/* qbit.me × pi.dev Design System — Inter font site-wide */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root, [data-theme="dark"] {
  color-scheme: dark;
  --bg-deep: #161d27;
  --bg-canvas: #161d27;
  --panel: #212730e6;
  --panel-soft: #252f3dd1;
  --text: #ebe7e4;
  --copy: #ebe7e4bf;
  --muted: #9fa4ab;
  --muted-strong: #d5d8db;
  --accent: #6a9fcc;
  --line: #49505980;
  --line-strong: #757d8975;
  --nav-link-color: #d5d8dbb8;
  --white: #ffffff;
  --page-grid-minor: hsl(218 60% 80% / 0.009375);
  --page-grid-major: hsl(218 60% 80% / 0.02625);
  --page-grid-cross: hsl(218 60% 80% / 0.075);
  --page-vignette-overlay: #161d271f;
  --nav-panel-background: linear-gradient(180deg, #212730f7, #0d1116e8), linear-gradient(90deg, #4b607c24, #2f5f8a14);
  --nav-panel-border: #495059bd;
  --nav-panel-highlight: #9fa4ab47;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'Space Mono', 'Commit Mono', SFMono-Regular, ui-monospace, Menlo, Monaco, Consolas, monospace;
  --max-width: 1100px;
  --grid-gap: 4px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-color: var(--bg-deep);
}

body {
  min-height: 100vh;
  background-color: transparent;
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
  text-wrap: pretty;
  overflow-x: clip;
}

/* Grid background matching pi.dev */
body::before {
  content: "";
  position: fixed;
  inset: -8rem;
  z-index: 0;
  pointer-events: none;
  --paper-bg: var(--bg-deep);
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(var(--page-grid-minor) 0 1px, transparent 1px var(--grid-gap)),
    linear-gradient(to right, var(--page-grid-minor) 0 1px, transparent 1px var(--grid-gap)),
    linear-gradient(var(--page-grid-major) 0 1px, transparent 1px calc(var(--grid-gap) * 5)),
    linear-gradient(to right, var(--page-grid-major) 0 1px, transparent 1px calc(var(--grid-gap) * 5)),
    radial-gradient(circle at center, transparent calc(var(--grid-gap) / 2), var(--paper-bg) calc(var(--grid-gap) / 2) 100%),
    linear-gradient(var(--page-grid-cross) 0 1px, transparent 1px calc(var(--grid-gap) * 5)),
    linear-gradient(to right, var(--page-grid-cross) 0 1px, transparent 1px calc(var(--grid-gap) * 5));
  background-size:
    var(--grid-gap) var(--grid-gap),
    var(--grid-gap) var(--grid-gap),
    calc(var(--grid-gap) * 5) calc(var(--grid-gap) * 5),
    calc(var(--grid-gap) * 5) calc(var(--grid-gap) * 5),
    calc(var(--grid-gap) * 5) calc(var(--grid-gap) * 5),
    calc(var(--grid-gap) * 5) calc(var(--grid-gap) * 5),
    calc(var(--grid-gap) * 5) calc(var(--grid-gap) * 5);
  background-position:
    0 0, 0 0, 0 0, 0 0,
    calc(var(--grid-gap) * -2.5) calc(var(--grid-gap) * -2.5),
    0 0, 0 0;
}

body::after {
  content: "";
  position: fixed;
  inset: -8rem;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, var(--page-vignette-overlay), var(--bg-deep) 90%);
}

nav, .hero, .section, .cta-section, footer, .detail-page {
  position: relative;
  z-index: 1;
}

a { color: var(--text); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; transition: color 0.2s; }
a:hover { color: var(--white); text-decoration-color: var(--accent); }

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.8rem 24px 0;
  pointer-events: auto;
}

nav .inner {
  max-width: 96rem;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.95rem;
  background: var(--nav-panel-background);
  border: 1px solid var(--nav-panel-border);
  border-top-color: var(--nav-panel-highlight);
  border-radius: 4.5px;
}

nav .logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font);
  font-weight: 500;
  font-size: 1.1rem;
  color: #58a9f9;
  text-decoration: none;
  flex-shrink: 0;
}

nav .logo img { height: 48px; width: auto; }

nav .theme-toggle {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 4.5px;
  background: transparent;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

nav .theme-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
  background: rgba(255,255,255,0.04);
}

nav .logo-me {
  color: #376cb5;
  font-weight: 500;
}

nav .links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.65rem, 1.5vw, 1.25rem);
}

nav .links a {
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--nav-page-link-color, #d5d8dbb8);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

