/* ===== CSS CUSTOM PROPERTIES — keyed off full T.C.S logo palette ===== */
:root {
  --primary: #0d1f35;       /* deep navy */
  --primary-dark: #070e1c;
  --accent: #d42b1b;        /* red flame */
  --accent-dark: #b52416;
  --accent-warm: #f97316;   /* orange mid-flame */
  --accent-cool: #1565c0;   /* blue fish/wings */
  --accent-purple: #7c3aed; /* logo circle border */
  --accent-green: #16a34a;  /* eco leaf */
  --light: #f1f5f9;
  --mid: #64748b;
  --text: #1e293b;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.10);
  --radius: 10px;
  --transition: 0.25s ease;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== UTILITIES ===== */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--primary);
}
.section-title span { color: var(--accent); }
.section-intro {
  margin-top: 14px;
  font-size: 1.05rem;
  color: var(--mid);
  max-width: 560px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.6);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: var(--white); }

/* ===== NAV ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--primary);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo-img {
  height: 52px;
  width: 52px;
  object-fit: contain;
  border-radius: 50%;
  background: transparent;
}
.nav-logo-placeholder {
  height: 46px;
  width: 46px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.82rem;
  color: var(--primary);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.nav-brand { color: var(--white); }
.nav-brand strong { display: block; font-size: 1.05rem; font-weight: 800; letter-spacing: 0.02em; }
.nav-brand small { font-size: 0.72rem; color: rgba(255,255,255,0.55); letter-spacing: 0.06em; text-transform: uppercase; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  color: rgba(255,255,255,0.78);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 5px;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--white); background: rgba(255,255,255,0.08); }
.nav-links .nav-cta {
  background: var(--accent);
  color: var(--white);
  padding: 9px 18px;
}
.nav-links .nav-cta:hover { background: var(--accent-dark); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #070e1c 0%, #0d1f35 45%, #0f1e3a 70%, #0d1a30 100%);
  padding: 90px 0 80px;
  overflow: hidden;
}
/* Subtle dual-tone glow — red (hot) left, blue (cool) right */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 60% at 15% 60%, rgba(212,43,27,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 45% 50% at 85% 40%, rgba(26,101,176,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.4);
  color: #c4b5fd;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 22px;
}
.hero-badge::before { content: '●'; color: var(--accent-purple); font-size: 0.6rem; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.72);
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}
.hero-stat span {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.hero-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(8px);
}
.hero-card h3 {
  color: var(--white);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.hero-service-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.hero-service-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
}
.hero-service-item .icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(249,115,22,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.hero-contact-box {
  background: var(--accent);
  border-radius: 10px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-contact-box .phone-icon {
  font-size: 1.5rem;
}
.hero-contact-box div { color: var(--white); }
.hero-contact-box small { font-size: 0.75rem; opacity: 0.85; display: block; }
.hero-contact-box a {
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

/* ===== TRUST BAR ===== */
.trust-bar {
  background: var(--light);
  border-bottom: 1px solid #e2e8f0;
  padding: 18px 0;
}
.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
}
.trust-item .tick {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* ===== SERVICES ===== */
.services { padding: 90px 0; }
.services-header { text-align: center; margin-bottom: 56px; }
.services-header .section-intro { margin: 14px auto 0; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.service-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-3px); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  background: #fdf0ee;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}
.service-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--primary); }
.service-card p { font-size: 0.93rem; color: var(--mid); line-height: 1.65; margin-bottom: 18px; }
.service-card ul { display: flex; flex-direction: column; gap: 6px; }
.service-card li {
  font-size: 0.88rem;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.service-card li::before { content: '✓'; color: var(--accent); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

/* ===== COMMERCIAL / DOMESTIC SPLIT ===== */
.sectors { padding: 0 0 90px; }
.sectors-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sector-block {
  border-radius: 14px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}
.sector-block.commercial { background: var(--primary); color: var(--white); }
.sector-block.domestic { background: var(--light); }
.sector-block h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 12px; }
.sector-block.commercial h3 { color: var(--white); }
.sector-block.domestic h3 { color: var(--primary); }
.sector-block p { font-size: 0.95rem; margin-bottom: 24px; }
.sector-block.commercial p { color: rgba(255,255,255,0.72); }
.sector-block.domestic p { color: var(--mid); }
.sector-list { display: flex; flex-direction: column; gap: 10px; }
.sector-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
  font-weight: 600;
}
.sector-block.commercial .sector-list li { color: rgba(255,255,255,0.88); }
.sector-block.domestic .sector-list li { color: var(--text); }
.sector-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.sector-block .sector-tag {
  position: absolute;
  top: 32px;
  right: 32px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(212,43,27,0.18);
  color: var(--accent-warm);
  border: 1px solid rgba(212,43,27,0.3);
}

