:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --paper: #ffffff;
  --paper-2: #f0f3f6;
  --ink: #111827;
  --ink-2: #253041;
  --muted: #5f6b7a;
  --muted-2: #8792a0;
  --line: #dce2e9;
  --line-2: #c8d1dc;
  --accent: #1f4f82;
  --accent-2: #0b6b5c;
  --accent-3: #8a6721;
  --danger: #a43d37;
  --success: #1f6f43;
  --code-bg: #111827;
  --code-text: #e5e7eb;
  --shadow-sm: 0 8px 24px rgba(17, 24, 39, 0.08);
  --shadow: 0 22px 70px rgba(17, 24, 39, 0.12);
  --radius: 8px;
  --radius-sm: 6px;
  --shell: 1180px;
  --header: 76px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, rgba(17, 24, 39, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(17, 24, 39, 0.032) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.3), transparent 70%);
}

:focus-visible {
  outline: 3px solid rgba(31, 79, 130, 0.85);
  outline-offset: 3px;
}

::selection {
  background: rgba(31, 79, 130, 0.18);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  transform: translateY(-180%);
  transition: transform 160ms var(--ease);
}

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

.shell {
  width: min(100% - 40px, var(--shell));
  margin-inline: auto;
}

.section {
  padding: 104px 0;
  position: relative;
}

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

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 1px;
  content: "";
  background: currentColor;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  line-height: 1.08;
}

.section-heading h2,
.final-box h2 {
  font-size: 2.8rem;
  font-weight: 820;
}

.section-heading p:not(.eyebrow) {
  margin-top: 16px;
  color: var(--muted);
  font-size: 1.03rem;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  background: rgba(246, 247, 249, 0.86);
  backdrop-filter: blur(18px);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.site-header.is-scrolled,
.site-header.is-open {
  border-color: var(--line);
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.06);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--accent);
  font-weight: 850;
  box-shadow: var(--shadow-sm);
}

.brand span:last-child {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: 0.98rem;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 0.76rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a,
.tech-toggle {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 11px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 760;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}

.main-nav a:hover,
.main-nav a.is-active,
.tech-toggle:hover,
.tech-toggle[aria-pressed="true"] {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--line);
}

.main-nav .nav-cta {
  margin-left: 4px;
  border-color: var(--accent);
  color: var(--accent);
  background: var(--paper);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 160ms var(--ease);
}

.nav-toggle span + span {
  margin-top: 6px;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 122px 0 72px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(246, 247, 249, 0.92)),
    linear-gradient(120deg, rgba(31, 79, 130, 0.06), transparent 54%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.62fr);
  gap: 70px;
  align-items: center;
}

.hero-title {
  font-size: 5.4rem;
  font-weight: 850;
}

.hero-lead {
  max-width: 820px;
  margin-top: 22px;
  color: var(--ink-2);
  font-size: 1.46rem;
  line-height: 1.3;
  font-weight: 700;
}

.hero-text {
  max-width: 760px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 1.06rem;
}

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

.btn,
.btn-small {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 18px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font-weight: 780;
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.btn-small {
  min-height: 40px;
  padding-inline: 13px;
  font-size: 0.88rem;
}

.btn:hover,
.btn-small:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  color: var(--accent);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 820px;
  margin-top: 34px;
}

.hero-metrics div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.75);
}

.hero-metrics dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
}

.hero-metrics dd {
  margin: 6px 0 0;
  color: var(--ink);
  font-weight: 800;
}

.hero-card {
  position: relative;
}

.portrait-frame {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.portrait-frame img {
  width: 100%;
  height: clamp(410px, 58vh, 530px);
  object-fit: cover;
  object-position: center 34%;
  border-radius: var(--radius-sm);
}

.credential-card {
  position: absolute;
  right: -22px;
  bottom: 34px;
  max-width: 270px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
}

.credential-card span,
.case-label,
.module-label {
  display: block;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 820;
  text-transform: uppercase;
}

.credential-card strong {
  display: block;
  margin-top: 5px;
  font-size: 0.95rem;
  line-height: 1.35;
}

