@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Space+Grotesk:wght@300;400;500;700&display=swap");

:root {
  --bg: #f6f1e9;
  --bg-strong: #efe7dc;
  --panel: rgba(255, 255, 255, 0.68);
  --panel-strong: rgba(255, 255, 255, 0.88);
  --ink: #111111;
  --muted: #5d5a55;
  --soft: #857f77;
  --line: rgba(17, 17, 17, 0.12);
  --line-strong: rgba(17, 17, 17, 0.2);
  --accent: #127366;
  --accent-soft: rgba(18, 115, 102, 0.12);
  --accent-strong: #0d5a50;
  --shadow: 0 24px 80px rgba(17, 17, 17, 0.12);
  --shadow-soft: 0 18px 48px rgba(17, 17, 17, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --site-width: 1180px;
  --copy-width: 720px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(18, 115, 102, 0.09), transparent 32%),
    radial-gradient(circle at 85% 18%, rgba(18, 115, 102, 0.08), transparent 24%),
    linear-gradient(180deg, #fcfaf6 0%, var(--bg) 40%, #f0e7db 100%);
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  pointer-events: none;
  z-index: -1;
}

body::before {
  width: 28rem;
  height: 28rem;
  top: -10rem;
  right: -7rem;
  background: radial-gradient(circle, rgba(18, 115, 102, 0.16), transparent 68%);
}

body::after {
  width: 26rem;
  height: 26rem;
  left: -10rem;
  bottom: -10rem;
  background: radial-gradient(circle, rgba(17, 17, 17, 0.06), transparent 70%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--site-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(246, 241, 233, 0.92), rgba(246, 241, 233, 0.66));
  border-bottom: 1px solid rgba(17, 17, 17, 0.05);
}

.site-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.wordmark-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #111111, #343434);
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.wordmark-mark span {
  font-size: 1rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-nav a {
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: var(--muted);
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
  transform: translateY(-1px);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  min-height: 3.25rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--ink);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.58);
  border-color: var(--line);
  color: var(--ink);
}

.button-quiet {
  color: var(--muted);
}

.button-quiet:hover,
.button-quiet:focus-visible {
  color: var(--ink);
}

.hero {
  padding: 4.75rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(17, 17, 17, 0.08);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(18, 115, 102, 0.12);
}

.hero-title {
  margin: 1.3rem 0 1rem;
  font-size: clamp(3.1rem, 6vw, 6.2rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.hero-title .title-em {
  display: block;
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.03em;
}

.hero-copy {
  max-width: 37rem;
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(17, 17, 17, 0.08);
  color: var(--muted);
  font-size: 0.92rem;
}

.pill strong {
  color: var(--ink);
}

.agent-stage {
  position: relative;
  padding: 1.2rem;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.52)),
    linear-gradient(135deg, rgba(18, 115, 102, 0.07), transparent 45%);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.agent-stage::before {
  content: "";
  position: absolute;
  inset: 1rem auto auto 1rem;
  width: 8rem;
  height: 8rem;
  background: radial-gradient(circle, rgba(18, 115, 102, 0.18), transparent 70%);
  filter: blur(10px);
}

.stage-header {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
}

.stage-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.stage-status {
  color: var(--soft);
  font-size: 0.88rem;
}

.chat-thread {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.9rem;
  padding: 1rem 0 0;
}

.bubble {
  max-width: 86%;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  font-size: 0.98rem;
  box-shadow: var(--shadow-soft);
}

.bubble strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bubble.user {
  justify-self: end;
  background: #121212;
  color: #ffffff;
  border-bottom-right-radius: 8px;
}

.bubble.user strong {
  color: rgba(255, 255, 255, 0.64);
}

.bubble.assistant {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-bottom-left-radius: 8px;
}

.bubble.assistant strong {
  color: var(--accent-strong);
}

.bubble-small {
  font-size: 0.9rem;
  color: var(--muted);
}

.plan-panel,
.tool-panel {
  position: relative;
  z-index: 1;
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(17, 17, 17, 0.08);
}

.panel-kicker {
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-title {
  margin: 0.3rem 0 0.9rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.shot-list {
  display: grid;
  gap: 0.8rem;
}

.shot {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
}

.shot-index {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
}

.shot-body {
  display: grid;
  gap: 0.25rem;
}

.shot-body strong {
  font-size: 0.95rem;
}

.shot-body span {
  color: var(--muted);
  font-size: 0.9rem;
}

.shot-kicker {
  color: var(--soft);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tool-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.tool-copy {
  color: var(--muted);
  font-size: 0.94rem;
}

.tool-chip {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: #111111;
  color: #ffffff;
  font-size: 0.84rem;
  font-weight: 700;
}

