/*
  NSK — Nagashree Srinivas Karanam
  Shared stylesheet. Vanilla CSS3, no build step, no framework.
  Palette: black (#000) and white (#fff) only, plus opacity-based
  neutrals for secondary text, borders and disabled states.
*/

/* ---------------------------------------------------------------
   1. Reset & base
------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; border-radius: 0 !important; }

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.94rem + 0.2vw, 1.125rem);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
img { font-style: italic; } /* alt text styling if image fails */

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
address { font-style: normal; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------------------------------------------------------------
   2. Design tokens
------------------------------------------------------------------ */
:root {
  --black: #000000;
  --white: #ffffff;

  /* ink = black-based neutrals, used on white/light backgrounds */
  --ink-1: #000000;                 /* primary text */
  --ink-2: rgba(0, 0, 0, 0.68);     /* secondary text (AA safe) */
  --ink-3: rgba(0, 0, 0, 0.46);     /* meta / captions / large text only */
  --ink-border-strong: #000000;     /* structural rules */
  --ink-border: rgba(0, 0, 0, 0.18);/* standard borders */
  --ink-border-soft: rgba(0, 0, 0, 0.10); /* faint dividers */
  --ink-disabled: rgba(0, 0, 0, 0.30);
  --ink-wash: rgba(0, 0, 0, 0.04);  /* faint fill, e.g. disabled inputs */

  /* paper = white-based neutrals, used on black backgrounds */
  --paper-1: #ffffff;
  --paper-2: rgba(255, 255, 255, 0.74);
  --paper-3: rgba(255, 255, 255, 0.50);
  --paper-border-strong: #ffffff;
  --paper-border: rgba(255, 255, 255, 0.28);
  --paper-border-soft: rgba(255, 255, 255, 0.16);
  --paper-disabled: rgba(255, 255, 255, 0.34);
  --paper-wash: rgba(255, 255, 255, 0.06);

  --max: 1200px;
  --gutter: clamp(20px, 5vw, 64px);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

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

  --dur: 180ms;
  --ease: ease;
}

/* ---------------------------------------------------------------
   3. Layout primitives
------------------------------------------------------------------ */
.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { display: block; }

.section {
  padding-block: clamp(3rem, 3rem + 3vw, 6rem);
}
.section--tight { padding-block: clamp(2rem, 2rem + 2vw, 3.5rem); }
.section--dark { background: var(--black); color: var(--paper-1); }
.section--top-rule { border-top: 1px solid var(--ink-border-strong); }
.section--dark.section--top-rule { border-top: 1px solid var(--paper-border-strong); }

.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--paper-1); }
.section--dark .muted { color: var(--paper-2); }
.section--dark .muted-2 { color: var(--paper-3); }
.section--dark a { color: var(--paper-1); }
.section--dark .rule { border-color: var(--paper-border-strong); }
.section--dark .eyebrow { color: var(--paper-2); }

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

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-asym-2-1, .grid-asym-1-2, .grid-asym-3-2 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.rule {
  border: none;
  border-top: 1px solid var(--ink-border-strong);
  margin-block: var(--space-5);
}
.rule--soft { border-top: 1px solid var(--ink-border); }

/* ---------------------------------------------------------------
   4. Typography
------------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.5rem, 1.9rem + 3vw, 4.5rem); }
h2 { font-size: clamp(1.9rem, 1.55rem + 1.8vw, 3rem); }
h3 { font-size: clamp(1.4rem, 1.22rem + 0.9vw, 1.9rem); }
h4 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem); }

p { max-width: 68ch; }
p + p { margin-top: var(--space-3); }
.no-max { max-width: none; }

.lede {
  font-size: clamp(1.15rem, 1.02rem + 0.6vw, 1.5rem);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 56ch;
}
.section--dark .lede { color: var(--paper-2); }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: var(--space-2);
}

.muted { color: var(--ink-2); }
.muted-2 { color: var(--ink-3); }

.h-display {
  font-size: clamp(2.75rem, 1.9rem + 4.2vw, 6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-wrap: balance;
}

