/* ============================================================
   eTail Support – Design System
   Author: Cowork / Claude
   Standard: CSS Living Standard | Mobile-First | WCAG 2.2 AA
   ============================================================ */

/* ── 1. Custom Properties ─────────────────────────────────── */
:root {
  /* Brand — derived from Knot logo palette */
  --blue:          #1b6ec2;
  --blue-dark:     #135299;
  --blue-light:    #dbeafe;
  --navy:          #0f172a;
  --navy-mid:      #1e293b;
  --navy-soft:     #334155;

  /* Luca product */
  --luca:          #8b3a8f;
  --luca-dark:     #6d2270;
  --luca-light:    #f5e6f7;
  --luca-mid:      #c47fcb;

  /* Functional */
  --green:         #16a34a;
  --green-light:   #dcfce7;
  --amber:         #d97706;
  --red:           #dc2626;

  /* Surfaces */
  --surface-0:     #ffffff;
  --surface-1:     #f8fafc;
  --surface-2:     #f1f5f9;
  --surface-3:     #e2e8f0;

  /* Text */
  --text-1:        #0f172a;
  --text-2:        #334155;
  --text-3:        #64748b;
  --text-4:        #94a3b8;
  --text-inverse:  #ffffff;

  /* Borders */
  --border:        #e2e8f0;
  --border-mid:    #cbd5e1;

  /* Radius */
  --r-xs:  0.25rem;
  --r-sm:  0.5rem;
  --r-md:  0.875rem;
  --r-lg:  1.25rem;
  --r-xl:  2rem;
  --r-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgb(0 0 0 / 0.04);
  --shadow-sm: 0 2px 8px rgb(0 0 0 / 0.06);
  --shadow-md: 0 4px 20px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 12px 40px rgb(0 0 0 / 0.12);
  --shadow-xl: 0 24px 64px rgb(0 0 0 / 0.16);

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, monospace;

  /* Fluid type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.8rem);
  --text-sm:   clamp(0.875rem, 0.85rem + 0.13vw, 0.9375rem);
  --text-base: clamp(1rem,     0.96rem + 0.2vw,  1.0625rem);
  --text-lg:   clamp(1.125rem, 1.05rem + 0.38vw, 1.25rem);
  --text-xl:   clamp(1.25rem,  1.1rem  + 0.75vw, 1.5rem);
  --text-2xl:  clamp(1.5rem,   1.25rem + 1.25vw, 2rem);
  --text-3xl:  clamp(1.875rem, 1.5rem  + 1.88vw, 2.625rem);
  --text-4xl:  clamp(2.25rem,  1.75rem + 2.5vw,  3.25rem);
  --text-5xl:  clamp(2.75rem,  2rem    + 3.75vw, 4.25rem);

  /* Motion */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.7, 0, 0.84, 0);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl:1400px;
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --surface-0:   #0f172a;
    --surface-1:   #1e293b;
    --surface-2:   #263348;
    --surface-3:   #334155;
    --text-1:      #f1f5f9;
    --text-2:      #cbd5e1;
    --text-3:      #94a3b8;
    --text-4:      #64748b;
    --border:      #1e293b;
    --border-mid:  #334155;
    --blue-light:  #0a1f3d;
    --luca-light:  #2a0f2e;
    --green-light: #052e16;
    --shadow-xs: 0 1px 2px rgb(0 0 0 / 0.3);
    --shadow-sm: 0 2px 8px rgb(0 0 0 / 0.4);
    --shadow-md: 0 4px 20px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 12px 40px rgb(0 0 0 / 0.6);
  }
}

/* ── 2. Reset & Base ─────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-1);
  background-color: var(--surface-0);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--blue-dark); }

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p { max-width: 68ch; }
p + p { margin-block-start: var(--space-4); }

ul, ol { padding-inline-start: var(--space-6); }
li + li { margin-block-start: var(--space-2); }

strong { font-weight: 600; }

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* ── 3. Layout Utilities ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
@media (min-width: 640px)  { .container { padding-inline: var(--space-8); } }
@media (min-width: 1024px) { .container { padding-inline: var(--space-12); } }

.container--sm  { max-width: var(--container-sm); }
.container--md  { max-width: var(--container-md); }
.container--lg  { max-width: var(--container-lg); }
.container--2xl { max-width: var(--container-2xl); }

