/* ==========================================================================
   LightSide Lab — design tokens
   ========================================================================== */
:root {
  /* Color */
  --color-bg: #FAF6EF;
  --color-bg-alt: #F2EBDD;
  --color-surface: #FFFFFF;
  --color-ink: #1B2340;
  --color-ink-soft: #4B5268;
  --color-ink-faint: #7A8093;
  --color-border: #E4DBC9;
  --color-border-soft: rgba(27, 35, 64, 0.10);

  --color-accent: #DD6B3F;
  --color-accent-ink: #B0501F;
  --color-accent-dark: #A5471F;
  --color-accent-soft: #F5DFCC;
  --color-accent-soft-2: rgba(221, 107, 63, 0.12);

  --color-dark-bg: #12182B;
  --color-dark-surface: #1B2340;
  --color-dark-border: rgba(244, 239, 230, 0.14);
  --color-dark-text: #F3EEE4;
  --color-dark-text-soft: #B7BECF;

  /* Type */
  --font-display: 'Fraunces', 'Iowan Old Style', 'Georgia', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Shape & shadow */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 1px 2px rgba(27, 35, 64, 0.05), 0 8px 24px -12px rgba(27, 35, 64, 0.18);
  --shadow-card-hover: 0 4px 10px rgba(27, 35, 64, 0.06), 0 16px 32px -14px rgba(27, 35, 64, 0.22);

  /* Rhythm */
  --section-pad: clamp(4rem, 3.2rem + 3.5vw, 6.5rem);
  --container-w: 1200px;

  color-scheme: light;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
ul, ol { padding: 0; margin: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 2.5px solid var(--color-accent-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--color-ink);
  color: var(--color-dark-text);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 200;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

/* ==========================================================================
   Layout helpers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 1.5rem;
}
@media (min-width: 640px) { .container { padding-inline: 2rem; } }

.section { padding-block: var(--section-pad); }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: var(--color-dark-bg);
  color: var(--color-dark-text);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
}
.section-dark .eyebrow { color: var(--color-accent); }
.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.section-head {
  max-width: 46rem;
  margin-bottom: clamp(2rem, 1.6rem + 2vw, 3.25rem);
}
.section-head.center { margin-inline: auto; text-align: center; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; color: var(--color-ink); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--color-dark-text); }

h2 { font-size: clamp(1.75rem, 1.5rem + 1.2vw, 2.5rem); line-height: 1.15; margin-top: 0.6rem; }
h3 { font-size: 1.25rem; line-height: 1.3; }

.lede {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  margin-top: 0.9rem;
  line-height: 1.6;
}
.section-dark .lede { color: var(--color-dark-text-soft); }

.conclusion-line {
  margin-top: clamp(2rem, 1.7rem + 1.5vw, 3rem);
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-ink);
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-accent);
  color: var(--color-ink);
  box-shadow: 0 10px 24px -10px rgba(221, 107, 63, 0.55);
}
.btn-primary:hover { background: #E67B51; }
.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border-soft);
}
.btn-secondary:hover { border-color: var(--color-ink); background: rgba(27,35,64,0.03); }
.section-dark .btn-secondary { color: var(--color-dark-text); border-color: var(--color-dark-border); }
.section-dark .btn-secondary:hover { border-color: var(--color-dark-text); background: rgba(244,239,230,0.06); }

.btn-block { width: 100%; }
.btn-sm { padding: 0.6rem 1.15rem; font-size: 0.9rem; }

.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; }
.reassurance {
  margin-top: 1.1rem;
  font-size: 0.94rem;
  color: var(--color-ink-faint);
  max-width: 34rem;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 246, 239, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.85rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-ink);
}
.brand img { width: 34px; height: 34px; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  line-height: 1.1;
}
.brand-word span { display: block; font-family: var(--font-body); font-weight: 500; font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-ink-faint); }

.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.97rem;
  color: var(--color-ink-soft);
  transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--color-ink); }

.nav-cta { display: none; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.mobile-menu {
  position: fixed;
  inset: 0;
  top: 66px;
  background: var(--color-bg);
  padding: 1.5rem;
  z-index: 90;
  overflow-y: auto;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-menu a {
  display: block;
  padding: 0.9rem 0.25rem;
  font-size: 1.1rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu .btn { margin-top: 1.5rem; }

@media (min-width: 960px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-top: clamp(3rem, 2.4rem + 2.5vw, 5rem); padding-bottom: var(--section-pad); }
.hero-grid {
  display: grid;
  gap: clamp(2.5rem, 1.5rem + 4vw, 4rem);
  align-items: center;
}
@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
}

.hero h1 {
  font-size: clamp(2.25rem, 1.7rem + 2.4vw, 3.4rem);
  line-height: 1.08;
}
.hero .lede { font-size: 1.2rem; max-width: 34rem; }
.hero .cta-row { margin-top: 2rem; }

/* Workflow diagram */
.workflow-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 1.2rem + 1vw, 2.25rem);
  box-shadow: var(--shadow-card);
}
.workflow-card h2 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin: 0 0 1.25rem;
}
.workflow-steps { display: flex; flex-direction: column; }
.workflow-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 1rem;
  align-items: start;
  position: relative;
  padding-bottom: 1.5rem;
}
.workflow-step:last-child { padding-bottom: 0; }
.step-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-soft-2);
  color: var(--color-accent-ink);
  flex-shrink: 0;
}
.workflow-step.is-human .step-icon { background: var(--color-ink); color: var(--color-dark-text); }
.step-icon svg { width: 22px; height: 22px; }
.workflow-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 44px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.step-label { font-weight: 600; color: var(--color-ink); font-size: 1rem; }
.step-desc { color: var(--color-ink-soft); font-size: 0.92rem; margin-top: 0.15rem; }

