/* ==========================================================================
   Harion Research — Editorial & Research-Journal Design System
   Static HTML/CSS/JS · Zero Framework · WCAG AA Compliant
   ========================================================================== */

:root {
  /* Surfaces & Borders */
  --bg: #FAFAF7;
  --bg-alt: #FFFFFF;
  --bg-subtle: #F3F3EE;
  --border: #E5E5E0;
  --border-hover: #C8C8C0;
  --border-dark: #14181F;
  --footer-bg: #0F1419;

  /* Typography Colors (WCAG AA verified on #FAFAF7 and #FFFFFF) */
  --ink: #14181F;
  --text-sec: #4B5563;
  --text-muted: #6B7280;

  /* Brand Accents (from Harion logo) */
  --blue: #1D4ED8;
  --blue-hover: #1E40AF;
  --blue-tint: #EFF6FF;
  --teal: #0F766E;
  --teal-hover: #115E59;
  --teal-tint: #F0FDFA;

  /* Font Stacks */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', Times, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Fluid Type Scale */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1.0625rem;  /* 17px */
  --text-lg: 1.1875rem;    /* 19px */
  --text-xl: clamp(1.25rem, 1.8vw, 1.5rem);
  --text-2xl: clamp(1.625rem, 2.6vw, 2.125rem);
  --text-3xl: clamp(2.125rem, 3.8vw, 3rem);

  /* 8px Spacing Grid */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 40px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-10: 80px;
  --sp-12: 96px;

  /* Radii & Shadows */
  --radius-sm: 6px;
  --radius: 12px;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04);
  --container: 1120px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p, li, td, th, dd, blockquote {
  overflow-wrap: break-word;
}

img, picture, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-2);
  background: var(--blue);
  color: #FFFFFF;
  padding: var(--sp-1) var(--sp-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--sp-2);
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

/* Focus Rings */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* Typography */
h1, h2, .serif-title {
  font-family: var(--font-serif);
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 var(--sp-2);
}

h1 {
  font-size: var(--text-3xl);
  line-height: 1.15;
}

h2 {
  font-size: var(--text-2xl);
  line-height: 1.22;
}

h3, h4 {
  font-family: var(--font-sans);
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-1);
}

h3 {
  font-size: var(--text-lg);
  line-height: 1.35;
}

h4 {
  font-size: var(--text-base);
  line-height: 1.4;
}

p {
  margin: 0 0 var(--sp-2);
  max-width: 70ch;
  color: var(--text-sec);
}

p:last-child {
  margin-bottom: 0;
}

.lede {
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--text-sec);
  max-width: 64ch;
  margin-bottom: var(--sp-3);
}

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

.muted {
  color: var(--text-muted);
}

.quiet-note {
  margin-top: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

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

/* Mono / Data Accents */
.mono, code, .kicker, .tag, .stat-val {
  font-family: var(--font-mono);
}

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin: 0 0 var(--sp-2);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  line-height: 1.4;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-sec);
  font-weight: 500;
}

.tag-teal {
  background: var(--teal-tint);
  border-color: rgba(15, 118, 110, 0.25);
  color: var(--teal);
}

.tag-blue {
  background: var(--blue-tint);
  border-color: rgba(29, 78, 216, 0.25);
  color: var(--blue);
}

/* Containers & Sections */
.w {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-3);
}

.narrow {
  max-width: 740px;
}

section {
  padding: var(--sp-10) 0;
  border-bottom: 1px solid var(--border);
}

section.alt {
  background-color: var(--bg-alt);
}

section.compact {
  padding: var(--sp-6) 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.section-head h2 {
  margin-bottom: 0;
}

/* Header & Navigation */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: var(--sp-2);
}

.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-link img {
  height: 38px;
  width: auto;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  color: var(--ink);
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-sec);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-left: var(--sp-2);
  border-left: 1px solid var(--border);
}

.nav-sec-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  white-space: nowrap;
}

.nav-sec-link:hover {
  color: var(--blue);
}

/* Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.3;
  border-radius: var(--radius-sm);
  border: 1px solid var(--blue);
  background-color: var(--blue);
  color: #FFFFFF;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background-color: var(--blue-hover);
  border-color: var(--blue-hover);
  color: #FFFFFF;
}

/* Equal visual weight partner button (Hero & Dual CTA) */
.btn-equal,
.btn.o {
  background-color: var(--bg-alt);
  color: var(--ink);
  border: 1px solid var(--ink);
}