.split-layout {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 54px;
  align-items: start;
}

.profile-copy {
  color: var(--muted);
  font-size: 1.05rem;
}

.profile-copy p + p {
  margin-top: 16px;
}

.profile-principles {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.principle-card,
.stack-card,
.career-card,
.case-card,
.example-card,
.process-list li,
.final-box,
.mode-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 0 0 rgba(17, 24, 39, 0);
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease), border-color 160ms var(--ease);
}

.principle-card:hover,
.stack-card:hover,
.career-card:hover,
.example-card:hover,
.process-list li:hover {
  transform: translateY(-2px);
  border-color: var(--line-2);
  box-shadow: var(--shadow-sm);
}

.principle-card {
  padding: 20px;
  min-height: 156px;
}

.principle-card h3,
.stack-card h3,
.career-card h3,
.example-card h3 {
  font-size: 1.04rem;
}

.principle-card p,
.stack-card p,
.career-card p,
.example-card p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.92rem;
}

.stack {
  background: var(--paper);
  border-block: 1px solid var(--line);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 44px;
}

.stack-card {
  padding: 22px;
}

.stack-card.is-core {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 0.6fr 1.4fr;
  gap: 24px;
  align-items: start;
  background: #f9fafb;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag-list span,
.case-badges span,
.status-chip {
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-2);
  color: var(--ink-2);
  font-size: 0.8rem;
  font-weight: 700;
}

.career-grid {
  display: grid;
  gap: 18px;
  margin-top: 44px;
}

.career-card {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 28px;
  padding: 26px;
}

.career-meta {
  display: grid;
  align-content: start;
  gap: 8px;
}

.career-period {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 820;
  text-transform: uppercase;
}

.career-role {
  color: var(--ink-2);
  font-weight: 800;
}

.career-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.case-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 32px;
  align-items: end;
}

.mode-panel {
  padding: 18px;
  background: #f9fafb;
}

.mode-panel p {
  margin: 8px 0 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.case-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.case-filters button,
.case-action,
.tab-button {
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
  color: var(--ink-2);
  font-weight: 750;
  transition: background 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease);
}

.case-filters button:hover,
.case-filters button.is-active,
.case-action:hover,
.case-action.is-active,
.tab-button:hover,
.tab-button.is-active {
  border-color: var(--accent);
  background: #eef4fb;
  color: var(--accent);
}

.case-list {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.case-card {
  padding: 28px;
}

.case-card.is-hidden {
  display: none;
}

.case-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: start;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.case-header h3 {
  margin-top: 10px;
  font-size: 1.8rem;
}

.case-header p {
  max-width: 830px;
  margin-top: 10px;
  color: var(--muted);
}

.case-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: 340px;
}

.case-body {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(390px, 1.05fr);
  gap: 20px;
  margin-top: 22px;
}

.case-analysis {
  display: grid;
  gap: 14px;
}

.analysis-panel,
.simulation-panel,
.code-panel,
.technical-details,
.log-panel,
.payload-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfd;
}

.analysis-panel,
.technical-details,
.log-panel,
.payload-panel {
  padding: 18px;
}

.analysis-panel h4,
.simulation-panel h4,
.code-panel h4,
.technical-details h4,
.log-panel h4,
.payload-panel h4 {
  font-size: 0.96rem;
}

.analysis-panel ul,
.technical-details ul {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.technical-details {
  display: none;
}

body.is-technical .technical-details {
  display: block;
}

.case-workspace {
  display: grid;
  gap: 14px;
}

.simulation-panel {
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.panel-head p {
  color: var(--muted);
  font-size: 0.88rem;
}

.action-row,
.code-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.simulation-output {
  min-height: 300px;
  padding: 16px;
}

.status-board {
  display: grid;
  gap: 10px;
}

.status-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.status-row.is-active {
  border-color: var(--accent);
  background: #eef4fb;
}

.status-row strong {
  color: var(--ink-2);
}

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

.semantic-tree,
.architecture-map,
.state-map,
.priority-grid,
.queue-list,
.pipeline-steps,
.risk-rules {
  display: grid;
  gap: 10px;
}