/* ==========================================================================
   Recognition / problem list
   ========================================================================== */
.recognition-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .recognition-grid { grid-template-columns: 1fr 1fr; } }
.recognition-item {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
}
.recognition-item svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
  margin-top: 0.2rem;
  color: var(--color-accent-ink);
}
.recognition-item p { font-size: 1rem; color: var(--color-ink); }

/* ==========================================================================
   Card grid — workflow examples
   ========================================================================== */
.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .card-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }

.example-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.example-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.example-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--color-accent-soft-2);
  color: var(--color-accent-ink);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.1rem;
}
.example-icon svg { width: 24px; height: 24px; }
.example-card h3 { margin-bottom: 0.5rem; }
.example-card p { color: var(--color-ink-soft); font-size: 0.98rem; }

/* ==========================================================================
   Differentiator — layered stack
   ========================================================================== */
.diff-layout {
  display: grid;
  gap: clamp(2rem, 1.6rem + 2vw, 3.5rem);
  align-items: start;
}
@media (min-width: 960px) { .diff-layout { grid-template-columns: 0.9fr 1.1fr; } }

.stack {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.stack-layer {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 500;
}
.stack-layer .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}
.stack-layer.is-anchor {
  background: var(--color-ink);
  color: var(--color-dark-text);
  border-color: var(--color-ink);
}
.stack-layer.is-anchor .dot { background: var(--color-dark-text); }

.highlight-quote {
  margin-top: clamp(1.5rem, 1.3rem + 1vw, 2.25rem);
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-ink);
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--color-accent-soft);
}

/* ==========================================================================
   Security (dark) section
   ========================================================================== */
.security-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .security-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .security-grid { grid-template-columns: repeat(4, 1fr); } }

.security-item {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
}
.security-item svg {
  width: 26px; height: 26px;
  color: var(--color-accent);
  margin-bottom: 0.9rem;
}
.security-item h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.security-item p { color: var(--color-dark-text-soft); font-size: 0.9rem; }

.security-note {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--color-dark-text-soft);
  border-top: 1px solid var(--color-dark-border);
  padding-top: 1.5rem;
  max-width: 46rem;
}

/* ==========================================================================
   Engagement steps
   ========================================================================== */
.steps-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 768px) { .steps-grid { grid-template-columns: repeat(3, 1fr); } }
.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
  position: relative;
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem; height: 2.5rem;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-dark-text);
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 1rem;
}
.step-card h3 { margin-bottom: 0.5rem; }
.step-card p { color: var(--color-ink-soft); }
.engagement-note {
  margin-top: 2rem;
  font-size: 0.98rem;
  color: var(--color-ink-soft);
  text-align: center;
}

/* ==========================================================================
   Service tiers
   ========================================================================== */
.tiers-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .tiers-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1100px) { .tiers-grid { grid-template-columns: repeat(4, 1fr); } }

.tier-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
  box-shadow: var(--shadow-card);
}
.tier-card.is-featured { border-color: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-card); }
.tier-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
  margin-bottom: 0.6rem;
}
.tier-card h3 { font-size: 1.15rem; margin-bottom: 0.6rem; }
.tier-card p { color: var(--color-ink-soft); font-size: 0.95rem; flex-grow: 1; }
.tier-card .btn { margin-top: 1.4rem; }

/* ==========================================================================
   Credibility / about
   ========================================================================== */
.about-layout {
  display: grid;
  gap: clamp(2rem, 1.6rem + 2vw, 3rem);
}
@media (min-width: 960px) { .about-layout { grid-template-columns: 1.1fr 0.9fr; align-items: start; } }

.tag-list { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.75rem; }
.tag {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-ink-soft);
}

.placeholder-card {
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-ink-faint);
}
.placeholder-card strong { color: var(--color-ink-soft); display: block; margin-bottom: 0.3rem; }

/* ==========================================================================
   Testimonials
   ========================================================================== */
.testimonial-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 800px) { .testimonial-grid { grid-template-columns: 1fr 1fr; } }

.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}
.testimonial-card .quote-mark {
  width: 30px; height: 30px;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}
.testimonial-card blockquote {
  margin: 0;
  font-size: 1.02rem;
  color: var(--color-ink);
  line-height: 1.6;
  flex-grow: 1;
}
.testimonial-card figcaption {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}
.testimonial-card figcaption img {
  width: 48px; height: 48px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  flex-shrink: 0;
}
.testimonial-card figcaption .name { font-weight: 600; font-size: 0.95rem; color: var(--color-ink); display: block; }
.testimonial-card figcaption .role { font-size: 0.85rem; color: var(--color-ink-faint); }

/* ==========================================================================
   Final CTA
   ========================================================================== */
.final-cta {
  background: var(--color-ink);
  color: var(--color-dark-text);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  text-align: center;
}
.final-cta h2 { color: var(--color-dark-text); }
.final-cta .lede { color: var(--color-dark-text-soft); max-width: 40rem; margin-inline: auto; }
.final-cta .cta-row { justify-content: center; margin-top: 2rem; }
.final-cta .email-link { margin-top: 1.25rem; font-size: 0.95rem; }
.final-cta .email-link a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: 3rem;
}
.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-brand { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.75rem; }
.footer-brand img { width: 28px; height: 28px; }
.footer-brand span { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.footer-tagline { color: var(--color-ink-soft); font-size: 0.95rem; max-width: 26rem; }
.footer-heading { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; color: var(--color-ink-faint); margin-bottom: 0.9rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a { text-decoration: none; color: var(--color-ink-soft); font-size: 0.95rem; }
.footer-col a:hover { color: var(--color-ink); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-ink-faint);
}
.footer-bottom a { color: var(--color-ink-faint); }
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}
.social-link svg { width: 16px; height: 16px; }