.section {
  padding: 3.75rem 0;
}

.section-header {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 1.7rem;
}

.section-kicker {
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-title {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(2.1rem, 4vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.section-copy {
  max-width: 44rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.feature-grid,
.process-grid,
.prompt-grid,
.posts-grid,
.detail-grid {
  display: grid;
  gap: 1rem;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card,
.process-step,
.prompt-card,
.post-card,
.detail-card,
.article-callout {
  padding: 1.3rem;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.feature-card h3,
.process-step h3,
.prompt-card h3,
.detail-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.12rem;
}

.feature-card p,
.process-step p,
.prompt-card p,
.detail-card p {
  margin: 0;
  color: var(--muted);
}

.detail-card ul {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.detail-card li + li {
  margin-top: 0.45rem;
}

.feature-card .feature-id,
.process-step .process-id {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  margin-bottom: 1rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.process-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.detail-grid {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: start;
}

.prompt-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prompt-card {
  position: relative;
  overflow: hidden;
}

.prompt-card::after {
  content: "";
  position: absolute;
  inset: auto -2rem -2rem auto;
  width: 8rem;
  height: 8rem;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(18, 115, 102, 0.18), transparent 70%);
}

.prompt-card .prompt-label {
  color: var(--soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.prompt-card blockquote {
  margin: 0.8rem 0 0;
  font-size: 1.18rem;
  line-height: 1.35;
}

.posts-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.post-card {
  display: grid;
  gap: 0.95rem;
}

.post-card.featured {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.58)),
    linear-gradient(135deg, rgba(18, 115, 102, 0.08), transparent 60%);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  color: var(--soft);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.post-card h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.post-card p {
  margin: 0;
  color: var(--muted);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag {
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(17, 17, 17, 0.08);
  color: var(--muted);
  font-size: 0.82rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.filter-button {
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: rgba(255, 255, 255, 0.58);
  color: var(--muted);
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.filter-button:hover,
.filter-button:focus-visible {
  transform: translateY(-1px);
  color: var(--ink);
}

.filter-button.is-active {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

.page-hero {
  padding: 4.4rem 0 2rem;
}

.page-hero .section-copy {
  max-width: 42rem;
}

.article-shell {
  width: min(calc(100% - 2rem), var(--copy-width));
  margin: 0 auto;
}

.article-header {
  padding: 4rem 0 1.5rem;
}

.article-kicker {
  color: var(--accent-strong);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-title {
  margin: 0.7rem 0 0.9rem;
  font-size: clamp(2.6rem, 6vw, 4.9rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

.article-dek {
  margin: 0;
  font-size: 1.15rem;
  color: var(--muted);
}

.article-body {
  padding: 1.5rem 0 3.2rem;
}

.article-body h2,
.article-body h3 {
  margin-top: 2.4rem;
  margin-bottom: 0.85rem;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.article-body h2 {
  font-size: clamp(1.85rem, 4vw, 2.7rem);
}

.article-body h3 {
  font-size: 1.35rem;
}

.article-body p,
.article-body ul,
.article-body ol {
  margin: 0 0 1rem;
  color: #262522;
  font-size: 1.06rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.3rem;
}

.article-body li + li {
  margin-top: 0.55rem;
}

.article-body strong {
  color: var(--ink);
}

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.52);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.article-callout {
  margin: 1.5rem 0;
}

.article-callout h3,
.article-callout p {
  margin: 0;
}

.article-callout p {
  margin-top: 0.55rem;
}

.faq {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.faq-item {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(17, 17, 17, 0.08);
}

.faq-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.08rem;
}

.faq-item p {
  margin: 0;
}

.article-cta {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.split-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--soft);
  font-size: 0.92rem;
}

.site-footer {
  padding: 3rem 0 3.5rem;
}

.footer-card {
  display: grid;
  gap: 1rem;
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  background: rgba(17, 17, 17, 0.95);
  color: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  color: rgba(255, 255, 255, 0.62);
  max-width: 32rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.82);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #ffffff;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.rotating-prompt {
  transition: opacity 220ms ease, transform 220ms ease;
}

.rotating-prompt.is-fading {
  opacity: 0;
  transform: translateY(5px);
}

@media (max-width: 1080px) {
  .hero-grid,
  .detail-grid,
  .feature-grid,
  .process-grid,
  .posts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .site-header-row,
  .site-nav,
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .hero-grid,
  .detail-grid,
  .feature-grid,
  .process-grid,
  .prompt-grid,
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: clamp(2.8rem, 14vw, 4.2rem);
  }

  .article-title {
    font-size: clamp(2.35rem, 12vw, 3.8rem);
  }

  .section {
    padding: 3rem 0;
  }

  .page-hero,
  .article-header {
    padding-top: 3rem;
  }
}

@media (max-width: 640px) {
  .site-shell,
  .article-shell {
    width: min(calc(100% - 1.2rem), var(--site-width));
  }

  .button {
    width: 100%;
  }

  .bubble {
    max-width: 100%;
  }

  .agent-stage {
    padding: 1rem;
  }

  .feature-card,
  .process-step,
  .prompt-card,
  .post-card,
  .detail-card,
  .article-callout {
    padding: 1.1rem;
  }
}