/* =====================================================
   Left Join Labs — Styles
   ===================================================== */

:root {
  --color-bg-dark: #0f1729;
  --color-bg-dark-alt: #141d32;
  --color-bg-light: #fafaf8;
  --color-bg-white: #ffffff;
  --color-accent: #e8a028;
  --color-accent-hover: #d4901e;
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #4b5563;
  --color-text-muted: #9ca3af;
  --color-text-on-dark: #e5e7eb;
  --color-text-on-dark-muted: #8b95a8;
  --color-border: #e5e7eb;
  --color-border-dark: #1e2a45;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  --max-width: 1060px;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  background: var(--color-bg-white);
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

/* ---------- Layout ---------- */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-dark);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 41, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-on-dark);
  letter-spacing: -0.5px;
}

.logo-symbol {
  color: var(--color-accent);
}

.nav {
  display: flex;
  gap: 2.25rem;
}

.nav a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-on-dark-muted);
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-on-dark);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  padding: 8rem 0 7rem;
  background: var(--color-bg-dark);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(232, 160, 40, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-bg-white);
  margin-bottom: 1.5rem;
  max-width: 600px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-text-on-dark-muted);
  max-width: 520px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

/* ---------- Section shared ---------- */
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 2.5rem;
  color: inherit;
}

/* ---------- Services ---------- */
.services {
  padding: 6rem 0;
  background: var(--color-bg-light);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.service-block {
  padding: 2.5rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.service-block:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.service-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 1rem;
}

.service-block h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

.service-block p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.97rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.85rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* ---------- Built By Us ---------- */
.built-by-us {
  padding: 6rem 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  position: relative;
  overflow: hidden;
}

.built-by-us::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(232, 160, 40, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.built-by-us .section-title {
  color: var(--color-bg-white);
  position: relative;
}

.product-card {
  position: relative;
  padding: 2.5rem;
  background: var(--color-bg-dark-alt);
  border: 1px solid var(--color-border-dark);
  border-radius: 10px;
  max-width: 560px;
}

.product-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.product-info p {
  color: var(--color-text-on-dark-muted);
  font-size: 0.97rem;
  line-height: 1.7;
}

/* ---------- About ---------- */
.about {
  padding: 6rem 0;
  background: var(--color-bg-light);
}

.about-content {
  max-width: 620px;
}

.about-content p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.97rem;
}

.about-credentials {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-weight: 500;
  color: var(--color-text-primary) !important;
}

/* ---------- Contact ---------- */
.contact {
  padding: 6rem 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.contact .section-title {
  color: var(--color-bg-white);
}

.contact-sub {
  color: var(--color-text-on-dark-muted);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.contact-email {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: var(--color-accent);
  padding: 0.75rem 0;
  border-bottom: 2px solid var(--color-accent);
  transition: opacity 0.2s;
}

.contact-email:hover {
  opacity: 0.8;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border-dark);
  padding: 1.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-on-dark-muted);
}

.footer-logo .logo-symbol {
  color: var(--color-accent);
}

.footer-copy {
  color: var(--color-text-on-dark-muted);
  font-size: 0.8rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .service-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 23, 41, 0.98);
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--color-border-dark);
  }

  .nav.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 5rem 0 4rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .services,
  .built-by-us,
  .about,
  .contact {
    padding: 4rem 0;
  }

  .service-block {
    padding: 1.75rem;
  }

  .product-card {
    padding: 1.75rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 400px) {
  .hero h1 {
    font-size: 1.85rem;
  }

  .contact-email {
    font-size: 1rem;
  }

  .tag {
    font-size: 0.7rem;
    padding: 0.3rem 0.7rem;
  }
}