:root {
  --bg: #080f17;
  --surface: rgba(12, 20, 31, 0.86);
  --surface-2: rgba(20, 31, 45, 0.95);
  --text: #f8fbff;
  --muted: #c3d2e4;
  --accent: #60a5fa;
  --line: rgba(169, 194, 224, 0.28);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Tahoma, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  position: relative;
  overflow-x: hidden;
}
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}
body::before {
  background-image:
    linear-gradient(rgba(7, 15, 26, 0.74), rgba(7, 15, 26, 0.74)),
    url("photo-1696110769466-aec575d42626.avif");
}
body::after {
  background-image:
    linear-gradient(rgba(7, 15, 26, 0.74), rgba(7, 15, 26, 0.74)),
    url("photo-1629991333400-448295157ed7.avif");
  animation: bgSwap 10s steps(1, end) infinite;
}
.container { width: min(1100px, 92%); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(9, 18, 30, 0.88); border-bottom: 1px solid var(--line); backdrop-filter: blur(8px);}
.nav { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .8rem 0; }
.nav h1 {
  margin: 0;
  font-size: clamp(1.05rem, 2.2vw, 1.5rem);
  color: #ffffff;
  letter-spacing: .01em;
  line-height: 1.25;
  max-width: 680px;
}
.nav p {
  margin: .2rem 0 0;
  color: #9f9f9f;
  font-size: .82rem;
}
nav { display: flex; gap: .5rem; flex-wrap: wrap; }
nav a { color: #e6f0fb; padding: .35rem .5rem; border-radius: 6px; text-decoration: none; }
nav a:hover { background: rgba(96, 165, 250, 0.22); color: #fff; }
.hero { padding: 3.5rem 0 2.5rem; background: radial-gradient(circle at top right, rgba(96,165,250,.24), transparent 44%);}
.hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 1.2rem; }
.tag { color: #c9e1ff; text-transform: uppercase; letter-spacing: .14em; font-size: .74rem; font-weight: 600; }
h2 { margin-top: .4rem; font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.1; font-weight: 800; }
.hero h2, .hero p { color: #fafafa; }
.hero-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin: 1rem 0; }
.chips { display: flex; gap: .45rem; flex-wrap: wrap; }
.chip { background: rgba(96, 165, 250, .16); border: 1px solid rgba(147, 197, 253, .46); color: #eaf3ff; padding: .28rem .62rem; border-radius: 999px; font-size: .74rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 1rem; box-shadow: 0 16px 28px rgba(5, 12, 22, 0.45); }
label { display: block; margin-top: .65rem; color: var(--muted); font-size: .9rem; }
input, select {
  width: 100%; margin-top: .3rem; min-height: 44px; border-radius: 8px;
  border: 1px solid rgba(176, 201, 231, 0.32); background: var(--surface-2); color: #f5f9ff; padding: .6rem .7rem;
}
.btn { border: 0; border-radius: 8px; min-height: 44px; padding: .65rem 1rem; cursor: pointer; display: inline-block; text-align:center; }
.btn.primary { background: linear-gradient(135deg, #60a5fa, #2563eb); color: #f8fbff; font-weight: 700; }
.btn.secondary { background: rgba(96, 165, 250, 0.12); color: #eff6ff; border: 1px solid rgba(147, 197, 253, 0.35); }
.btn.full { width: 100%; margin-top: .8rem; }
.form-message { min-height: 1.2rem; color: #d8d8d8; font-size: .9rem; }
.section { padding: 2.7rem 0; }
.section { color: #f1f1f1; }
.section h3, .section h4, .section li, .section p, .section strong, .section a { color: #f1f1f1; }
.section.alt {
  background: linear-gradient(180deg, rgba(14, 25, 40, 0.84), rgba(10, 19, 31, 0.82));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .9rem; }
.item { background: rgba(12, 20, 31, 0.86); border: 1px solid var(--line); border-radius: 10px; padding: .85rem; box-shadow: 0 8px 22px rgba(4, 10, 18, 0.4); }
.item h4 { margin: 0 0 .35rem; }
.small { color: var(--muted); font-size: .86rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.instructor-card {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 1rem;
  align-items: center;
  background: rgba(12, 20, 31, 0.86);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.34);
}
.instructor-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(176, 201, 231, 0.28);
}
.instructor-card h4 {
  margin: 0 0 .4rem;
}
.map-iframe { width: 100%; min-height: 260px; border: 0; border-radius: 10px; }
.site-footer { border-top: 1px solid var(--line); padding: 1.1rem 0 1.7rem; text-align: center; color: #dce9f8; }
.wa-float {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 56px;
  height: 56px;
  background: #22c55e;
  color: #052e16;
  font-weight: 800;
  border-radius: 50%;
  z-index: 20;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .92rem;
  letter-spacing: .02em;
  box-shadow: 0 10px 24px rgba(3,62,30,.32);
}
@media (max-width: 900px) {
  .hero-grid, .two-col { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .instructor-card { grid-template-columns: 1fr; }
  .instructor-card img { max-width: 280px; }
}
@media (max-width: 560px) {
  body { padding-bottom: 5.2rem; }
  body::before,
  body::after { background-position: center top; }
  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: .45rem;
  }
  .site-header { backdrop-filter: blur(6px); }
  .nav h1 {
    font-size: .92rem;
    line-height: 1.2;
    max-width: 100%;
  }
  .nav p {
    margin-top: .1rem;
    font-size: .72rem;
  }
  nav {
    width: 100%;
    display: flex;
    flex-wrap: nowrap;
    gap: .35rem;
    overflow-x: auto;
    padding-bottom: .15rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  nav a {
    white-space: nowrap;
    flex: 0 0 auto;
    background: rgba(96, 165, 250, 0.16);
    border: 1px solid rgba(147, 197, 253, 0.38);
    color: #eaf3ff;
    text-align: center;
    font-size: .76rem;
    font-weight: 600;
    min-height: 32px;
    padding: .35rem .5rem;
    display: inline-flex;
    align-items: center;
    border-radius: 8px;
  }
  .hero { padding-top: 2.4rem; }
  .hero h2 { font-size: clamp(1.35rem, 7vw, 1.7rem); }
  .chips { gap: .35rem; }
  .chip { font-size: .73rem; }
  .grid { grid-template-columns: 1fr; }
  .wa-float { right: .8rem; bottom: .8rem; width: 52px; height: 52px; }
}
@keyframes bgSwap {
  0%, 49.99% { opacity: 0; }
  50%, 100% { opacity: 1; }
}