.grid {
  display: grid;
  gap: var(--space-8);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr)); }

.flex       { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col   { flex-direction: column; }
.flex-wrap  { flex-wrap: wrap; }
.gap-4      { gap: var(--space-4); }
.gap-6      { gap: var(--space-6); }
.gap-8      { gap: var(--space-8); }

/* Sections */
.section {
  padding-block: var(--space-16);
}
@media (min-width: 768px) {
  .section { padding-block: var(--space-20); }
}
@media (min-width: 1024px) {
  .section { padding-block: var(--space-24); }
}

.section--sm { padding-block: var(--space-12); }
.section--lg { padding-block: clamp(var(--space-20), 6vw, 8rem); }

.section--dark     { background-color: var(--navy); color: var(--text-inverse); }
.section--navy-mid { background-color: var(--navy-mid); color: var(--text-inverse); }
.section--tinted   { background-color: var(--surface-1); }
.section--blue     { background-color: var(--blue-light); }
.section--luca     { background-color: var(--luca-light); }

.section--dark  h1, .section--dark  h2, .section--dark  h3,
.section--dark  h4, .section--dark  h5, .section--dark  h6,
.section--navy-mid h1, .section--navy-mid h2, .section--navy-mid h3 {
  color: var(--text-inverse);
}

/* Section header */
.section-header {
  margin-block-end: var(--space-12);
  max-width: 52ch;
}
.section-header--center {
  text-align: center;
  margin-inline: auto;
}

.section-eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-block-end: var(--space-3);
}
.section-eyebrow--luca { color: var(--luca); }
.section-eyebrow--green { color: var(--green); }

.section-title {
  margin-block-end: var(--space-4);
}
.section-lead {
  font-size: var(--text-lg);
  color: var(--text-2);
  max-width: 60ch;
}
.section--dark .section-lead,
.section--navy-mid .section-lead {
  color: rgba(255,255,255,0.75);
}

/* ── 4. Navigation ───────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--surface-0);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--duration-base) var(--ease-out);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: var(--space-6);
}
@media (min-width: 1024px) {
  .nav-wrapper { height: 4.5rem; }
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo img {
  height: 2.25rem;
  width: auto;
}
@media (min-width: 768px) {
  .nav-logo img { height: 2.5rem; }
}

.nav-menu {
  display: none;
  list-style: none;
  padding: 0;
  margin: 0;
  align-items: center;
  gap: var(--space-1);
}
@media (min-width: 1024px) {
  .nav-menu { display: flex; }
}

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: color var(--duration-fast), background-color var(--duration-fast);
  white-space: nowrap;
  min-height: 44px;
}
.nav-link:hover {
  color: var(--text-1);
  background-color: var(--surface-2);
}
.nav-link.active { color: var(--blue); font-weight: 600; }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  inset-inline-start: 0;
  min-width: 14rem;
  background: var(--surface-0);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--duration-base), transform var(--duration-base), visibility var(--duration-base);
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-2);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: background-color var(--duration-fast), color var(--duration-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.nav-dropdown a:hover {
  background-color: var(--surface-2);
  color: var(--text-1);
}

/* Chevron icon */
.nav-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-fast);
}
.nav-item:hover .nav-link svg { transform: rotate(180deg); }

/* CTA buttons in nav */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile menu toggle */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-2);
  border-radius: var(--r-sm);
  transition: background-color var(--duration-fast);
}
.nav-toggle:hover { background-color: var(--surface-2); }
@media (min-width: 1024px) { .nav-toggle { display: none; } }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 4rem;
  background: var(--surface-0);
  z-index: 99;
  overflow-y: auto;
  padding: var(--space-6);
  border-top: 1px solid var(--border);
}
.mobile-nav.open { display: block; }

.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mobile-nav-list a {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-1);
  text-decoration: none;
  border-radius: var(--r-sm);
  min-height: 48px;
  transition: background-color var(--duration-fast);
}
.mobile-nav-list a:hover { background-color: var(--surface-2); }
.mobile-nav-sub {
  list-style: none;
  padding-inline-start: var(--space-6);
  margin-block-start: var(--space-2);
}
.mobile-nav-sub a {
  font-size: var(--text-base);
  color: var(--text-2);
}
.mobile-nav-divider {
  height: 1px;
  background: var(--border);
  margin-block: var(--space-4);
}