.tree-node,
.arch-node,
.state-node,
.priority-card,
.queue-item,
.pipeline-step,
.risk-rule {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.tree-node.is-highlighted,
.arch-node.is-active,
.state-node.is-active,
.priority-card.is-active,
.queue-item.is-active,
.pipeline-step.is-active,
.risk-rule.is-blocked {
  border-color: var(--accent);
  background: #eef4fb;
}

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

.priority-card {
  min-height: 110px;
}

.priority-card small,
.queue-item small,
.pipeline-step small,
.risk-rule small {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
}

.mock-device {
  max-width: 330px;
  margin-inline: auto;
  padding: 14px;
  border: 1px solid var(--line-2);
  border-radius: 22px;
  background: var(--paper);
}

.mock-device[data-size="desktop"] {
  max-width: none;
  border-radius: var(--radius);
}

.mock-screen {
  min-height: 250px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8fafc;
  padding: 14px;
}

.mock-bar,
.mock-line {
  height: 12px;
  border-radius: 99px;
  background: #dbe3ec;
}

.mock-line {
  margin-top: 10px;
}

.mock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 16px;
}

.mock-device[data-size="mobile"] .mock-grid {
  grid-template-columns: 1fr;
}

.mock-block {
  min-height: 74px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.mock-block.is-priority {
  border-color: var(--accent);
  background: #eef4fb;
}

.code-panel {
  overflow: hidden;
}

.code-tabs {
  padding: 12px;
}

.tab-button {
  min-height: 34px;
  font-size: 0.78rem;
}

.code-panel pre,
.payload-panel pre,
.log-panel pre {
  margin: 0;
  overflow: auto;
  color: var(--code-text);
  background: var(--code-bg);
  font-size: 0.82rem;
  line-height: 1.62;
  tab-size: 2;
}

.code-panel pre {
  max-height: 420px;
  min-height: 300px;
  padding: 16px;
}

.payload-panel pre,
.log-panel pre {
  max-height: 230px;
  padding: 14px;
  border-radius: var(--radius-sm);
}

.payload-panel,
.log-panel {
  display: none;
}

body.is-technical .payload-panel,
body.is-technical .log-panel {
  display: block;
}

.advanced-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 44px;
}

.example-card {
  display: grid;
  grid-template-rows: auto auto 1fr;
  min-height: 560px;
  padding: 22px;
}

.example-header {
  display: grid;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.example-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.example-output {
  display: grid;
  gap: 12px;
}

.example-card > .code-panel {
  display: none;
}

.example-card > .code-panel.is-open,
body.is-technical .example-card > .code-panel {
  display: block;
}

.mini-chart {
  display: flex;
  align-items: end;
  gap: 8px;
  height: 150px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfd;
}

.mini-chart span {
  flex: 1;
  min-height: 12px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: var(--accent);
  opacity: 0.78;
}

.process {
  background: var(--paper);
  border-block: 1px solid var(--line);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 0;
  list-style: none;
}

.process-list li {
  min-height: 104px;
  padding: 18px;
}

.process-list span {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 820;
}

.process-list h3 {
  margin-top: 16px;
  font-size: 1rem;
}

.final-cta {
  padding: 104px 0;
}

.final-box {
  padding: 48px;
  background:
    linear-gradient(135deg, rgba(31, 79, 130, 0.08), transparent 42%),
    var(--paper);
}

.final-box h2 {
  max-width: 930px;
}

.final-box p:not(.eyebrow) {
  margin: 16px 0 26px;
  color: var(--muted);
}

.site-footer {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-shell a {
  color: var(--accent);
  font-weight: 780;
}

.mobile-whatsapp,
.back-top {
  position: fixed;
  z-index: 90;
  right: 18px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--accent);
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

.back-top {
  bottom: 20px;
  min-height: 42px;
  padding: 0 13px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease);
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-whatsapp {
  display: none;
  left: 14px;
  right: 14px;
  bottom: 14px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease);
}

.mobile-whatsapp.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

[data-technical-extra] {
  display: none;
}

body.is-technical [data-technical-extra] {
  display: block;
}