:root {
  --blue: #1b6fb9;
  --blue-dark: #174f8f;
  --text: #161a22;
  --muted: #5d6675;
  --white: #ffffff;
  --border: rgba(22, 26, 34, 0.11);
  --shadow: 0 28px 80px rgba(24, 73, 121, 0.16);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: #f6fafe url("assets/background.svg") center/cover fixed no-repeat;
}

.landing {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}

.card {
  width: min(100%, 560px);
  padding: 48px;
  border: 1px solid var(--border);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  justify-content: center;
  margin-bottom: 26px;
}

.logo {
  width: min(100%, 390px);
  height: auto;
  display: block;
}

.description {
  max-width: 460px;
  margin: 0 auto 34px;
  text-align: center;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

.mail-button {
  width: fit-content;
  min-width: 100%;
  margin: 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  padding: 15px 24px;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 14px 34px rgba(27, 111, 185, 0.26);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.mail-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(27, 111, 185, 0.32);
}

.mail-button:focus-visible {
  outline: 4px solid rgba(27, 111, 185, 0.18);
  outline-offset: 4px;
}

@media (max-width: 620px) {
  .landing {
    padding: 18px;
  }

  .card {
    padding: 32px 22px;
    border-radius: 24px;
  }

  .description {
    font-size: 15.5px;
    margin-bottom: 28px;
  }
}