/* ── 5. Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.6875rem 1.5rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  min-height: 44px;
  transition: background-color var(--duration-fast), color var(--duration-fast),
              border-color var(--duration-fast), box-shadow var(--duration-fast),
              transform var(--duration-fast);
  -webkit-user-select: none;
  user-select: none;
}
.btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background-color: var(--blue);
  color: var(--text-inverse);
  border-color: var(--blue);
}
.btn--primary:hover {
  background-color: var(--blue-dark);
  border-color: var(--blue-dark);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgb(59 157 237 / 0.35);
}

.btn--secondary {
  background-color: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn--secondary:hover {
  background-color: var(--blue-light);
  color: var(--blue-dark);
}

.btn--ghost {
  background-color: transparent;
  color: var(--text-2);
  border-color: var(--border-mid);
}
.btn--ghost:hover {
  background-color: var(--surface-2);
  color: var(--text-1);
}

.btn--white {
  background-color: var(--surface-0);
  color: var(--navy);
  border-color: var(--surface-0);
}
.btn--white:hover {
  background-color: var(--surface-2);
  color: var(--navy);
  box-shadow: var(--shadow-md);
}

.btn--white-outline {
  background-color: transparent;
  color: var(--text-inverse);
  border-color: rgba(255,255,255,0.5);
}
.btn--white-outline:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.8);
  color: var(--text-inverse);
}

.btn--luca {
  background-color: var(--luca);
  color: var(--text-inverse);
  border-color: var(--luca);
}
.btn--luca:hover {
  background-color: var(--luca-dark);
  border-color: var(--luca-dark);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgb(124 58 237 / 0.35);
}

.btn--green {
  background-color: var(--green);
  color: var(--text-inverse);
  border-color: var(--green);
}
.btn--green:hover {
  background-color: #15803d;
  border-color: #15803d;
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgb(22 163 74 / 0.35);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
  min-height: 36px;
}
.btn--lg {
  padding: 0.875rem 2rem;
  font-size: var(--text-base);
  min-height: 52px;
}
.btn--xl {
  padding: 1rem 2.5rem;
  font-size: var(--text-lg);
  min-height: 56px;
  border-radius: var(--r-md);
}

/* ── 6. Cards ────────────────────────────────────────────── */
.card {
  background: var(--surface-0);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-8);
  transition: box-shadow var(--duration-base), transform var(--duration-base);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.card--flat { box-shadow: none; }
.card--flat:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card--tinted { background: var(--surface-1); border-color: transparent; }
.card--blue-tint { background: var(--blue-light); border-color: transparent; }
.card--luca-tint { background: var(--luca-light); border-color: transparent; }

/* Icon card */
.icon-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.icon-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--r-md);
  background-color: var(--blue-light);
  color: var(--blue);
  flex-shrink: 0;
}
.icon-card__icon--luca {
  background-color: var(--luca-light);
  color: var(--luca);
}
.icon-card__icon--green {
  background-color: var(--green-light);
  color: var(--green);
}
.icon-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-block-end: var(--space-2);
}
.icon-card__body {
  font-size: var(--text-sm);
  color: var(--text-3);
}

/* ── 7. Hero ─────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, #162444 60%, #1a2c52 100%);
  color: var(--text-inverse);
  padding-block: clamp(var(--space-20), 8vw, 9rem);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 80% at 70% 50%,
    rgb(59 157 237 / 0.12) 0%,
    transparent 65%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-10);
  align-items: center;
}
@media (min-width: 768px) {
  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}
@media (min-width: 1024px) {
  .hero__inner { grid-template-columns: 55% 45%; }
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgb(255 255 255 / 0.1);
  border: 1px solid rgb(255 255 255 / 0.15);
  backdrop-filter: blur(8px);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--r-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-block-end: var(--space-5);
}
.hero__eyebrow--luca { color: var(--luca-mid); }

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-inverse);
  margin-block-end: var(--space-5);
}
.hero__title span { color: var(--blue); }
.hero__title span.luca-accent { color: var(--luca-mid); }

