/**
 * Sovereign Light - Design System
 * HI AI Design visual overhaul, based on the Stitch "Sovereign Light" spec.
 * Self-contained: does not depend on theme.css / style.css (legacy dark/neon system).
 * Load order: Tailwind CDN -> this file -> page-specific overrides.
 */

:root {
  /* ---- Brand ---- */
  --sl-primary: #0d9488;
  --sl-primary-hover: #0f766e;
  --sl-primary-dark: #115e59;
  --sl-on-primary: #ffffff;
  --sl-secondary: #2dd4bf;

  /* ---- Surface & background ---- */
  --sl-surface: #f5faf8;
  --sl-surface-bright: #ffffff;
  --sl-surface-dim: #eef2f1;
  --sl-outline: #e2e8f0;
  --sl-outline-variant: rgba(13, 148, 136, 0.2);

  /* ---- Text ---- */
  --sl-text: #0f172a;
  --sl-text-muted: #475569;
  --sl-text-faint: #64748b;

  /* ---- Type ---- */
  --sl-font-display: 'Hanken Grotesk', system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --sl-font-body: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --sl-font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* ---- Layout ---- */
  --sl-container-max: 1280px;
  --sl-gutter: 24px;
  --sl-stack-sm: 24px;
  --sl-stack-md: 48px;
  --sl-stack-lg: 80px;

  /* ---- Shape ---- */
  --sl-radius-sm: 4px;
  --sl-radius-md: 8px;
  --sl-radius-lg: 12px;
  --sl-radius-full: 9999px;

  /* ---- Elevation ---- */
  --sl-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --sl-shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --sl-shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --sl-shadow-glow: 0 0 0 1px var(--sl-outline-variant), 0 8px 24px rgba(13, 148, 136, 0.14);

  --sl-transition: 160ms ease;
}

@media (min-width: 768px) {
  :root {
    --sl-gutter: 48px;
  }
}

/* ===== Base ===== */
.sl-page {
  background: var(--sl-surface);
  color: var(--sl-text);
  font-family: var(--sl-font-body);
  -webkit-font-smoothing: antialiased;
}

.sl-page h1,
.sl-page h2,
.sl-page h3,
.sl-page h4 {
  font-family: var(--sl-font-display);
  color: var(--sl-text);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.sl-page ::selection {
  background: var(--sl-secondary);
  color: var(--sl-primary-dark);
}

.sl-page :focus-visible {
  outline: 2px solid var(--sl-primary);
  outline-offset: 2px;
}

/* ===== Layout helpers ===== */
.sl-container {
  max-width: var(--sl-container-max);
  margin-inline: auto;
  padding-inline: 20px;
}

@media (min-width: 768px) {
  .sl-container { padding-inline: var(--sl-gutter); }
}

.sl-section {
  padding-block: var(--sl-stack-lg);
}

@media (max-width: 767px) {
  .sl-section { padding-block: var(--sl-stack-md); }
}

.sl-section-alt {
  background: var(--sl-surface-dim);
}

/* Small uppercase tracked eyebrow label, e.g. "AI GOVERNANCE & AUDITS" */
.sl-eyebrow {
  font-family: var(--sl-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sl-primary);
}

.sl-lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--sl-text-muted);
}

/* ===== Buttons ===== */
.sl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--sl-font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: var(--sl-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--sl-transition), border-color var(--sl-transition), box-shadow var(--sl-transition), color var(--sl-transition), transform var(--sl-transition);
  text-decoration: none;
  white-space: nowrap;
}

.sl-btn:active { transform: translateY(1px); }

.sl-btn-primary {
  background: var(--sl-primary);
  color: var(--sl-on-primary);
}
.sl-btn-primary:hover {
  background: var(--sl-primary-hover);
  box-shadow: var(--sl-shadow-glow);
}

.sl-btn-secondary {
  background: transparent;
  color: var(--sl-text);
  border-color: var(--sl-outline);
}
.sl-btn-secondary:hover {
  border-color: var(--sl-primary);
  color: var(--sl-primary-dark);
}

.sl-btn-ghost {
  background: transparent;
  color: var(--sl-primary-dark);
  padding-inline: 4px;
  font-weight: 600;
}
.sl-btn-ghost:hover { color: var(--sl-primary); }

/* ===== Badges / tags ===== */
.sl-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--sl-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sl-text-faint);
}

.sl-badge svg { width: 16px; height: 16px; flex-shrink: 0; }

.sl-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--sl-radius-full);
  background: var(--sl-outline-variant);
  color: var(--sl-primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ===== Cards ===== */
.sl-card {
  background: var(--sl-surface-bright);
  border: 1px solid var(--sl-outline);
  border-radius: var(--sl-radius-lg);
  padding: 32px;
  transition: border-color var(--sl-transition), box-shadow var(--sl-transition), transform var(--sl-transition);
}

.sl-card-hover:hover {
  border-color: var(--sl-primary);
  box-shadow: var(--sl-shadow-md);
  transform: translateY(-2px);
}

.sl-icon-box {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--sl-radius-md);
  background: var(--sl-outline-variant);
  color: var(--sl-primary);
  margin-bottom: 20px;
}

.sl-icon-box svg { width: 24px; height: 24px; }

/* ===== Grid ===== */
.sl-grid {
  display: grid;
  gap: 24px;
}

.sl-grid-2 { grid-template-columns: repeat(1, 1fr); }
.sl-grid-3 { grid-template-columns: repeat(1, 1fr); }
.sl-grid-4 { grid-template-columns: repeat(1, 1fr); }

