/* Tropism — website v1
   One page, no framework, no build step, no JavaScript.
   Fonts are loaded by the single Google Fonts link in index.html with display=swap. */

:root {
  --p-bg: #0f0f0f;
  --p-surface: #1a1a1a;
  --p-ink: #ffffff;
  --p-muted: #8f8f8f;
  --p-accent: #dafa9c;
  --p-accent-ink: #0f0f0f;
  --p-accent-deep: #567e07; /* the accent at text contrast on the white verdict card (4.8:1) */
  --p-action: #dafa9c;
  --p-action-ink: #0f0f0f;
  --p-inv-bg: #ffffff;
  --p-inv-surface: #ececec;
  --p-inv-ink: #0f0f0f;
  --p-inv-muted: #5f5f5f;
  --font-display: 'Host Grotesk', system-ui, sans-serif;
  --font-text: 'Host Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  --gutter: clamp(20px, 5vw, 64px);
  --section-space: clamp(88px, 13vh, 160px);
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
}

html[data-radius="soft"] {
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

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

html {
  background: var(--p-bg);
}

body {
  margin: 0;
  background: var(--p-bg);
  color: var(--p-ink);
  font-family: var(--font-text);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

::selection {
  background: var(--p-accent);
  color: var(--p-accent-ink);
}

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

.shell {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 10;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: var(--p-accent);
  color: var(--p-accent-ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--p-surface);
}

.site-header__inner {
  display: flex;
  align-items: center;
  min-height: 76px;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.wordmark:hover {
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

/* Hero */

.hero {
  padding-block: clamp(72px, 11vw, 132px) clamp(88px, 12vw, 152px);
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__num {
  margin: 0 0 14px;
  color: var(--p-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.hero h1 {
  margin: 0;
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 8.2vw, 6.75rem);
  font-weight: 500;
  line-height: 0.94;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero__sub {
  margin: clamp(24px, 3vw, 36px) 0 0;
  max-width: 52ch;
  color: var(--p-muted);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  line-height: 1.5;
  text-wrap: pretty;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  margin-top: clamp(32px, 4vw, 48px);
  padding: 0 1.6rem;
  border-radius: var(--radius-pill);
  background: var(--p-action);
  color: var(--p-action-ink);
  font-family: var(--font-text);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: opacity 140ms ease;
}

.cta:hover {
  opacity: 0.88;
}

/* The one visual: a real gate verdict, not a dashboard. */

.verdict {
  width: 100%;
  max-width: 880px;
  margin: 32px auto 0;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-lg);
  outline: 1px solid var(--p-surface);
  outline-offset: clamp(8px, 1.2vw, 12px);
  background: var(--p-inv-bg);
  color: var(--p-inv-ink);
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 1.05vw, 0.875rem);
  line-height: 1.7;
  text-align: left;
}

.verdict__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0 0 clamp(18px, 2.5vw, 24px);
  padding: 0 0 12px;
  border-bottom: 1px solid var(--p-inv-surface);
  color: var(--p-inv-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.verdict__status {
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  background: var(--p-accent);
  color: var(--p-accent-ink);
  font-weight: 500;
  letter-spacing: 0.08em;
  animation: verdict-in 380ms ease-out 1.25s both;
}

/* The verdict in plain language. The reader is not the engineer. */

.verdict__beats {
  display: grid;
  gap: clamp(0.95rem, 1.8vw, 1.25rem);
}

.verdict__beat {
  margin: 0;
  color: var(--p-inv-ink);
  font-family: var(--font-text);
  font-size: clamp(1.0625rem, 1.7vw, 1.1875rem);
  line-height: 1.5;
  letter-spacing: -0.005em;
  animation: verdict-in 380ms ease-out both;
}

.verdict__beat--1 {
  animation-delay: 0.2s;
}

.verdict__beat--2 {
  animation-delay: 0.55s;
}

.verdict__beat--3 {
  animation-delay: 0.9s;
  color: var(--p-accent-deep);
}

.verdict__beat q {
  quotes: "\201C" "\201D";
}

.verdict__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--p-inv-surface);
  color: var(--p-inv-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  white-space: nowrap;
}