.hero__lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.8);
  max-width: 52ch;
  line-height: 1.65;
  margin-block-end: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.hero__visual {
  display: none;
}
@media (min-width: 768px) {
  .hero__visual {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Hero stats bar */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-block-start: var(--space-8);
  border-block-start: 1px solid rgb(255 255 255 / 0.1);
  margin-block-start: var(--space-8);
}
.hero-stat__number {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.03em;
}
.hero-stat__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
}

/* ── 8. Feature Grid ─────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: var(--space-6);
}

/* ── 9. Pricing ──────────────────────────────────────────── */
.pricing-card {
  background: var(--surface-0);
  border: 2px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: box-shadow var(--duration-base), border-color var(--duration-base);
}
.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}
.pricing-card--featured {
  border-color: var(--blue);
  position: relative;
}
.pricing-badge {
  position: absolute;
  top: -1px;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: var(--text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-4);
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.pricing-price {
  font-size: var(--text-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-1);
  line-height: 1;
}
.pricing-price span {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-3);
}
.pricing-features {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-2);
  margin: 0;
}
.pricing-features li::before {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2316a34a' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20,6 9,17 4,12'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  flex-shrink: 0;
  margin-block-start: 2px;
}

/* ── 10. Testimonials ────────────────────────────────────── */
.testimonial {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-8);
  position: relative;
}
.testimonial::before {
  content: '\201C';
  position: absolute;
  top: var(--space-4);
  inset-inline-start: var(--space-6);
  font-size: 5rem;
  line-height: 1;
  color: var(--blue-light);
  font-family: Georgia, serif;
  pointer-events: none;
  user-select: none;
}
@media (prefers-color-scheme: dark) {
  .testimonial::before { color: rgba(59 157 237 / 0.15); }
}
.testimonial__quote {
  font-size: var(--text-base);
  color: var(--text-2);
  line-height: 1.7;
  padding-block-start: var(--space-6);
  margin-block-end: var(--space-6);
}
.testimonial__author {
  font-weight: 700;
  color: var(--text-1);
  font-size: var(--text-sm);
}
.testimonial__company {
  font-size: var(--text-xs);
  color: var(--text-3);
  margin-block-start: var(--space-1);
}

/* ── 11. CTA Sections ────────────────────────────────────── */
.cta-band {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--text-inverse);
  padding-block: clamp(var(--space-16), 6vw, var(--space-24));
  text-align: center;
}
.cta-band h2 { color: var(--text-inverse); }
.cta-band p  { color: rgba(255,255,255,0.75); margin-inline: auto; }

.cta-band--luca {
  background: linear-gradient(135deg, #3b1d6e 0%, #5b21b6 50%, #6d28d9 100%);
}

/* ── 12. Page Hero (inner pages) ─────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--text-inverse);
  padding-block: clamp(var(--space-16), 6vw, var(--space-20));
}
.page-hero h1 { color: var(--text-inverse); font-size: var(--text-4xl); }
.page-hero p  {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-lg);
  max-width: 56ch;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  margin-block-end: var(--space-5);
  list-style: none;
  padding: 0;
}
.breadcrumb a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}
.breadcrumb a:hover { color: rgba(255,255,255,1); }
.breadcrumb li + li::before {
  content: '/';
  margin-inline-end: var(--space-2);
}

/* ── 13. Content pages ───────────────────────────────────── */
.content-page {
  padding-block: var(--space-16);
}
.content-page h2 { margin-block: var(--space-10) var(--space-4); }
.content-page h3 { margin-block: var(--space-8) var(--space-3); }
.content-page p  { margin-block-end: var(--space-4); }
.content-page ul, .content-page ol { margin-block-end: var(--space-4); }

.prose {
  max-width: 72ch;
}
.prose h2 { font-size: var(--text-2xl); margin-block: var(--space-10) var(--space-4); }
.prose h3 { font-size: var(--text-xl);  margin-block: var(--space-8)  var(--space-3); }
.prose p  { margin-block-end: var(--space-5); color: var(--text-2); }
.prose ul, .prose ol { margin-block-end: var(--space-5); color: var(--text-2); }
.prose li + li { margin-block-start: var(--space-2); }

