* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Pretendard", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(0, 255, 209, 0.18), transparent 34%),
    radial-gradient(circle at top right, rgba(72, 126, 255, 0.18), transparent 34%),
    linear-gradient(135deg, #06111f 0%, #0b1020 45%, #050814 100%);
  color: #ffffff;
  min-height: 100vh;
}

.page {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 64px 0 40px;
}

.hero {
  text-align: center;
  padding: 56px 20px 44px;
}

.badge {
  display: inline-block;
  padding: 8px 18px;
  margin-bottom: 22px;
  border: 1px solid rgba(77, 255, 218, 0.45);
  border-radius: 999px;
  color: #78ffe7;
  background: rgba(77, 255, 218, 0.08);
  font-size: 14px;
  letter-spacing: 0.04em;
}

h1 {
  font-size: clamp(48px, 8vw, 88px);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.06em;
  margin-bottom: 24px;
}

.subtitle {
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.55;
  color: #d7f7ff;
  font-weight: 700;
  margin-bottom: 22px;
}

.notice {
  font-size: 18px;
  line-height: 1.7;
  color: #a9b8ca;
}

.tools {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 34px;
}

.tool-card {
  position: relative;
  padding: 32px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.075);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(14px);
}

.tool-card.active {
  border-color: rgba(77, 255, 218, 0.36);
  box-shadow: 0 24px 80px rgba(0, 255, 209, 0.12);
}

.tool-label {
  display: inline-block;
  margin-bottom: 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(77, 255, 218, 0.14);
  color: #78ffe7;
  font-size: 14px;
  font-weight: 800;
}

.tool-label.gray {
  background: rgba(255, 255, 255, 0.1);
  color: #b8c4d6;
}

.tool-card h2 {
  font-size: 26px;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.tool-card p {
  font-size: 17px;
  line-height: 1.7;
  color: #d6deeb;
  margin-bottom: 12px;
}

.tool-card .small {
  color: #a9b8ca;
  font-size: 15px;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 800;
  font-size: 15px;
  transition: 0.2s ease;
}

.btn.primary {
  color: #041014;
  background: linear-gradient(135deg, #6dffe8, #31c8ff);
}

.btn.secondary {
  color: #d9fbff;
  border: 1px solid rgba(217, 251, 255, 0.28);
  background: rgba(255, 255, 255, 0.06);
}

.btn.disabled {
  color: #99a8ba;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.045);
  cursor: default;
}

.btn.primary:hover,
.btn.secondary:hover {
  transform: translateY(-2px);
}

.guide {
  margin-top: 26px;
  padding: 30px;
  border-radius: 24px;
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.guide h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.guide p {
  font-size: 17px;
  line-height: 1.75;
  color: #c8d4e4;
}

footer {
  text-align: center;
  padding: 44px 0 10px;
  color: #91a3b8;
  line-height: 1.7;
}

footer p:first-child {
  color: #78ffe7;
  font-weight: 800;
}

@media (max-width: 820px) {
  .page {
    width: min(94%, 620px);
    padding-top: 36px;
  }

  .hero {
    padding: 42px 8px 28px;
  }

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

  .tool-card {
    padding: 26px;
    border-radius: 24px;
  }

  .button-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}