.text-xl { font-size: clamp(1.25rem, 1.1rem + 0.7vw, 1.65rem); line-height: 1.4; }
.text-small { font-size: 0.9rem; }
.text-mono { font-family: var(--font-mono); }
.text-center { text-align: center; }
.nowrap { white-space: nowrap; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------
   5. Links & focus states
------------------------------------------------------------------ */
.link-underline {
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  transition: opacity var(--dur) var(--ease);
}
.link-underline:hover { opacity: 0.6; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 600;
  border-bottom: 1px solid var(--ink-border-strong);
  padding-bottom: 0.15em;
  transition: gap var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.link-arrow:hover { gap: 0.7em; opacity: 0.75; }
.section--dark .link-arrow { border-color: var(--paper-border-strong); }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--black);
  outline-offset: 3px;
}
.section--dark a:focus-visible,
.section--dark button:focus-visible,
.section--dark summary:focus-visible {
  outline-color: var(--white);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-2);
  background: var(--black);
  color: var(--white);
  padding: 0.75em 1.25em;
  z-index: 200;
  transition: top var(--dur) var(--ease);
  font-weight: 600;
}
.skip-link:focus { top: var(--space-2); }

/* ---------------------------------------------------------------
   6. Buttons
------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.95em 1.6em;
  border: 1px solid var(--black);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  cursor: pointer;
}

.btn--primary { background: var(--black); color: var(--white); }
.btn--primary:hover { background: var(--white); color: var(--black); }

.btn--outline { background: transparent; color: var(--black); border-color: var(--black); }
.btn--outline:hover { background: var(--black); color: var(--white); }

.section--dark .btn--primary { background: var(--white); color: var(--black); border-color: var(--white); }
.section--dark .btn--primary:hover { background: transparent; color: var(--white); }

.section--dark .btn--outline { color: var(--white); border-color: var(--white); background: transparent; }
.section--dark .btn--outline:hover { background: var(--white); color: var(--black); }

.btn--full { width: 100%; justify-content: center; }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

/* ---------------------------------------------------------------
   7. Header & navigation
------------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--ink-border-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: clamp(64px, 5vw + 48px, 84px);
}

.logo-link { display: inline-flex; align-items: center; flex-shrink: 0; }
.logo-img { width: clamp(96px, 6vw + 70px, 132px); height: auto; }

.site-nav { display: flex; align-items: center; }

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

.nav-menu a:not(.nav-cta) {
  font-weight: 500;
  padding-block: 0.35em;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}
.nav-menu a:not(.nav-cta):hover,
.nav-menu a:not(.nav-cta)[aria-current="page"] {
  border-bottom-color: var(--black);
}

.nav-cta {
  border: 1px solid var(--black);
  padding: 0.55em 1.1em;
  font-weight: 600;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-cta:hover { background: var(--black); color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--black);
}
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--black);
  margin-inline: auto;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .site-nav { position: relative; }
  .nav-menu {
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--gutter) var(--space-6);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
    overflow-y: auto;
  }
  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .nav-menu li { border-bottom: 1px solid var(--ink-border-soft); }
  .nav-menu a:not(.nav-cta) { display: block; padding: 1.1em 0; font-size: 1.15rem; border-bottom: none; }
  .nav-menu a:not(.nav-cta)[aria-current="page"] { font-weight: 700; }
  .nav-cta { display: block; text-align: center; margin-top: var(--space-3); }
}

/* ---------------------------------------------------------------
   8. Breadcrumbs
------------------------------------------------------------------ */
.breadcrumbs {
  padding-block: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.4em; align-items: center; }
.breadcrumbs a { color: var(--ink-2); text-decoration: underline; text-underline-offset: 0.2em; }
.breadcrumbs a:hover { color: var(--ink-1); }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 0.4em; color: var(--ink-3); }
.breadcrumbs li[aria-current="page"] { color: var(--ink-3); }

/* ---------------------------------------------------------------
   9. Hero
------------------------------------------------------------------ */
.hero { padding-block: clamp(3rem, 3rem + 5vw, 7rem) clamp(2.5rem, 2.5rem + 3vw, 5rem); }
.hero .eyebrow { margin-bottom: var(--space-3); }
.hero h1 { max-width: 100%; font-size: clamp(2.25rem, 1.5rem + 2.4vw, 3.5rem); }
.hero h1 br { content: ""; }
.hero .lede { margin-top: var(--space-4); }
.hero .btn-row { margin-top: var(--space-5); }
.hero-note {
  margin-top: var(--space-4);
  font-size: 0.9rem;
  color: var(--ink-3);
  max-width: 46ch;
}

/* ---------------------------------------------------------------
   10. Proof strip / metrics
------------------------------------------------------------------ */
.proof-strip { border-top: 1px solid var(--ink-border-strong); border-bottom: 1px solid var(--ink-border-strong); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.metric {
  padding: var(--space-4) var(--space-3);
  border-left: 1px solid var(--ink-border);
}
.metric:first-child { border-left: none; }
.metric-value {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.3em;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 1.1rem + 1.3vw, 2.1rem);
  font-variant-numeric: tabular-nums;
}
.metric-value .arrow { font-size: 0.6em; color: var(--ink-3); font-weight: 400; }
.metric-label { margin-top: 0.5em; color: var(--ink-2); font-size: 0.9rem; }