@media (min-width: 640px) {
  .sl-grid-2 { grid-template-columns: repeat(2, 1fr); }
  .sl-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .sl-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .sl-grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ===== Navigation ===== */
.sl-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(245, 250, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sl-outline);
}

.sl-nav-inner {
  max-width: var(--sl-container-max);
  margin-inline: auto;
  padding: 8px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

@media (min-width: 768px) {
  .sl-nav-inner { padding-inline: var(--sl-gutter); }
}

.sl-nav-logo img {
  width: 88px;
  height: 88px;
  object-fit: contain;
}

@media (min-width: 768px) {
  .sl-nav-logo img { width: 100px; height: 100px; }
}

.sl-nav-links {
  display: none;
  align-items: center;
  gap: 32px;
}

@media (min-width: 1024px) {
  .sl-nav-links { display: flex; }
}

.sl-nav-links a {
  font-weight: 600;
  font-size: 15px;
  color: var(--sl-text);
  text-decoration: none;
  transition: color var(--sl-transition);
  padding-block: 4px;
  border-bottom: 2px solid transparent;
}

.sl-nav-links a:hover { color: var(--sl-primary); }

.sl-nav-links a[aria-current="page"] {
  color: var(--sl-primary);
  border-bottom-color: var(--sl-primary);
}

.sl-nav-actions {
  display: none;
  align-items: center;
  gap: 12px;
}

@media (min-width: 1024px) {
  .sl-nav-actions { display: flex; }
}

.sl-nav-cta-secondary {
  font-weight: 600;
  font-size: 14px;
  color: var(--sl-text-muted);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--sl-radius-sm);
  border: 1px solid var(--sl-outline);
  transition: border-color var(--sl-transition), color var(--sl-transition);
}
.sl-nav-cta-secondary:hover { border-color: var(--sl-primary); color: var(--sl-primary-dark); }

.sl-nav-mobile-btn {
  display: flex;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--sl-text);
  z-index: 10011;
  position: relative;
}
@media (min-width: 1024px) {
  .sl-nav-mobile-btn { display: none; }
}

.sl-nav-mobile-btn .sl-icon-close { display: none; }
.sl-nav-mobile-btn[aria-expanded="true"] .sl-icon-burger { display: none; }
.sl-nav-mobile-btn[aria-expanded="true"] .sl-icon-close { display: block; }

.sl-nav-mobile-panel {
  position: fixed;
  inset: 0;
  /* Above Sympathico's widget stack (z-index up to 10001, sympathico.css) so the
     open mobile menu isn't unclickable behind the chat bubble/panel when the
     widget has auto-opened on load. */
  z-index: 10010;
  background: var(--sl-surface-bright);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transform: translateX(100%);
  transition: transform 260ms ease;
}

.sl-nav-mobile-panel.is-open { transform: translateX(0); }

.sl-nav-mobile-panel a {
  font-family: var(--sl-font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--sl-text);
  text-decoration: none;
}
.sl-nav-mobile-panel a:hover { color: var(--sl-primary); }

/* Offsets page content below the fixed .sl-nav. Add to the first element after #site-nav.
   Measured actual nav height: ~104px (mobile, 88px logo) to ~125px (desktop, 100px logo +
   padding + border). The old 96px value was an unmeasured estimate and clipped page content
   under the nav on every page - most visibly on pages whose first element has no buffer
   above it (e.g. legal pages' <h1>). 140px covers both breakpoints with headroom. */
.sl-nav-offset { padding-top: 140px; }

/* In-page anchors (e.g. audits.html#scope) land right under the fixed .sl-nav
   without this - same root cause as .sl-nav-offset above. Applies sitewide to
   any section/element used as an anchor target. */
[id] { scroll-margin-top: 140px; }

/* ===== Footer ===== */
.sl-footer {
  background: var(--sl-surface-dim);
  border-top: 1px solid var(--sl-outline);
  padding-block: 64px 32px;
}

.sl-footer-grid {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .sl-footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.sl-footer-brand {
  font-family: var(--sl-font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--sl-primary-dark);
}

.sl-footer h5 {
  font-family: var(--sl-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sl-text-faint);
  margin-bottom: 12px;
}

.sl-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }

.sl-footer a {
  color: var(--sl-text-muted);
  text-decoration: none;
  font-size: 14px;
}
.sl-footer a:hover { color: var(--sl-primary-dark); text-decoration: underline; }

.sl-footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--sl-outline);
  font-size: 13px;
  color: var(--sl-text-faint);
}

/* ===== Forms (used by Book a Call, Flash Audit fold-in, etc.) ===== */
.sl-field { display: flex; flex-direction: column; gap: 6px; }

.sl-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--sl-text-muted);
}

.sl-input,
.sl-select,
.sl-textarea {
  font-family: var(--sl-font-body);
  font-size: 15px;
  color: var(--sl-text);
  background: var(--sl-surface-bright);
  border: 1px solid var(--sl-outline);
  border-radius: var(--sl-radius-sm);
  padding: 12px 14px;
  transition: border-color var(--sl-transition), box-shadow var(--sl-transition);
}

.sl-input:focus,
.sl-select:focus,
.sl-textarea:focus {
  outline: none;
  border-color: var(--sl-primary);
  box-shadow: 0 0 0 3px var(--sl-outline-variant);
}

.sl-textarea { resize: vertical; min-height: 120px; }