/* ===========================
   Spearman Analytics - Styles
   =========================== */

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

:root {
  --navy: #0f1b2d;
  --slate: #1a2942;
  --steel: #2c3e5a;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --light: #e8ecf1;
  --muted: #94a3b8;
  --white: #ffffff;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--light);
  background: var(--navy);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 27, 45, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(59, 130, 246, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-rho {
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: 300;
  margin-right: 4px;
  font-style: italic;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* --- Buttons --- */

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  padding: 10px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:active {
  transform: scale(0.98);
}

.btn-sm {
  padding: 7px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* --- Hero --- */

.hero {
  padding: 160px 0 120px;
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
    var(--navy);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-sub {
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--muted);
  line-height: 1.7;
}

/* --- Services --- */

.services {
  padding: 100px 0;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-sub {
  max-width: 600px;
  margin: 0 auto 48px;
  text-align: center;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  background: var(--slate);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 36px 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.25);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 300;
  font-family: var(--mono);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* --- About --- */

.about {
  padding: 100px 0;
  background: var(--slate);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.about-inner {
  max-width: 720px;
}

.about-text h2 {
  text-align: left;
  margin-bottom: 8px;
}

.about-text h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* --- Contact --- */

.contact {
  padding: 100px 0;
}

.contact-inner {
  max-width: 600px;
}

.contact-form {
  margin-top: 8px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--light);
  margin-bottom: 6px;
}

.optional {
  font-weight: 400;
  color: var(--muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--slate);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: var(--white);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

.contact-alt {
  margin-top: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact-alt a {
  color: var(--accent);
  text-decoration: none;
}

.contact-alt a:hover {
  text-decoration: underline;
}

/* --- Footer --- */

.footer {
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

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

.footer p {
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-domain {
  font-family: var(--mono);
  letter-spacing: 0.03em;
}

/* --- Responsive --- */

@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 130px 0 80px;
  }

  .services,
  .about,
  .contact {
    padding: 72px 0;
  }

  .nav-links {
    gap: 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav-links li:not(:last-child) {
    display: none;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 1rem;
  }
}