/* Never fade from 0: if animations are throttled or disabled the text can hold
   the from state indefinitely. Starting at 0.6 leaves it faint but readable. */
@keyframes verdict-in {
  from {
    opacity: 0.6;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sections 2–6 */

.section {
  padding-block: var(--section-space);
  border-top: 1px solid var(--p-surface);
}

.section__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}

.section__num {
  margin: 0 0 14px;
  color: var(--p-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.section h2 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

.section__body {
  max-width: 660px;
}

.section__body p {
  margin: 0 0 1.25em;
}

.section__body p:last-child {
  margin-bottom: 0;
}

.section__body .lead {
  margin-bottom: clamp(28px, 4vw, 44px);
  max-width: 46ch;
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  line-height: 1.45;
  letter-spacing: -0.012em;
  text-wrap: pretty;
}

.section__body a {
  color: var(--p-accent);
}

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

/* Why this fails */

.causes {
  display: grid;
}

.cause {
  padding-block: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--p-surface);
}

.cause:first-child {
  padding-top: 0;
  border-top: 0;
}

.cause:last-child {
  padding-bottom: 0;
}

.cause h3,
.phase h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1.7vw, 1.45rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.cause p,
.phase p {
  margin: 0;
}

/* How it works */

.stages {
  margin: 0 0 clamp(28px, 4vw, 40px);
  padding: 0 0 0 1.4rem;
  list-style: decimal;
}

.stages li {
  padding-block: 0.75rem;
  line-height: 1.55;
}

.stages li::marker {
  color: var(--p-muted);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.stages strong,
.gates strong {
  font-weight: 500;
}

.gates {
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--p-surface);
}

/* How an engagement runs */

.phases {
  display: grid;
  gap: clamp(24px, 4vw, 36px);
}

/* Proof */

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem clamp(24px, 4vw, 48px);
  margin: 0 0 clamp(28px, 4vw, 40px);
  padding: clamp(16px, 2.5vw, 22px) 0;
  border-top: 1px solid var(--p-surface);
  border-bottom: 1px solid var(--p-surface);
  list-style: none;
  font-family: var(--font-mono);
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
  color: var(--p-muted);
}

.stats strong {
  margin-right: 0.15em;
  color: var(--p-accent);
  font-weight: 500;
}

/* Contact */

.section--contact {
  padding-bottom: clamp(110px, 16vh, 180px);
}

.section__body .contact-line {
  margin-bottom: 1.5rem;
  max-width: 44ch;
  font-size: clamp(1.25rem, 2.1vw, 1.75rem);
  line-height: 1.4;
  letter-spacing: -0.018em;
}

.section__body .contact-links {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* Footer */

.site-footer {
  padding-block: 28px;
  border-top: 1px solid var(--p-surface);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  color: var(--p-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.site-footer p {
  margin: 0;
}

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

.site-footer a:hover {
  color: var(--p-ink);
  text-decoration: underline;
}

/* Breakpoints */

@media (max-width: 900px) {
  .section__inner {
    grid-template-columns: 1fr;
    gap: clamp(24px, 5vw, 40px);
  }

  .section__head {
    display: flex;
    align-items: baseline;
    gap: 16px;
  }

  .section__num {
    margin: 0;
  }

  .section h2 {
    max-width: 18ch;
  }

  .section__body {
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 1rem;
    line-height: 1.6;
  }

  .hero {
    padding-block: 64px 88px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 13vw, 3.25rem);
  }

  .verdict__head {
    font-size: 0.66rem;
  }

  .section {
    padding-block: 80px;
  }

  .section__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .section h2 {
    font-size: clamp(1.9rem, 9vw, 2.5rem);
  }

  .cause h3,
  .phase h3 {
    font-size: 1.2rem;
  }

  .stats {
    font-size: 0.78rem;
  }

  .section__body .contact-line {
    font-size: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .verdict__beat,
  .verdict__status {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* Privacy: a document, not a marketing page. Scoped to .page-doc so the
   one-idea-per-screen rhythm on index.html is untouched. */

.page-doc .section {
  min-height: auto;
  padding-block: clamp(2.5rem, 5vw, 4rem);
}