:root {
  --paper: #fbfaf8;
  --paper-deep: #f0ebe3;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --line: rgba(35, 28, 24, 0.12);
  --text: #4e4641;
  --text-strong: #1f1816;
  --muted: #756b64;
  --accent: #cc0737;
  --accent-dark: #8d1534;
  --success: #137a54;
  --reader-bg: #141516;
  --reader-surface: #111213;
  --reader-page: #f4efe5;
  --shadow: 0 22px 54px rgba(34, 26, 20, 0.08);
  --shadow-soft: 0 10px 26px rgba(34, 26, 20, 0.06);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(204, 7, 55, 0.025), transparent 24%),
    linear-gradient(180deg, #fffdf9 0%, #f3eee6 100%);
  font-family: "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(204, 7, 55, 0.025), transparent 24%),
    linear-gradient(180deg, #fffdf9 0%, #f3eee6 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(56, 41, 31, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 41, 31, 0.018) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.32), transparent 62%);
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 8px;
}

.site-header,
.site-footer {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--accent);
  text-decoration: none;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  box-shadow: 0 8px 18px rgba(204, 7, 55, 0.13);
}

.wordmark {
  font-family: "Courier New", Courier, monospace;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.brand .wordmark {
  font-size: 1.82rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav a,
.ghost-button,
.primary-button {
  border-radius: var(--radius-sm);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  font-weight: 700;
  transition:
    transform 140ms var(--ease),
    box-shadow 140ms var(--ease),
    background 140ms var(--ease);
}

nav a,
.ghost-button {
  color: var(--text-strong);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.64);
}

.primary-button {
  color: #fff9fb;
  background: var(--accent);
  box-shadow: 0 14px 28px rgba(204, 7, 55, 0.2);
}

nav a:hover,
.ghost-button:hover,
.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

main {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 82px);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  align-items: center;
  gap: 34px;
  padding: 34px 0 70px;
}

.product-hero {
  min-height: 680px;
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--text-strong);
  font-size: clamp(3rem, 5.6vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.025em;
}

h2 {
  color: var(--text-strong);
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.022em;
}

h3 {
  color: var(--text-strong);
  font-size: 1.25rem;
  line-height: 1.15;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.13rem;
}

.hero-actions,
.card-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.reader-card,
.install-panel,
.product-card,
.principles article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.reader-card {
  overflow: hidden;
  padding: 16px;
  background: var(--reader-bg);
}

.reader-top {
  display: flex;
  gap: 7px;
  padding: 8px 8px 14px;
}

.reader-top span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
}

.reader-spread {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  min-height: 420px;
}

.reader-spread article {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 420px;
  padding: 28px;
  border-radius: 18px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.55), transparent 44%),
    var(--reader-page);
  color: var(--text);
}

.reader-spread h2 {
  font-size: 2.1rem;
}

.page-label {
  margin-bottom: auto;
  color: var(--accent);
  font-family: "Courier New", Courier, monospace;
}

.section {
  padding: 86px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  min-height: 310px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.product-card.featured {
  grid-column: span 2;
  background: var(--panel-strong);
}

.product-card p,
.principles p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 36px;
  align-items: start;
}

.principles {
  display: grid;
  gap: 14px;
}

.principles article {
  padding: 24px;
}

.install-panel {
  padding: 24px;
  display: grid;
  gap: 12px;
}

.check-line {
  display: grid;
  gap: 4px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(95, 75, 50, 0.08);
}

.check-line span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.check-line strong {
  color: var(--text-strong);
  font-size: 1.05rem;
}

.terminal-card {
  margin-top: 10px;
  padding: 22px;
  color: #f6efe4;
  background: var(--reader-bg);
  border-radius: var(--radius-md);
  overflow-wrap: anywhere;
}

.terminal-card code {
  font-family: "Cascadia Code", "Courier New", monospace;
}

.link-list {
  display: grid;
  gap: 12px;
}

.link-list a {
  padding: 18px 20px;
  color: var(--text-strong);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.48);
  font-weight: 750;
}

.site-footer {
  min-height: 96px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.site-footer a:first-of-type {
  margin-left: auto;
}

