/* ============================================
   SLIPTESTING.CO.UK — GLOBAL STYLESHEET
   Surface Performance brand — dark green palette
   Bebas Neue (display) / DM Sans (body)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap');

:root {
  --sp-green-dark: #0d2a1f;
  --sp-green: #1a4d35;
  --sp-green-mid: #2d6a4f;
  --sp-green-light: #d4e7dc;
  --sp-accent: #c8e6c9;
  --sp-cream: #faf8f3;
  --sp-paper: #f4f1e8;
  --sp-ink: #0a1f15;
  --sp-muted: #5a6b60;
  --sp-rule: #c8cdc4;

  --font-display: 'Bebas Neue', 'Impact', sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-xxl: 10rem;

  --max-width: 1280px;
  --max-reading: 680px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font-body);
  background: var(--sp-cream);
  color: var(--sp-ink);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--sp-green-dark);
}

h1 { font-size: clamp(3rem, 8vw, 7rem); letter-spacing: -0.01em; line-height: 0.95; }
h2 { font-size: clamp(2.25rem, 5vw, 4rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); letter-spacing: 0.02em; }
h4 { font-size: 1.5rem; letter-spacing: 0.03em; }

p { margin-bottom: 1.25rem; max-width: var(--max-reading); }

p.lead {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--sp-green-dark);
}

a {
  color: var(--sp-green);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover { color: var(--sp-green-mid); }

strong { font-weight: 700; }
em { font-style: italic; }

ul, ol { margin-bottom: 1.25rem; padding-left: 1.5rem; max-width: var(--max-reading); }
li { margin-bottom: 0.5rem; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-weight: 500;
  color: var(--sp-green-mid);
  margin-bottom: 1rem;
  display: block;
}
.eyebrow.on-dark { color: var(--sp-accent); }

/* LAYOUT */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-md); }
.container-narrow { max-width: 900px; margin: 0 auto; padding: 0 var(--space-md); }

section { padding: var(--space-xl) 0; }
section.tight { padding: var(--space-lg) 0; }
section.large { padding: var(--space-xxl) 0; }

.section-dark { background: var(--sp-green-dark); color: var(--sp-cream); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--sp-cream); }
.section-dark a { color: var(--sp-accent); }

.section-green { background: var(--sp-green); color: var(--sp-cream); }
.section-green h1, .section-green h2, .section-green h3 { color: var(--sp-cream); }

.section-paper { background: var(--sp-paper); }

/* HEADER */
.site-header {
  background: var(--sp-green-dark);
  color: var(--sp-cream);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: 0.05em;
  color: var(--sp-cream);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}
.site-logo .dot { color: var(--sp-accent); }

.site-nav { display: flex; gap: 2rem; align-items: center; }

.site-nav a {
  color: var(--sp-cream);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}
.site-nav a:hover { opacity: 1; }

.nav-cta {
  background: var(--sp-accent);
  color: var(--sp-green-dark) !important;
  padding: 0.6rem 1.2rem;
  border-radius: 2px;
  opacity: 1 !important;
  font-weight: 700;
}
.nav-cta:hover { background: var(--sp-cream); }

.menu-toggle { display: none; }

@media (max-width: 820px) {
  .site-nav { display: none; }
  .site-nav.mobile-visible {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--sp-green-dark);
    padding: var(--space-md);
    gap: 1rem;
    align-items: flex-start;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .menu-toggle {
    display: block;
    background: none;
    border: 1px solid var(--sp-cream);
    color: var(--sp-cream);
    padding: 0.4rem 0.8rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    letter-spacing: 0.05em;
  }
}

/* HERO */
.hero {
  background: var(--sp-green-dark);
  color: var(--sp-cream);
  padding: var(--space-xl) 0 var(--space-xxl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(45,106,79,0.4) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 90%, rgba(26,77,53,0.3) 0%, transparent 50%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero h1 {
  color: var(--sp-cream);
  max-width: 20ch;
  margin-bottom: 1.5rem;
}
.hero h1 .accent { color: var(--sp-accent); }

.hero p.lead {
  color: var(--sp-accent);
  max-width: 50ch;
  font-size: 1.35rem;
  margin-bottom: 2.5rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.15);
  max-width: 900px;
}

.hero-meta-item .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--sp-accent);
  margin-bottom: 0.5rem;
}

.hero-meta-item .value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--sp-cream);
  line-height: 1;
}

.hero-meta-item .sublabel {
  font-size: 0.85rem;
  color: var(--sp-accent);
  opacity: 0.8;
  margin-top: 0.25rem;
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--sp-accent);
  color: var(--sp-green-dark);
  border-color: var(--sp-accent);
}
.btn-primary:hover { background: var(--sp-cream); border-color: var(--sp-cream); }

.btn-secondary {
  background: transparent;
  color: var(--sp-cream);
  border-color: var(--sp-cream);
}
.btn-secondary:hover { background: var(--sp-cream); color: var(--sp-green-dark); }

.btn-dark {
  background: var(--sp-green-dark);
  color: var(--sp-cream);
  border-color: var(--sp-green-dark);
}
.btn-dark:hover { background: transparent; color: var(--sp-green-dark); }

.btn-group { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

/* GRIDS */
.grid { display: grid; gap: var(--space-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--sp-cream);
  border: 1px solid var(--sp-rule);
  padding: var(--space-md);
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover { border-color: var(--sp-green); transform: translateY(-2px); }
.card h3 { margin-bottom: 0.75rem; font-size: 1.75rem; }
.card p { color: var(--sp-muted); margin-bottom: 0; flex-grow: 1; }

