:root {
  --brand-blue: #0057b8;
  --brand-blue-dark: #003b7a;
  --brand-black: #111111;
  --brand-gray: #f5f7fa;
  --brand-text: #2c3440;
  --brand-white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--brand-text);
  background: var(--brand-white);
}
a { color: var(--brand-blue); }

#mainNav {
  background: rgba(255,255,255,0.96);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  transition: padding .2s ease, background .2s ease;
  padding: .75rem 0;
}
#mainNav.navbar-shrink { padding: .35rem 0; }
.brand-logo { height: 58px; width: auto; object-fit: contain; }
.navbar .nav-link {
  color: var(--brand-black);
  font-weight: 700;
  letter-spacing: .02em;
}
.navbar .nav-link:hover,
.navbar .nav-link.active { color: var(--brand-blue); }

.btn-brand {
  background: var(--brand-blue);
  border-color: var(--brand-blue);
  color: #fff;
  border-radius: 999px;
  padding: .8rem 1.35rem;
  font-weight: 800;
  text-decoration: none;
}
.btn-brand:hover {
  background: var(--brand-blue-dark);
  border-color: var(--brand-blue-dark);
  color: #fff;
}
.btn-outline-light {
  border-radius: 999px;
  padding: .8rem 1.35rem;
  font-weight: 800;
}

.parallax-section {
  background-attachment: fixed;
  background-position: center;
  background-size: cover;
}
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at 20% 40%, rgba(0,87,184,.45), transparent 28%),
    linear-gradient(135deg, rgba(0,0,0,.95), rgba(17,17,17,.82)),
    url('../assets/img/pythagore-logo.png');
  background-size: auto, auto, 720px auto;
  background-repeat: no-repeat;
  background-position: center, center, right 10% center;
}
.hero-overlay { position: absolute; inset: 0; background: rgba(0,0,0,.25); }
.hero-content { position: relative; z-index: 2; padding-top: 90px; }
.eyebrow,
.section-kicker {
  color: var(--brand-blue);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .16em;
  margin-bottom: .8rem;
}
.hero h1 {
  color: #fff;
  font-size: clamp(3rem, 8vw, 6.6rem);
  line-height: .95;
  font-weight: 900;
  margin-bottom: 1rem;
}
.hero .lead {
  color: rgba(255,255,255,.88);
  max-width: 760px;
  margin: 0 auto 2rem;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.section { padding: 6rem 0; }
.section.light { background: var(--brand-gray); }
.section h2,
.cta h2 {
  color: var(--brand-black);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 1rem;
}
.section p { font-size: 1.05rem; line-height: 1.75; }

.trust-card {
  background: var(--brand-black);
  border-radius: 28px;
  padding: 2rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1rem;
  box-shadow: 0 20px 60px rgba(0,0,0,.18);
}
.trust-card div {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  padding: 1.4rem;
}
.trust-card strong { display: block; color: #fff; font-size: 1.65rem; margin-bottom: .35rem; }
.trust-card span { color: rgba(255,255,255,.72); }

.service-card {
  background: #fff;
  height: 100%;
  padding: 2rem;
  border-radius: 22px;
  border: 1px solid rgba(0,0,0,.06);
  box-shadow: 0 12px 35px rgba(0,0,0,.06);
  transition: transform .2s ease, box-shadow .2s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 18px 45px rgba(0,0,0,.1); }
.service-card i { font-size: 2.4rem; color: var(--brand-blue); }
.service-card h3 { color: var(--brand-black); font-size: 1.3rem; font-weight: 900; margin: 1.1rem 0 .6rem; }
.service-card p { margin: 0; color: #5b6572; }

.cta {
  position: relative;
  padding: 7rem 0;
  color: #fff;
  background:
    radial-gradient(circle at 70% 20%, rgba(0,87,184,.55), transparent 30%),
    linear-gradient(135deg, rgba(0,0,0,.96), rgba(17,17,17,.88));
}
.cta-overlay { position: absolute; inset: 0; background: rgba(0,0,0,.12); }
.cta h2 { color: #fff; }
.cta p { color: rgba(255,255,255,.82); font-size: 1.15rem; margin-bottom: 2rem; }

.contact-list { display: grid; gap: .9rem; margin-top: 2rem; }
.contact-list a,
.contact-list span {
  display: flex;
  gap: .8rem;
  align-items: center;
  color: var(--brand-black);
  text-decoration: none;
  font-weight: 800;
}
.contact-list i { color: var(--brand-blue); }
.contact-form {
  background: var(--brand-gray);
  border-radius: 24px;
  padding: 2rem;
}
.form-control {
  min-height: 54px;
  border-radius: 14px;
  border: 1px solid #d9e1eb;
}
.form-control:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 .25rem rgba(0,87,184,.16);
}

.footer {
  background: var(--brand-black);
  color: rgba(255,255,255,.76);
  padding: 1.4rem 0;
}

@media (max-width: 991px) {
  .brand-logo { height: 48px; }
  .hero { background-size: auto, auto, 520px auto; background-position: center, center, center 62%; }
  .trust-card { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
  .parallax-section { background-attachment: scroll; }
  .section { padding: 4rem 0; }
  .hero h1 { font-size: 3.1rem; }
  .hero { min-height: 88vh; }
}