@media (max-width: 900px) {
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(2n+1) { border-left: none; }
  .metric:nth-child(n+3) { border-top: 1px solid var(--ink-border); }
}
@media (max-width: 520px) {
  .proof-grid { grid-template-columns: 1fr; }
  .metric { border-left: none !important; border-top: 1px solid var(--ink-border); }
  .metric:first-child { border-top: none; }
}

/* ---------------------------------------------------------------
   11. Numbered fix / feature blocks
------------------------------------------------------------------ */
.fix-block {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-4);
  padding-block: var(--space-5);
  border-top: 1px solid var(--ink-border-strong);
}
.fix-block:last-child { border-bottom: 1px solid var(--ink-border-strong); }
.fix-num { font-family: var(--font-mono); font-size: 1rem; color: var(--ink-3); padding-top: 0.3em; }
.fix-tag { font-family: var(--font-mono); font-size: 0.8125rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-1); border: 1px solid var(--ink-border-strong); display: inline-block; padding: 0.25em 0.6em; margin-top: var(--space-2); }
.fix-block h3 { max-width: 22ch; }
.fix-block p { margin-top: var(--space-2); }

@media (max-width: 640px) {
  .fix-block { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* ---------------------------------------------------------------
   12. Industry / work / note / build cards
------------------------------------------------------------------ */
.card-grid { display: grid; gap: 1px; background: var(--ink-border-strong); border: 1px solid var(--ink-border-strong); }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid.cols-2, .card-grid.cols-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--white);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.card-link { display: block; height: 100%; }
a.card:hover, .card-link:hover .card { background: var(--black); color: var(--white); }
a.card:hover .muted, .card-link:hover .card .muted { color: var(--paper-2); }
a.card:hover .eyebrow, .card-link:hover .card .eyebrow { color: var(--paper-2); }
a.card:hover .fix-tag, .card-link:hover .card .fix-tag { border-color: var(--white); }

.card .eyebrow { margin-bottom: var(--space-2); }
.card h3 { margin-bottom: var(--space-2); }
.card p { margin-top: 0; }
.card-foot { margin-top: auto; padding-top: var(--space-3); font-weight: 600; }

/* ---------------------------------------------------------------
   13. Steps (how I work)
------------------------------------------------------------------ */
.steps { counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: 1px solid var(--ink-border);
}
.step:last-child { border-bottom: 1px solid var(--ink-border); }
.step-num { font-family: var(--font-mono); font-size: 1.5rem; color: var(--ink-3); }
@media (max-width: 640px) { .step { grid-template-columns: 1fr; gap: var(--space-1); } }

/* ---------------------------------------------------------------
   14. CTA block
------------------------------------------------------------------ */
.cta-block { text-align: left; }
.cta-block h2 { max-width: 16ch; }
.cta-block .lede { margin-top: var(--space-3); color: var(--paper-2); max-width: 50ch; }
.cta-block .btn-row { margin-top: var(--space-5); }

/* ---------------------------------------------------------------
   15. Timeline
------------------------------------------------------------------ */
.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-top: 1px solid var(--ink-border);
}
.timeline-item:last-child { border-bottom: 1px solid var(--ink-border); }
.timeline-date { font-family: var(--font-mono); font-size: 0.875rem; color: var(--ink-3); }
.timeline-item h3 { font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.35rem); }
.timeline-role { color: var(--ink-2); margin-top: 0.2em; font-weight: 500; }
@media (max-width: 700px) { .timeline-item { grid-template-columns: 1fr; gap: var(--space-1); } }

/* ---------------------------------------------------------------
   16. Principles list
------------------------------------------------------------------ */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--ink-border-strong); border: 1px solid var(--ink-border-strong); }
.principle { background: var(--white); padding: var(--space-4); font-size: clamp(1.05rem, 1rem + 0.3vw, 1.25rem); font-weight: 600; line-height: 1.35; }
@media (max-width: 700px) { .principles { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------
   17. Case study structure
------------------------------------------------------------------ */
.case-meta { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); margin-top: var(--space-4); }
.case-meta-item { font-size: 0.875rem; }
.case-meta-item span { display: block; color: var(--ink-3); font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.25em; }