.brand-hero {
  min-height: min(640px, calc(100vh - 76px));
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  align-items: center;
  gap: 58px;
  padding: 48px 0 86px;
  position: relative;
}

.brand-hero-inner {
  max-width: 760px;
  position: relative;
  z-index: 1;
}

.brand-hero h1 {
  max-width: 760px;
  font-size: clamp(3.25rem, 7vw, 6.6rem);
  line-height: 0.94;
  letter-spacing: -0.045em;
}

.brand-hero p:not(.eyebrow) {
  max-width: 610px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
}

.brand-note {
  align-self: end;
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.58), transparent),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

.brand-note .wordmark {
  display: block;
  margin-bottom: 76px;
  font-size: 3.2rem;
}

.brand-note p {
  margin-bottom: 26px;
  color: var(--text-strong);
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

.brand-note dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.brand-note div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.brand-note dt {
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  flex: 0 0 auto;
}

.brand-note dd {
  margin: 0;
  color: var(--text-strong);
  font-weight: 750;
  text-align: right;
  min-width: 0;
  overflow-wrap: anywhere;
}

.studio-panel,
.contact-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: 38px;
  align-items: end;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.studio-panel p,
.contact-band p {
  color: var(--muted);
  font-size: 1.08rem;
}

.standards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 56px 0;
}

.standards-grid article,
.promise-grid article {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.48);
  box-shadow: var(--shadow-soft);
}

.standards-grid span,
.flow-rail span {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--accent);
  font-family: "Courier New", Courier, monospace;
}

.standards-grid p,
.promise-grid p {
  color: var(--muted);
}

.contact-band {
  margin-bottom: 72px;
  align-items: center;
}

.openinstall-page {
  background:
    radial-gradient(circle at 82% 8%, rgba(204, 7, 55, 0.055), transparent 24%),
    linear-gradient(180deg, #fffdf9 0%, #f5f0e9 56%, #f0e9df 100%);
}

.oi-hero {
  min-height: min(600px, calc(100vh - 76px));
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.82fr);
  align-items: center;
  gap: 56px;
  padding: 38px 0 68px;
}

.oi-copy h1 {
  max-width: 720px;
  font-size: clamp(3.1rem, 5.2vw, 5.05rem);
  line-height: 0.98;
}

.oi-copy p:not(.eyebrow) {
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.metric-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.metric-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  color: var(--text-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  font-size: 0.9rem;
  font-weight: 750;
}

.consent-preview {
  padding: 20px;
  border: 1px solid rgba(95, 75, 50, 0.16);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), transparent),
    var(--panel);
  box-shadow: var(--shadow);
}

.preview-title {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 18px;
  color: var(--text-strong);
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 7px rgba(204, 7, 55, 0.12);
}

.trust-card,
.preview-grid > div,
.preview-source {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.55);
}

.trust-card {
  padding: 20px;
}

.trust-card span,
.preview-grid span,
.preview-source span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.trust-card strong,
.preview-grid strong {
  color: var(--text-strong);
}

.trust-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.preview-grid > div,
.preview-source {
  padding: 16px;
}

.preview-source {
  margin-top: 12px;
  overflow-wrap: anywhere;
}

.preview-source code {
  color: var(--text-strong);
  font-family: "Cascadia Code", "Courier New", monospace;
}

.preview-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

.preview-actions button {
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.55);
  color: var(--text-strong);
  font-weight: 800;
}

.preview-actions button:last-child {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff9fb;
}

.preview-checks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.preview-checks span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  color: var(--success);
  border: 1px solid rgba(19, 122, 84, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(19, 122, 84, 0.06);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
}

.flow-section,
.package-section,
.promise-grid,
.detail-section,
.architecture-section {
  padding: 64px 0;
}

.flow-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.flow-rail article {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.detail-grid article {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
  box-shadow: var(--shadow-soft);
}

.detail-grid span {
  display: inline-flex;
  margin-bottom: 34px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.detail-grid p {
  color: var(--muted);
}

.detail-grid code {
  color: var(--text-strong);
  font-family: "Cascadia Code", "Courier New", monospace;
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

