/* =============================================================================
   BRITCELL COMPONENT STYLES
   Navigation, Header, Footer, Forms, Nav mobile
   ============================================================================= */

/* ── Site Header / Navigation ──────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
}

[data-theme="dark"] .site-header {
  background: rgba(17, 24, 39, 0.95);
}

.site-header__inner {
  display: flex;
  align-items: center;
  height: 80px;
  gap: var(--space-6);
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__logo img {
  height: 36px;
  width: auto;
}

.site-header__logo-wordmark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-text);
}

.site-header__logo-wordmark span { color: var(--color-red); }

.site-header__logo-sub {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  line-height: 1;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.site-nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}

.site-nav__link:hover,
.site-nav__link.active {
  color: var(--color-navy);
  background: var(--color-navy-highlight);
}

/* Dropdown */
.site-nav__item { position: relative; }

.site-nav__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition);
  z-index: 200;
}

.site-nav__item:hover .site-nav__dropdown,
.site-nav__item:focus-within .site-nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.site-nav__dropdown a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.site-nav__dropdown a:hover {
  background: var(--color-navy-highlight);
  color: var(--color-navy);
}

.site-nav__cta {
  margin-left: var(--space-4);
}

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #1B3F8B;
  transition: all var(--transition);
  border: 1px solid rgba(27,63,139,0.25);
  background: transparent;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: rgba(27,63,139,0.08);
  color: #1B3F8B;
}

[data-theme="dark"] .theme-toggle {
  color: rgba(255,255,255,0.75);
  border-color: rgba(255,255,255,0.2);
}

[data-theme="dark"] .theme-toggle:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

/* Hamburger */
.menu-toggle {
  display: none;
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  align-items: center; justify-content: center;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.menu-toggle:hover { background: var(--color-surface-offset); }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-surface);
  padding: var(--space-8);
  overflow-y: auto;
  flex-direction: column;
}

.mobile-nav.open { display: flex; }

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-10);
}

.mobile-nav__links { display: flex; flex-direction: column; gap: var(--space-2); }

.mobile-nav__links a {
  font-size: var(--text-lg);
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--color-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

.mobile-nav__links a:hover { color: var(--color-navy); }

.mobile-nav__cta {
  margin-top: auto;
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (max-width: 1024px) {
  .site-nav { display: none; }
  .menu-toggle { display: flex; }
  .site-nav__cta { display: none; }
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  background: var(--color-navy-deeper);
  color: white;
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 50%, rgba(227,30,36,0.12) 0%, transparent 65%),
    radial-gradient(ellipse 50% 80% at 10% 80%, rgba(27,63,139,0.3) 0%, transparent 60%);
  pointer-events: none;
}

/* Grid overlay — engineering drawing feel */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(227,30,36,0.15);
  border: 1px solid rgba(227,30,36,0.3);
  color: #ff9999;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}

.hero__heading {
  font-size: var(--text-3xl);
  font-weight: 900;
  color: white;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
}

.hero__heading span { color: var(--color-red); }

.hero__lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  max-width: 54ch;
  line-height: 1.75;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.hero__stats {
  display: flex;
  gap: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--space-8);
}

.hero__stat-value {
  font-size: var(--text-xl);
  font-weight: 800;
  color: white;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.hero__stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

/* Hero visual — engineering schematic */
.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__schematic {
  width: 100%;
  max-width: 460px;
  aspect-ratio: 4/3;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* ── Section: How It Works / Process ──────────────────────── */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}

@media (max-width: 900px) { .process-steps { grid-template-columns: 1fr; } }

.process-step {
  position: relative;
  padding-left: var(--space-8);
}

.process-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 3rem;
  font-weight: 900;
  font-family: var(--font-display);
  letter-spacing: -0.04em;
  color: var(--color-navy-highlight);
  line-height: 1;
}

[data-theme="dark"] .process-step::before { color: var(--color-navy-dark); }

/* ── Sector cards ─────────────────────────────────────────── */
.sector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

@media (max-width: 900px) { .sector-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .sector-grid { grid-template-columns: 1fr; } }

.sector-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.sector-card:hover {
  border-color: var(--color-navy);
  background: var(--color-navy-highlight);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sector-card__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-navy-highlight);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-navy);
  margin-bottom: var(--space-4);
}

.sector-card__title {
  font-size: var(--text-sm);
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.sector-card__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── Capability list ──────────────────────────────────────── */
.capability-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.capability-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

.capability-list li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-navy);
  flex-shrink: 0;
  margin-top: 0.5em;
}

/* ── Trust bar ────────────────────────────────────────────── */
.trust-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-6);
}