.case-section { padding-block: var(--space-5); border-top: 1px solid var(--ink-border-strong); }
.case-section .eyebrow { display: flex; align-items: center; gap: 0.6em; }
.case-section .eyebrow .n { font-size: 1rem; }
.case-section h2 { max-width: 30ch; }
.case-section .lede { margin-top: var(--space-2); }
.case-body { margin-top: var(--space-3); max-width: 68ch; }
.case-body p + p { margin-top: var(--space-2); }
.case-body ul { margin-top: var(--space-2); }
.case-body li { position: relative; padding-left: 1.4em; margin-top: 0.6em; max-width: 62ch; }
.case-body li::before { content: "—"; position: absolute; left: 0; color: var(--ink-3); }

.disclosure-note {
  border: 1px solid var(--ink-border-strong);
  padding: var(--space-3);
  font-size: 0.9rem;
  color: var(--ink-2);
  margin-top: var(--space-4);
}

/* ---------------------------------------------------------------
   18. Offers / pricing
------------------------------------------------------------------ */
.offer-card {
  border: 1px solid var(--ink-border-strong);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.offer-price { font-family: var(--font-mono); font-size: clamp(1.6rem, 1.4rem + 1vw, 2.2rem); font-weight: 700; margin-top: var(--space-2); }
.offer-timeline { color: var(--ink-2); margin-top: 0.3em; font-size: 0.9rem; }
.offer-card ul { margin-top: var(--space-3); }
.offer-card li { position: relative; padding-left: 1.3em; margin-top: 0.55em; font-size: 0.95rem; }
.offer-card li::before { content: "+"; position: absolute; left: 0; color: var(--ink-3); font-family: var(--font-mono); }
.offer-card .card-foot { margin-top: var(--space-4); }

.offer-detail { padding-block: var(--space-6); border-top: 1px solid var(--ink-border-strong); }
.offer-detail:last-of-type { border-bottom: 1px solid var(--ink-border-strong); }
.offer-detail-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--space-3); }
.offer-detail-head .offer-price { margin-top: 0; }

.included-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin-top: var(--space-4); }
.included-grid h4 { margin-bottom: var(--space-2); }
.included-grid ul li { position: relative; padding-left: 1.3em; margin-top: 0.5em; }
.included-grid ul li::before { position: absolute; left: 0; font-family: var(--font-mono); color: var(--ink-3); }
.included-grid .included li::before { content: "+"; }
.included-grid .excluded li::before { content: "–"; }
@media (max-width: 700px) { .included-grid { grid-template-columns: 1fr; gap: var(--space-3); } }

.offer-provide { margin-top: var(--space-4); padding: var(--space-3); border: 1px dashed var(--ink-border-strong); font-size: 0.95rem; }

/* ---------------------------------------------------------------
   19. Builds
------------------------------------------------------------------ */
.build-status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--ink-border-strong);
  padding: 0.25em 0.6em;
}
.modeled-target {
  border: 1px solid var(--ink-border-strong);
  padding: var(--space-3);
  margin-top: var(--space-3);
}
.modeled-target .eyebrow { margin-bottom: var(--space-1); }
.modeled-target ul { margin-top: var(--space-2); }
.modeled-target li { position: relative; padding-left: 1.3em; margin-top: 0.4em; font-size: 0.95rem; }
.modeled-target li::before { content: "→"; position: absolute; left: 0; color: var(--ink-3); }

.build-block { padding-block: var(--space-6); border-top: 1px solid var(--ink-border-strong); }
.build-block:last-of-type { border-bottom: 1px solid var(--ink-border-strong); }
.build-screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin-top: var(--space-3); }
.build-screen { border: 1px solid var(--ink-border); padding: var(--space-3); font-size: 0.9rem; }
.build-screen strong { display: block; margin-bottom: 0.3em; }
@media (max-width: 700px) { .build-screens { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .build-screens { grid-template-columns: 1fr; } }

.disclosure-banner {
  border: 1px solid var(--ink-border-strong);
  padding: var(--space-3) var(--space-4);
  font-size: 0.9rem;
  color: var(--ink-2);
}

/* ---------------------------------------------------------------
   20. FAQ (native details/summary — no JS)
------------------------------------------------------------------ */
.faq-item { border-top: 1px solid var(--ink-border-strong); }
.faq-item:last-child { border-bottom: 1px solid var(--ink-border-strong); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding-block: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  font-size: clamp(1.02rem, 1rem + 0.2vw, 1.15rem);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer { padding-bottom: var(--space-3); max-width: 64ch; color: var(--ink-2); }