.flow-rail p {
  color: var(--muted);
}

.package-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 28px;
  align-items: center;
}

.architecture-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr);
  gap: 36px;
  align-items: start;
}

.architecture-list {
  display: grid;
  gap: 10px;
}

.architecture-list article {
  display: grid;
  grid-template-columns: minmax(120px, 0.38fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.58);
}

.architecture-list strong {
  color: var(--text-strong);
}

.architecture-list span {
  color: var(--muted);
}

.package-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
}

.package-tree {
  margin: 0;
  padding: 28px;
  color: #f6efe4;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), transparent 38%),
    var(--reader-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: auto;
}

.package-tree code {
  font-family: "Cascadia Code", "Courier New", monospace;
  font-size: clamp(0.92rem, 1.6vw, 1.08rem);
  line-height: 1.7;
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.status-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: 34px;
  align-items: center;
  margin: 0 0 30px;
  padding: 34px;
  border: 1px solid rgba(204, 7, 55, 0.16);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(204, 7, 55, 0.08), transparent 42%),
    rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-soft);
}

.status-panel p {
  color: var(--muted);
  font-size: 1.05rem;
}

.text-page {
  max-width: 820px;
  min-height: calc(100vh - 178px);
}

.text-page h1 {
  font-size: clamp(3rem, 8vw, 5.2rem);
}

.text-page p {
  color: var(--muted);
  font-size: 1.08rem;
}

@media (max-width: 880px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  nav {
    justify-content: flex-start;
    width: 100%;
  }

  .hero,
  .split,
  .oi-hero,
  .brand-hero,
  .studio-panel,
  .contact-band,
  .package-section,
  .architecture-section,
  .status-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  .product-grid,
  .standards-grid,
  .flow-rail,
  .promise-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .product-card.featured {
    grid-column: auto;
  }

  .brand-hero {
    min-height: auto;
    gap: 28px;
    padding: 42px 0 64px;
  }

  .brand-note {
    align-self: auto;
  }

  .brand-note .wordmark {
    margin-bottom: 34px;
  }

  .oi-hero {
    min-height: auto;
    gap: 28px;
    padding: 42px 0 64px;
  }

  .architecture-list article {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

@media (max-width: 560px) {
  .site-header,
  .site-footer,
  main {
    width: calc(100vw - 64px);
    max-width: calc(100vw - 64px);
    margin-left: auto;
    margin-right: auto;
  }

  h1 {
    font-size: 2.15rem;
  }

  .brand-hero h1,
  .oi-copy h1 {
    max-width: 9.5em;
    font-size: 2.32rem;
    line-height: 1.02;
    letter-spacing: -0.02em;
  }

  .brand-hero-inner,
  .oi-copy,
  .brand-note,
  .consent-preview,
  .hero-actions,
  .metric-strip {
    width: 100%;
    max-width: 100%;
  }

  .brand-hero p:not(.eyebrow),
  .oi-copy p:not(.eyebrow),
  .brand-note p {
    max-width: min(100%, 19.5rem);
    font-size: 0.98rem;
    line-height: 1.55;
  }

  .oi-copy h1 {
    max-width: 8.4em;
  }

  .brand-note div {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .brand-note dd {
    text-align: left;
  }

  .reader-spread {
    grid-template-columns: 1fr;
  }

  .reader-spread article {
    min-height: 280px;
  }

  nav a,
  .primary-button,
  .ghost-button {
    width: 100%;
  }

  .site-footer a {
    margin-left: 0;
  }

  .site-footer a:first-of-type {
    margin-left: 0;
  }

  .studio-panel,
  .contact-band,
  .consent-preview,
  .status-panel {
    padding: 22px;
  }

  .preview-grid,
  .preview-checks {
    grid-template-columns: 1fr;
  }

  .detail-section,
  .architecture-section,
  .flow-section,
  .package-section,
  .promise-grid {
    padding: 48px 0;
  }

  .metric-strip {
    display: grid;
    grid-template-columns: 1fr;
  }

  .metric-strip span {
    justify-content: center;
  }
}