/* ── 14. Product Split Layout ────────────────────────────── */
.product-split {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}
@media (min-width: 768px) {
  .product-split { grid-template-columns: 1fr 1fr; }
  .product-split--reverse .product-split__visual { order: -1; }
}
@media (min-width: 1024px) {
  .product-split { gap: var(--space-16); }
}

/* ── 15. Logo / Brand Bar ────────────────────────────────── */
.brand-bar {
  padding-block: var(--space-12);
  border-block: 1px solid var(--border);
}
.brand-bar__inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-8) var(--space-12);
  justify-content: center;
}
.brand-bar__label {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-4);
  white-space: nowrap;
}
.brand-bar__logo {
  height: 1.75rem;
  width: auto;
  opacity: 0.55;
  filter: grayscale(1);
  transition: opacity var(--duration-base), filter var(--duration-base);
}
.brand-bar__logo:hover { opacity: 0.9; filter: none; }

/* ── 16. Alert / Notice ──────────────────────────────────── */
.alert {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  border: 1px solid;
}
.alert--info    { background: var(--blue-light);  border-color: var(--blue);  color: var(--navy); }
.alert--success { background: var(--green-light); border-color: var(--green); color: #14532d; }
.alert--warning { background: #fef3c7;             border-color: var(--amber); color: #78350f; }

/* ── 17. Tags / Badges ───────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--r-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.4;
}
.badge--blue   { background: var(--blue-light);  color: var(--blue-dark); }
.badge--luca   { background: var(--luca-light);  color: var(--luca-dark); }
.badge--green  { background: var(--green-light); color: #15803d; }
.badge--new    { background: var(--luca);        color: #fff; }

/* ── 18. Footer ──────────────────────────────────────────── */
.site-footer {
  background-color: var(--navy);
  color: rgba(255,255,255,0.65);
  padding-block: var(--space-16);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1fr; }
}

.footer-brand img {
  height: 2rem;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.85;
  margin-block-end: var(--space-4);
}
.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.65;
  max-width: 28ch;
}
.footer-contact {
  margin-block-start: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-contact a {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--duration-fast);
}
.footer-contact a:hover { color: #fff; }

.footer-col h4 {
  color: rgba(255,255,255,0.95);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-block-end: var(--space-4);
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col a {
  color: rgba(255,255,255,0.6);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color var(--duration-fast);
}
.footer-col a:hover { color: rgba(255,255,255,0.95); }

.footer-bottom {
  margin-block-start: var(--space-12);
  padding-block-start: var(--space-8);
  border-block-start: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}
.footer-bottom a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}
.footer-bottom a:hover { color: rgba(255,255,255,0.85); }

/* ── 19. Forms ───────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-1);
}
.form-label abbr {
  color: var(--red);
  text-decoration: none;
  margin-inline-start: var(--space-1);
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.6875rem 0.875rem;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-1);
  background-color: var(--surface-0);
  border: 1.5px solid var(--border-mid);
  border-radius: var(--r-sm);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
}
.form-textarea { min-height: 140px; resize: vertical; }
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgb(59 157 237 / 0.15);
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-4); }
.form-hint {
  font-size: var(--text-xs);
  color: var(--text-3);
}

.form-grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .form-grid--2 { grid-template-columns: 1fr 1fr; }
}

/* ── 20. Product showcase ────────────────────────────────── */
.product-card {
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--surface-0);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--duration-slow), transform var(--duration-slow);
}
.product-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}
.product-card__header {
  padding: var(--space-10);
}
.product-card__header--blue { background: linear-gradient(135deg, var(--navy) 0%, #163b6e 100%); }
.product-card__header--luca { background: linear-gradient(135deg, #3b1d6e 0%, #5b21b6 100%); }
.product-card__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.9);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--r-full);
  margin-block-end: var(--space-4);
}
.product-card__name {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: #fff;
  margin-block-end: var(--space-3);
}
.product-card__desc {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-base);
  line-height: 1.65;
  max-width: 44ch;
}
.product-card__body {
  padding: var(--space-8) var(--space-10);
}
.product-card__features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.product-card__features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-2);
  margin: 0;
}
.product-card__features li::before {
  content: '';
  display: block;
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2316a34a' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20,6 9,17 4,12'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  flex-shrink: 0;
}