nav .links a:hover { color: var(--text); text-decoration: none; }

nav .links a.active {
  color: #58a9f9;
}
nav .get-started {
  padding: 0.35rem 0.7rem;
  background: rgba(255,255,255,0.04);
  border-radius: 4.5px;
  letter-spacing: 0.12em;
}

nav .get-started:hover {
  background: rgba(255,255,255,0.07);
  color: var(--text);
  text-decoration: none;
}

nav .menu-toggle {
  display: none;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line);
  border-radius: 4.5px;
  background: transparent;
  color: var(--muted);
  font-size: 1.1rem;
  cursor: pointer;
}

nav .menu-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
  background: rgba(255,255,255,0.04);
}

@media (max-width: 860px) {
  nav .links {
    position: static;
    transform: none;
    order: 3;
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--line);
  }

  nav .links.open {
    display: flex;
  }

  nav .links a {
    padding: 0.75rem 0;
    font-size: 0.8rem;
    border-bottom: 1px solid var(--line);
  }

  nav .links a:last-child { border-bottom: none; }

  nav .menu-toggle { display: grid; place-items: center; }

  nav .inner {
    flex-wrap: wrap;
  }

  nav .get-started {
    background: transparent;
    padding: 0.75rem 0;
  }
}

/* Hero */
.hero {
  padding: 180px 24px 80px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero .logo-mark { margin-bottom: 48px; }

.hero .logo-mark img { height: 100px; width: auto; }

.hero h1 {
  font-family: var(--font);
  font-size: clamp(1.7rem, 6vw, 2.6rem);
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero h1 .highlight { font-style: italic; color: #58a9f9; }

.hero p {
  font-size: clamp(0.95rem, 3vw, 1.05rem);
  color: var(--copy);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.55;
}

.hero .actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 4.5px;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.78rem;
  letter-spacing: 0.8px;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: rgba(255,255,255,0.04);
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 1.1px;
}

.btn-primary:hover { background: rgba(255,255,255,0.07); color: var(--white); text-decoration: none; }

.btn-secondary {
  background: transparent;
  color: var(--copy);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

.btn-secondary:hover { color: var(--text); text-decoration: none; }

/* Section */
.section {
  padding: 64px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text);
}

.section-header p {
  color: var(--copy);
  font-size: 0.95rem;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.55;
}

/* Pillar cards */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.pillar-card {
  background: var(--panel);
  border-radius: 4.5px;
  padding: 36px 28px;
  transition: background 0.2s;
}

.pillar-card:hover { background: var(--panel-soft); }

.pillar-card .icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.pillar-card h3 {
  font-family: var(--font);
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--text);
}

.pillar-card p {
  color: var(--copy);
  font-size: 0.88rem;
  line-height: 1.55;
}

.pillar-card .tagline {
  display: block;
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  margin-bottom: 12px;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  counter-reset: step;
}

.step {
  background: var(--panel);
  border-radius: 4.5px;
  padding: 36px 28px;
  position: relative;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.9px;
  color: var(--muted);
  display: block;
  margin-bottom: 8px;
}

.step h3 {
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--text);
}

.step p {
  font-size: 0.88rem;
  color: var(--copy);
  line-height: 1.55;
}

/* Use cases */
.use-cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.use-case {
  background: var(--panel);
  border-radius: 4.5px;
  padding: 28px 24px;
  transition: background 0.2s;
}

.use-case:hover { background: var(--panel-soft); }

.use-case h4 {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text);
}

.use-case p {
  font-size: 0.85rem;
  color: var(--copy);
  line-height: 1.55;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-top: 40px;
}

.pricing-card {
  background: var(--panel);
  border-radius: 4.5px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: background 0.2s;
}

.pricing-card:hover { background: var(--panel-soft); }

.pricing-card.featured { position: relative; }

.pricing-card.featured::before {
  content: "Most Popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg-deep);
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1.1px;
  padding: 4px 14px;
  border-radius: 4.5px;
}

.pricing-card .tier-name {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: var(--muted);
  margin-bottom: 8px;
}

.pricing-card .tier-who {
  font-size: 0.85rem;
  color: var(--copy);
  margin-bottom: 20px;
}

.pricing-card .price {
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text);
}

.pricing-card .price-sub {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 24px;
}

.pricing-card .features { list-style: none; flex: 1; }

.pricing-card .features li {
  padding: 8px 0;
  font-size: 0.85rem;
  color: var(--copy);
  border-bottom: 1px solid var(--line);
}

