body {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ef 100%);
    min-height: 100vh;
}
.login-container {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(60, 72, 88, 0.18);
    padding: 2.5rem 2.5rem 2rem 2.5rem;
    max-width: 480px;
    margin: 60px auto 0 auto;
    position: relative;
}
.login-logo {
    width: 70px;
    margin-bottom: 1.2rem;
}
.login-title {
    font-size: 1.7rem;
    font-weight: 700;
    color: #1a237e;
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
}
.modern-form .modern-input {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(60, 72, 88, 0.06);
}
.modern-form input.form-control {
    border: none;
    background: #f4f6fb;
    font-size: 1rem;
    padding: 0.85rem 1rem;
}
.modern-form input.form-control:focus {
    background: #e3e9f7;
    outline: none;
    box-shadow: none;
}
.modern-btn {
    background: linear-gradient(90deg, #1a237e 0%, #1976d2 100%);
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    padding: 0.75rem 0;
    margin-top: 0.5rem;
    transition: background 0.2s;
}
.modern-btn:hover {
    background: linear-gradient(90deg, #1976d2 0%, #1a237e 100%);
}
.register-prompt {
    font-size: 1rem;
    color: #333;
}
.register-link {
    color: #1976d2;
    font-weight: 600;
    margin-left: 5px;
    text-decoration: none;
    transition: color 0.2s;
}
.register-link:hover {
    color: #1a237e;
    text-decoration: underline;
}
.login-footer {
    font-size: 0.95rem;
    color: #888;
}
.alert-danger {
    border-radius: 8px;
    background: #ffeaea;
    color: #c62828;
    border: 1px solid #ffcdd2;
    padding: 0.7rem 1rem;
}

.back-link {
    display: inline-block;
    margin-bottom: 1.2rem;
    color: #1976d2;
    font-weight: 600;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s;
}
.back-link:hover {
    color: #1a237e;
    text-decoration: underline;
}
.back-link i {
    margin-right: 6px;
}