:root {
  color-scheme: light;
  --ink: #102837;
  --muted: #58707d;
  --paper: #f6fbfc;
  --surface: #ffffff;
  --soft: #e8f5f5;
  --line: #c9dde3;
  --navy: #174d6a;
  --navy-dark: #0c3449;
  --teal: #0d9296;
  --teal-dark: #087378;
  --green: #24b978;
  --amber: #c97828;
  --shadow: 0 24px 70px rgba(15, 63, 82, 0.15);
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 86% 8%, rgba(13, 146, 150, 0.17), transparent 30rem),
    radial-gradient(circle at 12% 28%, rgba(36, 185, 120, 0.08), transparent 24rem),
    linear-gradient(180deg, #fbfefe 0%, #f2f8fa 100%);
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  color: var(--teal);
}

code {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(201, 221, 227, 0.82);
  background: rgba(246, 251, 252, 0.9);
  backdrop-filter: blur(18px);
}

.nav,
.section,
.footer-inner {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 770;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(13, 111, 130, 0.24);
}

.nav-links,
.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links a {
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 640;
}

.nav-links a[aria-current="page"] {
  color: var(--teal-dark);
}

.mobile-nav {
  display: none;
  position: relative;
}

.mobile-nav summary {
  min-height: 42px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(250px, calc(100vw - 28px));
  padding: 8px;
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.mobile-nav-menu a {
  min-height: 44px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  border-radius: 9px;
  color: var(--ink);
  font-weight: 650;
}

.button,
.button-secondary,
.nav-cta {
  min-height: 44px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 730;
}

.button,
.nav-cta {
  color: #ffffff !important;
  background: var(--navy);
  box-shadow: 0 12px 28px rgba(23, 77, 106, 0.22);
}

.button:hover,
.nav-cta:hover {
  background: var(--navy-dark);
}

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

.hero {
  min-height: 710px;
  padding: 76px 0 64px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(500px, 1.08fr);
  gap: 62px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.hero h1 {
  max-width: 650px;
  font-size: clamp(3.25rem, 6.6vw, 6.3rem);
}

.lede {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.2rem, 2vw, 1.52rem);
  line-height: 1.34;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.availability {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--green);
  color: var(--muted);
}

.product-stage {
  position: relative;
  min-height: 590px;
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    linear-gradient(rgba(13, 146, 150, 0.065) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 146, 150, 0.065) 1px, transparent 1px),
    linear-gradient(145deg, #ffffff, #e2f2f4);
  background-size: 42px 42px, 42px 42px, auto;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.binder-window {
  min-height: 500px;
  display: grid;
  grid-template-columns: 0.8fr 1.35fr;
  border: 1px solid rgba(75, 112, 126, 0.34);
  border-radius: 19px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 50px rgba(20, 63, 81, 0.18);
  overflow: hidden;
}

.binder-sidebar {
  padding: 24px 18px;
  color: #eaf8fa;
  background: linear-gradient(180deg, var(--navy-dark), #155d70);
}

.window-dots {
  display: flex;
  gap: 7px;
  margin-bottom: 30px;
}

.window-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.42);
}

.binder-sidebar small {
  color: rgba(234, 248, 250, 0.7);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.env-item {
  margin-top: 12px;
  padding: 12px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.13);
  font-weight: 700;
}

.binder-detail {
  padding: 28px;
}

.binder-detail h2 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.025em;
}

.status-pill {
  margin-top: 13px;
  padding: 8px 11px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  color: #0b6844;
  background: #ddf8ea;
  font-size: 0.84rem;
  font-weight: 750;
}

.status-pill::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  content: "";
}

.mock-card {
  margin-top: 18px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfdfd;
}

.mock-card strong {
  display: block;
}

.mock-row {
  margin-top: 11px;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  color: var(--muted);
  font-size: 0.84rem;
}

.mock-row span:first-child {
  color: var(--ink);
  font-weight: 700;
}

.stage-note {
  position: absolute;
  right: 24px;
  bottom: 24px;
  max-width: 245px;
  padding: 16px 18px;
  border: 1px solid rgba(201, 221, 227, 0.95);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 34px rgba(20, 63, 81, 0.12);
  backdrop-filter: blur(14px);
}

.stage-note strong,
.stage-note span {
  display: block;
}

.stage-note span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.proof-strip {
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.proof-grid {
  padding: 34px 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
}

.proof-grid h2,
.feature-card h3,
.content-card h2 {
  margin: 0;
}

.proof-grid h2 {
  font-size: 1.05rem;
}

.proof-grid p,
.feature-card p,
.content-card p,
.content-card li {
  color: var(--muted);
}