.pricing-card .features li:last-child { border-bottom: none; }

.pricing-card .features li::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-right: 8px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='10' fill='%236a9fcc' opacity='0.15'/%3E%3Cpath d='M8 12l3 3 5-6' stroke='%236a9fcc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: contain;
  vertical-align: middle;
}

.pricing-card .btn { margin-top: 24px; width: 100%; text-align: center; }

.pricing-note {
  text-align: center;
  color: var(--copy);
  font-size: 0.85rem;
  max-width: 700px;
  margin: 40px auto 0;
  line-height: 1.55;
  padding: 24px;
  background: var(--panel);
  border-radius: 4.5px;
}

/* CTA */
.cta-section {
  text-align: center;
  padding: 80px 24px;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text);
}

.cta-section p {
  color: var(--copy);
  font-size: 1rem;
  margin-bottom: 32px;
  line-height: 1.55;
}

/* Get Started page */
.get-started-options {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.get-started-card {
  background: var(--panel);
  border-radius: 4.5px;
  padding: 40px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.get-started-icon {
  margin: 0 auto 24px;
}

.get-started-card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text);
}

.get-started-card p {
  color: var(--copy);
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 24px;
  flex: 1;
}

.get-started-price {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 20px;
}

.get-started-code {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 4.5px;
  padding: 10px 14px;
  text-align: left;
  font-size: 0.68rem;
  margin: 0 0 6px;
  overflow-x: auto;
  line-height: 1.5;
  font-family: var(--mono);
  color: var(--copy);
  white-space: pre-wrap;
  word-break: break-all;
}

.get-started-code-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0;
}

.already-have-device {
  text-align: center;
  margin-top: 48px;
}

.already-have-device p {
  font-size: 0.9rem;
  color: var(--copy);
}

.what-happens-next {
  max-width: 900px;
  margin: 64px auto 0;
}

.what-happens-next h2 {
  font-family: var(--font);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 32px;
  color: var(--text);
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
  padding: 40px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

footer .inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

footer .brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

footer .brand img { height: 28px; width: auto; }

footer .brand .logo-text {
  font-family: var(--font);
  font-weight: 500;
  font-size: 0.95rem;
  color: #58a9f9;
}

footer .brand .logo-me {
  color: #376cb5;
}

footer .links { display: flex; gap: 20px; }

footer .links a {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: var(--muted);
  text-decoration: none;
}

footer .links a:hover { color: var(--text); text-decoration: none; }

/* Detail pages */
.detail-page { padding-top: 80px; position: relative; z-index: 1; }

.detail-hero {
  padding: 100px 32px 60px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 32px;
  background: var(--panel);
  border-radius: 4.5px;
  border-top: 2px solid var(--accent);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.detail-hero h1 {
  font-family: var(--font);
  font-size: 2.4rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: #58a9f9;
}

.detail-hero p {
  font-size: 1.05rem;
  color: var(--copy);
  line-height: 1.55;
  max-width: 600px;
  margin: 0 auto;
}

.detail-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.detail-content h2 {
  font-family: var(--font);
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 56px 0 16px;
  color: var(--text);
}

.detail-content h3 {
  font-family: var(--font);
  font-size: 1.15rem;
  font-weight: 500;
  margin: 32px 0 12px;
  color: var(--text);
}

.detail-content p {
  color: var(--copy);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 16px;
}

.detail-content ul { list-style: none; margin: 16px 0 24px; }

.detail-content ul li {
  padding: 6px 0;
  color: var(--copy);
  font-size: 0.9rem;
  line-height: 1.55;
}

.detail-content ul li::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 10px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M5 12h14M13 5l7 7-7 7' stroke='%236a9fcc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: contain;
  vertical-align: middle;
}

.detail-content .highlight-box {
  background: var(--panel);
  border-left: 2px solid var(--accent);
  border-radius: 4.5px;
  padding: 20px 24px;
  margin: 24px 0;
}

.detail-content .highlight-box p { margin-bottom: 0; font-size: 0.88rem; color: var(--text); }

/* Tables */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 24px 0;
  font-size: 0.95rem;
  border: 1px solid var(--line);
  border-radius: 4.5px;
  overflow: hidden;
  background: var(--panel);
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(255,255,255,0.03);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: rgba(255,255,255,0.03);
}

