/* architectzero.tech: one stylesheet, system fonts only; brand tokens mirror apps/web/src/styles.css. */

:root {
  color-scheme: light dark;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;

  --ground: #f6f8fc;
  --surface: #ffffff;
  --surface-2: #eef1f8;
  --line: #dde2ed;
  --ink: #141a24;
  --ink-muted: #4f596b;
  --iris: #565de0;
  --iris-ink: #4148c9;
  --iris-wash: rgba(86, 93, 224, 0.09);
  --on-iris: #ffffff;
  --high: #b4530a;
  --low: #0d7a55;
  --band-ink: #eef1f8;
  --band-ground: #141a24;
  --band-muted: #b7bfd0;
  --band-accent: #aeb3ff;

  --radius: 8px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --measure: 66ch;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0a0d13;
    --surface: #10141d;
    --surface-2: #161c28;
    --line: #262f41;
    --ink: #e6eaf3;
    --ink-muted: #a3acc0;
    --iris: #7c83ff;
    --iris-ink: #b3b8ff;
    --iris-wash: rgba(124, 131, 255, 0.12);
    --on-iris: #0a0d13;
    --high: #ff9a4d;
    --low: #46d29a;
    --band-ink: #0a0d13;
    --band-ground: #c9ccff;
    --band-muted: #2e3350;
    --band-accent: #2d33a6;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  line-height: 1.15;
  text-wrap: balance;
  margin: 0;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: var(--iris-ink);
  text-underline-offset: 0.2em;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--iris);
  color: var(--on-iris);
  border-radius: var(--radius);
  font-weight: 600;
}

.skip:focus {
  top: 1rem;
}

/* header */

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

@supports (backdrop-filter: blur(1px)) {
  .site-header {
    backdrop-filter: saturate(1.4) blur(10px);
  }
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.mark {
  width: 1.6rem;
  height: 1.6rem;
  color: var(--iris);
  flex: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
}

.nav a {
  color: var(--ink-muted);
  text-decoration: none;
  padding-block: 0.5rem;
}

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

/* buttons */

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

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 160ms var(--ease-out), color 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

.btn-primary {
  background: var(--iris);
  color: var(--on-iris);
  border: 1px solid var(--iris);
}

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

.btn-quiet {
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--surface);
}

.btn-quiet:hover {
  border-color: var(--ink-muted);
}

/* hero */

.hero {
  padding-block: clamp(3rem, 8vw, 6.5rem) clamp(3rem, 7vw, 5.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.35rem, 1.3rem + 4.2vw, 4.25rem);
  font-weight: 750;
  letter-spacing: -0.028em;
  max-width: 15ch;
}

.lede {
  margin-top: 1.5rem;
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.4rem);
  line-height: 1.5;
  max-width: 34ch;
}

.hero-sub {
  margin-top: 1rem;
  color: var(--ink-muted);
  max-width: 46ch;
}

.hero .actions {
  margin-top: 2.25rem;
}

/* the finding illustration */

.finding {
  margin: 0;
}

.finding-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.5rem;
  font-size: 0.95rem;
  box-shadow: 0 1px 2px rgba(10, 13, 19, 0.06), 0 8px 8px -8px rgba(10, 13, 19, 0.08);
  animation: rise 700ms var(--ease-out) both;
}

.finding-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.sev {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-weight: 600;
}

.sev-was {
  color: var(--high);
  text-decoration-thickness: 2px;
  animation: strike 500ms 650ms var(--ease-out) both;
}

.sev-arrow {
  color: var(--ink-muted);
}

.sev-now {
  color: var(--low);
  animation: settle 500ms 900ms var(--ease-out) both;
}

.finding-kind {
  color: var(--ink-muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

.finding-title {
  margin-top: 1rem;
  font-size: 1.1rem;
  font-weight: 650;
  line-height: 1.4;
}

.finding-fields {
  display: grid;
  gap: 0.7rem;
  margin: 1.25rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.finding-fields div {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 1rem;
}

.finding-fields dt {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  padding-top: 0.15rem;
}

.finding-fields dd {
  margin: 0;
}

.finding figcaption {
  margin-top: 0.85rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

@keyframes rise {
  from {
    transform: translateY(12px);
    opacity: 0.4;
  }
}

@keyframes strike {
  from {
    text-decoration-color: transparent;
  }
}

@keyframes settle {
  from {
    opacity: 0.2;
    filter: blur(3px);
  }
}

/* sections */

section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

section h2 {
  font-size: clamp(1.8rem, 1.2rem + 2vw, 2.75rem);
  font-weight: 720;
  letter-spacing: -0.022em;
}

.section-lede {
  margin-top: 0.85rem;
  color: var(--ink-muted);
  max-width: var(--measure);
  font-size: 1.1rem;
}

.band {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

/* packages */

.packages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2rem, 5vw, 3rem);
}

.package {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 3px solid var(--iris);
}

.package-head h3 {
  font-size: clamp(1.4rem, 1.1rem + 1vw, 1.75rem);
  letter-spacing: -0.015em;
}

.cadence {
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--iris-ink);
}

.covers {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.covers div {
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  gap: 1rem;
}

.covers dt {
  font-weight: 650;
}

.covers dd {
  margin: 0;
  color: var(--ink-muted);
}

.addon,
.included {
  background: var(--iris-wash);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  color: var(--ink);
}

.included h4 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.excludes {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.excludes span {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink);
  font-weight: 600;
}

/* how your code is treated */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.35rem;
}

.facts li {
  color: var(--ink-muted);
  max-width: var(--measure);
}

.facts strong {
  display: block;
  color: var(--ink);
  font-size: 1.1rem;
  margin-bottom: 0.15rem;
}

/* limits: the inverted band */

.limits {
  background: var(--band-ground);
  color: var(--band-ink);
}

.limits .section-lede {
  color: var(--band-ink);
  opacity: 0.85;
}

.nots {
  margin: clamp(2rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  border-top: 1px solid var(--band-muted);
}

.nots li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--band-muted);
  font-size: 1.1rem;
  padding-right: 1.5rem;
}

.no {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding-top: 0.25rem;
  color: var(--band-accent);
}

/* start */

.start-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) auto;
  gap: 2rem;
  align-items: end;
}

.start p {
  margin-top: 0.85rem;
  color: var(--ink-muted);
  max-width: 58ch;
}

/* footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem;
  font-size: 0.95rem;
}

.foot {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 2rem;
  align-items: center;
}

.foot-brand {
  font-weight: 700;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.foot-links a {
  color: var(--ink-muted);
}

.foot-note {
  grid-column: 1 / -1;
  color: var(--ink-muted);
  font-size: 0.875rem;
}

/* 404 */

.notfound {
  padding-block: clamp(4rem, 12vw, 9rem);
  min-height: 60vh;
}

.notfound h1 {
  font-size: clamp(2rem, 1.3rem + 3vw, 3.25rem);
  letter-spacing: -0.025em;
}

.notfound .actions {
  margin-top: 2rem;
}

/* narrow screens */

@media (max-width: 52rem) {
  .hero-grid,
  .split,
  .start-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 34rem) {
  .nav-hide-sm {
    display: none;
  }

  .covers div,
  .finding-fields div {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }

  .nots li {
    grid-template-columns: 4.25rem minmax(0, 1fr);
    padding-right: 0;
  }

  .foot {
    grid-template-columns: minmax(0, 1fr);
  }

  .foot-links {
    justify-content: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}