.proof-grid p,
.feature-card p {
  margin: 6px 0 0;
}

.features,
.privacy-callout {
  padding: 82px 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-heading h2,
.privacy-callout h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
}

.section-heading p,
.privacy-callout p {
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-grid,
.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.content-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
}

.feature-card h3 {
  font-size: 1.2rem;
}

.privacy-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
}

.privacy-callout > div {
  max-width: 790px;
}

.page-main {
  min-height: calc(100vh - 160px);
}

.page-hero {
  padding: 72px 0 38px;
  max-width: 870px;
}

.page-hero h1 {
  font-size: clamp(3rem, 6vw, 5.2rem);
}

.page-hero p {
  color: var(--muted);
  font-size: 1.15rem;
}

.content-grid {
  padding-bottom: 80px;
}

.content-card h2 {
  font-size: 1.35rem;
}

.content-card h3 {
  margin: 24px 0 4px;
  font-size: 1.02rem;
}

.content-card ul {
  margin-bottom: 0;
  padding-left: 20px;
}

.guide-hero {
  padding-bottom: 48px;
}

.guide-shell {
  padding-bottom: 88px;
  display: grid;
  grid-template-columns: 245px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.guide-toc {
  position: sticky;
  top: 96px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 42px rgba(19, 68, 82, 0.08);
}

.guide-toc strong {
  display: block;
  margin-bottom: 10px;
}

.guide-toc nav {
  display: grid;
  gap: 2px;
}

.guide-toc a {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 630;
}

.guide-toc a:hover {
  color: var(--teal-dark);
  background: var(--soft);
}

.guide-content {
  min-width: 0;
  max-width: 860px;
}

.guide-section {
  padding: 6px 0 54px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 100px;
}

.guide-section + .guide-section {
  padding-top: 54px;
}

.guide-section:last-child {
  border-bottom: 0;
}

.guide-section h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.guide-section h3 {
  margin: 28px 0 6px;
  font-size: 1.18rem;
}

.guide-section > p,
.guide-section li,
.guide-card p,
.guide-definitions p {
  color: var(--muted);
}

.guide-steps,
.guide-list {
  margin: 22px 0 0;
  padding-left: 24px;
}

.guide-steps li,
.guide-list li {
  padding-left: 5px;
  margin-bottom: 13px;
}

.guide-steps li::marker {
  color: var(--teal-dark);
  font-weight: 800;
}

.guide-callout {
  margin-top: 26px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--teal);
  border-radius: 14px;
  background: var(--soft);
}

.guide-callout-accent {
  border-left-color: var(--amber);
  background: #fff8ef;
}

.guide-callout p {
  margin: 5px 0 0;
  color: var(--muted);
}

.guide-note {
  margin-top: 20px;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
}

.guide-card-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.guide-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
}

.guide-card > span {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--navy);
  font-size: 0.86rem;
  font-weight: 800;
}

.guide-card h3 {
  margin: 14px 0 4px;
}

.guide-card p {
  margin: 0;
}

.guide-definitions {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.guide-definitions > div {
  padding: 22px 0;
  display: grid;
  grid-template-columns: minmax(150px, 0.3fr) minmax(0, 1fr);
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.guide-definitions h3,
.guide-definitions p {
  margin: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #eaf4f6;
}

.footer-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 930px) {
  .nav-links {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 44px;
    padding-top: 54px;
  }

  .proof-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .privacy-callout {
    grid-template-columns: 1fr;
  }

  .guide-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .guide-toc {
    position: static;
  }
}

@media (max-width: 640px) {
  .nav,
  .section,
  .footer-inner {
    width: min(calc(100% - 28px), var(--max));
  }

  .hero {
    padding: 44px 0;
  }

  .hero h1 {
    font-size: clamp(3rem, 15vw, 4.4rem);
  }

  .product-stage {
    min-height: 500px;
    padding: 20px;
    border-radius: 22px;
  }

  .binder-window {
    min-height: 445px;
    grid-template-columns: 1fr;
  }

  .binder-sidebar {
    padding: 18px;
  }

  .window-dots {
    margin-bottom: 15px;
  }

  .binder-detail {
    padding: 20px;
  }

  .mock-row {
    grid-template-columns: 76px 1fr;
  }

  .stage-note {
    right: 14px;
    bottom: 14px;
  }

  .feature-grid,
  .content-grid,
  .guide-card-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-hero {
    padding-bottom: 30px;
  }

  .guide-shell {
    padding-bottom: 58px;
  }

  .guide-section {
    padding-bottom: 42px;
  }

  .guide-section + .guide-section {
    padding-top: 42px;
  }

  .guide-definitions > div {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .features,
  .privacy-callout {
    padding: 58px 0;
  }

  .footer-inner {
    padding: 22px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 12px 18px;
  }
}

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