/* ===== WHY TCS ===== */
.why { padding: 90px 0; background: var(--light); }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.why-features { display: flex; flex-direction: column; gap: 28px; margin-top: 32px; }
.why-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.why-feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.why-feature h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; color: var(--primary); }
.why-feature p { font-size: 0.9rem; color: var(--mid); }
.why-visual {
  background: var(--primary);
  border-radius: 16px;
  padding: 40px;
  color: var(--white);
}
.why-visual h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.cert-list { display: flex; flex-direction: column; gap: 16px; }
.cert-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}
.cert-badge {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.cert-item div strong { display: block; font-size: 0.9rem; font-weight: 700; }
.cert-item div small { font-size: 0.78rem; color: rgba(255,255,255,0.55); }
.isle-of-man-note {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 8px;
  background: rgba(26,101,176,0.18);
  border: 1px solid rgba(26,101,176,0.35);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== CONTACT ===== */
.contact { padding: 90px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.contact-details { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  transition: var(--transition);
}
.contact-item:hover { border-color: var(--accent); }
.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #fdf0ee;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--mid); margin-bottom: 4px; }
.contact-item a, .contact-item p { font-size: 0.97rem; font-weight: 600; color: var(--primary); }
.contact-item a:hover { color: var(--accent); }
.contact-form {
  background: var(--light);
  border-radius: 14px;
  padding: 40px;
}
.contact-form h3 { font-size: 1.25rem; font-weight: 800; color: var(--primary); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid #e2e8f0;
  border-radius: 7px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: var(--transition);
  outline: none;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212,43,27,0.12); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-submit { width: 100%; padding: 15px; border-radius: 7px; font-size: 1rem; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.65);
  padding: 52px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand strong { display: block; color: var(--white); font-size: 1.1rem; font-weight: 800; margin-bottom: 4px; }
.footer-brand small { font-size: 0.78rem; color: rgba(255,255,255,0.4); }
.footer-brand p { font-size: 0.88rem; margin-top: 14px; line-height: 1.65; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.social-link {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
  color: rgba(255,255,255,0.7);
}
.social-link:hover { background: var(--accent); color: var(--white); }
.footer-col h4 { color: var(--white); font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 9px; }
.footer-col li a { font-size: 0.88rem; transition: var(--transition); }
.footer-col li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}

/* ===== SYMBOL STRIP (flame · snowflake · leaf) ===== */
.symbol-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 28px 0 0;
}
.symbol-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}
.symbol-item .sym { font-size: 1.6rem; }
.symbol-item.sym-fire .sym { color: var(--accent-warm); }
.symbol-item.sym-cold .sym { color: #60a5fa; }
.symbol-item.sym-eco .sym { color: #4ade80; }
.symbol-sep { color: rgba(255,255,255,0.2); font-size: 1.2rem; }

/* ===== APPROVED INSTALLERS ===== */
.brands {
  padding: 64px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.brands::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 0% 50%, rgba(212,43,27,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 80% at 100% 50%, rgba(26,101,176,0.14) 0%, transparent 60%);
  pointer-events: none;
}
.brands-header {
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}
.brands-header .section-label { color: rgba(255,255,255,0.5); }
.brands-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
}
.brands-header h2 span { color: var(--accent-warm); }
.brands-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
}
.brand-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 18px 32px;
  transition: var(--transition);
  min-width: 150px;
}
.brand-chip:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}
.brand-chip .brand-name {
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}
/* Individual brand colours */
.brand-samsung .brand-name { color: #1a8cff; }
.brand-lg .brand-name { color: #e50914; }
.brand-electriq .brand-name {
  color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.1;
}
.brand-electriq .brand-name small {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
}
.brand-fujitsu .brand-name { color: #ff2a2a; }
.brand-alpha .brand-name { color: #e8001e; font-style: italic; font-size: 1.35rem; }
.brands-footer {
  text-align: center;
  margin-top: 28px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
  position: relative;
}

/* ===== MOBILE ===== */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { display: none; }
  .sectors-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--primary-dark); padding: 16px 24px 24px; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .trust-inner { gap: 16px; }
  .services-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .sector-block { padding: 36px 28px; }
  .contact-form { padding: 28px 24px; }
}