:root {
  --bg1: #0f0f10;
  --bg2: #1a1a1e;
  --glass: rgba(30, 30, 35, 0.7);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f1f1f5;
  --subtext: #9a9aa3;
  --primary1: #6e8efb;
  --primary2: #a777e3;
}

body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(-45deg, var(--bg1), var(--bg2), #141418, #0a0a0c);
  background-size: 400% 400%;
  animation: gradientBG 10s ease infinite;
  font-family: "Segoe UI", sans-serif;
  color: var(--text);
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

h2 {
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
  background: linear-gradient(to right, var(--primary1), var(--primary2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  outline: none;
  transition: 0.3s;
}

.input:focus {
  border-color: var(--primary1);
  box-shadow: 0 0 10px rgba(110, 142, 251, 0.3);
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--primary1), var(--primary2));
  color: white;
  font-weight: bold;
  cursor: pointer;
}

.topbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: 60px;
  background: rgba(15, 15, 18, 0.6);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding-right: 1rem;
  backdrop-filter: blur(8px);
}

.logout {
  padding: 8px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}