.trust-bar__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  align-items: center;
  justify-content: center;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.trust-item svg { color: var(--color-navy); }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-list { display: flex; flex-direction: column; gap: var(--space-2); }

details.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

details.faq-item[open] { border-color: var(--color-navy); }

summary.faq-question {
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  list-style: none;
  color: var(--color-text);
  transition: background var(--transition);
}

summary.faq-question:hover { background: var(--color-surface-2); }
summary.faq-question::-webkit-details-marker { display: none; }

.faq-chevron {
  width: 20px; height: 20px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition);
}

details.faq-item[open] .faq-chevron { transform: rotate(180deg); }

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.75;
  max-width: none;
}

/* ── Page hero (inner pages) ─────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--color-navy-deeper) 0%, var(--color-navy) 100%);
  color: white;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-hero__inner { position: relative; z-index: 1; }

.page-hero__heading {
  font-size: var(--text-2xl);
  font-weight: 900;
  color: white;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.page-hero__lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  max-width: 60ch;
  line-height: 1.7;
}

/* ── CTA band ──────────────────────────────────────────────── */
.cta-band {
  background: var(--color-navy);
  color: white;
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 100% at 50% 110%, rgba(227,30,36,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-band__inner { position: relative; z-index: 1; }

.cta-band__heading {
  font-size: var(--text-2xl);
  font-weight: 900;
  color: white;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.cta-band__lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  max-width: 56ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* ── Form styles ──────────────────────────────────────────── */
.form-grid {
  display: grid;
  gap: var(--space-5);
}

.form-grid--2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 640px) { .form-grid--2 { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: var(--space-2); }

.form-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-label .required { color: var(--color-red); }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  transition: all var(--transition);
  line-height: 1.5;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-navy) 15%, transparent);
}

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

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.5;
}

.form-section-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-section-title:first-child { margin-top: 0; }

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
}

.form-checkbox input { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; accent-color: var(--color-navy); }
.form-checkbox label { font-size: var(--text-sm); color: var(--color-text-muted); cursor: pointer; max-width: none; }

.form-submit { margin-top: var(--space-6); }

.consent-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.7;
  max-width: none;
}

.consent-text a { color: var(--color-navy); text-decoration: underline; }

/* ── Site Footer ──────────────────────────────────────────── */
.site-footer {
  background: var(--color-navy-deeper);
  color: rgba(255,255,255,0.7);
  padding-block: var(--space-16);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

@media (max-width: 900px) { .site-footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .site-footer__grid { grid-template-columns: 1fr; } }

.footer-brand__tagline {
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-top: var(--space-4);
  margin-bottom: var(--space-5);
  max-width: 38ch;
}

.footer-col__heading {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-links a:hover { color: white; }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-2);
}

.footer-contact-item svg { color: rgba(255,255,255,0.4); margin-top: 2px; flex-shrink: 0; }

.site-footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-legal-links a {
  color: rgba(255,255,255,0.35);
  transition: color var(--transition);
}

.footer-legal-links a:hover { color: rgba(255,255,255,0.7); }

/* Britcell logo in footer — using mix-blend-mode for white bg */
.footer-logo {
  height: 32px;
  width: auto;
  mix-blend-mode: screen;
  margin-bottom: var(--space-2);
}

/* ── Breadcrumb ──────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-6);
}

.breadcrumb a { color: rgba(255,255,255,0.5); transition: color var(--transition); }
.breadcrumb a:hover { color: rgba(255,255,255,0.9); }
.breadcrumb__sep { opacity: 0.4; }

/* ── Sticky CTA bar (mobile) ─────────────────────────────── */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}

@media (max-width: 640px) { .sticky-cta { display: flex; gap: var(--space-3); } }
.sticky-cta .btn { flex: 1; justify-content: center; }

/* ── Qualification box ───────────────────────────────────── */
.qualification-box {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.qualification-box__heading {
  font-size: var(--text-base);
  font-weight: 700;
  font-family: var(--font-display);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

/* ── Spec table ─────────────────────────────────────────── */
.spec-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.spec-table th {
  background: var(--color-navy);
  color: white;
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.spec-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text-muted);
}
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:hover td { background: var(--color-surface-2); }

/* ── Animation (subtle, respect prefers-reduced-motion) ──── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-up {
  animation: fadeUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ── Highlighted text ──────────────────────────────────────── */
.highlight { color: var(--color-navy); font-weight: 700; }
.highlight--red { color: var(--color-red); font-weight: 700; }

/* ── Real logo image handling ────────────────────────────── */
.site-header__logo-img {
  height: 56px;
  width: auto;
  display: block;
  transition: opacity var(--transition);
}

/* On dark background headers (hero) logo is fine as-is since header bg is white/translucent */
[data-theme="dark"] .site-header__logo-img {
  /* Logo is navy+red on white — wrap in a rounded white bg pill in dark mode */
  background: white;
  border-radius: 6px;
  padding: 4px 8px;
}

/* Footer logo — white bg logo on dark footer */
.site-footer .site-header__logo img,
.site-footer img.footer-logo-img {
  height: 28px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}