[data-theme="light"] table {
  background: #ffffff;
}

[data-theme="light"] th {
  background: rgba(0,0,0,0.02);
}

[data-theme="light"] tbody tr:hover {
  background: rgba(0,0,0,0.02);
}

@media (max-width: 700px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

/* Pipeline */
.pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 48px 0;
  flex-wrap: wrap;
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  background: var(--panel);
  border-radius: 4.5px;
  min-width: 90px;
}

.pipeline-step .step-icon { font-size: 1.3rem; }

.pipeline-step .step-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.9px;
  color: var(--muted);
}

.pipeline-arrow { color: var(--accent); font-size: 1.2rem; padding: 0 6px; }

/* Presence indicator */
.presence {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.presence span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.4;
  animation: breathe 2.4s ease-in-out infinite;
}

.presence span:nth-child(2) { animation-delay: 0.3s; }
.presence span:nth-child(3) { animation-delay: 0.6s; }

@keyframes breathe {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.15); }
}

/* Focus */
button:focus-visible, input:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Light mode */
[data-theme="light"] {
  color-scheme: light;
  --bg-deep: #dacbc2;
  --bg-canvas: #ebe7e4;
  --panel: #f4f2f0;
  --panel-soft: #eef1f3;
  --text: #252f3df5;
  --copy: #384251dc;
  --muted: #5c5752c4;
  --muted-strong: #394352d6;
  --accent: #4b607c;
  --line: #8b847d59;
  --line-strong: #5c575240;
  --nav-page-link-color: #252f3db8;
  --page-grid-minor: #252f3d08;
  --page-grid-major: #252f3d12;
  --page-grid-cross: #252f3d1d;
  --page-vignette-overlay: #ebe7e426;
  --nav-panel-background: linear-gradient(180deg, #f3f2f0f4, #ebe7e4ee), linear-gradient(90deg, #eacd7c20, #4b607c12);
  --nav-panel-border: #b3ada7cf;
  --nav-panel-highlight: #f3f2f0;
  --white: #000000;
}

[data-theme="light"] nav .theme-toggle:hover {
  background: rgba(0,0,0,0.04);
}

[data-theme="light"] .pricing-card.featured::before {
  background: var(--text);
  color: var(--bg-deep);
}

/* Responsive */
@media (max-width: 900px) {
  html { font-size: 16px; }
  .pillars, .use-cases, .steps, .pricing-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.9rem; }
  .section-header h2, .detail-hero h1 { font-size: 1.6rem; }
  .pipeline { flex-direction: column; gap: 8px; }
  .pipeline-arrow { transform: rotate(90deg); }
  .detail-hero { padding: 80px 24px 48px; }
  .detail-hero h1 { font-size: 1.8rem; }
  .detail-content h2 { font-size: 1.4rem; }
}

@media (max-width: 700px) {
  html { font-size: 15px; }
  .hero { padding: 120px 16px 60px; }
  .hero h1 { font-size: 1.5rem; }
  .hero p { margin-bottom: 28px; }
  .section { padding: 48px 16px; }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 1.5rem; }
  .pillar-card, .use-case, .pricing-card, .step { padding: 24px 20px; }
  .pillar-card .icon { width: 36px; height: 36px; margin-bottom: 14px; }
  .pillar-card h3 { font-size: 1.1rem; }
  .pricing-card .price { font-size: 1.6rem; }
  .pricing-card .features li { font-size: 0.82rem; }
  .pricing-note { padding: 18px; margin-top: 28px; }
  .detail-page { padding-top: 64px; }
  .detail-hero { padding: 64px 20px 40px; margin-bottom: 24px; border-radius: 0; }
  .detail-hero h1 { font-size: 1.6rem; }
  .detail-hero p { font-size: 1rem; }
  .detail-content { padding: 0 16px 60px; }
  .detail-content h2 { font-size: 1.35rem; margin-top: 40px; }
  .detail-content h3 { font-size: 1.05rem; }
  .detail-content ul li { font-size: 0.85rem; }
  .highlight-box { padding: 16px 18px; }
  footer { padding: 32px 16px; }
  footer .inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  footer .links { flex-wrap: wrap; gap: 14px; }
  .btn { padding: 10px 18px; font-size: 0.72rem; }
  .hero .actions { gap: 10px; }
  table { font-size: 0.85rem; }
  th, td { padding: 10px 12px; }
  code { word-break: break-word; }
  .get-started-options { grid-template-columns: 1fr; }
  .get-started-card { padding: 28px 20px; }
  .get-started-price { font-size: 0.78rem; }
  .what-happens-next h2 { font-size: 1.4rem; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 1.4rem; }
  nav .logo { font-size: 1rem; }
  nav .logo img { height: 36px; }
}