* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --blue: #2ea9ff;
  --deep: #061a2c;
  --glass: rgba(5, 20, 35, 0.58);
  --border: rgba(255, 255, 255, 0.18);
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--deep);
}

body {
  min-height: 100vh;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    url("teide-canariaswind.png") center center / cover no-repeat;
}

.overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(3, 19, 34, 0.18), rgba(3, 14, 26, 0.76)),
    radial-gradient(circle at 50% 20%, transparent 0 30%, rgba(0,0,0,.24) 85%);
}

.content {
  position: relative;
  z-index: 1;
  width: min(100% - 32px, 980px);
  text-align: center;
  padding: 48px 0 28px;
}

.brand {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
}

.brand h1 {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 5.2rem);
  letter-spacing: -0.05em;
  text-shadow: 0 4px 25px rgba(0,0,0,.35);
}

.brand h1 span {
  color: var(--blue);
  font-style: italic;
  font-weight: 700;
}

.wind-mark {
  width: clamp(58px, 9vw, 100px);
}

.wind-mark span {
  display: block;
  height: 8px;
  margin: 9px 0;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--blue));
  transform: skewX(-18deg);
  animation: drift 4s ease-in-out infinite;
}

.wind-mark span:nth-child(2) {
  width: 82%;
  margin-left: 10%;
  animation-delay: .25s;
}

.wind-mark span:nth-child(3) {
  width: 62%;
  margin-left: 24%;
  animation-delay: .5s;
}

.tagline {
  margin: 6px 0 34px;
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  text-shadow: 0 2px 12px rgba(0,0,0,.45);
}

.card {
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: clamp(24px, 5vw, 48px);
  box-shadow: 0 20px 70px rgba(0,0,0,.34);
}

.eyebrow {
  margin: 0 0 8px;
  color: #9edcff;
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .78rem;
  font-weight: 700;
}

.card h2 {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1;
}

.intro {
  max-width: 720px;
  margin: 22px auto 30px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.6;
  color: rgba(255,255,255,.9);
}

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.features article {
  padding: 18px 10px;
  border-radius: 16px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.10);
}

.features strong,
.features span {
  display: block;
}

.features strong {
  font-size: 1rem;
}

.features span {
  margin-top: 5px;
  font-size: .86rem;
  color: rgba(255,255,255,.72);
}

footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 22px;
  font-size: .86rem;
  color: rgba(255,255,255,.75);
}

@keyframes drift {
  0%, 100% { transform: translateX(0) skewX(-18deg); opacity: .85; }
  50% { transform: translateX(10px) skewX(-18deg); opacity: 1; }
}

@media (max-width: 720px) {
  .content {
    padding-top: 28px;
  }

  .brand {
    gap: 10px;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  footer {
    flex-direction: column;
    gap: 5px;
  }
}

@media (max-width: 430px) {
  .card {
    border-radius: 18px;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .features article {
    padding: 13px;
  }
}