child(even) > :first-child { order: 0; }
}

/* =========================================================
   CTA strip
   ========================================================= */
.cta-strip {
  background: var(--fg);
  color: var(--bg);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-strip h3 { color: var(--bg); font-size: var(--fs-32); letter-spacing: -0.02em; }
.cta-strip p  { color: color-mix(in oklch, var(--bg) 70%, transparent); margin: 6px 0 0; }
.cta-strip .btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

/* =========================================================
   Filter row (articles)
   ========================================================= */
.filters {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.filters .tag { cursor: pointer; user-select: none; }
.filters .tag.is-active {
  color: var(--accent);
  border-color: color-mix(in oklch, var(--accent) 50%, var(--border));
  background: color-mix(in oklch, var(--accent) 8%, var(--surface));
}

/* =========================================================
   Author block (article footer)
   ========================================================= */
.author {
  margin-top: 64px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex; gap: 16px; align-items: center;
  background: var(--surface);
}
.author__avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 600;
}
.author__name { font-weight: 600; }
.author__bio  { font-size: var(--fs-14); color: var(--muted); margin: 0; }