/* ── 21. Visual decorations ──────────────────────────────── */
.bg-grid {
  background-image: linear-gradient(rgb(226 232 240 / 0.5) 1px, transparent 1px),
                    linear-gradient(to right, rgb(226 232 240 / 0.5) 1px, transparent 1px);
  background-size: 40px 40px;
}
@media (prefers-color-scheme: dark) {
  .bg-grid {
    background-image: linear-gradient(rgb(51 65 85 / 0.4) 1px, transparent 1px),
                      linear-gradient(to right, rgb(51 65 85 / 0.4) 1px, transparent 1px);
  }
}

.glow-blue {
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgb(59 157 237 / 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.glow-luca {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgb(124 58 237 / 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* ── 22. Utilities ───────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}
.text-center  { text-align: center; }
.text-balance { text-wrap: balance; }
.mt-0   { margin-block-start: 0; }
.mt-4   { margin-block-start: var(--space-4); }
.mt-6   { margin-block-start: var(--space-6); }
.mt-8   { margin-block-start: var(--space-8); }
.mt-12  { margin-block-start: var(--space-12); }
.mt-16  { margin-block-start: var(--space-16); }
.mb-4   { margin-block-end: var(--space-4); }
.mb-6   { margin-block-end: var(--space-6); }
.mb-8   { margin-block-end: var(--space-8); }
.mb-12  { margin-block-end: var(--space-12); }
.text-blue  { color: var(--blue); }
.text-luca  { color: var(--luca); }
.text-green { color: var(--green); }
.text-muted { color: var(--text-3); }
.font-bold  { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* ── 23. Animations ──────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
  }
  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 24. Skip link ───────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  inset-inline-start: var(--space-4);
  background: var(--blue);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: 0 0 var(--r-md) var(--r-md);
  font-weight: 700;
  text-decoration: none;
  z-index: 9999;
  transition: top var(--duration-fast);
}
.skip-link:focus { top: 0; }

/* ── 25. Luca-specific styles ────────────────────────────── */
.luca-hero {
  background: linear-gradient(135deg, #1a0a2e 0%, #2d1b5e 40%, #3b1d6e 100%);
}
.luca-hero::before {
  background: radial-gradient(ellipse 120% 80% at 70% 50%,
    rgb(124 58 237 / 0.2) 0%,
    transparent 65%);
}
.luca-hero .hero__title span { color: var(--luca-mid); }
.luca-hero .hero__eyebrow  { color: var(--luca-mid); }
.luca-hero .hero-stat__number { color: var(--luca-mid); }

.luca-feature-icon {
  background: var(--luca-light);
  color: var(--luca);
}

/* ── 26. Scroll indicator ────────────────────────────────── */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.4);
  font-size: var(--text-xs);
  margin-block-start: var(--space-12);
}
.scroll-indicator__line {
  width: 1px;
  height: 2rem;
  background: rgba(255,255,255,0.2);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50%       { opacity: 1;   transform: scaleY(1); }
}

/* ── 27. Step list ───────────────────────────────────────── */
.step-list {
  counter-reset: steps;
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.step-list li {
  counter-increment: steps;
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  margin: 0;
}
.step-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--r-full);
  background: var(--blue);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
  margin-block-start: 2px;
}

/* ── 28. Comparison table ────────────────────────────────── */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.comparison-table th,
.comparison-table td {
  padding: var(--space-4);
  border-block-end: 1px solid var(--border);
  text-align: start;
}
.comparison-table th { font-weight: 700; color: var(--text-1); background: var(--surface-2); }
.comparison-table tr:last-child td { border: none; }
.comparison-table .check { color: var(--green); font-size: 1.2em; }
.comparison-table .cross { color: var(--red);   font-size: 1.2em; }

/* ── 29. Contact layout ──────────────────────────────────── */
.contact-grid {
  display: grid;
  gap: var(--space-12);
}
@media (min-width: 768px) {
  .contact-grid { grid-template-columns: 1fr 2fr; }
}
.contact-info-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.contact-info-list a {
  text-decoration: none;
  color: var(--text-2);
  font-weight: 500;
}
.contact-info-list a:hover { color: var(--blue); }
.contact-info-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.contact-info-icon {
  width: 44px;
  height: 44px;
  background: var(--blue-light);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  flex-shrink: 0;
}