* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: linear-gradient(180deg, #0b0e11 0%, #11161b 100%);
  color: #e8edf2;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.panel {
  width: 100%;
  max-width: 760px;
  background: rgba(15, 19, 24, 0.96);
  border: 1px solid #28313a;
  padding: 44px 34px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

.brand {
  margin: 0 0 28px 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: #95a2af;
}

h1 {
  margin: 0 0 18px 0;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #f3f6f9;
}

.lead {
  margin: 0 0 12px 0;
  font-size: 1.12rem;
  color: #d9e0e7;
}

.text {
  margin: 0;
  max-width: 42em;
  color: #b7c1cb;
}

.spec {
  margin-top: 28px;
  padding: 22px 22px 18px;
  border: 1px solid #28313a;
  background: #0f1419;
}

.spec-title {
  margin: 0 0 10px 0;
  font-size: 0.96rem;
  font-weight: 600;
  color: #edf2f7;
}

ul {
  margin: 0;
  padding-left: 18px;
}

li {
  margin-bottom: 6px;
  color: #b7c1cb;
}

.actions {
  margin-top: 28px;
}

.button {
  display: inline-block;
  padding: 14px 20px;
  background: #e8edf2;
  color: #0d1115;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: opacity 0.2s ease;
}

.button:hover {
  opacity: 0.9;
}

.contact {
  margin: 20px 0 0 0;
  font-size: 0.93rem;
  color: #8e9aa6;
}

@media (max-width: 640px) {
  .panel {
    padding: 32px 22px;
  }

  .spec {
    padding: 18px 16px 14px;
  }

  .button {
    width: 100%;
    text-align: center;
  }
}