/* Sources: Tailwind CSS v3 spacing and type scale. Colors come from colors.css. Documented in docs/brand/GUIDELINES.md. */
@font-face {
  font-family: "Geist";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("assets/fonts/geist-latin.woff2") format("woff2");
}

:root {
  --split: var(--color-brand);
  --holdout: var(--color-data-holdout);

  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;

  --text-xs: 0.75rem;
  --text-xs-lh: 1rem;
  --text-sm: 0.875rem;
  --text-sm-lh: 1.25rem;
  --text-base: 1rem;
  --text-base-lh: 1.5rem;
  --text-lg: 1.125rem;
  --text-lg-lh: 1.75rem;
  --text-xl: 1.25rem;
  --text-xl-lh: 1.75rem;
  --text-2xl: 1.5rem;
  --text-2xl-lh: 2rem;
  --text-3xl: 1.875rem;
  --text-3xl-lh: 2.25rem;
  --text-4xl: 2.25rem;
  --text-4xl-lh: 2.5rem;
  --text-5xl: 3rem;
  --text-5xl-lh: 1;
  --text-6xl: 3.75rem;
  --text-6xl-lh: 1;
  --tracking-tight: -0.025em;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  --container-max: 1280px;
  --radius-md: 6px;
  --radius-xl: 12px;
}

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

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--text-base-lh);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

p {
  max-width: 65ch;
}

a {
  color: var(--color-text-link);
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.sprite {
  position: absolute;
  width: 0;
  height: 0;
}

.visually-hidden,
.skip:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 1;
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg);
}

h1,
h2 {
  color: var(--color-text-heading);
  font-weight: var(--weight-semibold);
  text-wrap: balance;
}

h1 {
  max-width: 14ch;
  font-size: var(--text-4xl);
  line-height: var(--text-4xl-lh);
  letter-spacing: var(--tracking-tight);
}

h2 {
  margin-bottom: var(--space-4);
  font-size: var(--text-3xl);
  line-height: var(--text-3xl-lh);
  letter-spacing: var(--tracking-tight);
}

@media (min-width: 768px) {
  h1 {
    font-size: var(--text-5xl);
    line-height: var(--text-5xl-lh);
  }

  h2 {
    font-size: var(--text-4xl);
    line-height: var(--text-4xl-lh);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: var(--text-6xl);
    line-height: var(--text-6xl-lh);
  }
}

h3 {
  color: var(--color-text-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  line-height: var(--text-lg-lh);
}

.btn {
  display: inline-flex;
  align-items: center;
  height: var(--space-10);
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-brand);
  color: var(--color-text-on-brand);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: var(--text-sm-lh);
  text-decoration: none;
}

.btn:hover {
  background: var(--color-brand-hover);
}

.btn:active {
  background: var(--color-brand-pressed);
}

.btn-lg {
  height: var(--space-12);
  padding-inline: var(--space-6);
}

.text-link {
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  min-height: var(--space-10);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
}

/* Layout: 10 columns, content in 1-8, margin notes in 9-10. */
.page {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.row {
  padding-block: var(--space-16);
  border-top: 1px solid var(--color-border-subtle);
}

.note {
  margin-top: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--text-sm-lh);
}

.note::before {
  content: "";
  display: block;
  width: var(--space-12);
  height: 1px;
  margin-bottom: var(--space-4);
  background: var(--color-border);
}

ul.note {
  display: grid;
  gap: var(--space-3);
}

@media (min-width: 1024px) {
  .page {
    padding-inline: var(--space-8);
  }

  .split {
    position: relative;
  }

  .split::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(var(--space-8) + (100% - 2 * var(--space-8)) * 0.8);
    width: 1px;
    background: var(--color-border-subtle);
  }

  .row {
    display: grid;
    grid-template-columns: repeat(10, minmax(0, 1fr));
    align-items: start;
    padding-block: var(--space-24);
  }

  .main {
    grid-column: 1 / 9;
    padding-right: var(--space-12);
  }

  .note {
    grid-column: 9 / 11;
    margin-top: 0;
    padding-left: var(--space-6);
  }

  .note::before {
    content: none;
  }
}

/* Header */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-6);
}

.wordmark {
  display: inline-flex;
  color: var(--color-brand);
  fill: currentColor;
}