.btn-equal:hover,
.btn.o:hover {
  background-color: var(--bg-subtle);
  border-color: var(--blue);
  color: var(--blue);
}

.btn-teal {
  background-color: var(--teal);
  border-color: var(--teal);
  color: #FFFFFF;
}

.btn-teal:hover {
  background-color: var(--teal-hover);
  border-color: var(--teal-hover);
  color: #FFFFFF;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8125rem;
  white-space: nowrap;
}

/* Hero Section */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: var(--sp-6) 0;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--sp-6);
  align-items: center;
}

.hero-grid.text-only {
  grid-template-columns: 1fr;
  max-width: 780px;
}

.hero-bg-decor {
  position: absolute;
  right: max(2%, calc((100vw - 1120px) / 2));
  top: 50%;
  transform: translateY(-50%);
  width: min(460px, 42vw);
  opacity: 0.85;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.hero-graphic-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-graphic {
  width: 100%;
  max-width: 460px;
  height: auto;
  opacity: 0.95;
  mix-blend-mode: multiply;
}

/* Proof / Stat Strip */
.proof-strip {
  padding: var(--sp-4) 0;
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-4);
}

.stat-item {
  border-left: 2px solid var(--teal);
  padding-left: var(--sp-2);
}

.stat-val {
  display: block;
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.4;
}

/* Two Product Lanes Side by Side (Open Two-Column Block, Not Dark Cards) */
.two-lanes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: stretch;
}

.lane-col {
  border-top: 2px solid var(--ink);
  padding-top: var(--sp-3);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.lane-col.lane-accent {
  border-top-color: var(--blue);
}

/* Open Layouts: Ruled Lists, Top-Bordered Columns, Workflow Steps */
.ruled-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.ruled-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: var(--sp-3);
  align-items: baseline;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border);
}

.ruled-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.ruled-body h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: 6px;
}

.ruled-body h3 a {
  color: var(--ink);
  text-decoration: none;
}

.ruled-body h3 a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.ruled-body p {
  font-size: var(--text-base);
  margin: 0;
}

.empty-notice {
  padding: var(--sp-3) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--text-sec);
  font-size: var(--text-base);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

/* Open Top-Bordered Columns (prefer over boxes) */
.open-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-4);
}

.open-col {
  border-top: 1px solid var(--border);
  padding-top: var(--sp-2);
}

.open-col-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--teal);
  margin-bottom: var(--sp-1);
}

/* Horizontal Numbered Workflow Strip */
.workflow-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-2);
  margin: var(--sp-4) 0 var(--sp-2);
  padding: 0;
  list-style: none;
}

.workflow-step {
  border-top: 2px solid var(--ink);
  padding-top: var(--sp-2);
}

.workflow-step .step-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--teal);
  margin-bottom: 4px;
}

.workflow-step strong {
  display: block;
  font-size: var(--text-base);
  color: var(--ink);
  margin-bottom: 4px;
}

.workflow-step span {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-sec);
  line-height: 1.45;
}

/* Cards (used selectively) */
.card, .c {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  box-shadow: var(--shadow-card);
  transition: border-color 0.15s ease;
}

.card:hover, .c:hover {
  border-color: var(--border-hover);
}

.card-grid, .g {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--sp-3);
}

/* Two-Column Split Section */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: start;
}

/* Sidebar Layout (for Program & Methodology pages) */
.with-sidebar {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--sp-6);
  align-items: start;
}

.with-toc {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--sp-6);
  align-items: start;
}

.sticky-box {
  position: sticky;
  top: 96px;
}

/* Spec Key-Value List (.spec-list / .f) */
.spec-list, .f {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.spec-list li, .f li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-2);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: var(--text-sm);
}

.spec-list span, .f span {
  color: var(--text-muted);
}

.spec-list b, .spec-list strong, .f b {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--ink);
  font-weight: 500;
  text-align: right;
}

/* Plain Editorial Bullet List */
.plain-list {
  margin: var(--sp-2) 0 var(--sp-3);
  padding-left: 20px;
  color: var(--text-sec);
}

