/* =============================================
   LAYOUT.CSS — FindPPI.co.uk
   Header, Footer, Sections, Grid Systems
   ============================================= */

/* ---- SITE HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-divider);
  transition:
    box-shadow var(--transition-slow),
    background var(--transition-slow);
}
[data-theme="dark"] .site-header {
  background: rgba(11, 18, 34, 0.92);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 68px;
  padding-inline: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo:hover { text-decoration: none; }
.logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.logo-tld {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}
.logo-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 400;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Main Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
  flex: 1;
}
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
.nav-link:hover { color: var(--color-primary); background: var(--color-primary-light); text-decoration: none; }
.nav-link.active { color: var(--color-primary); font-weight: 600; }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity var(--transition-interactive),
    visibility var(--transition-interactive),
    transform var(--transition-interactive);
  z-index: 200;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-dropdown a:hover { background: var(--color-primary-light); color: var(--color-primary); }

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.theme-toggle:hover { color: var(--color-primary); background: var(--color-primary-light); border-color: var(--color-primary-highlight); }

/* Mobile menu toggle */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: none;
  border: 1px solid var(--color-border);
}

/* Top bar */
.top-bar {
  background: var(--color-primary);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-xs);
  padding: var(--space-2) 0;
  text-align: center;
  letter-spacing: 0.02em;
}
.top-bar a { color: var(--color-accent); font-weight: 600; }
.top-bar a:hover { color: var(--color-accent-hover); text-decoration: underline; }


/* ---- HERO SECTION ---- */
.hero {
  position: relative;
  background: var(--color-primary);
  overflow: hidden;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 80% at 70% 50%, rgba(77, 124, 196, 0.25) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 10% 80%, rgba(212, 160, 23, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0; right: 0;
  height: 80px;
  background: var(--color-bg);
  clip-path: ellipse(55% 100% at 50% 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
}

.hero-content { color: var(--color-text-inverse); }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px 14px;
  background: rgba(212, 160, 23, 0.2);
  border: 1px solid rgba(212, 160, 23, 0.4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}
.hero h1 {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  color: #FFFFFF;
  line-height: 1.15;
  margin-bottom: var(--space-5);
}
.hero h1 em {
  font-style: italic;
  color: var(--color-accent);
}
.hero-subtitle {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 48ch;
}
.hero-ctas {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  font-weight: 500;
}
.hero-trust-item svg { color: var(--color-accent); }

/* Hero visual card */
.hero-visual {
  position: relative;
}
.hero-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-xl);
  position: relative;
  z-index: 2;
}
.hero-card-badge {
  position: absolute;
  top: -12px;
  right: var(--space-6);
  background: var(--color-accent);
  color: #0F1B35;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.hero-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.hero-stat {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
}
.hero-stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  display: block;
}
.hero-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: 2px;
}


/* ---- SECTIONS ---- */
.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}
.section-alt { background: var(--color-surface-2); }
.section-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.section-dark {
  background: #0F1B35;
  color: var(--color-text-inverse);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}
.section-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.section-primary .section-eyebrow { color: var(--color-accent); }
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-primary .section-title,
.section-dark .section-title { color: #FFFFFF; }
.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.section-primary .section-subtitle,
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }


/* ---- GRID LAYOUTS ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}


/* ---- FOOTER ---- */
.site-footer {
  background: #0B1628;
  color: rgba(255,255,255,0.7);
  padding-top: var(--space-16);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--space-10);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
  padding-bottom: var(--space-12);
}
.footer-brand .logo-name { color: #FFFFFF; }
.footer-brand .logo-tld  { color: var(--color-accent); }
.footer-desc {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  line-height: 1.65;
  max-width: 36ch;
}
.footer-badges {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}
.footer-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255,255,255,0.65);
}
.footer-col-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-links a:hover { color: #FFFFFF; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  max-width: var(--content-wide);
  margin-inline: auto;
}
.footer-legal {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
  max-width: 70ch;
  line-height: 1.5;
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-4);
}
.footer-bottom-links a {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}
.footer-bottom-links a:hover { color: rgba(255,255,255,0.8); }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: span 2; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > :first-child { grid-column: 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}


/* ---- MOBILE NAV ---- */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .header-inner { gap: auto; }
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--color-surface);
  z-index: 99;
  overflow-y: auto;
  padding: var(--space-4);
  flex-direction: column;
  gap: var(--space-2);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}
.mobile-nav a:hover { background: var(--color-primary-light); color: var(--color-primary); text-decoration: none; }
.mobile-nav-section {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  padding: var(--space-4) var(--space-4) var(--space-2);
}