.card a.card-link {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--sp-green);
}

.card a.card-link::after { content: ' →'; transition: margin-left 0.2s ease; }
.card:hover a.card-link::after { margin-left: 0.25rem; }

.card-dark { background: var(--sp-green-dark); color: var(--sp-cream); border-color: var(--sp-green-dark); }
.card-dark h3 { color: var(--sp-cream); }
.card-dark p { color: var(--sp-accent); }
.card-dark a.card-link { color: var(--sp-accent); }

/* FEATURE BLOCKS */
.feature-block { padding: var(--space-lg) 0; border-top: 1px solid var(--sp-rule); }

.feature-split {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-lg);
  align-items: start;
}

@media (max-width: 820px) {
  .feature-split { grid-template-columns: 1fr; gap: var(--space-md); }
}

.feature-number {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--sp-green);
  line-height: 1;
  opacity: 0.4;
}

/* STATS */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2px;
  background: var(--sp-rule);
  border: 1px solid var(--sp-rule);
  margin: var(--space-md) 0;
}

.stat { background: var(--sp-cream); padding: var(--space-md); }
.stat .number { font-family: var(--font-display); font-size: 3.5rem; color: var(--sp-green); line-height: 1; }
.stat .label { font-size: 0.85rem; color: var(--sp-muted); margin-top: 0.5rem; text-transform: uppercase; letter-spacing: 0.1em; }

/* COMPARISON TABLE */
.compare { background: var(--sp-cream); border: 1px solid var(--sp-rule); overflow-x: auto; margin: var(--space-md) 0; }

.compare table { width: 100%; border-collapse: collapse; min-width: 600px; }

.compare th, .compare td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--sp-rule);
  font-size: 0.95rem;
}

.compare th {
  background: var(--sp-green-dark);
  color: var(--sp-cream);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.compare tr:last-child td { border-bottom: none; }

.compare td:first-child {
  font-weight: 500;
  background: var(--sp-paper);
  width: 35%;
}

.compare .yes { color: var(--sp-green); font-weight: 700; }
.compare .no { color: #a33; font-weight: 500; }

/* FAQ */
.faq-list { max-width: 900px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--sp-rule);
  padding: 1.5rem 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--sp-green-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  letter-spacing: 0.02em;
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 2rem;
  color: var(--sp-green);
  flex-shrink: 0;
  transition: transform 0.2s ease;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item .faq-body {
  padding-top: 1rem;
  color: var(--sp-muted);
}
.faq-item .faq-body p { max-width: none; }

/* CTA BAND */
.cta-band { background: var(--sp-green); color: var(--sp-cream); padding: var(--space-lg) 0; text-align: center; }
.cta-band h2 { color: var(--sp-cream); margin-bottom: 1rem; }
.cta-band p.lead { color: var(--sp-accent); margin: 0 auto 2rem; }

/* FOOTER */
.site-footer { background: var(--sp-green-dark); color: var(--sp-accent); padding: var(--space-lg) 0 var(--space-md); font-size: 0.9rem; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }

.site-footer h4 { color: var(--sp-cream); font-size: 1.1rem; margin-bottom: 1rem; letter-spacing: 0.1em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.5rem; }
.site-footer a { color: var(--sp-accent); opacity: 0.75; text-decoration: none; transition: opacity 0.2s ease; }
.site-footer a:hover { opacity: 1; }

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  opacity: 0.7;
}

/* PROSE */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin-top: var(--space-md); margin-bottom: 1rem; }
.prose h3 { margin-top: var(--space-md); margin-bottom: 0.75rem; }
.prose p, .prose ul, .prose ol { max-width: none; }

.prose .callout {
  background: var(--sp-paper);
  border-left: 4px solid var(--sp-green);
  padding: 1.5rem;
  margin: 2rem 0;
}
.prose .callout p { margin: 0; }
.prose .callout.warning { border-left-color: #b04a2f; background: #f9efe9; }

/* BREADCRUMBS */
.breadcrumb { background: var(--sp-paper); padding: 0.75rem 0; font-size: 0.85rem; border-bottom: 1px solid var(--sp-rule); }

.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: none;
}

.breadcrumb li { margin: 0; color: var(--sp-muted); }
.breadcrumb li::after { content: '/'; margin-left: 0.5rem; color: var(--sp-rule); }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb a { color: var(--sp-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--sp-green); text-decoration: underline; }

/* UTILITIES */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

.divider-heavy {
  height: 3px;
  background: var(--sp-green-dark);
  border: none;
  margin: var(--space-lg) 0;
  max-width: 60px;
}

.ukas-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--sp-green);
  color: var(--sp-cream);
  padding: 0.4rem 0.8rem;
  border-radius: 2px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
}
.ukas-badge::before { content: '✓'; font-size: 0.9rem; font-weight: 900; }

/* Table of locations */
.location-index {
  columns: 3;
  column-gap: 2rem;
  margin: var(--space-md) 0;
}
@media (max-width: 820px) { .location-index { columns: 2; } }
@media (max-width: 500px) { .location-index { columns: 1; } }

.location-index a {
  display: block;
  padding: 0.4rem 0;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--sp-ink);
  border-bottom: 1px dotted var(--sp-rule);
  break-inside: avoid;
}
.location-index a:hover { color: var(--sp-green); }