.plain-list li {
  margin-bottom: var(--sp-1);
}

/* Data Tables */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--sp-3) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
}

table.data-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--text-sm);
}

table.data-table th,
table.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.data-table th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--bg);
  font-weight: 500;
}

table.data-table tr:last-child td {
  border-bottom: none;
}

/* Collapsible Details / Modules / FAQ */
.details-group {
  border-top: 1px solid var(--border);
}

details.collapse-item {
  border-bottom: 1px solid var(--border);
  padding: var(--sp-2) 0;
}

details.collapse-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--ink);
  font-size: var(--text-base);
}

details.collapse-item summary::-webkit-details-marker {
  display: none;
}

details.collapse-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--text-muted);
  flex-shrink: 0;
}

details.collapse-item[open] summary::after {
  content: "−";
}

details.collapse-item .collapse-body {
  padding-top: var(--sp-2);
  color: var(--text-sec);
  font-size: var(--text-base);
}

/* Notices & Disclaimers */
.notice-banner {
  padding: var(--sp-2) var(--sp-3);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-sec);
  margin-bottom: var(--sp-4);
}

/* Plain Testimonial (No decorative quote marks) */
blockquote.editorial-quote {
  margin: 0;
  padding: 0 0 0 var(--sp-3);
  border-left: 2px solid var(--ink);
  max-width: 72ch;
}

blockquote.editorial-quote p {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: var(--sp-2);
}

blockquote.editorial-quote cite {
  display: block;
  font-family: var(--font-sans);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* Dual CTA Band (Light Background) & Cross-Promo Strip */
.dual-cta-band {
  background-color: var(--bg-alt);
  padding: var(--sp-8) 0;
  border-bottom: 1px solid var(--border);
}

.dual-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.cross-promo-strip {
  background-color: var(--bg-subtle);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: var(--text-sm);
}

.cross-promo-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

/* Forms */
.form-field {
  margin-bottom: var(--sp-2);
}

label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  display: block;
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--ink);
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--blue);
  outline: none;
  box-shadow: 0 0 0 2px rgba(29, 78, 216, 0.15);
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

/* Footer (Only dark surface on the site: #0F1419) */
footer.site-footer {
  background-color: var(--footer-bg);
  color: #D1D5DB;
  padding: var(--sp-8) 0 var(--sp-5);
  font-size: var(--text-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--sp-5);
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: var(--sp-4);
}

.footer-col-title {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  margin-bottom: var(--sp-2);
  font-weight: 600;
}

.footer-col p {
  color: #9CA3AF;
  font-size: var(--text-sm);
  line-height: 1.7;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #D1D5DB;
  text-decoration: none;
}

.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-legal {
  color: #9CA3AF;
  font-size: var(--text-xs);
  line-height: 1.65;
}

.footer-legal p {
  color: #9CA3AF;
  max-width: 100%;
  margin-bottom: var(--sp-1);
}

.hero-grid > *,
.two-lanes > *,
.split-grid > *,
.with-sidebar > *,
.with-toc > *,
.open-cols > *,
.card-grid > *,
.g > * {
  min-width: 0;
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .hero-grid,
  .two-lanes,
  .split-grid,
  .with-sidebar,
  .with-toc {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }

  /* Disable sticky positioning on mobile so sidebars never cover the viewport */
  .sticky-box {
    position: static;
  }

  /* Move program summary sidebar to top block on mobile */
  .with-sidebar > aside {
    order: -1;
  }

  .workflow-strip {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-3);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .burger {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: var(--sp-3);
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-2);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links a {
    display: block;
    padding: 12px 0;
    font-size: var(--text-base);
    border-bottom: none;
  }

  .nav-actions {
    border-left: none;
    padding-left: 0;
    padding-top: var(--sp-1);
    width: 100%;
  }

  .nav-actions .btn {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--text-sm);
  }

  .nav-toggle-input:checked ~ .site-nav {
    display: flex;
  }
}

@media (max-width: 640px) {
  .w {
    padding: 0 var(--sp-2);
  }

  section {
    padding: var(--sp-6) 0;
  }

  .hero-section {
    padding: var(--sp-6) 0 var(--sp-5);
  }

  .hero-bg-decor {
    width: 72vw;
    opacity: 0.06;
  }

  .card, .c {
    padding: var(--sp-3);
  }

  .ruled-item {
    grid-template-columns: 1fr;
    gap: var(--sp-1);
  }

  .spec-list li, .f li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .spec-list b, .spec-list strong, .f b {
    text-align: left;
  }

  .workflow-strip,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .btn-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-row .btn {
    width: 100%;
    text-align: center;
  }
}