@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Poppins', sans-serif;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(-45deg, #0f172a, #1e293b, #334155, #0f172a);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: #fff;
}

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

.login-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header h2 { font-size: 2rem; margin-bottom: 0.5rem; }
.login-header p { color: #cbd5e1; margin-bottom: 2rem; font-size: 0.9rem; }

.input-group { margin-bottom: 1.5rem; text-align: left; }
.input-group label { display: block; margin-bottom: 0.5rem; font-size: 0.85rem; color: #e2e8f0; }
.input-group input {
    width: 100%;
    padding: 0.8rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(0, 0, 0, 0.2);
    color: white;
    outline: none;
    transition: 0.3s;
}
.input-group input:focus { border-color: #38bdf8; background: rgba(0, 0, 0, 0.4); }

.btn-login {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    background: #38bdf8;
    color: #0f172a;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}
.btn-login:hover { background: #0ea5e9; transform: translateY(-2px); }

.error-msg {
    background: rgba(220, 38, 38, 0.2);
    color: #fca5a5;
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid rgba(220, 38, 38, 0.5);
}

.back-link { display: block; margin-top: 1.5rem; color: #94a3b8; text-decoration: none; font-size: 0.85rem; }
.back-link:hover { color: white; }