:root {
  --bg-0: #0a0e17;
  --text: #eef2f8;
  --muted: #94a3b8;
  --accent-a: #22d3ee;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding:
    max(20px, env(safe-area-inset-top, 0px))
    max(20px, env(safe-area-inset-right, 0px))
    max(20px, env(safe-area-inset-bottom, 0px))
    max(20px, env(safe-area-inset-left, 0px));
}

.bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    url("hero-bg.png") center center / cover no-repeat,
    var(--bg-0);
}

.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 14, 23, 0.28) 0%,
    rgba(10, 14, 23, 0.5) 45%,
    rgba(10, 14, 23, 0.78) 100%
  );
}

.card {
  position: relative;
  z-index: 1;
  width: min(100%, 480px);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 44px) clamp(18px, 3.5vw, 36px);
  text-align: center;
  background: rgba(10, 18, 40, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: clamp(16px, 2.5vw, 22px);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

.logo {
  display: block;
  width: clamp(160px, 42vw, 260px);
  max-width: 80%;
  height: auto;
  margin: 0 auto clamp(14px, 2.5vw, 22px);
}

.welcome {
  margin: 4px 0 8px;
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 800;
  letter-spacing: 0.3px;
  line-height: 1.15;
  background: linear-gradient(180deg, #ffffff 45%, #a9c4ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  margin: 0 0 clamp(18px, 3vw, 28px);
  color: var(--muted);
  font-size: clamp(13px, 2.2vw, 15px);
  line-height: 1.5;
}

.features {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(6px, 1.5vw, 12px);
}

.features li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: clamp(10px, 2vw, 16px) clamp(4px, 1vw, 10px);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  font-size: clamp(10px, 1.8vw, 12.5px);
  line-height: 1.3;
  color: var(--muted);
  text-align: center;
}

.features .fi {
  display: inline-flex;
  color: var(--accent-a);
}

.features .fi svg {
  width: clamp(18px, 3vw, 24px);
  height: clamp(18px, 3vw, 24px);
}

.cta {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: clamp(14px, 2.5vw, 18px) 20px;
  font-size: clamp(15px, 2.4vw, 17px);
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  background: linear-gradient(90deg, #1592d6, #6d44f0);
  box-shadow: 0 10px 26px rgba(109, 68, 240, 0.35);
  transition: transform 0.12s ease, filter 0.12s ease, opacity 0.12s ease;
}

.cta:hover { filter: brightness(1.06); transform: translateY(-1px); }
.cta:active { transform: translateY(0); }
.cta:disabled { opacity: 0.65; cursor: default; }

@media (min-width: 1024px) {
  .wrap {
    padding:
      max(40px, env(safe-area-inset-top, 0px))
      max(40px, env(safe-area-inset-right, 0px))
      max(40px, env(safe-area-inset-bottom, 0px))
      max(40px, env(safe-area-inset-left, 0px));
  }
  .bg { background-position: center 20%; }
  .bg::after {
    background: linear-gradient(
      180deg,
      rgba(10, 14, 23, 0.18) 0%,
      rgba(10, 14, 23, 0.42) 50%,
      rgba(10, 14, 23, 0.72) 100%
    );
  }
  .card { width: min(100%, 520px); }
}

@media (max-width: 640px) {
  .wrap {
    padding:
      max(16px, env(safe-area-inset-top, 0px))
      max(14px, env(safe-area-inset-right, 0px))
      max(16px, env(safe-area-inset-bottom, 0px))
      max(14px, env(safe-area-inset-left, 0px));
  }
  .bg { background-position: 55% 15%; }
  .bg::after {
    background: linear-gradient(
      180deg,
      rgba(10, 14, 23, 0.45) 0%,
      rgba(10, 14, 23, 0.58) 50%,
      rgba(10, 14, 23, 0.75) 100%
    );
  }
  .card { width: min(100%, 420px); }
}

@media (max-width: 400px) {
  .features {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .features li {
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    padding: 12px 14px;
    font-size: 13px;
    text-align: left;
  }
}