/* ---------------------------------------------------------------
   21. Notes / article
------------------------------------------------------------------ */
.note-card .eyebrow { display: flex; gap: var(--space-2); }
.article-header { padding-block: clamp(2.5rem, 2.5rem + 3vw, 5rem) var(--space-4); }
.article-meta {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  font-family: var(--font-mono); font-size: 0.8125rem; color: var(--ink-3);
  margin-top: var(--space-3);
}
.article-body { max-width: 72ch; }
.article-body h2 { margin-top: var(--space-6); margin-bottom: var(--space-2); font-size: clamp(1.4rem, 1.3rem + 0.6vw, 1.8rem); }
.article-body p { margin-top: var(--space-3); }
.article-body ul, .article-body ol { margin-top: var(--space-3); }
.article-body li { position: relative; padding-left: 1.4em; margin-top: 0.6em; }
.article-body li::before { content: "—"; position: absolute; left: 0; color: var(--ink-3); }
.article-body blockquote { border-left: 3px solid var(--black); padding-left: var(--space-3); margin-top: var(--space-3); font-size: 1.15rem; font-weight: 600; max-width: 60ch; }
.article-cta { margin-top: var(--space-6); padding: var(--space-4); border: 1px solid var(--ink-border-strong); }
.article-share { margin-top: var(--space-6); }

/* ---------------------------------------------------------------
   22. Forms
------------------------------------------------------------------ */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3) var(--space-4); }
.field { display: flex; flex-direction: column; gap: 0.5em; }
.field--full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: 0.9rem; }
.field .optional { font-weight: 400; color: var(--ink-3); }
.field input,
.field select,
.field textarea {
  border: 1px solid var(--ink-border-strong);
  padding: 0.85em 1em;
  background: var(--white);
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--black) 50%), linear-gradient(135deg, var(--black) 50%, transparent 50%);
  background-position: calc(100% - 20px) center, calc(100% - 14px) center;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.5em;
}
.field textarea { resize: vertical; min-height: 8em; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 3px solid var(--black); outline-offset: 1px; }
.field-hint { font-size: 0.8125rem; color: var(--ink-3); }
.field-error { font-size: 0.8125rem; color: var(--ink-1); font-weight: 600; display: none; }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-width: 2px; }
.field.has-error .field-error { display: block; }

.field-checkbox { flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: 0.75em; }
.field-checkbox input { width: 1.2em; height: 1.2em; flex-shrink: 0; margin-top: 0.2em; border: 1px solid var(--black); }
.field-checkbox label { font-weight: 400; font-size: 0.9rem; }
.field-checkbox .field-error { flex-basis: 100%; margin-left: calc(1.2em + 0.75em); }

.field fieldset { border: none; padding: 0; margin: 0; min-width: 0; }
.field legend { font-weight: 600; font-size: 0.9rem; padding: 0; margin-bottom: var(--space-2); float: none; width: auto; }

.form-status {
  margin-top: var(--space-3);
  font-weight: 600;
  min-height: 1.5em;
}
.form-status[data-state="error"] { color: var(--ink-1); }

@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------
   23. Footer
------------------------------------------------------------------ */
.site-footer { border-top: 1px solid var(--ink-border-strong); padding-block: var(--space-6) var(--space-5); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-4); }
.footer-brand .logo-img { width: 108px; }
.footer-brand p { margin-top: var(--space-3); color: var(--ink-2); max-width: 32ch; }
.footer-col h2 { font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); font-weight: 600; margin-bottom: var(--space-2); }
.footer-col ul li { margin-top: 0.6em; }
.footer-col a { color: var(--ink-2); }
.footer-col a:hover { color: var(--ink-1); text-decoration: underline; }
.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: 1px solid var(--ink-border-soft);
  display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4);
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--ink-3);
}
.footer-bottom a { color: var(--ink-3); text-decoration: underline; }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-4); }
}

/* ---------------------------------------------------------------
   24. Utility spacing
------------------------------------------------------------------ */
.max-w-card { max-width: 560px; }

.mt-1 { margin-top: var(--space-1); } .mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); } .mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); } .mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); } .mb-3 { margin-bottom: var(--space-3); }

/* ---------------------------------------------------------------
   25. 404 page
------------------------------------------------------------------ */
.error-page { padding-block: clamp(4rem, 6vw + 2rem, 9rem); text-align: left; }
.error-code { font-family: var(--font-mono); font-size: clamp(4rem, 3rem + 6vw, 9rem); font-weight: 700; line-height: 1; }

/* ---------------------------------------------------------------
   26. Misc
------------------------------------------------------------------ */
.hidden-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
::selection { background: var(--black); color: var(--white); }
.section--dark ::selection { background: var(--white); color: var(--black); }