.footer-wordmark {
  fill: currentColor;
}

.nav nav {
  margin-left: auto;
}

.nav ul {
  display: flex;
  gap: var(--space-8);
}

.nav nav a {
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
}

.nav nav a:hover {
  text-decoration: underline;
}

.nav nav a,
.footer-main li a {
  display: inline-flex;
  align-items: center;
  min-height: var(--space-10);
}

@media (max-width: 639px) {
  .nav {
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-6);
  }

  .nav nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .nav ul {
    flex-wrap: wrap;
    gap: 0 var(--space-6);
  }
}

/* Hero and split bar */
.hero {
  display: grid;
  grid-template-columns: 4fr 1fr;
  padding-top: var(--space-16);
}

.bar {
  grid-column: 1 / -1;
}

@media (max-width: 1023px) {
  .hero .main {
    grid-column: 1 / -1;
  }
}

.hero h1 {
  margin-bottom: var(--space-4);
}

.lede {
  margin-bottom: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: var(--text-lg-lh);
}

@media (min-width: 768px) {
  .lede {
    font-size: var(--text-xl);
    line-height: var(--text-xl-lh);
  }
}

/* One row at every width: narrower screens show fewer squares, always 80/20. */
.bar {
  display: grid;
  grid-template-columns: repeat(20, minmax(0, 1fr));
  gap: 3px;
  margin-top: var(--space-16);
}

@media (max-width: 639px) {
  .bar i:nth-child(n + 17):nth-child(-n + 80),
  .bar i:nth-child(n + 85) {
    display: none;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .bar {
    grid-template-columns: repeat(50, minmax(0, 1fr));
    gap: 2px;
  }

  .bar i:nth-child(n + 41):nth-child(-n + 80),
  .bar i:nth-child(n + 91) {
    display: none;
  }
}

.bar i {
  aspect-ratio: 1;
  background: var(--split);
}

.bar i:nth-child(n + 81) {
  background: var(--holdout);
}

.bar-caption {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  line-height: var(--text-xs-lh);
  font-variant-numeric: tabular-nums;
}

.bar-holdout {
  color: var(--color-text-muted);
}

@media (min-width: 1024px) {
  .hero {
    grid-template-columns: repeat(10, minmax(0, 1fr));
    padding-top: var(--space-32);
  }

  .bar {
    grid-template-columns: repeat(100, minmax(0, 1fr));
    gap: 2px;
  }

  .bar-offer {
    grid-column: 1 / 9;
  }

  .bar-holdout {
    grid-column: 9 / 11;
    padding-left: var(--space-6);
  }
}

/* Crux and the offer mock */
.crux {
  display: grid;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .crux {
    grid-template-columns: 1fr 1fr;
  }
}

.offer {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.offer-head,
.offer-stats div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
}

.offer-title {
  font-weight: var(--weight-medium);
}

.pair {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-block: var(--space-6);
}

.thumb {
  display: grid;
  place-items: center;
  width: var(--space-12);
  height: var(--space-12);
  background: var(--color-fill-hover);
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
}

.plus {
  color: var(--color-text-muted);
}

.pair-names {
  margin-left: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--text-sm-lh);
}

.offer-stats div {
  padding-block: var(--space-2);
  border-top: 1px solid var(--color-border-subtle);
  font-size: var(--text-sm);
  line-height: var(--text-sm-lh);
}

.offer-stats dt {
  color: var(--color-text-muted);
}

.offer-stats dd {
  font-weight: var(--weight-semibold);
  font-variant-numeric: tabular-nums;
}

.pos {
  color: var(--color-success-text);
}

.mock figcaption {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: var(--text-xs-lh);
}

.chip {
  display: inline-block;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-brand-subtle);
  border-radius: var(--radius-md);
  background: var(--color-brand-subtle);
  color: var(--color-text-link);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  line-height: var(--text-xs-lh);
}

.chip-working {
  border-color: var(--color-success-subtle);
  background: var(--color-success-subtle);
  color: var(--color-success-text);
}

.chip-bad {
  border-color: var(--color-danger-subtle);
  background: var(--color-danger-subtle);
  color: var(--color-danger-text);
}

.states .chip {
  display: block;
  width: fit-content;
  margin-bottom: var(--space-1);
}

/* Steps and plans share one column pattern: top rule, then content */
.steps,
.plans {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.steps {
  counter-reset: step;
}

