:root {
  --red: #d11f1f;
  --red-dark: #a31616;
  --red-bright: #ff3b3b;
  --black: #0a0a0a;
  --ink: #141414;
  --paper: #ffffff;
  --muted: #c8c8c8;
  --rule: rgba(255, 255, 255, 0.12);
}

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

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  background-color: var(--black);
  color: var(--paper);
  font-family: 'Helvetica Neue', Arial, system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

header {
  background: var(--paper);
  text-align: center;
  padding: 16px 24px;
}

header img.logo {
  max-width: 100%;
  max-height: 120px;
  object-fit: contain;
}

main {
  background-color: var(--ink);
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 0 0 64px;
}

img.hero {
  width: 100%;
  display: block;
}

main h1,
main h2,
main p,
main ul,
main .gallery,
main form,
main hr {
  margin-left: 40px;
  margin-right: 40px;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-top: 40px;
  margin-bottom: 24px;
  color: var(--paper);
  border-left: 6px solid var(--red);
  padding-left: 18px;
}

h2 {
  font-size: 1.6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin-top: 40px;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--paper);
  margin-top: 24px;
  margin-bottom: 8px;
  padding-left: 14px;
  border-left: 4px solid var(--red);
}

main h3 {
  margin-left: 40px;
  margin-right: 40px;
}

dl.program-details {
  margin: 8px 40px 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
}

dl.program-details > div {
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 10px 14px;
}

dl.program-details dt {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 2px;
}

dl.program-details dd {
  margin: 0;
  color: var(--paper);
  font-weight: 500;
}

p.instructor-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--paper);
  padding-left: 14px;
  border-left: 4px solid var(--red);
  margin: 0 0 14px;
}

.instructor {
  margin: 16px 40px 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  align-items: start;
}

.instructor-photo {
  width: 100%;
  display: block;
  border-left: 4px solid var(--red);
}

.instructor-body ul {
  margin: 0;
  grid-template-columns: 1fr;
}

p {
  color: #e8e8e8;
  margin-top: 0;
  margin-bottom: 18px;
}

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin-top: 40px;
  margin-bottom: 8px;
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 8px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
}

ul li {
  position: relative;
  padding: 10px 12px 10px 38px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  font-weight: 500;
}

ul li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  background: var(--red);
  clip-path: polygon(20% 50%, 0 70%, 40% 100%, 100% 25%, 80% 10%, 40% 70%);
}

.gallery {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  margin-bottom: 32px;
}

.gallery img {
  width: 100%;
  display: block;
  border-left: 3px solid var(--red);
}

form {
  background: #000;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--red);
  padding: 28px;
  margin-top: 32px;
  border-radius: 4px;
}

form::before {
  content: "Get your child started";
  display: block;
  font-size: 1.3rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}

form::after {
  display: none;
}

input, textarea {
  display: block;
  width: 100%;
  font: inherit;
  font-size: 1rem;
  margin: 12px 0;
  padding: 12px 14px;
  background: #1a1a1a;
  color: var(--paper);
  border: 1px solid #333;
  border-radius: 3px;
  transition: border-color 0.15s ease;
}

input::placeholder, textarea::placeholder {
  color: #888;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(209, 31, 31, 0.25);
}

textarea {
  height: 180px;
  resize: vertical;
}

input[type=submit] {
  background: var(--red);
  color: var(--paper);
  border: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 14px 20px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

input[type=submit]:hover {
  background: var(--red-bright);
}

input[type=submit]:active {
  transform: translateY(1px);
  background: var(--red-dark);
}

@media (max-width: 700px) {
  body { font-size: 17px; }

  main h1,
  main h2,
  main p,
  main ul,
  main .gallery,
  main form,
  main hr,
  main h3,
  main .instructor,
  main dl.program-details {
    margin-left: 20px;
    margin-right: 20px;
  }

  .instructor {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .instructor-photo {
    max-width: 280px;
  }

  h1 {
    font-size: 1.65rem;
    margin-top: 28px;
    padding-left: 14px;
    border-left-width: 5px;
  }

  h2 { font-size: 1.3rem; margin-top: 32px; }
  h3 { font-size: 1.05rem; }

  ul,
  dl.program-details {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  form { padding: 20px; }
  form::before { font-size: 1.15rem; }
}