/* Base */
:root {
  --primary: #0d6efd;
  --dark: #0b2a4a;
  --light: #f8f9fb;
  --gray: #6c757d;
}

* { box-sizing: border-box; }

body {
  font-family: 'Roboto', 'Open Sans', system-ui, -apple-system, sans-serif;
  background: #fff;
  color: #1f2933;
  line-height: 1.6;
}

a { text-decoration: none; }

/* Hero */
.hero-section {
  background: linear-gradient(120deg, rgba(13,110,253,.85), rgba(13,110,253,.65)), url('https://images.unsplash.com/photo-1521791055366-0d553872125f?auto=format&fit=crop&w=1600&q=80') center/cover fixed;
  min-height: 70vh;
}

.hero-section .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.35), rgba(0,0,0,.55));
}

.hero-section h1, .hero-section p { position: relative; z-index: 1; }

/* Cards */
.course-card, .testimonial-card {
  background: #fff;
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
  transition: transform .25s ease, box-shadow .25s ease;
}

.course-card:hover, .testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 40px rgba(0,0,0,.08);
}

.icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
}

/* CTA strip */
.bg-gradient-primary {
  background: linear-gradient(90deg, #0d6efd, #0b5ed7);
}

/* Floating buttons */
.floating-btn {
  position: fixed;
  z-index: 1050;
  bottom: 18px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 20px rgba(0,0,0,.25);
}

.floating-btn a {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.4rem;
}

.floating-btn.whatsapp { left: 18px; background: #25d366; }
.floating-btn.call { right: 18px; background: #0d6efd; }

.floating-btn:hover { transform: translateY(-2px); }

/* Contact panel */
.contact-panel {
  position: fixed;
  right: 18px;
  bottom: 90px;
  width: 340px;
  max-width: calc(100% - 32px);
  background: #0b2141;
  border-radius: 14px;
  transform: translateY(30px);
  opacity: 0;
  pointer-events: none;
  transition: all .35s ease;
}

.contact-panel.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Sections */
section h2 { color: var(--dark); }

/* Footer */
footer a:hover { color: #f5f5f5; }

/* Utilities */
.shadow-soft {
  box-shadow: 0 12px 28px rgba(0,0,0,.12);
}

@media (max-width: 767px) {
  .hero-section { min-height: unset; }
  .floating-btn.whatsapp { left: 12px; }
  .floating-btn.call { right: 12px; }
  .floating-btn { bottom: 12px; width: 50px; height: 50px; }
}