:root {
  --bg-1: #f2f8ff;
  --bg-2: #fff8ef;
  --text: #1b2430;
  --muted: #5b6878;
  --card: #ffffff;
  --line: #dce5ef;
  --primary: #1c6ee7;
  --primary-hover: #1557ba;
  --input-bg: #f9fbff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(28, 110, 231, 0.12), transparent 45%),
    radial-gradient(circle at 90% 80%, rgba(255, 173, 59, 0.15), transparent 38%),
    linear-gradient(140deg, var(--bg-1), var(--bg-2));
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 460px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(20, 35, 58, 0.12);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 2.5vw, 1.9rem);
}

.subtitle {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.45;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.field {
  margin-bottom: 14px;
}

input[type="email"],
input[type="password"] {
  width: 100%;
  border: 1px solid #cfdceb;
  background: var(--input-bg);
  border-radius: 12px;
  padding: 11px 12px;
  font: inherit;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="email"]:focus,
input[type="password"]:focus {
  border-color: #4a8bf0;
  box-shadow: 0 0 0 3px rgba(74, 139, 240, 0.2);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 4px 0 18px;
  flex-wrap: wrap;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.93rem;
}

.recover {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.93rem;
}

.recover:hover {
  text-decoration: underline;
}

.login-error {
  background: #fde8e8;
  color: #b91c1c;
  border: 1px solid #fca5a5;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.btn {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 12px 14px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

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

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

.back {
  display: inline-block;
  margin-top: 16px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.93rem;
}

.back:hover {
  color: var(--text);
  text-decoration: underline;
}