.steps li,
.plan {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

.steps li {
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: var(--space-8);
  height: var(--space-8);
  margin-bottom: var(--space-4);
  border-radius: 50%;
  background: var(--color-fill-hover);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: var(--text-sm-lh);
  font-variant-numeric: tabular-nums;
}

.steps h3,
.plan h3 {
  margin-bottom: var(--space-2);
}

.steps p {
  color: var(--color-text-muted);
}

.plan-featured {
  border-top-color: var(--color-border-brand);
}

.plan-price {
  margin-top: var(--space-4);
  font-size: var(--text-4xl);
  font-weight: var(--weight-semibold);
  line-height: var(--text-4xl-lh);
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}

.plan-price span {
  margin-left: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-regular);
  line-height: var(--text-sm-lh);
  letter-spacing: 0;
}

.plan-meta {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--text-sm-lh);
}

.plan-limit {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: var(--text-sm-lh);
}

@media (min-width: 768px) {
  .steps,
  .plans {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Questions */
.faq details {
  border-top: 1px solid var(--color-border-subtle);
}

.faq details:last-child {
  border-bottom: 1px solid var(--color-border-subtle);
}

.faq summary {
  padding-block: var(--space-4);
  font-weight: var(--weight-medium);
  cursor: pointer;
}

.faq details p {
  padding-bottom: var(--space-4);
  color: var(--color-text-muted);
}

/* Final line and footer */
.final h2 {
  margin-bottom: var(--space-4);
}

.footer {
  padding-block: var(--space-12);
}

.footer-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--text-sm-lh);
}

.footer-main ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
}

.footer-main a {
  color: var(--color-text-muted);
}

.footer-wordmark {
  color: var(--color-brand);
}

/* Brand accents: highlighted words and hover states */
.hl {
  color: var(--color-text-link);
  font-weight: var(--weight-semibold);
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.hero .hl {
  display: inline-block;
  animation: hl-pop 600ms 300ms cubic-bezier(0.2, 0.9, 0.3, 1.2) both;
}

.hero .hl + .hl {
  animation-delay: 700ms;
}

@keyframes hl-pop {
  from {
    opacity: 0;
    transform: translateY(0.2em) scale(0.92);
  }
}

.nav nav a,
.text-link,
.footer-main a,
.faq summary,
.steps li,
.steps li::before,
.steps h3,
.plan,
.plan-price,
.btn {
  transition:
    color 150ms ease,
    background-color 150ms ease,
    border-color 150ms ease,
    text-decoration-color 150ms ease;
}

.nav nav a:hover,
.footer-main a:hover,
.faq summary:hover,
.faq details[open] summary {
  color: var(--color-text-link);
}

.nav nav a:hover,
.text-link:hover,
.footer-main a:hover {
  text-decoration-color: var(--color-text-link);
}

.text-link,
.footer-main a {
  text-decoration-color: var(--color-text);
}

.text-link {
  text-decoration-thickness: 2px;
}

.text-link:hover {
  color: var(--color-text-link);
}

.steps li,
.plan {
  border-top-width: 2px;
}

.steps li:hover,
.plan:hover,
.plan-featured {
  border-top-color: var(--color-border-brand);
}

.steps li:hover::before {
  background: var(--color-brand);
  color: var(--color-text-on-brand);
}

.steps li:hover h3,
.plan:hover .plan-price,
.plan-featured .plan-price {
  color: var(--color-text-link);
}

/* The highlight follows the pointer: hovering another plan releases Growth. */
.plans:has(.plan:hover) .plan-featured:not(:hover) {
  border-top-color: var(--color-border-subtle);
}

.plans:has(.plan:hover) .plan-featured:not(:hover) .plan-price {
  color: var(--color-text);
}

@media (prefers-reduced-motion: reduce) {
  .hero .hl {
    animation: none;
  }

  .nav nav a,
  .text-link,
  .footer-main a,
  .faq summary,
  .steps li,
  .steps li::before,
  .steps h3,
  .plan,
  .plan-price,
  .btn {
    transition: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .wordmark,
  :root:not([data-theme="light"]) .footer-wordmark {
    color: var(--color-text);
  }
}

:root[data-theme="dark"] .wordmark,
:root[data-theme="dark"] .footer-wordmark {
  color: var(--color-text);
}

@media (max-width: 639px) {
  .theme-toggle {
    margin-left: auto;
  }
}

.not-found {
  padding-block: var(--space-32);
}

.not-found h1 {
  margin-bottom: var(--space-4);
}