/* Clyde Systems UK — design tokens + base system.
   System font stack only — no external fonts, keeps CSP locked to 'self'. */

:root {
  --color-bg: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-text: #1F2937;
  --color-text-muted: #5B6472;
  --color-navy: #0A2540;
  --color-primary: #0057B8;
  --color-primary-dark: #00448F;
  --color-accent: #00A3FF;
  --color-border: #E2E8F0;
  --color-success: #15803D;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 16px 40px rgba(10, 37, 64, 0.12);

  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); }

h1, h2, h3 { color: var(--color-navy); line-height: 1.15; margin: 0 0 var(--space-2); font-weight: 700; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 var(--space-2); color: var(--color-text); }
.text-muted { color: var(--color-text-muted); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section { padding: var(--space-6) 0; }
.section--tight { padding: var(--space-4) 0; }
.section--surface { background: var(--color-surface); }
.section--navy { background: var(--color-navy); color: #E7EEF7; }
.section--navy h2, .section--navy h3 { color: #FFFFFF; }
.section--navy p { color: #C6D4E6; }

.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: rgba(0, 87, 184, 0.08);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
  min-height: 48px;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-navy);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-block { width: 100%; }
.btn-lg { font-size: 1.1rem; padding: 1.05rem 1.9rem; }
.reassurance { font-size: 0.9rem; color: var(--color-text-muted); margin-top: var(--space-1); }

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-1) var(--space-3);
  max-width: var(--max-width);
  margin: 0 auto;
  gap: var(--space-2);
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand img { height: 36px; width: auto; }
.brand span { font-weight: 700; color: var(--color-navy); font-size: 1.05rem; }

.nav { display: none; align-items: center; gap: var(--space-3); }
.nav a { color: var(--color-navy); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.nav a:hover { color: var(--color-primary); }
.nav-dropdown { position: relative; }
.nav-dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 200px;
  padding: 0.5rem;
  margin-top: 0.5rem;
}
.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown:focus-within .nav-dropdown__menu { display: block; }
.nav-dropdown__menu a { display: block; padding: 0.5rem 0.6rem; border-radius: var(--radius-sm); }
.nav-dropdown__menu a:hover { background: var(--color-bg); }

.header-cta { display: none; }
.menu-toggle {
  display: inline-flex;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
  font-size: 1.1rem;
  cursor: pointer;
}

@media (min-width: 900px) {
  .nav { display: flex; }
  .header-cta { display: inline-flex; }
  .menu-toggle { display: none; }
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}
.mobile-nav.is-open { display: flex; }
.mobile-nav a { padding: 0.65rem 0.2rem; color: var(--color-navy); text-decoration: none; font-weight: 500; border-bottom: 1px solid var(--color-border); }
.mobile-nav .btn { margin-top: var(--space-1); }

@media (min-width: 900px) { .mobile-nav { display: none !important; } }

/* Hero */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  background: linear-gradient(180deg, #EEF4FC 0%, var(--color-bg) 65%);
}
.hero__grid {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}
@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1.1fr 0.9fr; }
}
.hero h1 { margin-bottom: var(--space-2); }
.hero__price {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: baseline;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  margin: var(--space-2) 0;
}
.hero__price strong { font-size: 1.4rem; color: var(--color-navy); }
.hero__price small { display: block; color: var(--color-text-muted); font-size: 0.8rem; }
.hero__ctas { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.trust-bar { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-3); font-size: 0.85rem; color: var(--color-text-muted); }
.trust-bar span { display: inline-flex; align-items: center; gap: 0.4rem; }

.hero__panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
}
.hero__panel h3 { margin-top: 0; }
.hero__panel ul { margin: 0; padding-left: 1.1rem; color: var(--color-text-muted); }
.hero__panel li { margin-bottom: 0.5rem; }

/* Grids and cards */
.grid { display: grid; gap: var(--space-3); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 700px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.card h3 { display: flex; align-items: center; gap: 0.6rem; }
.card ul { padding-left: 1.1rem; color: var(--color-text-muted); margin: var(--space-2) 0; }
.card li { margin-bottom: 0.4rem; }

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.product-card__tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.steps { counter-reset: step; }
.step { display: flex; gap: var(--space-2); align-items: flex-start; margin-bottom: var(--space-3); }
.step__num {
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--space-2) 0; }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--color-navy); list-style: none; display: flex; justify-content: space-between; gap: var(--space-2); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.3rem; color: var(--color-primary); }
.faq-item[open] summary::after { content: '\2212'; }
.faq-item p { margin-top: var(--space-1); color: var(--color-text-muted); }

.cta-band {
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: flex-start;
}
.cta-band h2, .cta-band h3 { color: #fff; }
.cta-band p { color: #C6D4E6; }
.cta-band .btn-secondary, .section--navy .btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}
.cta-band .btn-secondary:hover, .section--navy .btn-secondary:hover {
  color: #fff;
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
@media (min-width: 700px) {
  .cta-band { flex-direction: row; align-items: center; justify-content: space-between; }
}

.placeholder-page { padding: var(--space-7) 0; text-align: center; }
.placeholder-page .btn { margin-top: var(--space-3); }

/* Footer */
.site-footer {
  background: var(--color-navy);
  color: #C6D4E6;
  padding: var(--space-6) 0 var(--space-4);
}
.site-footer h3 { color: #fff; font-size: 1rem; }
.site-footer p { color: #C6D4E6; }
.site-footer .text-muted { color: #93A5BE; }
.site-footer a { color: #C6D4E6; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; margin-bottom: var(--space-4); }
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.5rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  font-size: 0.85rem;
}

/* Utility */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.hp { position: absolute; left: -9999px; top: -9999px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}