:root {
  --bg-start: #eaf8f1;
  --bg-end: #f7fbfd;
  --text: #12312a;
  --muted: #4b6b63;
  --primary: #1f8b4c;
  --primary-hover: #176d3b;
  --card: #ffffff;
  --line: #d9e8df;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: linear-gradient(145deg, var(--bg-start), var(--bg-end));
}

.hero {
  width: 100%;
  max-width: 760px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 16px 40px rgba(10, 40, 30, 0.08);
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
}

p {
  margin: 0 auto 26px;
  max-width: 560px;
  color: var(--muted);
  line-height: 1.5;
}

.btn-login {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 12px;
  background: var(--primary);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-login:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-login:active {
  transform: translateY(0);
}