:root {
  --bg: #f3f6fa;
  --panel: #ffffff;
  --line: #d5dee8;
  --text: #1f2a35;
  --muted: #6b7784;
  --brand: #0b6cc2;
  --brand-dark: #0859a1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Arial, sans-serif;
  background: radial-gradient(circle at top right, #dde9f7 0%, var(--bg) 50%, #eef2f7 100%);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.2rem;
  box-shadow: 0 22px 52px rgba(20, 36, 56, 0.12);
}

h1 {
  margin: 0 0 0.4rem;
  font-size: 1.4rem;
}

p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}

label {
  font-size: 0.84rem;
  color: #4b5b6c;
}

input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.58rem 0.65rem;
  font: inherit;
}

button {
  width: 100%;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  border-radius: 10px;
  padding: 0.62rem 0.75rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

.msg {
  margin-top: 0.75rem;
  min-height: 1.1rem;
  font-size: 0.86rem;
  color: #9f1a1a;
}

.hidden {
  display: none;
}